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Biogas production improvement and C/N control by natural clinoptilolite addition into anaerobic co-digestion of Phragmites australis, feces and kitchen waste.
- Source :
-
Bioresource Technology . Mar2015, Vol. 180, p192-199. 8p. - Publication Year :
- 2015
-
Abstract
- Anaerobic co-digestion (A co-D) performance of Phragmites australis , feces and kitchen waste with addition of clinoptilolite (one main kind of zeolite) was investigated to evaluate the improvement of biogas/methane production and internal mechanism of nitrogen and organics control. A better biogas/methane production was observed by 10% clinoptilolite (v/v) than bentonite and diatomite, with the shortest lag phase of 0.070 d −1 , the max rate of 15.89 L/(kg VS day) and ultimate biogas production of 308.2 L/kg VS as the modified Gompertz equation predicted. Accordingly, the content of methane in the biogas was increased from 44.10% to 65.30%. Furthermore, the clinoptilolite inhibited the acidification of digestion liquid (optimum pH 7.0–7.5) and enhanced the VFAs (acetic acid, propionic acid and butyric acid) destruction. Moreover, 10% of clinoptilolite optimally enhanced the microbial utilization of Ca 2+ /Mg 2+ , controlled the C/N ratio, and improved the biogas production as well as NH 3 -N/NO 3 -N inhibition efficiency. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09608524
- Volume :
- 180
- Database :
- Academic Search Index
- Journal :
- Bioresource Technology
- Publication Type :
- Academic Journal
- Accession number :
- 101001635
- Full Text :
- https://doi.org/10.1016/j.biortech.2014.12.023