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Treatment method of cellulose acetate butyrate production wastewater

A technology for acetic acid butyric acid and production wastewater, which is applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. problem, to achieve the effect of low operating cost, good treatment effect and reduced operating cost

Inactive Publication Date: 2016-07-06
SICHUAN NITROCELLULOSE CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Treatment method of cellulose acetate butyrate production wastewater
  • Treatment method of 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 treatment method for wastewater produced from cellulose acetate butyrate. The technical problem to be solved by the invention is that the existing treatment process is complex, the operation cost is high, and the amount of sludge is large. The solution of the present invention to solve the above-mentioned technical problems is to provide a treatment method for cellulose acetate butyrate production wastewater, comprising the following steps: 1) the cellulose acetate butyrate production wastewater first enters the adjustment tank for treatment for 12-16 hours, and then enters the immobilized photosynthesis Bacteria pool treatment for 46-52 hours; 2) The effluent from the immobilized photosynthetic bacteria pool enters the first settling tank for 2-3 hours; 3) The supernatant after the first settling tank settles flows into the anoxic tank for 20-28 hours; 4) The anoxic tank The treated effluent enters the aerobic tank for 20-28 hours; 5) The effluent treated in the aerobic tank enters the secondary sedimentation tank for 2-3 hours, and then the supernatant enters the discharge port for discharge or recycling. The method of the invention has good treatment effect, low operation cost, and can discharge up to the standard stably.

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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Patent Type & Authority Patents(China)
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冰文传选谷振华王新
Owner SICHUAN NITROCELLULOSE CORP
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