Combined treatment process for manioc producing effluent

A technology for the production of wastewater and tapioca starch, which is applied in the fields of flocculation/sedimentation water/sewage treatment, flotation water/sewage treatment, neutralized water/sewage treatment, etc. question

Inactive Publication Date: 2006-05-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only needs to occupy a large area of ​​land, but the removal rate of pollutants is low, and the nearby air is seriously polluted due to the corruption and odor of protein in the wastewater.

Method used

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  • Combined treatment process for manioc producing effluent
  • Combined treatment process for manioc producing effluent
  • Combined treatment process for manioc producing effluent

Examples

Experimental program
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Embodiment Construction

[0039] The cassava cleaning water in cassava starch production enters the primary sedimentation tank to remove most of the mud and sand, and then is recycled for cassava cleaning. When the COD concentration in the wastewater is close to 1000mg / L, it enters the homogeneous adjustment tank.

[0040] Tapioca starch primary washing separation wastewater and modified starch production wastewater directly enter the regulating tank.

[0041] Secondary washing and separation of cassava starch wastewater is firstly pretreated by an air flotation tank to separate and remove residual starch particles in the wastewater, 60% of COD in the wastewater is removed, and the effluent enters the regulating tank.

[0042] Alcohol production wastewater is sedimented to remove slag, and the supernatant in the sedimentation tank is taken for treatment, so as to make the SS value of the wastewater less than 100mg / L. According to the general practice of alcohol production workshops, the cassava residue...

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Abstract

The present invention discloses combined treatment process for manioc producing effluent. The combined treatment process includes the following steps: 1. pre-treating partial effluent, including manioc material washing water, primary starch separating washing water, secondary starch separating washing water, denatured starch effluent and manioc alcohol producing effluent, while making the rest enter to the regulating tank directly; 2. regulating pH value of homogenized effluent, treating in anaerobic biological treating system to degrade COD and recover marsh gas; 3. settling and treating in aerobic bioreaction pond; and 4. exhausting treated water with COD content below 100 mg / L. The present invention has simple technological process, high treating effect, low comprehensive cost and recovery of biomass resource.

Description

technical field [0001] The invention relates to a waste water treatment process, which is mainly used for treating high-concentration organic waste water produced in the cassava starch production process. Background technique [0002] Tapioca starch production wastewater is rich in protein and amino acids. The COD concentration in tapioca starch separation wastewater can be as high as 10000mg / L, but it has good biodegradability (B / C>0.5). Due to the short production cycle of cassava starch, large amount of wastewater, high concentration of organic pollutants in wastewater and easy acidification, the treatment of cassava starch production wastewater is still a very difficult problem. At present, domestic and foreign tapioca starch production wastewater treatment methods include: [0003] 1) Chemical flocculation precipitation method [0004] The chemical flocculation and sedimentation method is used to treat cassava starch wastewater, which has a good removal effect on C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/24C02F1/52C02F1/66C02F3/30
Inventor 刘康怀郑玉王燕舞梁建奎伍婵翠
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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