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Biological composite flocculant for waste water treatment and preparation method thereof

A composite flocculant and wastewater treatment technology, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of affecting the growth of bacteria and the reduction of flocculant activity, and achieve flocculation Good effect, significant effect, better flocculation effect Excellent effect

Inactive Publication Date: 2016-05-25
王盛梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the best temperature for flocculant production is between 25-35°C. If the temperature is too low, it will affect the growth of bacteria, and if the temperature is too high, the activity of the flocculant produced will be reduced.

Method used

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  • Biological composite flocculant for waste water treatment and preparation method thereof

Examples

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Effect test

Embodiment 1

[0017] Example 1 Biological composite flocculant for wastewater treatment according to the present invention and preparation method thereof

[0018] A biocomposite flocculant for wastewater treatment, comprising the following raw materials in parts by weight: 30 parts of co-fermented products of Aspergillus sojae and Nocardia rubrum, 50 parts of cellulose xanthate, and 3 parts of chitosan.

[0019] Wherein the preparation method of the co-fermentation product of Aspergillus sojae and Nocardia rubrum is a two-stage fermentation method, which specifically includes the following steps: after the fermentation medium is sterilized, 10% of Nocardia rubrum seed fermentation liquid is inserted to control the fermentation The temperature is 30°C and the ventilation volume is 1.5m 3 Cultivate under the condition of 40 hours per hour, at this time, insert 10% of Aspergillus sojae seed fermentation broth, control the fermentation temperature at 26°C, and the ventilation rate at 1.8m 3 Cu...

Embodiment 2

[0022] Example 2 Biological composite flocculant for wastewater treatment and preparation method thereof according to the present invention

[0023] A biocomposite flocculant for wastewater treatment, comprising the following raw materials in parts by weight: 40 parts of co-fermented products of Aspergillus sojae and Nocardia rubrum, 95 parts of cellulose xanthate, and 6 parts of chitosan.

[0024] Wherein the preparation method of the co-fermentation product of Aspergillus sojae and Nocardia rubrum is a two-stage fermentation method, which specifically includes the following steps: after the fermentation medium is sterilized, 10% of Nocardia rubrum seed fermentation liquid is inserted to control the fermentation The temperature is 32°C and the ventilation volume is 1.7m 3 Cultivate for 44 hours under the condition of / h, at this time, insert 10% of Aspergillus sojae seed fermentation liquid, control the fermentation temperature at 29°C, and the ventilation rate at 2.2m 3 Cul...

Embodiment 3

[0027] Example 3 Biological composite flocculant for wastewater treatment and preparation method thereof according to the present invention

[0028] A biocomposite flocculant for wastewater treatment, comprising the following raw materials in parts by weight: 35 parts of co-fermented products of Aspergillus sojae and Nocardia rubrum, 75 parts of cellulose xanthate, and 5 parts of chitosan.

[0029] Wherein the preparation method of the co-fermentation product of Aspergillus sojae and Nocardia rubrum is a two-stage fermentation method, which specifically includes the following steps: after the fermentation medium is sterilized, 10% of Nocardia rubrum seed fermentation liquid is inserted to control the fermentation The temperature is 32°C and the ventilation volume is 1.6m 3 Cultivate for 42 hours under the condition of / h, at this time, insert 10% of Aspergillus sojae seed fermentation broth, control the fermentation temperature at 28°C, and the ventilation rate at 2.0m 3 Cult...

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Abstract

The invention provides a biological composite flocculant for waste water treatment and a preparation method thereof and belongs to the field of waste water treatment. In order to overcome the defects of an inorganic flocculant and an organic flocculant in the prior art, the biological composite flocculant is prepared from, by weight, 30-40 parts of co-fermentation broth of aspergillus sojae and red nocardia, 50-95 parts of cellulose xanthate and 3-6 parts of chitosan. The co-fermentation broth of aspergillus sojae and red nocardia is a two-stage fermented product and has a remarkable synergic effect on the aspect of flocculation after being combined with cellulose xanthate and chitosan, and the biological composite flocculant is high in flocculation activity, safe, free of toxins, free of secondary pollution and suitable for application and popularization.

Description

technical field [0001] The invention relates to a biological composite flocculant for wastewater treatment and a preparation method thereof, belonging to the field of wastewater treatment. Background technique [0002] Flocculant is the key factor of flocculation process in wastewater treatment, and the choice of flocculant directly determines the final flocculation effect. Flocculants mainly include inorganic flocculants, organic flocculants and microbial flocculants. Inorganic flocculants include aluminum sulfate, aluminum chloride, ferric sulfate, ferric chloride, etc. Among them, aluminum sulfate was first developed by the United States and has been used as an important inorganic flocculant until now. Commonly used aluminum salts are aluminum sulfate AL 2 (SO 4 ) 3 18H 2 O and Alum AL 2 (SO 4 ) 3 ·K 2 SO 4 24 hours 2 O, the other is iron salts with ferric chloride hydrate FeCL 3 ·6H 2 O. Ferrous Sulfate Hydrate FeSO 4 17H 2 O and iron sulfate. There are t...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34
Inventor 王盛梅
Owner 王盛梅
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