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Method for preparing biological flocculent by biological hydrogen-making waste liquid

A biological flocculant, biological hydrogen production technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low yield of biological flocculant, high production cost, and not reaching industrial application.

Inactive Publication Date: 2005-05-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the research on bio-flocculants in my country is still at the laboratory level and has not reached industrial application. The main reason is that the yield of bio-flocculants is too low and the production cost is too high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0004] Specific embodiment 1: The method for producing biological flocculant by using biological hydrogen production waste liquid in this embodiment is carried out according to the following steps: (1) Mix hydrogen production waste liquid and flocculant producing bacteria culture medium, and prepare a culture medium (2) transfer the domesticated strains to the waste liquid of biological hydrogen production, under the conditions of temperature 30°C and shaker speed 140r / min When the flocculation rate is greater than 50%, the acclimatization is over, and the bioflocculant is obtained. The biological hydrogen production waste liquid comes from the ethanol-type fermentation biological hydrogen production reactor of the Environmental Biotechnology Research Center of the Municipal Environmental Engineering College of Harbin Institute of Technology. The COD concentration is greater than 4000mg / L, and the pH value is 4.0-4.5. The biological hydrogen production waste liquid is composed...

specific Embodiment approach 2

[0005] Specific implementation mode two: this implementation mode is realized in this way:

[0006] 1. Compound flocculogen F 2 -F 6 domestication of:

[0007] a. Set up 9 groups of 250mL culture bottles, take a total of 150mL of the mixture of hydrogen production waste liquid and flocculant producing bacteria culture medium, put it into the culture bottle for sterilization, and the ratio of culture medium and hydrogen production waste liquid in the culture bottle is 9:1 respectively , 6.5:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:6.5 and 1:9, in order to make the acclimatization medium similar to the flocculation medium, keep the culture medium Contains a mass percentage of 0.2% K 2 HPO 4 and 0.08% KH 2 PO 4 , wherein the biological hydrogen production waste liquid is the effluent of the fermentative biological hydrogen production reactor of the Environmental Biotechnology Research Center of Harbin Institute of Technology, its COD is about 4000mg / L, and its pH value is 4.0-4.5. De...

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Abstract

A method for producing biological flocculent by biological hydrogen waste liquid is carried out by: 1) mixing producing fungus substratum of hydrogen waste liquid and flocculent to prepare culturing solution, and circulating acclimating flocculent by rich and poor nutritive alternating method; 2) transferring acclimated bacterial strain to biological hydrogen waste liquid at temperature 30deg.C, culturing at table speed 140r / min, and finishing acclimating to obtain biological flocculent when flocculating ratio>50%. It achieves high efficiency and safety, and more effective.

Description

Technical field: [0001] The invention relates to a method for preparing a biological flocculant, in particular to a method for preparing a biological flocculant by utilizing biological hydrogen production waste liquid. Background technique: [0002] The most widely used flocculants in water treatment are aluminum salt flocculants, iron salt flocculants and polyacrylamide polymer flocculants. These three types of flocculants will cause secondary pollution, and aluminum salt flocculants and polyacrylamide The use of polymer-like flocculants will bring potential harm to human health, which limits the application range and development of traditional flocculants. Due to the various defects of traditional flocculants, the development of a new flocculant that is safe, non-toxic, high in flocculation activity, and free from secondary pollution is of great practical significance to the improvement of the production process of material products, human health and environmental protecti...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 任南琪王爱杰董双石马放
Owner HARBIN INST OF TECH
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