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Anaerobic biological treatment method for residual sludge and nonyl phenol in landscape ecological sewage treatment system

A sewage treatment system and excess sludge technology, which are applied in biological sludge treatment, water/sludge/sewage treatment, sludge treatment, etc., to achieve the effect of promoting biodegradation.

Active Publication Date: 2021-07-23
SHANGHAI HIGHWAY BRIDGE (GRP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, up to now, there is no report on the efficient degradation of organic pollutants while ensuring the efficient production of SCFAs in the process of anaerobic fermentation of excess sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the sludge anaerobic biological fermentation reactor containing 300mg / kg dry sludge nonylphenol, the fermentation pH is controlled to be 10.0, the sludge TSS is controlled to be 13g / L, and dodecylbenzenesulfonic acid of 0.20g / g TSS is added Sodium and the reaction substrate are mixed evenly, the reaction temperature is controlled at 35°C, and the operation is carried out for 8 days. Through the action of alkali treatment, surfactant and microorganisms in the sludge, the production of SCFAs was 3560mgCOD / L, and the degradation efficiency of nonylphenol was 78.6%.

Embodiment 2

[0025] In the sludge anaerobic biological fermentation reactor containing 300mg / kg dry sludge nonylphenol, the fermentation pH is controlled to be 9.0, the sludge TSS is controlled to be 13g / L, and dodecylbenzenesulfonic acid of 0.20g / g TSS is added Sodium and the reaction substrate are mixed evenly, the reaction temperature is controlled at 35°C, and the operation is carried out for 8 days. Through the action of alkali treatment, surfactant and microorganisms in the sludge, the yield of SCFAs was 2980mgCOD / L, and the degradation efficiency of nonylphenol was 74.1%.

Embodiment 3

[0027] In the sludge anaerobic biological fermentation reactor containing 300mg / kg dry sludge nonylphenol, the fermentation pH is controlled to be 10.0, the sludge TSS is controlled to be 13g / L, and sodium dodecylsulfonate of 0.20g / g TSS is added , the reaction substrates were mixed evenly, the reaction temperature was controlled at 35°C, and the operation was carried out for 8 days. Through the action of alkali treatment, surfactant and microorganisms in the sludge, the production of SCFAs was 3312mgCOD / L, and the degradation efficiency of nonylphenol was 75.3%.

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Abstract

An anaerobic biological treatment method for residual sludge and nonyl phenol in a landscape ecological sewage treatment system comprises the following steps of: adding residual sludge containing nonyl phenol into an anaerobic biological fermentation reactor, adding a surfactant, adjusting the fermentation pH value to achieve an alkaline state, controlling the anaerobic fermentation temperature, stirring to uniformly mix the reaction system, and running for a period of time. The method can effectively promote fermentation of the sludge to produce acid and anaerobic biodegradation of the nonyl phenol at the same time, reduces environmental pollution caused by the sludge and the nonyl phenol, and lays a foundation for land utilization after anaerobic fermentation of the sludge; and meanwhile, the method has important guidance and reference significance on removal of other organic pollutants in sludge in a landscape ecological sewage treatment system.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a treatment technology for refractory organic pollutants, in particular to a method for simultaneously promoting anaerobic fermentation acid production and nonylphenol anaerobic biodegradation of residual sludge in a landscape ecological sewage treatment system. Background technique [0002] With the continuous acceleration of urbanization and industrialization in our country, the discharge and pollution degree of domestic sewage and industrial wastewater are also increasing. The degree of pollution of sewage and wastewater is becoming more and more serious. The traditional sewage treatment process can no longer be effectively treated. Moreover, people have higher and higher requirements for the surrounding environment and landscape of sewage treatment plants. Traditional sewage treatment methods have poor landscape, poor sanitary conditions, Problems such as easy generation...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F11/00C02F101/34
CPCC02F11/04C02F11/00C02F2305/04C02F2101/345
Inventor 张振光冯雷雨周雷杰朱文斌
Owner SHANGHAI HIGHWAY BRIDGE (GRP) CO LTD
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