Department of Civil and Environmental Engineering, University of South Florida, 4202 E Fowler Avenue, ENB 118, Tampa, FL 33620, United States.
Department of Civil and Environmental Engineering, University of South Florida, 4202 E Fowler Avenue, ENB 118, Tampa, FL 33620, United States.
Bioresour Technol. 2015 Aug;190:359-66. doi: 10.1016/j.biortech.2015.04.111. Epub 2015 May 6.
The goal of this research was to understand the effect of solids retention time (SRT) and feeding frequency on the performance of anaerobic digesters used to recover bioenergy from swine waste. Semi-continuous mesophilic anaerobic digesters were operated at varying SRTs and feeding frequencies. Performance metrics included biogas and methane production rates, biomass robustness and functionality and removals of volatile solids, soluble chemical oxygen demand, the fecal-indicator bacteria Escherichia coli, and the human pathogen Salmonella. Biochemical methane formation potential and specific methanogenic activity assays were used to demonstrate biomass robustness and functionality. Results indicated that anaerobic digesters fed weekly had higher average methane yields (0.20 vs. 0.18m(3)CH4/kg-VSadded), specific methanogenic activities (40 vs. 35ml/day), and fecal indicator bacteria destruction (99.9% vs. 99.4%) than those fed every-other day. Salmonella, soluble COD, and VS destruction did not change with varied feeding frequency; however, higher removals were observed with longer SRT.
本研究旨在了解固体停留时间（SRT）和进料频率对用于从猪粪中回收生物能源的厌氧消化器性能的影响。半连续中温厌氧消化器在不同的 SRT 和进料频率下运行。性能指标包括沼气和甲烷产率、生物质的稳健性和功能以及挥发性固体、可溶化学需氧量、粪便指示菌大肠杆菌和人类病原体沙门氏菌的去除率。生物化学甲烷形成潜力和特定甲烷活性测定用于证明生物质的稳健性和功能。结果表明，每周进料的厌氧消化器具有更高的平均甲烷产量（0.20 比 0.18m3CH4/kg-VSadded）、特定甲烷活性（40 比 35ml/天）和粪便指示菌破坏（99.9% 比 99.4%），比每两天进料一次的消化器高。沙门氏菌、可溶 COD 和 VS 破坏率不因进料频率而异；然而，较长的 SRT 观察到更高的去除率。
