Comprehensive processing device for wastewater and waste liquid

Abstract

The invention discloses a comprehensive processing device for wastewater and waste liquid. The comprehensive processing device at least comprises a wastewater pre-processing pool, a medium and low pressure reverse osmosis membrane processing tank, a waste liquid electrochemical pre-processing pool, a concentration regulating tank, an anaerobic haloduric biochemical pool, an aerobic haloduric biochemical pool and an electrochemical processing tank, wherein the wastewater outlet of the wastewater pre-processing pool is connected with the inlet of the medium and low pressure reverse osmosis membrane processing tank; the inlet of the waste liquid electrochemical pre-processing pool is connected with a municipal or industrial waste liquid pipeline and the wastewater outlet of the medium and low pressure reverse osmosis membrane processing tank; the wastewater outlet of the waste liquid electrochemical pre-processing pool is connected with the inlet of the concentration regulating tank; the inlet of the anaerobic haloduric biochemical pool is connected with the outlet of the concentration regulating tank; the outlet of the anaerobic haloduric biochemical pool is connected with the inlet of the aerobic haloduric biochemical pool; and the outlet of the aerobic haloduric biochemical pool is connected with the inlet of the electrochemical processing tank. The comprehensive processing device for wastewater and waste liquid, which is provided by the invention, is characterized in that water sources, heat sources and energy are comprehensively utilized to process wastewater and waste liquid with low cost and high efficiency.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a comprehensive treatment device for waste water and liquid. Background technique [0002] Wastewater and waste liquid come from people's production and life, and are usually divided into low-concentration waste water that is easier to treat and high-concentration waste liquid that is difficult to treat. The former usually has a large amount of water, low pollutant content, and is economical for reuse; the latter is usually The amount of water is small and the content of pollutants is high, so it is basically impossible to reuse. [0003] Wastewater is divided into domestic sewage treated centrally by urban domestic sewage treatment plants, or comprehensive industrial wastewater from production processes treated by industrial sewage treatment plants. Comprehensive industrial wastewater comes from such sources as: oil extraction, oil refining, petrochemical, electric power, metallurgy,...

AI Technical Summary

Problems solved by technology

The three-level treatment process based on the first-level and second-level treatment processes is commonly used now. The main difficulty of the three-level treatment process is denitrification, because the denitrification in ordinary biochemical processes is achieved through nitrification-denitrification, and the nitrification process requires It consumes a lot of oxygen to oxidize ammoniacal nitrogen in wastewater to nitrate nitrogen through nitrifying bacteria, and then reduces nitrate nitrogen to nitrogen gas through denitrifying bacteria in anaerobic state, because a large amount of carbon source is consumed in aerobic state , and in the state of denitrification, it is often faced with carbon source and insufficient alkalinity, which cannot provide enough nutrients for denitrifying bacteria to reduce nitrogen. Most of the three-stage biochemical processes need to add carbon source (usually methanol) and alkalinity to supplement

This contradiction makes the tertiary treatment process long, inefficient, and consumes a lot of energy

[0004] The three-level standard discharge water can be reused. As reclaimed water, it can be directly used for greening, spraying, and cooling water. It can also be purified into high-grade water by conventional membrane technology for higher-grade production and domestic water. However, conventional membrane technology is faced with One contradiction is that the waste water produced by purification has a large volume and high concentration, which often becomes another source of pollution, and the investment required to control this part of pollution is large, offsetting the economic benefits brought by the reuse of water

At present, the commonly used processes are expensive processes such as evaporation, incineration, wet oxidation, etc., which require high temperature and high pressure and consume a lot of energy to degrade

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