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

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

Active Publication Date: 2014-01-08
CHANGZHOU UNIV
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  • Summary
  • 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 acidic CMC condensate treatment process of the present invention mainly utilizes the biofilm anaerobic purification effect in the UBF reactor to achieve the purpose of removing organic matter, and its process flow chart is as attached figure 1 shown. After the acidic CMC condensate enters the adjustment sedimentation tank 1 for homogenization and precipitation, it flows into the neutralization tank 2 by gravity, and industrial Na with a mass fraction of 15% is added to the tank. 2 CO 3 solution alkaline solution, so that the pH value of the wastewater in the neutralization pool is stable between 6.5-7.5, and at the same time, a 10% mass ratio of agricultural compound fertilizer solution is added dropwise, and the wastewater stirred by the electric submersible mixer at the bottom of the neutralization pool is produced by the corrosion-resistant chemical industry. The pump 3 is injected into the bottom of the UBF reactor 4, and the wastewater is anaerobically purifie...

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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 acidic carboxymethylcellulose (CMC) condensate by utilizing a UBF process. Background technique [0002] Carboxyl Methyl Cellulose (CMC for short), also known as sodium carboxymethyl cellulose, is a substance with an ether structure produced by chemical modification of natural polymer material cellulose. Monosodium glutamate". Widely used in food, medicine, toothpaste, textile and other industries, with large market sales and good benefits. However, at present, the domestic widely used process of producing sodium carboxymethyl cellulose with 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 rate is very low, only 50-60% is utilized), unreacted raw materials als...

Claims

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Application Information

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Patent Type & Authority Applications(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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