Tongji University

Lingling Dai

Lei Li

Xiaohu Dai

Bin Dong

Ying Xu

Zhigang Liu

Jun Gao

Lipeng Dong

Linke Zheng

The disclosure relates to a method for enhancing methanogenesis in anaerobic digestion of municipal sludge by utilizing a filter screen structure, comprising: arranging a filter screen structure with titanium or titanium alloy as the framework and FeOas the coating in the anaerobic digestion system to accelerate the rate of hydrolysis and acidification, and increase the proportion of methane in biogas. Compared with the prior art, the disclosure increases the contact between FeOand anaerobic microorganisms by means of the screen structure; the stable crystal structure of FeOensures the sustainability as an electron carrier while enriching electroactive microorganisms; titanium or titanium alloy, as a material with high strength, corrosion resistance, good biocompatibility, and good conductivity, can form a good match with FeOand assist in promoting the electron transfer; the disclosure has the advantages of low cost, high income, no need of repeated dosing and stable effect, and could strengthen the oxidation and decomposition of organic matter in the anaerobic digestion, accelerate the rate of methanogenesis, and increase the gas production.

Method for enhancing methanogenesis in anaerobic digestion of municipal sludge by utilizing a filter screen structure

A process for enhanced anaerobic digestion of sludge by alcoholization of food waste, comprising steps of: (1) ethanol prefermentation of food waste&#x2014;feeding the food waste having been crushed into a uniform grain size into an ethanol production reactor, where the food waste is subjected to rapid and efficient anaerobic fermentation activated by addition of yeast and pH adjustment to produce ethanol and obtain a fermentation broth and a fermentation residue; (2) sludge pretreatment&#x2014;pretreating the sludge after mixing with the fermentation residue; and (3) methanogenesis of anaerobic digestion&#x2014;subjecting products resulting from the sludge pretreatment to be mixed with the fermentation broth and then to methanogenesis of anaerobic digestion in a methane production reactor. With this process, the sludge and the food waste can be treated efficiently via multi-phase reactions, and the resource recovery and biogas quality can be enhanced.

Process for enhanced anaerobic digestion of sludge by alcoholization of food waste

Growing community of inventors

Shanghai, China

Lingling Dai