Impacts of free nitrous acid on stabilizing food waste and sewage sludge for anaerobic digestion

被引：0

作者：

Proano, Camila A.

Liu, Ruizhe ^{[1
]}

Xu, Xueming ^{[2
]}

Meisler, Seth ^{[1
]}

Hassanein, Amro ^{[3
]}

Lansing, Stephanie ^{[3
]}

Tian, Kuo ^{[4
]}

Li, Guangbin ^{[1
]}

机构：

[1] Univ Maryland, Dept Civil & Environm Engn, 4298 Campus Dr, College Pk, MD 20742 USA

[2] Virginia Polytech Inst & State Univ, Dept Civil & Environm Engn, 200 Patton Hall, Blacksburg, VA 24061 USA

[3] Univ Maryland, Dept Environm Sci & Technol, 1429 Anim Sci Ag Eng Bldg, College Pk, MD 20742 USA

[4] George Mason Univ, Dept Civil Environm & Infrastruct Engn, 4400 Univ Dr, Fairfax, VA 22030 USA

来源：

BIORESOURCE TECHNOLOGY | 2024年 / 402卷

基金：

美国国家科学基金会;

关键词：

Pre-treatment; Organic wastes; Nitrite inhibition; Sulfide odor; Waste management; EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; METHANE PRODUCTION; PRETREATMENT; NITRITE; BIODEGRADABILITY; DENITRIFICATION; DEWATERABILITY;

D O I：

10.1016/j.biortech.2024.130819

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This work investigated the effectiveness of free nitrous acid (FNA) in enhancing organic waste solubilization to improve biogas production in anaerobic digestion (AD). The results indicated that FNA pretreatment can enhance soluble organic content and control H2S odor in tested organic wastes, including food waste, sewage sludge, and their combination. However, a significant decrease (>50 %) in FNA concentration was found in the reactors, possibly due to denitrifier-driven NO2- consumption. Biochemical methane potential (BMP) tests showed a 25 +/- 8 % enhancement in CH4 production in the reactors fed with mixed substrate pretreated with 2.9 mg FNA-N/L. However, the presence of NO2- (325.6-2368.0 mg N/L) in some BMP reactors, due to carryover from FNA pretreatment, adversely affected CH4 production (>55 %) and prolonged lag time (>4.2 times). These findings are valuable for researchers and practitioners in waste management, offering insights for implementing FNA pretreatment to enhance the biodegradability of organic wastes in AD.

引用

页数：10