title: Strategy of mitigating ammonium-rich waste inhibition on anaerobic digestion by using illuminated bio-zeolite fixed-bed process.
abstract: Intermittent illumination combined with bio-zeolite fixed-bed process was utilized to improve the efficiency of anaerobic digestion with ammonium-rich substrate. The batch experiments were carried out at NH4+-N concentration of 2211mg/L under intermittent illumination and dark (as control) conditions, respectively. The illuminated bioreactor achieved higher methane production (287mL/g-DOC) and ATP value (0.38μmol/L) than that under dark condition. Then the bio-zeolite fixed-bed bioreactor (NH4+-N concentration: 3000mg/L) was used to study the additional efficiency on the illuminated ammonium-rich anaerobic digestion process. The result showed that the illuminated fixed-bed bioreactor presented the greatest methane concentration (70%), methane yield (283mL/g-DOC) and quantity of methanogens comparing with no-bed bioreactor. Furthermore, the illuminated fixed-bed bioreactor achieved better performance during 118-day semi-continuous fermentation. The combination of the intermittent illumination and bio-zeolite fixed-bed strategy contributed to the higher efficiency and stability of the ammonium-rich anaerobic digestion process.
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Mishma Silvia
authors.initials: MS
authors.lastname: Stanislaus
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Hu
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Chenyu
authors.initials: C
authors.lastname: Zhao
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhu
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Dawei
authors.initials: D
authors.lastname: Li
authors.affiliation: Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan. Electronic address: yo.innan.fu@u.tsukuba.ac.jp.
authors.forename: Yingnan
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D064751:Ammonium Compounds / Q000032:analysis*; D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism / Q000528:radiation effects; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology; D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D005285:Fermentation; D008027:Light; D008697:Methane / Q000032:analysis; D012722:Sewage / Q000382:microbiology; D014866:Waste Products; D017641:Zeolites / Q000737:chemistry*
chemical_list: D064751:Ammonium Compounds; D012722:Sewage; D014866:Waste Products; D017641:Zeolites; D000255:Adenosine Triphosphate; D008697:Methane
keywords: Ammonia inhibition; Bio-zeolite; Fixed-bed bioreactor; Intermittent illumination anaerobic digestion