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Impacts of free nitrous acid on stabilizing food waste and sewage sludge for anaerobic digestion.
Proano, Camila A; Liu, Ruizhe; Xu, Xueming; Meisler, Seth; Hassanein, Amro; Lansing, Stephanie; Tian, Kuo; Li, Guangbin.
Affiliation
  • Proano CA; Department of Civil and Environmental Engineering, University of Maryland, 4298 Campus Dr., College Park, MD 20742, USA.
  • Liu R; Department of Civil and Environmental Engineering, University of Maryland, 4298 Campus Dr., College Park, MD 20742, USA.
  • Xu X; Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, 200 Patton Hall, Blacksburg, VA 24061, USA.
  • Meisler S; Department of Civil and Environmental Engineering, University of Maryland, 4298 Campus Dr., College Park, MD 20742, USA.
  • Hassanein A; Department of Environmental Science & Technology, University of Maryland, 1429 Animal Sciences/Ag. Eng. Bldg, College Park, MD 20742, USA.
  • Lansing S; Department of Environmental Science & Technology, University of Maryland, 1429 Animal Sciences/Ag. Eng. Bldg, College Park, MD 20742, USA.
  • Tian K; Department of Civil, Environmental, and Infrastructure Engineering, George Mason University, 4400 University Drive, Fairfax, VA 22030, USA.
  • Li G; Department of Civil and Environmental Engineering, University of Maryland, 4298 Campus Dr., College Park, MD 20742, USA. Electronic address: gli2019@umd.edu.
Bioresour Technol ; 402: 130819, 2024 Jun.
Article in En | MEDLINE | ID: mdl-38723728
ABSTRACT
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.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Sewage / Bioreactors / Methane / Nitrous Acid Language: En Journal: Bioresour Technol Journal subject: ENGENHARIA BIOMEDICA Year: 2024 Document type: Article Affiliation country: Estados Unidos
Fulltext
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Sewage / Bioreactors / Methane / Nitrous Acid Language: En Journal: Bioresour Technol Journal subject: ENGENHARIA BIOMEDICA Year: 2024 Document type: Article Affiliation country: Estados Unidos