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A kind of process of rapidly starting microbial sulfate reduction

A fast-start, sulfate technology, applied in microorganism-based methods, microorganisms, separated microorganisms, etc., can solve the problems of long start-up cycle of microbial sulfate reduction process, difficulty in maintaining long-term stable treatment effect, and difficulty in forming granular sludge. Achieve stable and efficient processing performance, shorten start-up time, and improve tolerance

Active Publication Date: 2021-11-19
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a process for quickly starting microbial sulfate reduction, which is used to solve the problems of long start-up period, difficult formation of granular sludge, easy loss of bacterial strains and difficulty in maintaining long-term stable treatment effects in the existing microbial sulfate reduction process question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Rapid enrichment of sulfate-reducing bacteria: Add the surplus sludge from the sewage treatment plant to the expanded granular sludge bed reactor, and then feed the culture medium to keep the temperature of the expanded granular sludge bed reactor at 27±2 ℃, use liquid caustic soda to adjust the pH of the expanded granular sludge bed reactor to 5.67, fill the expanded granular sludge bed reactor with culture medium, stop the water inlet, turn on the internal circulation water pump, the internal circulation volume reflux ratio is 100%, and run After 5 days, sulfate-reducing bacteria were enriched in the expanded granular sludge bed reactor, and the relative abundance of bacteria reached 47.8%;

[0019] Wherein, the concentration of all components in the culture solution is: SO 4 2- 1500mg / L, NH 4 + 50mg / L, K 2 HPO 4 ·3H 2 O is 30mg / L, glycerin is 500mg / L, and trace element solution is 1ml / L, and all components in the trace element solution are: ZnCl of 750mg / L ...

Embodiment 2

[0027] 1) Rapid enrichment of sulfate-reducing bacteria: Add the surplus sludge from the sewage treatment plant to the expanded granular sludge bed reactor, and then feed the culture medium to keep the temperature of the expanded granular sludge bed reactor at 28±2 ℃, use liquid caustic soda to adjust the pH of the expanded granular sludge bed reactor to 5.5, fill the expanded granular sludge bed reactor with culture medium, stop the water inflow, turn on the internal circulation water pump, the reflux ratio of the internal circulation volume is 200%, and run After 4 days, sulfate-reducing bacteria were enriched in the expanded granular sludge bed reactor, and the relative abundance of bacteria reached 40.1%;

[0028] Wherein, the concentration of all components in the culture solution is: SO 4 2- 1500mg / L, NH 4 + 50mg / L, K 2 HPO 4 ·3H 2 O is 30mg / L, glycerin is 500mg / L, and trace element solution is 1ml / L, and all components in the trace element solution are: ZnCl of 750m...

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Abstract

The present invention provides a process for rapidly starting microbial sulfate reduction (SRB), including: a) rapid enrichment of sulfate-reducing bacteria species, and b) formation of stable and mature sulfate-reducing granular sludge. The technical method of the present invention can form stable and mature sulfate-reducing granular sludge. The removal rate of total metals such as lead and copper is above 99%; (2) the present invention uses the residual sludge of the municipal sewage treatment plant as the inoculated sludge, and firstly conducts rapid enrichment of sulfate-reducing bacteria therein, and then conducts the cultivation of granular sludge , which increases the biological holding capacity of sulfate-reducing bacteria in the granular sludge, ensures the efficiency of sulfate reduction, and effectively improves the tolerance of the system to the toxicity of heavy metals.

Description

technical field [0001] The invention belongs to the field of nonferrous metal metallurgy, and relates to a process for quickly starting microbial sulfate reduction. Background technique [0002] In the process of non-ferrous metal mining and non-ferrous metal smelting, acidic heavy metal wastewater will be discharged, such as mine acid wastewater and non-ferrous metal smelting sewage acid wastewater. Acidic heavy metal wastewater has adverse effects on organisms and the environment, in which heavy metals will be enriched through the ecological chain and eventually endanger human health. At present, for acidic heavy metal wastewater, the lime neutralization method is widely used in industry. However, in the process of treatment, the lime consumption is large, the cost of chemicals is high, and a large amount of heavy metal-containing sediment is produced, which has the risk of secondary environmental pollution. . [0003] Using sulfate-reducing bacteria to reduce sulfate ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C12N1/20C12N1/02C12R1/01
Inventor 谷启源刘兴宇崔兴兰温建康
Owner 有研资源环境技术研究院(北京)有限公司
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