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A method of using apg06 to promote acid production by anaerobic fermentation of excess sludge

A technology for anaerobic fermentation and excess sludge, applied in the field of solid waste resource utilization, can solve the problems of poor biodegradability, environmental impact, and insufficient improvement of the effect of anaerobic fermentation of excess sludge to produce acid, and achieve easy Biodegradation, human and environmental safety, the effect of shortening the time of fermentation and acid production

Active Publication Date: 2021-07-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that most of the current chemically synthesized surfactants have poor biodegradability, are likely to have a negative impact on the environment, and the effect of anaerobic fermentation of excess sludge on acid production is not significantly improved, the present invention provides A method of using APG06 to promote the production of acid by anaerobic fermentation of excess sludge, in particular to a method of using APG06 to promote the production of acid by anaerobic fermentation of excess sludge, and the adopted technical scheme is as follows:

Method used

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  • A method of using apg06 to promote acid production by anaerobic fermentation of excess sludge
  • A method of using apg06 to promote acid production by anaerobic fermentation of excess sludge
  • A method of using apg06 to promote acid production by anaerobic fermentation of excess sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: APG promotes the determination of the best type of sludge anaerobic fermentation acid production

[0030] (1) Six kinds of APG (APG06, APG08, APG0810, APG0812, APG10, APG1214) were selected for batch sludge fermentation experiments.

[0031] (2) Each reactor (500mL anaerobic bottle, sealed with a rubber cap) contains 300mL activated sludge, and the 6 kinds of APG are added at the doses of 0.1g / gTSS, 0.15g / gTSS, and 0.2g / gTSS respectively In each reactor, another group without adding APG was set up as a control group.

[0032] (3) Before fermentation, each reactor was fed with nitrogen for 5 minutes to remove oxygen, and then sealed and anaerobically fermented at 35±1° C. and 200 rpm for 12 days. During the fermentation process, samples were taken for each group at 60min, 6h, 12h and 1, 2, 3, 4, 5, 6, 8, 10, 12d, including liquid and gas samples.

[0033] 4) performing solid-liquid separation by centrifuging the fermented liquid to obtain a supernatant co...

Embodiment 2

[0039] Embodiment 2: APG promotes the determination of the optimal type and concentration of sludge anaerobic fermentation acid production

[0040] (1) Two kinds of APG (APG06, APG1214) were selected for batch sludge fermentation experiments.

[0041] (2) Each reactor (500mL anaerobic bottle, sealed with a rubber cap) contained 300mL activated sludge, and the two APGs were added to each reactor at the dose of 0.1, 0.2, 0.3, 0.4, 0.5g / gTSS In the reactor, another group without adding APG was set as the control group.

[0042] (3) Before fermentation, each reactor was fed with nitrogen for 5 minutes to remove oxygen, then sealed and cultivated at 35±1° C., 200 rpm for 12 days. During the fermentation process, samples were taken for each group at 60min, 6h, 12h and 1, 2, 3, 4, 5, 6, 8, 10, 12d, including liquid and gas samples.

[0043] (4) performing solid-liquid separation by centrifuging the fermented liquid to obtain a supernatant liquid containing volatile fatty acids.

...

Embodiment 3

[0047] (1) Two kinds of APG (APG06, APG1214) were selected for batch sludge fermentation experiments.

[0048] (2) Each reactor (500mL anaerobic bottle, sealed with a rubber cap) contained 300mL activated sludge, and the two APGs were added to each reactor at the dose of 0.1, 0.2, 0.3, 0.4, 0.5g / gTSS In the reactor, another group without adding APG was set as the control group, and the composition of VFAs in each experimental group was measured when the concentration of VFAs reached the maximum value.

[0049] (3) Before fermentation, each reactor was fed with nitrogen for 5 minutes to remove oxygen, then sealed and cultivated at 35±1° C., 200 rpm for 12 days.

[0050] Through the implementation of this example, the composition of VFAs gradually remained stable after the third day of fermentation, and the composition of VFAs in each experimental group when the concentration of VFAs reached the maximum value was as follows: Figure 5 shown. It can be seen that the composition...

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Abstract

The invention discloses a method for promoting acid production by anaerobic fermentation of excess sludge by using APG06, and belongs to the technical field of resource utilization of solid waste. The method includes the following steps: settling the remaining sludge of the sewage treatment plant, pouring off the supernatant to obtain concentrated sludge, adding alkyl glucoside to the concentrated sludge, and mixing evenly, the model of the alkyl glycoside is For APG06, anaerobic fermentation was carried out under anaerobic conditions, and the supernatant containing volatile fatty acids was obtained by centrifugation. The invention promotes acid production by anaerobic fermentation of excess sludge by adding alkyl glycoside APG06, can effectively shorten the time of fermentation acid production, and significantly increase the yield of volatile fatty acids. The method is suitable for acid production by anaerobic fermentation of surplus sludge.

Description

technical field [0001] The invention relates to a method for promoting acid production by anaerobic fermentation of excess sludge by using APG06, and belongs to the technical field of solid waste resource utilization. Background technique [0002] Biological wastewater treatment is the most used municipal wastewater treatment method worldwide, however, it has a disadvantage that a large amount of residual activated sludge (WAS) is produced as a by-product. China's sludge problem has caused serious environmental pollution and public concern, and its total sludge production has an annual growth rate of 13% between 2007 and 2013, and its dry sludge production reached 6.25×10 in 2013 6 t, but more than 80% of the sludge is improperly treated and discarded, causing environmental pollution and accompanied by a huge waste of resources. WAS contains a large amount of organic matter, such as protein and sugar, so it is commonly used to produce methane through anaerobic digestion. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/54C12P7/52C02F11/04C02F11/121
CPCC02F11/04C02F11/12C02F2303/06C12P7/52C12P7/54
Inventor 贺诗欣陈冲杨中凯
Owner HARBIN INST OF TECH