Biological stoichiometric analysis of nutrition and ammonia toxicity in thermophilic anaerobic co-digestion of multiple organic substrates under different organic loading rates

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Biological stoichiometric analysis of nutrition and ammonia toxicity in thermophilic anaerobic co-digestion of multiple organic substrates under different organic loading rates
出版類型SCI(Sciences Citation Index)
出版年度2013
AuthorsSu-Fang Chiu, 邱素芳, Juei-Yu Chiu 邱瑞宇, & Kuo Wen-Chien 郭文健
開始頁323
頁數6
出版日期2013 / 9
其他編號0000
中文摘要

This study used chemostats under different Organic Loading Rates (OLRs) to investigate the co-digestion
of kitchen waste, swine wastewater sludge, and fruit and vegetable waste. In kitchen waste, mean Total
Chemical Oxygen Demand (TCOD), Oil and Grease (O&G), and moisture content (MC) was 101.5 g/L,
33.0 g/L, and 82.7%, respectively. The TCOD/Total Kjeldahl Nitrogen (TKN) and TCOD/Total Phosphorus
(TP) of kitchen waste were 319.5 and 230, respectively. In swine wastewater sludge, TCOD/TKN was 4.56
e43.9 and TCOD/TP was 2.02e31.8. Biodegradability tests of fruit and vegetable waste showed that COD
removal exceeded 56%, and methane recovery exceeded 80%. Co-digestion of these three organic wastes
in chemostats suggests that the system functioned stably up to an OLR of 9.52 g COD/L-d at a Hydraulic
Retention Time (HRT) of 5 days. When the OLR increased to 12.54 g COD/L-d, average COD and Volatile
Suspended Solids (VSS) removal efficiencies decreased from 90% to 76.5% and from 93% to 76.5%,
respectively. The analyzed NH3eN concentration is 28% less than the stoichiometry-predicted concentration.
The discrepancy may be due to differences in substrate biodegradabilities, TKN sampling and
analysis procedures, and parameters used for stoichiometry calculations.

期刊名稱Renewable Energy
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