Method for promoting sludge to produce organic acid utilizing surface active agent

Abstract

This invention relates to a method for promoting sludge to producing organic acid with a surface active agent, which takes the elementary deposition mud, residural sludge or their mixtures of a pollutant water process plant as the raw material to turn the undissolved sludge organics in the mud to organic acid acted by microbials in the mud, the ratio of the volume of the surface active agent and the dry sludge is 0.01: 1-0.3 : 1 and sludge stays for 5 hours ¿C 30 days in the reactor, which reduces volume of sludge and pollution to the environment and uses it as the resource.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for promoting the production of organic acids from sludge by using surfactants. Background technique

[0002] In recent years, biological methods have been widely used in the treatment of urban sewage, but a large amount of sludge (including primary sludge and residual sludge) is produced in this process. According to a survey of 29 urban sludge treatment plants in China in 1996, the amount of sludge produced per 10,000 tons of wastewater is 0.3-3.0 tons (dry weight). In order to prevent secondary pollution, these sludges must be properly treated to stabilize them.

[0003] Anaerobic digestion produces methane (CH 4 ) and other energy materials, and become a common method for sludge stabilization. Organic acids (especially short-chain fatty acids, including acetic acid, propionic acid, etc.) are very important intermediate products produce...