Efficiency improving method for biochar addition-based anaerobic membrane bioreactor

An anaerobic membrane bioreactor technology, which is applied in the field of efficiency enhancement of anaerobic membrane bioreactors, can solve the problems of low treatment efficiency, poor system stability, and reduce membrane fouling rate, etc., so as to promote anaerobic digestion and improve stability. The effect of sex, effective use

Pending Publication Date: 2021-09-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0004] In order to improve the problems of low treatment efficiency of anaerobic membrane bioreactors under high organic loading conditions, easy pollution of membrane modules, and poor system stability, the present invention provides a synergistic effect of anaerobic membrane bioreactors based on biochar addition Method, with the help of the huge specific surface area and porous structure of biochar to enrich the free mutualistic flora in the fermentation sy

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  • Efficiency improving method for biochar addition-based anaerobic membrane bioreactor
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  • Efficiency improving method for biochar addition-based anaerobic membrane bioreactor

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specific Embodiment approach

[0025] The specific implementation method of the present invention is as follows: artificially synthesized kitchen waste is used as a substrate and added to an anaerobic membrane bioreactor. When the gas group and gas volume of the anaerobic membrane bioreactor reach the theoretical value, the reactor is considered to be started successfully. Then add biochar to one of the reactors. During the operation, the gas production and gas components of the reactor are regularly measured, and the COD, polysaccharide, and protein contents of water and sludge are measured by sampling two to three times a week. The change of transmembrane pressure difference is recorded in real time to monitor membrane fouling. The specific steps are as follows.

[0026] (1) Preparation of walnut shell biochar: Take a certain amount of walnut shells and place them in the atmosphere furnace, blow nitrogen into the furnace for 5 minutes to eliminate the oxygen in the furnace, and then start the program to ke...

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Abstract

The invention relates to an efficiency improving method for a biochar addition-based anaerobic membrane bioreactor. The method comprises the following steps: 1, preparing walnut shell biochar; 2, adding the walnut shell biochar prepared in step 1 into an anaerobic membrane bioreactor which is successfully started, and taking another reactor which is not added with the walnut shell biochar as a control group; and 3, operating the reactor, operating the reactor for one cycle when the HRT is 30 d, then increasing the organic load, enabling the reactor to operate for one cycle when the HRT is 20 d, and regularly measuring various indexes in the reactor. Free syntrophic flora in a biochar enrichment fermentation system is utilized, and oxygen-containing functional groups on the surface of the biochar are utilized to excite direct electron transfer between interspecies of syntrophic methanogens, so that the kitchen waste treatment efficiency of the anaerobic membrane bioreactor is improved. At the same time, the adsorption conversion effect of the biochar on free macromolecules reduces the potential of the biochar on the membrane pollution and plugging effect, and the scouring effect of the biochar on the membrane during aeration also reduces the membrane pollution rate.

Description

technical field [0001] The invention relates to the field of waste energy recovery, in particular to a method for synergizing anaerobic membrane bioreactors based on biochar addition. Background technique [0002] Food waste is an important part of urban organic waste, and its carbohydrate, protein, fat and salt content is relatively high, so it has a high recycling value. The anaerobic fermentation technology can recycle the organic matter in the kitchen waste, convert it into usable energy substances, and use these energy substances to generate electricity and realize zero energy consumption in the treatment process. When anaerobic technology is used to treat food waste, since the main components of food waste are easily biodegradable carbohydrates and fatty substances, under high-load conditions, the acidification speed is too fast, causing excessive accumulation of organic acids and other problems, inhibiting anaerobic The activity of microorganisms leads to the reducti...

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/2853
Inventor 李倩陈豪刘亚前陈荣吴苑巨昕玥
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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