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Method of pretreating acidic CMC (carboxymethylcellulose) condensate by UBF process

A technology of carboxymethyl cellulose and condensate, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as no research reports on acidic CMC condensate

Active Publication Date: 2015-04-01
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no research report on the treatment of acidic CMC condensate

Method used

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  • Method of pretreating acidic CMC (carboxymethylcellulose) condensate by UBF process
  • Method of pretreating acidic CMC (carboxymethylcellulose) condensate by UBF process
  • Method of pretreating acidic CMC (carboxymethylcellulose) condensate by UBF process

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Embodiment Construction

[0024] The acid CMC condensate treatment process of the present invention mainly uses the anaerobic purification effect of the biofilm in the UBF reactor to achieve the purpose of removing organic matter, and the process flow chart is as follows figure 1 shown. The acidic CMC condensate enters the regulating sedimentation tank 1 for homogenization and precipitation, and then flows into the neutralization tank 2, where 15% industrial Na is added to the tank. 2 CO 3 The alkaline solution of the solution can stabilize the pH value of the wastewater in the neutralization tank between 6.5 and 7.5. At the same time, a 10% mass ratio of agricultural compound fertilizer solution is added dropwise. The wastewater stirred by the electric submersible agitator at the bottom of the neutralization tank is made The pump 3 is injected into the bottom of the UBF reactor 4 , the waste water is anaerobic purified by the biofilm on the carrier in the reactor and then enters the advanced sewage t...

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Abstract

The invention discloses a method of pretreating acidic CMC condensate by the UBF process. Acidic CMC condensate enters an adjusting settling pond first for water volume and water quality adjustment and then enters a neutralizing pond; Na2CO3 solution is added into the neutralizing pond to stabilize pH value of waste water in the range of 6.5-7.5. The waste water from the neutralizing pond is injected into the bottom of a UBF reactor by an anticorrosion chemical pump; the waste water purified anaerobically by biofilm on filler inside the reactor enters a waste water deep processing unit from the top; methane gas produced by anaerobism is collected to a methane gas cabinet. The method has the advantages that treatment efficiency is high, energy consumption is low and operational cost is low.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method for pretreating acid carboxymethyl cellulose (CMC) condensate by using a UBF process. Background technique [0002] Carboxyl Methyl Cellulose (CMC for short), also known as sodium carboxymethyl cellulose, is a substance with ether structure produced by chemical reaction modification of natural polymer material cellulose. MSG". Widely used in food, medicine, toothpaste, textile and other industries, with large market sales and good benefits. However, at present, the process of producing sodium carboxymethyl cellulose using refined cotton linters, chloroacetic acid, ethanol, etc. as raw materials generally has the problems of large consumption of raw materials and low utilization rate (especially the utilization of etherifying agent chloroacetic acid). The rate is very low, only 50-60% are utilized), and the unreacted raw materials also enter the productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 张文艺刘芳李文昱冯国勇吴凌云
Owner CHANGZHOU UNIV
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