Enhanced methane yield in anaerobic digestion of waste activated sludge by combined pretreatment with fungal mash and free nitrous acid

被引：12

作者：

Zhang, Min ^{[1
]}

Yang, Yuwei ^{[1
]}

Mou, Huaqian ^{[2
]}

Pan, Aodong ^{[1
]}

Su, Xiaomei ^{[1
]}

Chen, Jianrong ^{[1
]}

Lin, Hongjun ^{[1
]}

Sun, Faqian ^{[1
,3
,4
]}

机构：

[1] Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China

[2] Jinhua Water Treatment Co Ltd, Jinhua 321017, Peoples R China

[3] Ecoenvironm Sci Res & Design Inst Zhejiang Prov, Key Lab Environm Pollut Control Technol Res Zhejia, Hangzhou 310007, Zhejiang, Peoples R China

[4] Yingbin Rd 688, Jinhua 321004, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 385卷

基金：

中国国家自然科学基金;

关键词：

Aspergillus; Sludge solubilization; Hydrolysis; Biochemical methane potential; POLYMERIC SUBSTANCES EPS; FOOD WASTE; ENZYMATIC PRETREATMENT; HYDROLYSIS; NITRITE; BIODEGRADATION; MECHANISM;

D O I：

10.1016/j.biortech.2023.129441

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study explores a novel approach for enhancing anaerobic digestion of waste activated sludge (WAS) through the combined pretreatment of fungal mash and free nitrous acid (FNA). Aspergillus PAD-2, a fungal strain with superior hydrolase secretion, was isolated from WAS and cultivated in-situ on food waste to produce fungal mash. The solubilization of WAS by fungal mash achieved a high soluble chemical oxygen demand release rate of 548 mg L-1 h-1 within first 3 h. The combined pretreatment of fungal mash and FNA further improved the sludge solubilization by 2-fold and resulted in a doubled methane production rate of 416 & PLUSMN;11 mL CH4 g-1 volatile solids. The Gompertz model analysis revealed a higher maximum specific methane production rate and shortened lag time by the combined pretreatment. These results demonstrate that the combined fungal mash and FNA pretreatment offers a promising alternative for fast anaerobic digestion of WAS.

引用

页数：9

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