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Method for treating cellulose acetate butyrate production wastewater

A technology for acetic acid butyric acid and waste water production, which is applied in the fields of natural water body treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of large amount of sludge, complicated treatment process and high operating cost , to achieve the effect of reducing operating costs, good treatment effect and low operating costs

Inactive Publication Date: 2014-11-05
SICHUAN NITROCELLULOSE CORP +1
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing treatment process is complicated, the operating cost is high, and the amount of sludge is large

Method used

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  • Method for treating cellulose acetate butyrate production wastewater
  • Method for treating cellulose acetate butyrate production wastewater

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Embodiment 1

[0060] Taking the CAB production wastewater discharged from a factory as the treatment object, its parameters before treatment are: COD=18000~30000mg / L, BOD=14000~16000mg / L, B / C≈0.625, sulfate=4000~5000mg / L , pH=3.0~3.2.

[0061] Adopt device and method of the present invention to carry out combined treatment to above-mentioned CAB production waste water; Concrete treatment process is as follows:

[0062] 1) The wastewater from the production line flows into the regulating tank through the pipe network. In order to ensure the uniformity of the wastewater, aeration and stirring are carried out in the tank. The gas-water ratio of the stirring is 2:1. The liquid is returned to the adjustment pool, the purified gas has reached the standard, and it is discharged at high altitude. If the water temperature in the regulating pool is higher than 45°C, it will be lifted into the plate heat exchanger to cool down and then flow into the immobilized photosynthetic bacteria pool; if the wa...

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Abstract

The invention belongs to the field of wastewater treatment, and in particular relates to a method for treating cellulose acetate butyrate production wastewater. The method solves the technical problems of complex flow, high running cost and large sludge quantity of an existing treatment process. For solving the technical problems, the invention provides the method for treating the cellulose acetate butyrate production wastewater and the method comprises the steps of 1) treating the cellulose acetate butyrate production wastewater in an adjusting tank for 12-16h, and then treating the wastewater in an immobilized photosynthetic bacteria tank for 46-52h; 2) settling the effluent of the immobilized photosynthetic bacteria tank in a primary settling tank for 2-3h; 3) treating the supernate obtained after settling in the primary settling tank in an anaerobic tank for 20-28h; 4) treating the effluent coming from the anaerobic tank in an aerobic tank for 20-28h; 5) settling the effluent coming from the aerobic tank for 2-3h in a secondary settling tank, and then discharging the supernate reaching standards through a discharge opening or recycling the supernate. The method disclosed by the invention has the advantages of good treatment effect and low running cost, and can stably realize up-to-standard discharge.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment method for wastewater produced from cellulose acetate butyrate. technical background [0002] Cellulose acetate butyrate (CAB for short) can be used to make film bases, oil field and natural gas pipelines, peelable coatings, insulating varnishes and man-made fibers. A large amount of organic wastewater will be produced during the production process. The wastewater is acidic with pH=3.00-3.20, mainly organic acids such as acetic acid and butyric acid, COD=18000-30000mg / L, and sulfate=4000-5000mg / L. At present, there are two companies producing such products at home and abroad, Eastman Company of the United States and Shandong Zibo Longbang Chemical Co., Ltd. The production process and wastewater treatment process are in the confidential stage, and there is no information for reference. [0003] According to conventional treatment methods, acid-base neut...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
Inventor 袁从艳阳洪赵利斌姜鑫张玉桂武春艳夏晓玉李维水文传选谷振华王新
Owner SICHUAN NITROCELLULOSE CORP
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