Small buried sewage treatment equipment technology

Small buried sewage treatment equipment technology

The buried sewage treatment equipment includes: inlet pipe, outlet pipe, inspection well, and cylinder body. The cylinder body is made of 12mm thick fiberglass and includes four water tanks: septic control tank, hydrolysis tank, contact oxidation tank, and sedimentation tank. Each water tank contains an inspection well; A filter is installed at the lifting pump of the manure regulation tank, and a sludge reflux pump is installed in the sedimentation tank. The equipment is all underwater and has no noise.Underground sewage treatment equipmentUsed to solve the problem of small water sewage treatment, combining septic tanks and sewage treatment tanks together without the need for separate septic tanks; The advantages of this device are: practical and economical, corrosion-resistant and durable, simple installation process, easy operation, and good sewage treatment effect.

advantage

Mature technology, treatment, suitable for rural sewage with large fluctuations in water quality and quantity.

The installation is not affected by terrain, has a short and fast time, and the fully buried installation form can adapt to the low-temperature operation in northern winter. The upper part of the station can be greened or hardened for a beautiful and elegant appearance.

The water quality meets the standard, and the treated clean water is not discharged, which can maintain the water volume around the residential area and can be directly used for irrigation.

Built up: The equipment has simple structure, small area, and low price.

Small buried sewage treatment equipment technologyProcess description:

1. Water collection regulation sedimentation tank: designed for the normal operation of subsequent process equipment, and also for the stability of water quality and quantity. Design a dwell time of 24 hours.

2. Coagulation mixing air flotation integrated machine: The purpose is to use chemical coagulation to flocculate suspended solids in water, and then use bubbles to support the flocculent body to the liquid level for the scraper to scrape into the sludge tank and then flow into the sludge concentration tank.

3. Hydrolysis acidification tank: Tank function: When substances in water have complex structures, anaerobic bacteria use H and - OH ionized by H2O to open C-C in the substance molecules. One end adds H and the other end adds - OH, which can hydrolyze long chains into short chains, branch chains into straight chains, and circular structures into straight or branched chains, improving the biodegradability of wastewater. When SS is high in water, anaerobic bacteria capture it through the extracellular mucosa, hydrolyze it into molecular fragments with external enzymes, and then enter the cell for metabolism. Non metabolism can make SS a soluble substance, and the effluent becomes clear. During this period, anaerobic bacteria utilized the energy of the valence bond of substances that hydrolyze and break bonds to complete their life activities.

The acidification bacteria in the anoxic tank sludge degrade the large molecular substances in the wastewater into small molecular substances, which is beneficial for subsequent aerobic treatment. In addition, the water in the middle of the aerobic tank is refluxed to the anoxic tank for denitrification to achieve simultaneous denitrification and phosphorus removal. Intermittent aeration stirring is adopted, with a residence time of 4 hours.

4. Main functions:

The biological contact oxidation tank is a process that mainly uses biofilm to purify sewage. Its characteristic is that all the fillers for microorganisms to fix in the tank are submerged in water. The tank uses air blowing aeration to provide the oxygen required for microbial oxidation substances and plays a stirring and mixing role. The sewage in the tank also has a certain concentration of suspended biomass, thus achieving the purification effect on the wastewater This process combines the characteristics of both activated sludge process and biofilm process. Microorganisms in the pool degrade substances in wastewater under aerobic conditions, thereby achieving the goal of reducing BOD5 and CODcr. Design a dwell time of 24 hours.

5. Secondary sedimentation tank: The purpose is to return the sewage from the aerobic tank to the hydrolysis acidification tank for nitrification and denitrification treatment of nitrogen and phosphorus.

6. Filter: The purpose is to add quartz sand packing or activated carbon packing to the tank to remove SS.

Underground sewage treatment steps:

1) Filtering: Sewage enters the sedimentation tank from the production workshop, and the sludge in the sewage is filtered out using the sedimentation in the sedimentation tank. The filtered sludge in the sewage enters the fine grid tank through the first water pipeline, and the large solid debris and some suspended solids in the sewage are filtered out through the fine grid inside the grid tank;

2) Water quality and quantity regulation: The filtered sewage from step 1 is introduced into the regulating tank for water quality and quantity regulation;

3) Hydrolysis treatment: The regulated sewage is introduced into the hydrolysis tank through the third water pipeline. The sewage undergoes hydrolysis and acidification in the aerobic hydrolysis tank. Under the action of aerobic microorganisms, insoluble macromolecular organic matter is hydrolyzed into soluble organic matter to improve the biodegradability of the sewage quality. The sludge settled by hydrolysis treatment enters the sludge tank through the sludge sub pipe for sludge treatment.

4) Contact oxidation biodegradation: The regulated sewage enters the contact oxidation tank and is oxygenated inside the tank through the jet injector to increase the concentration of concentrated dissolved oxygen in the tank; The sewage flows through the semi soft composite biological packing material and comes into full contact with the biofilm on the semi soft composite biological packing material. The microorganisms on the biofilm biodegrade the dissolved organic matter in the sewage;

5) One solid-liquid separation: The sewage that has undergone biodegradation enters the initial sedimentation tank for sedimentation, and the biodegradable sewage settles to form biological sludge. The solid sludge enters the sludge tank through the sludge sub pipe for sludge treatment.

6) Removal of organic matter and chromaticity: The wastewater treated by the above precipitation is introduced into the biochar tank through the sixth water pipeline. Microorganisms attach to the surface of the activated carbon layer, regenerating the adsorption capacity of the activated carbon and oxidizing and decomposing difficult to decompose organic matter.

7) Secondary solid-liquid separation: A portion of the oxidized and decomposed wastewater is sent through a sludge pipeline to the sludge tank for sludge treatment, and another portion of the sludge is sent through the sludge return pipe to the regulating tank to enhance the activity of microorganisms in the biological oxidation tank and increase their adaptability to wastewater.

Underground sewage treatmentmethod

Underground sewage treatmentThe equipment mainly solves the problem of organic matter in sewage, among which chemical oxygen demand is a comprehensive indicator of organic matter content. We only need to test the chemical oxygen demand in the water quality to see the water quality. The higher the chemical oxygen demand, the more severe the water pollution in the area. So far, the main methods are physical processing and biological processing.

Physical processing methods: Simply put, it is the use of physical and chemical reactions and principles to convert pollutants in wastewater into harmless substances, ultimately achieving the goal of wastewater purification, such as membrane separation and chemical oxidation methods. Biological treatment methods: Simply put, microorganisms are used to explain pollutants in water, which serve as their own energy and nutrients, while also achieving the goal of sewage purification. The main technologies used include anaerobic biological treatment and aerobic biological treatment.Underground sewage treatmentThis device is mainly designed for biological wastewater. It will solve the problems of poor domestic sewage treatment efficiency and unstable effluent quality. The device adopts AO filtration method, which effectively improves the sewage treatment effect.