How to dispose of the water after the cabbage has rotted to meet the discharge standard

Reason for needing treatment: Fresh cabbage contains a lot of nitrate, nitrate itself is non-toxic, but after cabbage rots or is left for a long time after cooking, under the decomposition of bacteria, nitrate will be reduced to nitrate and nitrite. Nitrite enters the stomach.

Intestines. It can quickly enter the blood after absorption, which can make the blood lose its ability to carry oxygen, make people lack oxygen, and cause headache and nausea. Vomiting.

Abdominal distension. The heart beats fast, and in severe cases it is going to cramp. Comatose and even life-threatening.

Treatment method: A2O process is used.

Treatment steps: 1. Before the sewage enters the primary sedimentation tank, the equipment grid blocks a part of the large particles and vegetable leaves. The sewage enters the primary sedimentation tank and precipitates a part of the suspended solids through gravity.

2. After preliminary treatment, the basic treatment of impurities in the sewage is completed. When the sewage enters the reaction tank, the sewage contains nitrate, nitrite and other organic substances, which decompose harmful substances through three stages of anaerobic, anoxic and aerobic reactions.

3. After treatment, the sewage is separated from the sludge by sludge centrifuge, the quality of sludge and water is not the same, in the high-speed rotation, the water will stay at the back end of the centrifuge, and the sludge will stay in the front section. The sludge is sent out of the centrifuge by spiral rotation, and the sewage enters the disinfection tank through the lower flow tank.

4. Disinfection treatment Add chlorine dioxide to the disinfection pool, carry out final disinfection, and then discharge it to the municipal pipeline.

1. Adjust the pH and other conditions of wastewater, and detect COD, ammonia nitrogen, total phosphorus and other indicators.

2. The adjusted water enters the anaerobic pool.

3. The water after fermentation in the anaerobic tank enters the aeration tank.

4. Decolorization by activated carbon.

5. Discharge up to standard.

Add 99% sodium hydroxide and neutralize it.

There are two ways, one is to discharge to the municipal sewage treatment plant for advanced treatment after septic tank pretreatment, and then discharge to the river or reuse;

Another way is to build a small sewage treatment station, which will be discharged into the river or reused after treatment;

It mainly depends on the location of your community, if it is an urban area, it is more appropriate to discharge it directly to the urban sewage treatment plant, if it is a suburb, the cost of self-built sewage treatment station will be lower. The following figure is the process diagram of the self-built sewage treatment station:

The most direct and effective treatment method of paint spray wastewater is to use paint mist coagulant AB agent products for environmental protection treatment, only in this way can the paint and pollutants in the coating wastewater be separated, and the use of paint mist coagulant can control the turbidity of water quality, impurity content, odor, COD value, etc., and the paint mist coagulant is within a certain range to meet the requirements of environmental protection, and there is no need to change water for a long time to achieve zero discharge.

The raw material of paint mist coagulant A is composed of non-polar polymers, and the AB agent product can be combined with hydrophobic oil, and its composition is a non-solvent-based organic compound, which is suitable for adding in the paint circulating water system, and can decompose and remove the organic pollutants in the viscous paint circulating water of the paint. Maintain clear water quality and control COD.

After adding paint mist coagulant B, the paint residue can be condensed and floated, which is convenient for collection. Paint residue can be removed with a fishing net to achieve zero emissions. The water quality purified by paint mist coagulant is clear, transparent, colorless, tasteless, pH value between 7-8, COD <500mg L, which meets the industrial wastewater discharge standard and can be directly discharged; The purified water can be recycled, and the painted circulating water is replaced every 6 months to reduce the cost of paint wastewater treatment; The floating rate of paint residue reaches more than 95%, and when it is not determined how much paint mist coagulant needs to be added, first do a small test in the laboratory, and our company can provide free samples of paint mist coagulant AB agent.

Depending on the situation, the urban sewage treatment plant, according to the local discharge standards, discharged into the river, etc., is generally a class A standard, there is also a class B enterprise discharge, must implement the national comprehensive discharge standards, or local discharge standards There are many rivers that are not allowed to build new sewage outlets, even if they meet the standards, they cannot be discharged directly, and they have to go through the old sewage pipes.

Reaching the first-class standard only shows from the technical indicators that the direct discharge of water quality indicators after wastewater treatment will not have a significant impact on the environment. However, whether it can be discharged depends on the local environmental quality requirements and environmental capacity, and specifically according to the environmental impact assessment. For example, if the receiving water body is a drinking water source, it cannot be discharged if it meets the first-class standard.

It's not that simple, depending on the situation.

Municipal sewage treatment plants, according to local discharge standards, discharge into rivers, etc., are generally Class A standards, and there are also Class B standards.

Enterprises must implement the national comprehensive discharge standards for sewage discharge, or local discharge standards, and many rivers are not allowed to build new sewage outlets, even if they meet the standards, they cannot be discharged directly, and they have to go through the old sewage pipes.

The general raw materials for acid and alkali wastewater treatment are:

1) Priority should be given to high-concentration acid-alkali wastewater.

DAO** utilization.

According to the water quality, water quantity and different process requirements, plant or regional scheduling, as much as possible reuse: if it is difficult to reuse, or the concentration is low, the amount of water is large, the concentrated wastewater treatment method can be used **acid and alkali.

2) Low-concentration acid and alkali wastewater, such as the cleaning water of the pickling tank and the rinsing water of the alkali washing tank, should be neutralized and the wastewater treatment should be carried out.

For neutralization treatment, the principle of wastewater treatment with waste treatment should be considered first. For example, acid and alkali wastewater neutralize each other or use waste alkali (slag) to neutralize acidic wastewater, and use waste acid to neutralize alkaline wastewater. In the absence of these conditions, neutralizer wastewater treatment can be used.

Domestic sewage generally meets the discharge standards!