Industry News

Introducing a simple process for domestic wastewater treatment

This document takes the treatment of domestic sewage as an example. The treatment of domestic sewage is roughly divided into primary treatment, secondary treatment, tertiary treatment and sludge treatment. The following is a detailed analysis of the entire sewage treatment process. The primary treatment system, also known as the pretreatment or physical treatment system, mainly removes coarse sand grains and suspended solid pollutants from sewage. After primary treatment, the BOD can generally be removed by about 30%, and the removal rate of suspended solids is about 70%-80%; it does not meet the discharge standards.

Several methods for treating domestic sewage

Modern wastewater treatment technologies are divided into three stages according to the degree of treatment. In the primary treatment of wastewater, physical methods such as screening and sedimentation should be used to remove insoluble suspended solids and floating matter from the wastewater. Secondary treatment of wastewater mainly uses biological treatment agents, that is, through the metabolic transformation process of microorganisms, various complex organic substances in wastewater are oxidized and degraded into simple substances. Biological treatment has certain requirements for wastewater quality, water temperature, dissolved oxygen, and pH value. Based on the primary and secondary treatment, physical and chemical processes such as coagulation, filtration, ion exchange, and reverse osmosis are used to remove pollutants from the wastewater.

What are the methods for treating rural domestic sewage?

Livestock wastewater purification biogas pool treatment technology can adapt to rural domestic sewage treatment, with a thrifty treatment method, able to embody the combination of environmental and social benefits. The biogas pool produces biogas after anaerobic fermentation of organic matter in wastewater. Humans use biogas for cooking, power generation, and recycling.

When should I clean the mbr tablet film? What should I pay attention to when cleaning it?

When should MBR flat sheet membranes be cleaned? Chemical cleaning is required when the transmembrane pressure difference is too high. This increase in pressure may be due to fouling on the surface of the MBR flat sheet membrane. The chemical cleaning cycle for MBR flat sheet membranes is as follows: (1) When the pressure difference between the membranes increases by 5 kPa every 6 months or increases at the same filtration rate compared to the initial operation.

Industrial wastewater treatment equipment: Analysis of the main characteristics of chemical wastewater

Industrial wastewater treatment equipment: Analysis of the main characteristics of chemical wastewater 1. Chemical wastewater has a large discharge volume and complex composition. The raw materials for the reaction are often solvents or compounds with a cyclic structure, which increases the difficulty of wastewater treatment; 2. The wastewater contains a large number of pollutants, mainly due to incomplete reaction of raw materials and the use of a large number of solvents in raw materials or production. 3. It contains many toxic and harmful substances, high concentration of organic matter, high salt content, high chroma, high content of refractory compounds, many biodegradable substances, poor biodegradability, and high treatment difficulty. Fine chemical wastewater contains many organic pollutants that are toxic and harmful to microorganisms, such as halogenated compounds, nitro compounds, dispersants, or surfactants with bactericidal effects.

The National Development and Reform Commission and other departments have issued the "14th Five-Year Plan" for the Construction of a Water-Saving Society

According to a November 9th announcement from the National Development and Reform Commission (NDRC), to comprehensively promote the construction of a water-saving society, the NDRC, Ministry of Water Resources, Ministry of Housing and Urban-Rural Development, Ministry of Industry and Information Technology, and Ministry of Agriculture and Rural Affairs recently jointly issued the "14th Five-Year Plan for the Construction of a Water-Saving Society" (NDRC Circular [2021] No. 1516, hereinafter referred to as the "Plan").

Overview of Water Environment Governance Solutions

Water environment governance involves many aspects and affects every household. It is increasingly becoming a focus of social attention and a livelihood project that can only be done well, not poorly.

MBR tablet film advantages revealed

MBR plate membrane technology not only plays a role in wastewater treatment, but also recycles water resources and improves the quality of urban living environment. MBR plate membrane is a form of MBR membrane, because its appearance is similar to a plate, so it is called MBR plate membrane. It has good water permeability and a support layer with high mechanical strength, so membrane breakage and loss of pollutants are rare.