A domestic rice wine production enterprise has a wastewater volume of 3500m3/d, and the wastewater discharge complies with the management standards. Based on the information provided by the owner and our company's relevant treatment experience in similar industries, Shanqing Environment has conducted a comprehensive investigation and analysis of the sewage quality and quantity, and based on the principle of "separation of clear and turbid water, and compliance with effluent standards", provided supporting water treatment solutions for the wastewater treatment station. While ensuring the treatment effect, the investment and operating costs are reduced as much as possible.
1. Design principles
▲ Design processing capacity: 3500m3/d
▲ Processing standards
The effluent quality of this project must meet the piped standard - "Water Quality Standards for Sewage Discharge into Urban Sewers", some indicators are shown in Table 2.
▲ Design principles
Based on the information provided by the owner and our company's relevant treatment experience in similar industries, and after a comprehensive investigation and analysis of the sewage quality and quantity, we provide supporting water treatment solutions for the wastewater treatment station in accordance with the principle of "separating clear and turbid water and ensuring that the effluent meets the standards".
1. Comprehensive wastewater treatment system 3500m3/d, daily recycled water 600m³, discharge 2900m³/d;
2. Use anaerobic process to produce biogas and use the biogas as a by-product of steam;
3. Choose economical, reasonable and mature processing technology;
4. The entire system adopts PLC control to realize automatic operation and management, reducing labor intensity;
5. Under the premise of ensuring the treatment effect, reduce the investment and operation costs as much as possible.
2. Process flow and process description
Figure 1 Wastewater treatment flow chart
1. Description of wastewater treatment process
01Regulating pool
The purpose is to prevent large fluctuations in water quality, water quantity and pH value, so that the structures and pipes in the treatment system are not impacted by peak wastewater flow or concentration changes, and to maintain the stable operation of the subsequent treatment system. An aeration system is installed in the pool for aeration and mixing to even out the water quality.
02Sedimentation Tank
The sedimentation tank adopts radial flow sedimentation method. Wastewater enters the tank body from the water inlet pipe in the center of the tank and flows slowly toward the periphery of the tank in the radial direction.
The suspended solids settle during the flow and enter the sludge hopper along the slope of the pool bottom, and the clarified water overflows from the pool perimeter to the canal.
A centrally driven scraper is used to collect sludge in the pool. The scraper blade scrapes the sludge that sinks to the bottom of the pool to the sludge hopper in the center of the pool, and then pumps it into the sludge thickening tank.
Radial flow sedimentation tank has the following advantages:
a. Mechanical mud discharge is adopted, the equipment is simpler and the mud discharge is smoother;
b. The method of central water inlet and peripheral water outlet causes less agitation in the water body and is more conducive to the removal of suspended solids;
03High -efficiency anaerobic reactor
The high-efficiency anaerobic reactor is a new generation of high-efficiency anaerobic reactor. Wastewater flows from bottom to top in the reactor, pollutants are adsorbed and degraded by bacteria, and purified water flows out from the top of the reactor.
04Hydrolysis Acidification Tank
The hydrolysis acidification tank is a process in which various complex organic matter in wastewater can be decomposed and converted into small molecular organic matter and other substances.
Heterotrophic bacteria in the hydrolysis acidification tank hydrolyzes suspended pollutants such as starch, fiber, carbohydrates and soluble organic matter in the sewage into organic acids, decomposes large molecular organic matter into small molecular organic matter, and converts insoluble organic matter into soluble organic matter. When these products of anoxic hydrolysis enter the aerobic tank for aerobic treatment, the biodegradability efficiency of the sewage can be improved.
05Activated sludge tank
After the wastewater passes through the hydrolysis acidification tank, it is evenly mixed and aerated in the activated sludge. The microorganisms in the water use dissolved oxygen to decompose most of the organic matter into CO2 and H2O through metabolism, effectively reducing the COD effluent value.
06 MBR Reactor
Membrane bioreactor can maximize the function of biological reaction through membrane separation technology. MBR has many technical features, compared with traditional treatment technology, including:
1. The processing system occupies a small area.
2. The system has a simple structure, convenient operation and management, and easy maintenance.
3. The structure is simple and maintenance is very simple. Daily management only requires checking the filter pressure and cleaning the aeration pipe. Cleaning the aeration pipe can also be done by simply opening and closing the valve, which is very simple.
4. High durability and long service life.
2. Wastewater discharge and reuse standards
01Wastewater Discharge Standards
02Water Reuse Standards
Shanqing Environment uses the above process to make the treated wastewater meet the discharge standards and be reused. The above case is for reference only. If you have other wastewater treatment related needs, please feel free to contact us for consultation. Shanqing Environment can provide you with more mature, reliable, efficient, energy-saving, low investment, low operating cost, and low secondary pollution water treatment processes and equipment.
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