Efficient and deep treatment process for high-concentration waste water in natural gas industry
A high-concentration wastewater and advanced treatment technology, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of large fluctuations in effluent water quality, low biochemical treatment effect, and dilution water consumption Large and other problems, to achieve the effect of low investment cost, easy solid-liquid separation, and low labor intensity
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[0037] A high-efficiency advanced treatment process for high-concentration wastewater in the natural gas industry, comprising the following steps:
[0038] Step 1. Physical and chemical pretreatment:
[0039] (1) After the high-concentration wastewater (CODcr≈10000mg / l) is routinely degreased, add hydrogen peroxide at 0.5-2.0% of the wastewater volume, and react in a fully mixed-flow batch reactor at room temperature for 4-10 hours, preferably 8 Hour;
[0040] (2) Add the catalyst according to 0.5-2.0% of the waste water volume. The catalyst can be iron salt, copper salt or manganese salt, etc., and the iron salt is the best, and the catalytic oxidation reaction is carried out. The reaction time is 4-6 hours, and 4 hours is the best good;
[0041] (3) Then add ferrous sulfate with 1-2% of waste water, adjust the pH value to 8-9, add polyacrylamide with 0.002-0.005% of waste water, carry out flocculation reaction, and then precipitate and separate for 1-2 hours ;
[0042] S...
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