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Method for processing starch waste water and realizing resourcezation of waste water by one photosynthetic bacterium strain

A technology for treating starch and photosynthetic bacteria, which is applied in chemical instruments and methods, methods based on microorganisms, biochemical equipment and methods, etc., can solve the problems of low sewage treatment efficiency, low degree of resource utilization, complex process flow, etc., to achieve The effect of recycling sewage, simplifying the process flow, and overcoming serious secondary pollution

Inactive Publication Date: 2012-10-03
RENMIN UNIVERSITY OF CHINA
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Problems solved by technology

[0005] The present invention aims at the problems that photosynthetic bacteria cannot degrade macromolecules, thus requiring a pretreatment process, resulting in complex process flow, low sewage treatment efficiency, and low degree of resource utilization, and at the same time solves the serious secondary pollution of traditional starch wastewater treatment methods problem, and proposed a method that can effectively treat starch wastewater and realize the resource utilization of starch wastewater

Method used

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  • Method for processing starch waste water and realizing resourcezation of waste water by one photosynthetic bacterium strain
  • Method for processing starch waste water and realizing resourcezation of waste water by one photosynthetic bacterium strain
  • Method for processing starch waste water and realizing resourcezation of waste water by one photosynthetic bacterium strain

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specific Embodiment approach 1

[0013] Specific embodiment 1: The method for utilizing a photosynthetic bacterium to treat starch wastewater and realize the resource utilization of sewage as described in this embodiment is carried out according to the following steps: first, add 200 ~ 600mg / L of malic acid to adjust the pH value of the starch wastewater to about 7.0-9.0, and then add 160-500mg / L of Rhodobacter sphaericus in the logarithmic growth phase to the starch wastewater. Treat under light anaerobic conditions for 120-144 hours, and the treatment temperature is 25-30°C. COD, total sugar and biomass in sewage were measured every 24 hours.

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment differs from Embodiment 1 in that: the starch wastewater concentration selected is 12000 mg / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment differs from Embodiments 1 to 2 in that: 400 mg / L of malic acid is added to the starch wastewater, and then the pH value of the starch wastewater is adjusted to about 7.0. Others are the same as in the first embodiment.

[0016] Malic acid provides the initial carbon source and energy for the growth of photosynthetic bacteria, which stimulates the activity of photosynthetic bacteria and triggers the production of amylase in photosynthetic bacteria, thereby degrading starch.

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Abstract

The invention relates to a method for processing starch waste water and realizing resourcezation of waste water by one photosynthetic bacterium strain, relating to the field of development of waste water treatment and resourcezation. The starch waste is used as the object, 200 mg / L-600mg / L malic acid is added in the starch waste water in order to adjust the pH value of the starch waste water into 7.0-9.0, and then 160 mg / L-500mg / L rhodobacter sphaeroides at the exponential phase is added. The starch waste water is processed under the illumination anaerobic condition, a filament lamp with illumination strength of 2000lux-3000lux is used as the light source, and the processing temperature is 25 DEG C to 30 DEG C. With the adoption of the method, the photosynthetic bacterium waste water treatment process is simplified, and meanwhile, the large amount of generated bacteria can be directly and comprehensively utilized, so that the purposes of disposing pollution and generating bacterium resources can be synchronously fulfilled.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating starch wastewater and realizing resource utilization. technical background [0002] Starch wastewater is the largest type of wastewater discharged in the food processing industry. It is non-toxic and harmless, rich in macromolecular nutrients such as starch, protein and cellulose. Known starch wastewater treatment methods include coagulation sedimentation, air flotation, physicochemical-hydrolytic acidification-contact oxidation, UASB and other methods. However, the use of these methods will produce a large amount of excess sludge, and its treatment and disposal costs are high, the degree of resource utilization is low, and it is easy to cause secondary pollution. [0003] The use of photosynthetic bacteria (Photosynthetic bacteria) to treat starch wastewater can not only remove pollutants and purify the environment, but at the same time, the recovered bact...

Claims

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Application Information

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IPC IPC(8): C02F3/34C12N1/20C12R1/01
Inventor 张光明卢海凤张盼月
Owner RENMIN UNIVERSITY OF CHINA
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