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Method for promoting anaerobic degradation of estrogen NP (nonyl phenol) in sludge under combined action of surfactant and alkali treatment

A surfactant and co-action technology, applied in the field of promoting anaerobic degradation of estrogen nonylphenol in sludge, can solve the problems of lack of degradation research

Inactive Publication Date: 2015-06-03
TONGJI UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although nonylphenol (NP) in sludge has been proven to be biodegradable under anaerobic conditions, there is still a lack of research on the degradation of these substances in sludge under fermentation and acid production conditions, and anaerobic fermentation of sludge An important way for the subsequent resource utilization of mud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add the nonylphenol-containing sludge sample to the serum bottle of the anaerobic reactor with a volume of 500mL, in which the sludge concentration is 13g / L, and the nonylphenol concentration is 146mg / kg dry sludge. The pH is not adjusted, and the reaction is sealed. The device was kept anaerobic, the fermentation reaction temperature was controlled at 37°C, and the anaerobic fermentation was carried out for 9 days. The nonylphenol in the sludge was degraded through alkaline fermentation and microbial action, and the degradation efficiency of nonylphenol was 24.6%.

Embodiment 2

[0025] Add the nonylphenol-containing sludge sample to a 500mL anaerobic reactor serum bottle, in which the sludge concentration is 13g / L, the nonylphenol concentration is 146mg / kg dry sludge, adjust the pH=10, and seal The reactor was kept anaerobic, the fermentation reaction temperature was controlled at 37°C, and the anaerobic fermentation was carried out for 9 days. The nonylphenol in the sludge was degraded through alkaline fermentation and microbial action, and the degradation efficiency of nonylphenol was 47.0%.

Embodiment 3

[0027] Add the nonylphenol-containing sludge sample to the serum bottle of anaerobic reactor with a volume of 500mL, in which the sludge concentration is 13g / L, and the nonylphenol concentration is 146mg / kg. Ionic Surfactant Brij 30 , the concentration is 0.5g / kg dry sludge, the sealed reactor is kept anaerobic, the fermentation reaction temperature is controlled at 37°C, and anaerobic fermentation is carried out for 9 days. Through sludge alkaline fermentation and microbial action, nonylphenol in sludge was degraded, and the degradation efficiency of nonylphenol was 57.7%.

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Abstract

The invention belongs to the technical field of persistent refractory organic pollutant treatment for environmental protection and relates to a method for promoting anaerobic fermentation degradation of estrogen NP (nonyl phenol) in sludge. The method comprises steps as follows: adding sludge containing the estrogen NP to an anaerobic reactor, adjusting the anaerobic fermentation pH value of the sludge to enable the sludge to be alkaline, adding a surfactant, controlling the fermentation temperature, performing stirring to enable a reaction system to be evenly mixed, and leaving the reaction system to stand for a period. With the adoption of the method, anaerobic degradation of the estrogen NP in the sludge can be effectively promoted, pollution caused by the estrogen to the environment can be reduced, a foundation is laid for land utilization after anaerobic digestion of the sludge, and meanwhile, the method has important guidance and reference significance in removal of other refractory organic pollutants in the sludge.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and refractory organic pollutant treatment, and relates to a method for promoting anaerobic degradation of estrogen nonylphenol in sludge. Background technique [0002] Nonylphenol is mainly derived from the degradation of nonylphenol polyoxyethylene ether, which is the main raw material of synthetic detergents and is widely used. Usually, with the discharge and treatment of wastewater, nonylphenol ethoxylates are converted into more toxic nonylphenols, which are enriched into sludge in large quantities, and cause harm to subsequent sludge treatment, disposal and resource utilization. [0003] Research on NP at home and abroad mainly focuses on the migration and transformation of NP in the environment, microbial degradation, biosorption, and the cultivation of dominant strains. The degree of microbial degradation of NP is closely related to external environmental conditions such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04
CPCC02F11/04C02F2303/06
Inventor 严媛媛王晓段旭房阔陈建光王禹静周琪
Owner TONGJI UNIV
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