title: Measuring the activity of heterotrophic microorganism in membrane bioreactor for drinking water treatment.
abstract: In order to quantify the activity of heterotrophic microorganism in membrane bioreactor (MBR) for drinking water treatment, biomass respiration potential (BRP) test and 2,3,5-triphenyl tetrazolium chloride-dehydrogenase activity (TTC-DHA) test were introduced and modified. A sludge concentration ratio of 5:1, incubation time of 2h, an incubation temperature that was close to the real operational temperature, and using a mixture of main AOC components as the substrate were adopted as the optimum parameters for determination of DHA in drinking water MBR. A remarkable consistency among BDOC removal, BRP and DHA for assessing biological performance in different MBRs was achieved. Moreover, a significant correlation between the BRP and DHA results of different MBRs was obtained. However, the TTC-DHA test was expected to be inaccurate for quantifying the biomass activity in membrane adsorption bioreactor (MABR), while the BRP test turned out to be still feasible in that case.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China. hit08hzs@163.com
authors.forename: Zheng-Shuang
authors.initials: ZS
authors.lastname: Han
authors.forename: Jia-Yu
authors.initials: JY
authors.lastname: Tian
authors.forename: Heng
authors.initials: H
authors.lastname: Liang
authors.forename: Jun
authors.initials: J
authors.lastname: Ma
authors.forename: Hua-Rong
authors.initials: HR
authors.lastname: Yu
authors.forename: Kai
authors.initials: K
authors.lastname: Li
authors.forename: An
authors.initials: A
authors.lastname: Ding
authors.forename: Gui-Bai
authors.initials: GB
authors.lastname: Li
mesh_terms: D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D005240:Feasibility Studies; D052836:Heterotrophic Processes; D008567:Membranes, Artificial; D010088:Oxidoreductases / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D012722:Sewage; D013696:Temperature; D013778:Tetrazolium Salts / Q000378:metabolism; D018508:Water Purification
chemical_list: D008567:Membranes, Artificial; D012722:Sewage; D013778:Tetrazolium Salts; C009591:triphenyltetrazolium; D010088:Oxidoreductases; D010100:Oxygen