Two Phase Anaerobic Digestion System of Municipal Solid Waste by Utilizing Microaeration and Granular Activated Carbon

Energies

Blondy Canto Canché¹  JuanEnrique Ruiz Espinoza²  Elda España Gamboa³  Jorge Domínguez Maldonado⁴  Fernando Canul Bacab⁴  Liliana Alzate-Gaviria⁴  Raúl Tapia Tussell⁴  RosaM Leal-Bautista⁵ 

[1] Biotechnology Unit, Yucatán Center for Scientific Research (CICY), Mérida 97203, Mexico;Faculty of Chemical Engineering, Autonomous University of Yucatan, Periférico Norte, Km. 33.5, Tablaje Catastral 13615, Col. Chuburná de Hidalgo Inn, C.P. Mérida 97203, Mexico;Renewable Energy Department, Higher Technological Institute of Motul, Motul 97205, Mexico;Renewable Energy Unit, Yucatan Center for Scientific Research, Mérida 97203, Mexico;Water Research Unit, Yucatan Center for Scientific Research, Cancún Q. Roo 77524, Mexico;

关键词: organic fraction of municipal solid waste;    anaerobic digestion;    micro-aeration;    granular activated carbon;    coupled reactors;   

DOI  :  10.3390/en13040933

来源: DOAJ

【 摘 要 】

In an anaerobic digestion (AD) process, the hydrolysis phase is often limited when substrates with high concentrations of solids are used. We hypothesized that applying micro-aeration in the hydrolysis phase and the application of granular activated carbon (GAC) in the methanogenesis phase could make the AD process more efficient. A packed bed reactor (PBR) coupled with an up-flow anaerobic sludge blanket (UASB) was conducted, and its effects on methane generation were evaluated. The micro-aeration rate applied in PBR was 254 L-air/kg-Total solids (TS)-d was compared with a control reactor. Micro-aeration showed that it reduced the hydrolysis time and increased the organic matter solubilization as chemical oxygen demand (COD) increasing 200%, with a volatile fatty acids (VFAs) increment higher than 300%, compared to the control reactor (without aeration). Our findings revealed that the implementations of microaeration and GAC in the two-phase AD system could enhance methane production by reducing hydrolysis time, increasing solid waste solubilization.

【 授权许可】

Unknown