Anaerobic Co-Digestion of Condensate from Biosolids Pyrolysis 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
Residuals and biosolids conference 2018, vol. 1: Residuals and biosolids conference 2018, 15-18 May 2018, Phoenix, Arizona, USA
出版年
2018
页码
146-151
会议地点
Phoenix
作者单位
Department of Civil, Construction and Environmental Engineering, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201, USADepartment of Civil, Construction and Environmental Engineering, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201, USADepartment of Civil, Construction and Environmental Engineering, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201, USA
作者
Saba Seyedi;Kaushik Venkiteshwaran;Daniel Zitomer
摘要
Pyrolysis process is a thermochemical technology that can be used to recover energy from wastewater biosolids while reducing harmful environmental impacts as well as health concerns from biosolids reuse. The process transforms biosolids into biochar, py-gas and pyrolysis liquid. Pyrolysis liquid can contain both bio-oil and an aqueous condensate. Bio-oil can be processed and used as fuel; however, the condensate (non-catalyzed), which is a high-COD water solution containing aromatic organics and nitrogen-containing compounds, has no apparent use. Autocatalytic pyrolysis (i.e. using biochar as catalyst) is one method to increase py-gas while decreasing or eliminating bio-oil volume; however, condensate (catalyzed) may still be produced and must be managed. Co-digesting condensate in anaerobic digesters at municipal water resource recovery facilities is a possible way to manage condensate and recover energy in the form of biomethane. However, ammonia-nitrogen (NH3-N) and some organics present in the condensate can be inhibitory to anaerobic microorganisms. In this study, sustainable anaerobic digester organic loading rates for condensate of 0.01 to 0.05 kg COD/m~3-day were detenuined for unacclimated biomass using anaerobic toxicity assays (ATAs). Organic constituents in condensate caused significant methane production inhibition alone or in combination with NH_3-N. Continuous co-digestion of both catalyzed and non-catalyzed condensates and synthetic primary sludge was also performed. Co-digesters fed aerated non-catalyzed condensate produced statistically more methane than the control digesters that were fed only synthetic primary sludge. Therefore, some organic constituents in condensate are convertible to methane by unacclimated biomass. However, co-digesters fed catalyzed condensate (both aerated and unaerated) produced significantly less methane than control digesters. Microbial community analysis showed a decrease in Archaeal community diversity when condensate was co-digested.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
关键词
Bio-oil;condensate;thermochemical process;biochar
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部