Basic technology of domestic sewage treatment

Abstract

The invention discloses a domestic wastewater treatment fundamental technology. The domestic wastewater treatment fundamental technology comprises the steps of a first-grade wastewater treatment core process, middle assisting, a second-grade wastewater treatment core process and post assisting, controlling is conducted on the pH value based on all processing point water bodies in an overall process, and all parameters are set according to requirements of water inflow and outflow indexes. According to the domestic wastewater treatment fundamental technology, the advantages of ion separation medicament in practical application for an applicant can be fully guaranteed, and the representative advantages that the quantity of reagent (10-300 g per ton of water) is less, dilution is not needed for direct solid state dosage, buffering is not needed for wastewater real-time treatment (the reaction speed ranges from 3 min to 15 min), water content removal rate reaches up to over 80 percent, all national wastewater treatment emission standards can be accorded to and met, treated water is colorless, odorless and free of secondary harmful chemicals, and sludge produced through flocculation is low in moisture content (smaller than 35 percent), free of odor and adhesion and the like.

Description

technical field [0001] The invention relates to the field of sewage treatment processes and methods, in particular to a basic process and method for various domestic sewage treatment. Background technique [0002] In recent years, with the development of population and economy, environmental problems have become increasingly serious, and our government and people have attached great importance to them. Among them, the problem of water pollution has become a more important problem among many environmental problems. Water pollution causes soil pollution, which in turn causes air pollution and destroys the overall ecological environment. The main sources of water pollution are domestic sewage and industrial sewage, among which domestic sewage has a large amount of water, which brings great troubles to the lives of our people. my country is a populous country and is rapidly undergoing the process of urbanization. Domestic sewage treatment needs to meet the national standard GB1...

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Problems solved by technology

[0007] At present, domestic sewage treatment mainly uses three technical methods: physical method, chemical method and biological method; the physical method includes reverse osmosis membrane, etc., and the operation and maintenance cost of membrane technology is quite expensive; while the chemical method usually involves adding polymers to water. oxidants (iron oxide, etc.) and chemical flocculants (such as polyacrylamide (PAM) or polyaluminum chloride (PAC)); The shortcomings of standing for a long time, not being able to stir, producing secondary chemical hazardous substances and producing sludge with high water content inevitably have relatively large problems in the actual process and operation; for example, the flocculation speed is slow, the water buffer and reaction supporting facilities occupy The land area is large, the waste of water resources and land is relatively serious, and it causes secondary pollution to the water environment. The bigger problem is that the use of chemical flocculants will bring great trouble to the sludge treatment it produces. Electric energy drives the sludge filter press or centrifuge, and the sludge smells very smelly, and the moisture content of the treated sludge is still as high as 60% or more

Biochemical methods are currently widely used, especially in domestic sewage treatment. Its advantages are stability, effectiveness, and low operating costs, but its limitation is that it cannot treat waste water with high concentrations of organic matter and high salt and other poor biodegradability. It is difficult to domesticate and cultivate bacteria, and even some chemical wastewater can kill biochemically active bacteria

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