Deep disposal process for biochemical tail water of chemical industry

An advanced treatment and biochemical technology, applied in biological water/sewage treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of large amount of adsorbent, high operating cost, secondary pollution, etc. The effect of adsorption removal rate, fast settling performance and not easy to run off

Inactive Publication Date: 2018-05-29
GUANGZHOU HOMELAND ENVIRONMENTAL ENG
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Problems solved by technology

[0007] The above-mentioned coagulation-sedimentation method has low operating costs, but mainly reduces the turbidity of wastewater, and has poor treatment effects on COD and ammonia nitrogen; the adsorption method can achieve better results, but there are large amounts of adsorbents, high costs, and secondary pollution. and other issues; advanced oxidation technology has high removal efficiency for various refractory organic substances in wastewater, but the system operation is complicated, the operation cost is high, and secondary pollution is easy to occur

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  • Deep disposal process for biochemical tail water of chemical industry

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Embodiment 1

[0032] The treated biochemical tail water quality of a coking plant is COD Cr =140~200mg / L, SS≤150mg / L, TN=18~45mg / L, NH 3 -N=10-25mg / L, TP=2.5~4.5mg / L, chromaticity 80-100 times, pH=7.0~8.5.

[0033] The specific steps for treating the above-mentioned water quality wastewater by using the wastewater treatment process provided by the embodiment of the present invention are as follows: first add activated sludge from a sewage plant to the pH adjustment tank according to 8% of the amount of wastewater, and the air-to-water ratio is 2:1. Aeration intensity: Aerate for 60 hours, add a small amount of sodium bicarbonate and sodium hydroxide to adjust the pH to about 7.0. Wastewater containing activated sludge is pumped from the pH adjustment tank into the water inlet tank of the PAC reactor, and then PAC powder is added to the reaction zone of the PAC reactor, with a dosage of 22-25kg / m 3 For waste water, aerate for 6 hours according to the aeration intensity of the air-water rat...

Embodiment 2

[0035] The quality of the biochemical tail water treated by a fine chemical enterprise is COD Cr =170~200mg / L, SS≤120mg / L, TN=20~38mg / L, NH 3 -N=10~20mg / L, TP=2.0~4.5mg / L, chromaticity 60~80 times, pH=6.0~8.0.

[0036] The specific steps for treating the above-mentioned water quality wastewater by using the wastewater treatment process provided by the embodiment of the present invention are as follows: first add activated sludge from a sewage plant to the pH adjustment tank according to 6% of the wastewater amount, and the air-water ratio is 2:1. Aeration intensity: Aerate for 48 hours, add a small amount of sodium bicarbonate and sodium hydroxide to adjust the pH value to about 7.0. Wastewater containing activated sludge is pumped from the pH adjustment tank into the water inlet tank of the PAC reactor, and then PAC powder is added to the reaction zone of the PAC reactor, with a dosage of 20-23kg / m 3For wastewater, aerate for 5 hours at an aeration intensity of 2.5:1. The r...

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Abstract

The invention relates to the field of deep disposal process for biochemical tail water of the chemical industry, in particular to a deep disposal process for biochemical tail water of the chemical industry. A disposal system includes a pH adjusting pool, a PAC reactor and a membrane separating device which are connected sequentially. Under aeration condition, through the double function of PAC adsorption and micro-biological degradation, removal of refractory organics in the biochemical tail water of the chemical industry is achieved, and fast regeneration and recycling of PAC are achieved byusing dominant bacterial groups to degrade pollutants; the regeneration period is short, the load impact resisting capability is great, operation management is convenient, the running expense is low,and meanwhile a certain detoxification function is achieved; the sludge settling performance is excellent, basically no residual sludge is generated, and discharged water can reach the first-level A emission standard of the pollutant emission standard for urban sewage treatment plants (GB18918-2002).

Description

technical field [0001] The invention relates to the field of chemical and biochemical tail water treatment, and more specifically relates to a process for advanced treatment of chemical and biochemical tail water. Background technique [0002] At present, the shortage of water resources and the discharge of pollutants have become restrictive factors for the development of the chemical industry (coal chemical industry, petrochemical industry, surface treatment, fine chemical industry, etc.). With the increasingly stringent discharge standards and the increasing sewage charges, The reuse of chemical and biochemical tail water has gradually attracted attention. However, due to the large amount of water in chemical and biochemical tail water, the complex treatment process and inconvenient operation and management due to the presence of macromolecular, stable, and refractory long-carbon-chain organic substances, have affected the popularization and application of chemical and bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/442C02F1/444C02F1/5236C02F1/66C02F3/12C02F9/00C02F2001/007C02F2101/30
Inventor 潘凤开潘振鹏练文标
Owner GUANGZHOU HOMELAND ENVIRONMENTAL ENG
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