domestic sewage

Main source: Domestic sewage mainly comes from the daily life process of residents, including household wastewater and wastewater discharged from various collective units and public utilities.

Main features: 1. High content of nitrogen, phosphorus, sulfur and other elements;

2. Organic compounds with high content, such as cellulose, starch, fat, carbohydrates, proteins, urea, etc., are prone to produce odorous substances under the action of anaerobic bacteria;

3. There are many microorganisms, such as various bacteria and pathogenic bacteria, which can easily infect people with various diseases;

4. Sewage contains a large amount of detergent.

Design principle: 1 Technically reasonable, while fully considering various existing standards and specifications, the safety and convenience of operation management, maintenance and inspection should also be fully taken into account. The processing technology should have sufficient technical rationality;

2. Economy: In project design, fully consider factors such as practicality, operability, and ease of maintenance of the project, and adhere to the principles of rationality, science, practicality, and cost savings for the owner to meet project requirements;

3. Compliance with safety standards:waste gas treatmentThe project should ensure that the emission standards in the overall design objectives are met, and sufficient measures should be taken to address the characteristics of dispersed point source changes in exhaust gas, ensuring stable compliance under harsh conditions.

4. Technical reliability: Based on engineering conditions and emission standards, carefully and reasonably select engineering design schemes, and try to adopt advanced technologies, new materials, and new layouts to reduce operating costs and ensure the long-term safe and reliable operation of the treatment system;

Process selection: pretreatment (grid, regulating tank, primary sedimentation tank, etc.)+sludge biochemistry (A/O, SBR, etc.)+post-treatment (MBR, multi-media filter, sterilizer, etc.)