Process for treating organic sewage by three section method and its apparatus

Abstract

A three-segment method and system for treating organic sewage is disclosed. Its system is composed of the phase state regulating unit consisting of front chamber and anoxic back chamber, the anaerobic reaction unit consisting of stage-one and-two anaerobic reactor, and membrane bioreactor. Its method includes such steps as pretreating, anoxic reaction, anaerobic reaction, membrane bioreaction, and returning the residal sewage back to the anoxic reaction.

Description

1. Technical field [0001] The invention relates to a three-stage organic sewage treatment method and a device thereof. 2. Background technology [0002] Water is not only the source of life, but also an indispensable resource for people's production and life. my country is not only an energy-deficient country, but also a water-poor country in the world. The per capita occupancy is only a quarter of the world's per capita occupancy, and it has been listed as one of the 13 water-poor areas by the United Nations. What's more serious is that a large amount of urban domestic sewage and organic wastewater from industry and aquaculture have polluted the water body very seriously. The pollution mass load ratio of COD has reached 99.5%. Water pollution has affected the sea area, and the "red tide" in the coastal waters and the "water bloom" caused by the eutrophication in the inner lake have made our country pay a high and heavy price. For this reason, the country loses more than...

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Problems solved by technology

For this reason, the country loses more than 30 billion yuan every year. What is more serious is that the long-term use of sewage for agricultural irrigation and breeding not only reduces production, but also causes a large number of pollutants to move into the human body through food, causing many diseases to occur. At the same time, hundreds of billions of funds are spent every year to build Urban sewage treatment plant

However, the current process technology of urban sewage plants not only consumes a lot of energy, has no recycled materials, but also discharges secondary pollutants such as waste gas, waste residue and sludge.

[0003] At present, there are many organic sewage treatment technologies and processes, and the chemical treatment method is generally not used due to high investment and operating costs and secondary pollutants.

Biological treatment is mainly used, among which the land and pond method and the constructed wetland method are restricted due to large land occupation, and are generally used less. The activated sludge method, biological contact oxidation method, and biofilm method are widely used and representative. , biological filter method, biological turntable method, anaerobic digestion method and other technical processes, but they cannot fully recover the water and the biomass in it, all of which are treated for pollution control. The process is single, not only high energy consumption, large investment, but also There are secondary pollutants such as waste residue and waste gas, which is a huge waste of waste water resources

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