Shaanxi Shanqing Environmental Technology Co., Ltd. Cases

Electronic Industrial Park Wastewater Treatment   1. Project overview Electronics Industrial Park includes chip packaging and testing area, PCB area and smart home appliance manufacturing area. In the daily production and operation process of enterprises in the park, a large number of high-concentration wastewater will be generated, and the wastewater is of many types and the water quality is complex. Liyuan environmental Protection will not pretreat the wastewater of various types, and then carry out biochemical treatment and deep treatment according to the situation of the park. Finally, the water reaches the reuse standard.   2. Design inlet and outlet water quality According to the information provided by the owner, combined with the analysis of the actual operation experience of Liyuan Environmental Protection in the past, it is decided to design the influent water quality as follows: pH: 6-9 COD: 30000mg/L Ammonia nitrogen: 100mg/L After the wastewater is treated by the sewage treatment station, it meets the "Discharge Standard of Electroplating Water Pollutants" and is discharged into the municipal sewage network and industrial sewage treatment plant for phase II treatment. The specific influent indicators are as follows: pH: 6-9 SS: ≤60mg/L CODcr: ≤100mg/L Ammonia nitrogen: ≤16mg/L Total nitrogen: ≤30mg/L Total phosphorus: ≤1.0mg/L Total nickel: ≤0.1mg/L Total silver: ≤0.1mg/L Total chromium: ≤0.5mg/L Hexavalent chromium: ≤0.1mg/L Total copper: ≤0.3mg/L Total cyanide (in CN) : ≤0.2mg/L   3. Technical analysis of wastewater treatment process In the wastewater treatment project of the electronic industrial park, different types of pre-treated sewage are sent to the biochemical regulating tank, the water quality and quantity are adjusted, appropriate nutrients are added, and then the biochemical regulating tank lift pump is pumped into the ph regulating tank 1 and acidic agents are added to adjust the ph, and then the ph regulating tank 2 and alkaline substances are added to adjust the acid and alkaline of the comprehensive wastewater. The effluent from the ph regulating tank 2 is sent to the transfer tank. The comprehensive waste water pump is pumped into the air flotation treatment system through the lifting pump of the transfer tank, the PH is adjusted in the air flotation tank 3, and the reagent is added to react with the treated water. The solid particles in the waste water condense in the reaction, forming flocculant alum. After mixing with the pressurized dissolved gas, the dissolved gas sticks to the flocculant to form an upward trend, and then enters the separation area of the air flotation device. The flocculant rises to the liquid level to form a separation layer, so as to remove solid impurities, insoluble suspended matter and oil in the wastewater, so that the treated water body is clear and transparent, and the scum of the air flotation system is automatically scraped out to the physicochemical organic sludge tank through the slag scraper, and the treated effluent is sent to the anaerobic reaction tank. The wastewater flows into the bottom of the sludge bed of the anaerobic reaction tank and is mixed with the granular sludge layer and suspended sludge layer. The efficient degradation of the granular sludge provides the substrate for the methanation stage in the mixed anaerobic digestion process. Under the action of methanogens, most of the organic matter in the sewage is decomposed into carbon dioxide and methane, and most of the organic pollutants are removed. Reduce the subsequent biochemical tank processing load. The wastewater is fully in contact with the anaerobic granular sludge in the anaerobic reaction tank, and the anaerobic digestion liquid separated by the three-phase separator is discharged into the anaerobic regulation tank, and then back into the internal system of the anaerobic reactor, and a part is discharged into the anoxic tank for subsequent treatment.  

chemical wastewater treatment project 1. Project overview According to the relevant information provided by the owner, the wastewater treated by the sewage station of this project mainly includes esterification wastewater and polymerization wastewater, among which esterification wastewater is 43.2m3/d and polymerization wastewater is 4.8m3/d. The wastewater has a high concentration and contains some polymeric lipid pollutants. The daily discharge of sewage is expected to reach 198m3/d, and the treated sewage is discharged to the local sewage treatment plant for further treatment.   2. Design inlet and outlet water quality Design inlet water quality is as follows: COD: 20000mg/L SS: 160mg/L pH: 3~5 Ammonia nitrogen: 128mg/L Formaldehyde: 87mg/L Phenol: 1896mg/L The effluent index is as follows: COD: 500mg/L SS: 250mg/L pH: 6 ~ 9 Chroma: 100mg/L Petroleum: 20mg/L Volatile phenol: 2mg/L Ammonia nitrogen: 25mg/L Formaldehyde: 5mg/L TDS: 3000mg/L   3. Technical analysis of wastewater treatment process In the project, the production wastewater treated by the sewage station mainly consists of esterification wastewater and polymerization wastewater, both of which contain certain grease, and need to be separately collected after oil removal and quantitatively mixed with other wastewater for treatment. The amount of polymeric wastewater is small, but the COD concentration is as high as 197000mg/L, and it is especially necessary to control the amount of this wastewater when mixing. The amount of water in the esterification wastewater is large, the COD concentration is about 30,000-5000mg /L, the main pollutants are from ethylene glycol, aldehydes, terephthalic acid and their intermediate products, and the composition of the wastewater is complex. The molecular weight of the main pollutants in wastewater is low, which is suitable for treatment by microbial metabolism, but the direct biochemical treatment of wastewater has a certain toxic effect on microorganisms. Therefore, for high-concentration chemical wastewater, appropriate physical and chemical pretreatment should be carried out before further biochemical treatment. Dilute water is mixed with the first two streams of high concentration water to reduce the biological toxicity of wastewater. The project adopts physicochemical pretreatment to remove toxic substances in wastewater, improve the biodegradability of wastewater, and reduce the difficulty of biochemical treatment of wastewater. Then, it is mixed with other wastewater for biochemical treatment and advanced treatment.

Pharmaceutical wastewater treatment project 1. Project overview There are many kinds of wastewater in this wastewater treatment project, and the drainage time of production wastewater is uncertain, resulting in unbalanced water and quality, and large fluctuation of sewage concentration, which brings difficulty to the stability of biochemical treatment of sewage. 2. High concentration of organic matter, especially the wastewater produced by water extraction, alcohol extraction and concentration of Chinese patent medicine, belongs to high concentration organic sewage, with a wide variety of wastewater, complex composition and acidic pH value. There are no conditions for direct biochemical treatment. Wastewater contains lignin, fiber, organic acid, tannin and other macromolecular organic matter, low BOD/COD ratio, poor biodegradability, containing a large number of organic matter difficult to biodegrade and even toxic side effects to microorganisms, the biodegradation rate is slow. After the completion of the traditional Chinese medicine wastewater treatment project, the sewage treatment capacity is 420m3/d, of which the high-concentration wastewater is 100m3/d and the low-concentration wastewater is 320m3/d. The high concentration wastewater and low concentration wastewater are pretreated respectively and then mixed for treatment, which effectively reduces the treatment cost and makes the whole system economical.       2. Design inlet and outlet water quality According to the data provided by the company and the wastewater site operation data, the design of inlet water quality is as follows: pH: 4~9 COD: 12500mg/L SS: 1100mg/L The effluent of the project meets the Level A standard of Pollutant Discharge Standard of Urban Sewage Treatment Plant, Table 2 standard of Water Pollutant Discharge Standard of Mixed Pharmaceutical Industry and Water pollutant Discharge Standard of Extraction pharmaceutical Industry Enterprise. The project wastewater reuse meets the washing water standard of "Urban Sewage Recycling Industrial Water Quality". The main indicators are as follows: pH: 6-9 Chemical oxygen demand: 50mg/L 5 days BOD: 10mg/L Suspended matter: 10mg/L Animal and vegetable oil: 1mg/L Oil: 1mg/L Anionic surfactant: 0.5mg/L Ammonia nitrogen (N) : 5mg/L Total nitrogen (N) : 15mg/L Total phosphorus (in P) : 0.5mg/L Chroma: 30 Number of fecal coliforms (individual /L) : 103 Acute toxicity: 0.07mg/L Total organic carbon: 20mg/L Reuse water standard pH: 6.5-9 5 days BOD: 30mg/L Suspended matter: 30mg/L Chroma: 30 Number of fecal coliforms (pieces /L) : 2000   3. Sewage treatment process analysis Based on the analysis of the status quo of the sewage station of the enterprise, the following measures are adopted to expand and renovate the sewage treatment station: A. The current low-concentration wastewater of the sewage station contains some high-concentration wastewater, but the discharge is irregular and the water quality changes greatly, so the low-concentration wastewater must be pretreated together with the high-concentration wastewater, which is the main reason for the excessive sludge output of the sewage station. Therefore, Party a shall completely separate the two wastewater streams in this expansion. b, low concentration wastewater water quantity is large, the original rotary filter is difficult to meet the requirements, because the replacement of a higher filtration capacity, fiber separation capacity of stronger rotary filter for pretreatment; The amount of high-concentration wastewater is small, so it can continue to be pretreatment by the original process of "regulating tank → rotating filter → coagulation air floating → coagulation precipitation". c. Highly concentrated wastewater contains saponins, stearic acid, oleic acid and other components, so a certain amount of calcium chloride is added to the original reagent in the coagulation gas floating section to enhance the coagulation effect on the wastewater.

Ⅰ COD of seawater The COD value in seawater is usually low, generally between 1-10 mg/L. Chemical oxygen demand (COD) is an important water quality indicator used to measure the value of reducing substances in water .   Reducing substances may include organic matter, nitrite, sulfide, etc., which can be measured by oxidants. Seawater usually has a low COD value due to its composition and environment.   This is because seawater contains less organic matter and other reducing substances, the content of which is affected by many factors, including climate, geographical location, and biological species.   Understanding COD values in seawater is important for assessing ocean health and water quality management, especially when considering the protection of marine ecosystems and the impact of human activities on the marine environment. Ⅱ Ion ratio of seawater The ratio of various ions in seawater is relatively stable, a property known as the constancy of seawater composition. This constancy provides favorable conditions for studying the physical and chemical properties of seawater.     The concentration ratios of these ions are relatively constant, mainly due to the mixing of seawater, its huge volume, and its long-term historical evolution, which makes it difficult for external influences (such as continental runoff) to cause significant changes in their relative composition. Ⅲ Mineralization and ion content The mineralization of seawater refers to the total amount of dissolved salt substances in seawater , which is an important indicator to measure the salt content of seawater.   The average salinity of seawater on Earth is about 35‰ (35 grams of salt per kilogram of seawater), and TDS is 35,000 ppm.     However, the mineralization of seawater varies by region and depth.   The ion content in seawater is determined by its proportion in the seawater.   The major elements in seawater include the following and their average concentrations:   Chloride ion (Cl - ): 19.10 g/kgSodium ion (Na + ): 10.62 g/kgMagnesium ion (Mg 2+ ): 1.29 g/ kgSulfate ion (SO 4 2- ): 2.74 g/kgCalcium ion (Ca 2+ ): 0.412 g/kgPotassium ion (K + ): 0.399 g/kgBoron (B): 4.5 mg/kgCarbonate (CO 3 2- /HCO 3 - ): 27.6 mg/kgFluoride ion (F - ): 1.3 mg/kgSilicate (Si): 2.8 mg/LBromide ion (Br - ): 67 mg/kgStrontium ion (Sr 2+ ): 7.9 mg/kg   In addition, the salt in seawater mainly exists in the form of sodium chloride (NaCl), accounting for 77.7% of the salt content of seawater, followed by magnesium chloride (MgCl 2 ) accounting for 10.9% , magnesium sulfate (MgSO 4 ) accounting for 4.9%, calcium sulfate (CaSO 4 ) accounting for 3.6%, potassium sulfate (K 2 SO 4 ) accounting for 2.5%, calcium carbonate (CaCO 3 ) accounting for 0.3%, and other salts. Figure 3 Salt content in seawater   It should be noted that these values are averages, and the actual chemical composition of seawater may vary depending on factors such as geographical location, season, and climate. Ⅳ The oil content in seawater is very low The oil content of seawater usually refers to the content of oil substances in seawater, which may come from natural phenomena or human activities.   Every year, approximately 5 to 10 million tons of oil enters water bodies through various channels around the world, of which about 8% comes from natural sources and about 92% comes from human activities.   Sources from human activities include tanker accidents, leaks from offshore oil exploration, oily wastewater discharged from ports and ship operations, oil industry wastewater, and oily wastewater discharged from the catering industry, food processing industry, and car wash industry.                                   After oil pollutants enter the water environment, they will undergo processes such as migration, transformation and oxidation degradation, resulting in a general decrease in the oil content in the water. There are four main states of oil pollutants in water bodies: floating oil, emulsified oil, dissolved oil and condensed residues.   When the oil content in seawater reaches 0.01 mg/L, it can cause fish, shrimp, and shellfish to have an odor within 24 hours, affecting the edible value of aquatic products. Therefore, monitoring and controlling the oil content in seawater is crucial to protecting the marine ecological environment and human health.   Normal unpolluted seawater contains oil in the microgram range.   In summary, the COD and scaling ion content of seawater are very low, and there is almost no oil. Seawater desalination has become a very mature technology. Ⅴ Industrial wastewater with a higher salt content than seawater Industrial wastewater with a higher salt content than seawater mainly comes from a number of industries, which produce wastewater containing a large amount of salt during the production process. The main industries are :   (1)Chemical and petrochemical industries   The chemical and petrochemical industries are one of the main sources of industrial high-salinity water. These industries produce a large amount of wastewater during the production process, which contains a large amount of salt, such as sodium chloride, calcium chloride, sodium sulfate, etc. The salt concentration of these wastewaters is often much higher than that of seawater.   (2)Mining and mineral processing   The mining and mineral processing process produces a large amount of tailings and wastewater, which also contains a lot of salt and is one of the important sources of industrial high-salinity water. The salt content of these wastewaters may also exceed that of seawater.   (3)Food processing   A large amount of wastewater is generated during food processing. In addition to organic matter, these wastewaters may also contain a large amount of salt, such as sodium chloride, potassium chloride, etc. Although the specific salt content varies depending on the processing type and process, some food processing wastewater may also have a high salt content.   (4)Papermaking and pulping   The paper and pulping process generates a large amount of wastewater, which contains not only organic matter but also salts such as sodium chloride and sodium sulfate. Although the salt concentration of these wastewaters may vary depending on the process and raw materials, in some cases, their salt content may exceed that of seawater.   (6)Textile and printing and dyeing   The textile and printing and dyeing processes also generate a large amount of wastewater, which may contain salt substances such as sodium chloride and potassium chloride. Although the salt concentration of these wastewaters may vary depending on the specific process and dye, the salt content of the wastewater may also be high in some printing and dyeing processes.   (7)Other industries   In addition to the above industries, some other industries may also produce high-salt wastewater, such as desulfurization wastewater from the power industry, wastewater from the coal chemical industry, etc. The salt content of these wastewaters may also exceed that of seawater.   It should be noted that the salt content of industrial high-salt water produced by different industries is different, and the specific salt type and concentration are also affected by many factors. Therefore, when treating these high-salt wastewaters, it is necessary to choose appropriate treatment methods and technical means according to the actual situation. Ⅵ Zero discharge of industrial wastewater is very close to the requirements of seawater desalination (pretreatment + membrane process) Achieving zero discharge of industrial high-salinity wastewater requires a systematic solution. First, physical or chemical pretreatment methods are generally used to remove suspended solids, colloids and general scaling ions. Then, membrane treatment processes are used to reuse fresh water and reduce wastewater. Finally, the concentrate is evaporated and crystallized to achieve zero discharge of wastewater. This article mainly introduces the commonly used membrane treatment processes.     We can understand it this way: by using physical, chemical, biochemical and other methods to treat high-salt, high-hardness, high-COD industrial wastewater to a composition close to that of seawater, we can also use the idea of seawater desalination to solve the "zero emission" problem.   According to the membrane pore size separation, commonly used membrane technologies can be divided into microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), etc.     According to the filtration pressure and the final concentration multiple, the reverse osmosis commonly used for zero wastewater discharge can be further divided into low-pressure reverse osmosis (such as BWRO), medium-pressure reverse osmosis (seawater membrane SWRO), high-pressure reverse osmosis (HPRO or DTRO), etc.   At the same time, there are also technologies such as EDI (electrodialysis) and forward osmosis (FO) on the market that have been applied to the high-salt zero-emission industry. Due to their different scope of use and different working conditions, their combined design has been widely used in zero-emission projects.

Recently, the mine water and domestic sewage treatment system renovation project at a coal mine in Shaanxi, managed by Shanqing Environmental, was successfully completed. The treated water consistently meets discharge standards and reuse requirements. Shanqing Environmental provided process optimization design solutions and equipment replacement and maintenance plans for this project. The specific services included renovation scheme design, equipment supply, process and system optimization, replacement of old equipment, and repair services for faulty equipment. ⅠMine Water Treatment System 1.Treatment capacity: 100-120 m³/h; actual 150 m³/h, average operation of 16 hours. 2.Treatment Process:           3.Treatment Units:  Regulating Sedimentation Tank (Volume: 3000 cubic meters)         Inlet Water                                           Effluent Water        Removal of Inclined Tube Washing         Bracket and Inclined Tube Installation 4.Improvement Measures: Channel steel will be made of stainless steel, utilizing the existing stainless steel round bars. The overall height of the bracket will be increased by 50 centimeters. The existing carbon steel bracket is severely corroded, with the welds between the two channel steels and the wall breaking and collapsing. The upper part of the inclined tube will be secured with round pipes and ropes to prevent flotation and tilting. The original inclined tube was installed using a bundling method, which easily led to the tubes floating, loosening, and tilting. In this instance, each row of inclined tubes will be installed separately, with each group connected, welded, and reinforced. Fully Automatic Filter （2 sets, with a single set's treatment capacity of 50-60 m³/h）            Filter Cap and Media Installation   Chemical Dosing System （2 sets of 4 units, each with a capacity of 1000 liters）      300 L dosing pumps, 2 units                            500 L dosing pumps, 2 units   Sludge Treatment System（1 set）                                                                                          60 square meters of old plate-and-frame filters, underground sludge tank               180 square meters of current plate-and-frame filters, 3 tons per cycle     Ⅱ Reverse Osmosis Treatment System 1.Treatment Capacity: 80-90 m³/h 2.Treatment Process：        3.Treatment Units： Mechanical Filter (2 sets of 4 units, with a single set's treatment capacity of 50-60 m³/h)         Reverse Osmosis Equipment （1 set, with a treatment capacity of 80-90 m³/h）                Chemical Dosing Equipment and Reuse Water Tank                                                                                      500 L chemical barrels, 4 sets                                                          450 m³ stainless steel water tank   4.Improvement Measures： During the reinstallation of equipment entry holes, valves, and pipelines, prepare necessary materials in advance. Disassemble and reseal any areas prone to leakage. When cleaning the filter, block the lower pipe outlet. Once cleaned thoroughly, restore or disassemble the pipe for further cleaning. Replace any damaged parts promptly during the disassembly process and reinforce them. Ⅲ Domestic Sewage Treatment System 1.Treatment capacity: 300-350 m³/d, actual 400-450 m³/d. 2.Treatment Process:   3.Treatment Unit：                Sludge Dewatering                                                          square meters plate-and-frame filter press                                         Pneumatic Diaphragm Pump   2 sets of mechanical filters, 15 m³/h                 2 sedimentation tanks, 15 m³/h （This time, cleaning of inclined tubes and sludge）         4.Improvement Measures: Sedimentation tanks are equipped with flow distribution tubes and peripheral effluent weirs. Clean the old inclined tubes and sludge, and clear the central tube. PAM and PAC were directly added into the flow distribution tube without separate mixing time, resulting in clogging of the central tube. This time, replace the sludge pump and improve the flexible hose connection method during installation. Through this upgrade and renovation, the overall system's treatment performance has significantly improved: The equipment selected for the renovation is efficient and energy-saving, with no noise impact on the surrounding environment. After the renovation, all equipment can achieve systematic, fully automated operation without the need for dedicated supervision. After renovation and maintenance, a 1-year warranty is provided for equipment operation, ensuring worry-free renovation and repair. Through process and equipment optimization, the overall water treatment system's operating efficiency has improved by 12.5%. The treatment system is more stable, reducing significant water quality fluctuations that could impact production. A dedicated person will provide 24-hour project after-sales service and offer 1 year of free remote technical support and operational training at no additional cost. For this project, the water treatment system optimization and renovation have been completed on schedule and to quality standards as stipulated in the contract. The stability and efficiency of the entire system have significantly improved. After project completion, free operational training is provided to the client.  

Anodizing is an electrochemical process that involves treating the surface of a metal, typically aluminum, to form a durable, corrosion-resistant, and aesthetically pleasing finish. This process is widely used in the aerospace, automotive, and defense industries, as well as in many other applications that require high performance and long-lasting durability.   Unless otherwise specified, anodizing typically refers to sulfuric acid anodizing. The oxidation process that occurs when substances other than metals are used as the anode is also referred to as anodizing.   ⅠSources of Anodizing Wastewater The wastewater from anodizing primarily originates from the degreasing and cleaning processes of aluminum products, the alkaline etching and cleaning processes, the pickling and cleaning processes, the chemical polishing and cleaning processes, the anodizing and cleaning processes, the dyeing and cleaning processes, and the sealing and cleaning processes. Degreasing/Deoiling Organic solvent deoiling Ultrasonic deoiling Electrochemical deoiling Alkaline deoiling Water-based degreasing agent （1）Anionic surfactant: releases negatively charged active groups in water. （2）Cationic surfactants: ammonium salts, quaternary ammonium salts; they have poor detergency but strong bactericidal properties and are effective antistatic agents. （3）Amphoteric surfactants. （4）Nonionic surfactants: They do not ionize, have good stability, do not adsorb on metal surfaces, are easy to rinse, leave minimal residue, and have excellent rinsability. They are the most ideal cleaning agents for metal parts.   Ⅱ Anodizing Wastewater Treatment Process Segregated collection and diversion 1.Nickel-containing wastewater treatment   After collecting the cold sealing solution, it enters the evaporation system. The cold sealing rinse water is first treated using SRO special separation membranes to produce water that is then directed into the recycling tank. The concentrated water is then concentrated using WEM technology before entering the evaporation system. This process achieves zero discharge of nickel-containing wastewater.   2.High COD wastewater treatment   Due to the high CODcr_{cr}cr​ in the oil, wax removal, and degreasing tank water, pre-treatment is carried out through coagulation and sedimentation. The treated effluent then enters the A/O process to remove COD, and subsequently, it undergoes secondary coagulation and sedimentation before entering the comprehensive wastewater treatment system.   3.Phosphorus-containing wastewater treatment   Phosphorus-containing wastewater is collected separately. The tank liquid wastewater is pumped drip-by-drip into a collection pit, and the electrolytic polishing rinse water undergoes secondary coagulation and sedimentation to remove phosphorus before entering the comprehensive wastewater treatment system.   4.Comprehensive wastewater treatment   After pre-treatment of the comprehensive wastewater using coagulation and sedimentation, it enters the A/O biochemical system for further biochemical treatment. The treated water then goes into the comprehensive recycling system, achieving water resource reuse and energy conservation. The purified water is used as makeup water, while the concentrated water is processed by concentration treatment equipment to meet discharge standards. Process flow diagram: Ⅲ Specialized Processes For Anodizing Wastewater 1.Treatment processes for the first and second rinsing waters after chemical polishing   During the chemical reaction process with phosphoric acid/sulfuric acid, only 10%-15% reacts to form aluminum phosphate and aluminum sulfate, while the remaining 85%-90% adheres to the surface of the workpieces and is carried into the rinse tank.   According to empirical data, 1 ton of phosphoric acid will generate 4-7 tons of sludge through chemical precipitation (depending on the discharge standards).     2.Treatment processes for chemical polishing/anodizing wastewater   Anodizing rinse acid has an acid concentration of around 17-25% and an aluminum content of 10-15 g/L. Conventional treatment processes typically involve neutralization and sedimentation, followed by transferring the sludge as hazardous waste. This approach wastes both aluminum and acid resources and is costly. Aluminum removal resin treatment offers high precision, with aluminum content reduced to below 0.02 ppm. High adsorption capacity, with a maximum actual exchange capacity of up to 20 g/L. High selectivity, capable of efficiently adsorbing aluminum in 15-20% sulfuric acid. Highly adaptable, capable of removing aluminum in high-concentration acidic environments (15-20% acid). • 65-80% phosphoric acid • 0-10% sulfuric acid • 2-4% nitric acid（Many processes now do not include） • 35-45 g/L aluminum • smoke suppressant   By separating dissolved aluminum from the acid, the acid can be recycled and reused in the process. The advantages are as follows: Reduces the need for purchasing acid； Reduces the cost of neutralizing spent acid; Reduces waste sludge— in some cases, waste aluminum can be converted into commercially valuable by-products. Reduces the concentration of waste salts (eg:lower nitrate and phosphate levels). Treatment processes for dyeing wastewater                                       

Pure water equipment customer site installation example:   Pure water equipment customer site installation example The pure water preparation process used at the customer site mainly consists of three processes: pretreatment + core treatment + auxiliary treatment. The pretreatment process of pure water preparation mainly consists of coagulation and sedimentation, flotation, oxidation dosing, reduction dosing, scale inhibition dosing, pH adjustment, temperature adjustment, quartz sand filtration, activated carbon filtration, multi-media filtration, iron and manganese removal filtration, resin adsorption (softening), degassing, precision filtration, ultrafiltration and other processes as needed. The auxiliary treatment process of pure water preparation mainly consists of pH adjustment, degassing membrane, ultraviolet sterilization, TOC removal, pasteurization, nitrogen sealed water tank, terminal filtration, circulation pipeline, etc., which can be selected as needed. Shanqing Environmental Technology Company provides pure water preparation solution design, equipment supply, installation guidance and commissioning according to the actual situation of the customer site to meet the customer's on-site use needs.    

Project Name: North Korea - Galvanized Wastewater Treatment and Resource Recovery Project Project Overview: Electroplating wastewater treatment, with a designed capacity of 100 m³/day. Services: Equipment supply and installation guidance.  

Project Overview: Domestic sewage from an industrial park, with a designed capacity of 2,000 m³/day. Services: Equipment supply and installation guidance.  

Project Name: Fluoride-Containing Wastewater Treatment Project in Ethiopia   Project Overview: Treatment of fluoride-containing wastewater, with a designed capacity of 100 m³/day. Services: Equipment supply and installation.    

Project Overview: The client mainly produces chemical products such as ethanolamine, ammonium nitrate, and porous ammonium nitrate. The designed treatment capacity is 16,000 m³/day. Service Type: Equipment installation, system commissioning services.    

Project Overview: Wastewater from anodizing production line, with a designed treatment capacity of 2,400 m³/day. Services: Scheme design, equipment supply, system commissioning.