title: Biogas production improvement and C/N control by natural clinoptilolite addition into anaerobic co-digestion of Phragmites australis, feces and kitchen waste.
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 0.070d(-1), the max rate of 15.89L/(kgVSday) and ultimate biogas production of 308.2L/kgVS 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 NH3-N/NO3-N inhibition efficiency.
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Lieyu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: xibeidou@263.net.
authors.forename: Beidou
authors.initials: B
authors.lastname: Xi
authors.affiliation: Department of Chemical and Biochemical Engineering, Western University, London N6A 3K7, Canada.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Xunfeng
authors.initials: X
authors.lastname: Xia
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Xiaosong
authors.initials: X
authors.lastname: He
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Mingxiao
authors.initials: M
authors.lastname: Li
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Tianxue
authors.initials: T
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Zhonglei
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000693:Anaerobiosis; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D001709:Biotechnology / Q000379:methods*; D002118:Calcium / Q000378:metabolism; D002244:Carbon / Q000378:metabolism; D005243:Feces; D008274:Magnesium / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis; D009566:Nitrates / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D006109:Poaceae / Q000378:metabolism*; D012037:Refuse Disposal; D017641:Zeolites
chemical_list: D056804:Biofuels; D009566:Nitrates; C083175:clinoptilolite; D017641:Zeolites; D002244:Carbon; D000641:Ammonia; D008274:Magnesium; D009584:Nitrogen; D008697:Methane; D002118:Calcium
keywords: Anaerobic co-digestion; C/N ratio; Clinoptilolite; Feces and kitchen waste; Phragmites australis