期刊
BIORESOURCE TECHNOLOGY
卷 220, 期 -, 页码 666-671出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.09.027
关键词
Biomethanation; Rice straw; High solid loading; Micronutrient; Compost
资金
- Indian Council of Agricultural Research, New Delhi, Government of India [VVN/EAAI/DRET-BCT/2014/2]
Biomethanation of rice straw (RS) was studied in a batch mode at high total solid content (TSC) of 25% in outdoor pilot scale digesters. Performance was monitored for over six months by supplementing Nickel and Cobalt 15 and 10 mg kg(-1) RS to each of mesophilic and thermophilic digesters for 35 and 21 days retention time (RT), respectively. The average biogas production from mesophilic and thermophilic digesters were found varying 310 and 396 L kg(-1) TS, respectively. The corresponding figures for the control digesters were 225 and 270 L kg(-1) TS. Around 37 and 46% higher biogas production was recorded by supplementing the micronutrients in mesophilic and thermophilic digesters, respectively. Methane content in biogas was 57-59%. Matured compost had nitrogen, phosphorus and potassium contents of 1.0-1.2, 1.3-2.2, and 1.2-2.1%, respectively. The results demonstrated that the present process is faster, requires less than 85% water and produces green energy in addition to manure in less time compared to conventional process. (C) 2016 Elsevier Ltd. All rights reserved.
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