Method for promoting ferment acid production of excess sludge through soapnut saponin production leftovers

A technology of sapindus saponin and excess sludge, which is applied in biological sludge treatment, fermentation, chemical instruments and methods, etc., can solve the problems of increasing excess sludge output, increasing operating costs, and being uneconomical, and achieving the realization of The effect of reducing excess sludge, increasing acid production and realizing resource utilization

Inactive Publication Date: 2016-04-20
JINGGANGSHAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the process of domestic sewage treatment in southern cities, there is a common problem of low carbon-nitrogen ratio. It is often necessary to add external carbon sources to achieve the purpose of nitrogen and phosphorus removal. However, adding external carbon sources will not only increase operating costs, but also In the process of sewage treatment, it will be converted into excess sludge, further increasing the output of excess sludge
Studies have found that the presence of chemical surfa

Method used

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Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1

[0022] In the embodiment of the present invention, the method for using the leftovers produced by Sapindus saponin to promote acid production by fermentation of excess sludge includes the following steps:

[0023] (1) Sapindus saponin produced by water extraction method 20g of sapindus saponin produced by the enterprise (the content of sapindus saponin is 1‰) is dried with a moisture content of 70%, and a moisture content of 10% is obtained. Material 5.34g;

[0024] (2) Leave the remaining sludge to settle for 36 hours until the concentration of the lower layer of concentrated sludge is 25g / L, remove the supernatant, and take 2000ml of concentrated sludge into a 5L anaerobic fermentation tank; produce according to Sapindus Saponin Leftovers: The mass ratio of dry sludge is 0.1:1. Add 5g of the leftovers from the soappin saponins production to the concentrated remaining sludge;

[0025] (3) Perform anaerobic fermentation on the remaining sludge. The specific steps a...

Example Embodiment

[0027] Example 2

[0028] In the embodiment of the present invention, the method for using the leftovers produced by Sapindus saponin to promote acid production by fermentation of excess sludge includes the following steps:

[0029] (1) Sapindus saponin produced by water extraction method production of sapindus saponin production scraps 375g (the content of sapindus saponin is 1%) moisture content is 80%, and the moisture content is 50% scraps 150g;

[0030] (2) Leave the remaining sludge to settle for 36 hours until the concentration of the lower layer of concentrated sludge is 25g / L, remove the supernatant, and take 2000ml of concentrated sludge into a 5L anaerobic fermentation tank; produce according to Sapindus Saponin Leftovers: The mass ratio of dry sludge is 3:1. Add 150g of the leftovers from the soappin saponins production to the concentrated remaining sludge;

[0031] (3) Perform anaerobic fermentation on the remaining sludge. The specific steps are to first pass carbon dio...

Example Embodiment

[0033] Example 3

[0034] In the embodiment of the present invention, the method for using the leftovers produced by Sapindus saponin to promote acid production by fermentation of excess sludge includes the following steps:

[0035] (1) 400g of soapspin saponins produced by the water extraction method for production of sapindus saponin (the content of sapindus saponin is 6‰) is dried with a moisture content of 80%, and a water content of 20% is obtained. ;

[0036] (2) Leave the remaining sludge to settle for 36 hours until the concentration of the lower layer of concentrated sludge is 25g / L, remove the supernatant, and take 2000ml of concentrated sludge into a 5L anaerobic fermentation tank; produce according to Sapindus Saponin Leftovers: The mass ratio of dry sludge is 2:1, and 100g of the leftovers from the soappin saponins production are added to the concentrated remaining sludge;

[0037] (3) Perform anaerobic fermentation on the remaining sludge. The specific steps are to intr...

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PUM

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Abstract

The invention discloses a method for promoting ferment acid production of excess sludge through soapnut saponin production leftovers. The method includes the steps of firstly, drying the soapnut saponin production leftovers; secondly, putting the soapnut saponin production leftovers into concentrated excess sludge; thirdly, conducting anaerobic fermentation on the excess sludge; fourthly, conducting solid-liquid separation on ferment liquid to obtain clear liquid containing volatile fatty acid. By adding the soapnut saponin production leftovers, the hydrolysis fermentation acid yield of the excess sludge is increased, and meanwhile the resource utilization of the soapnut saponin production leftovers and the consumption decrease of the excess sludge are achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for using sapindus saponins to produce leftovers to promote the fermentation of excess sludge to produce acid. Background technique [0002] Soapberry saponin is the extract of the wild deciduous tree Sapindus fruit peel, and its glycosides are mainly triterpene saponins (I) and sesquiterpene glycosides (II), all of which have strong surface activity. Natural non-ionic surfactant and emulsifier, which can reduce the surface tension of water, have good foaming performance and decontamination ability, and have no harm to the environment and human body, and can effectively wash away the pollution attached to the skin surface Various heavy metal particles, and the cleaning ability is better than most other detergents. [0003] In addition to a certain amount of sapindus saponin, the leftovers of sapindus saponin extracted by water extraction also contain ru...

Claims

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Application Information

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IPC IPC(8): C12P7/40C02F11/04
CPCC02F11/04C02F2303/06C12P7/40
Inventor 林俊岳李刚涂剑成罗志刚刘小兵贺根和尹丽曾建忠
Owner JINGGANGSHAN COLLEGE
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