EFFECTS OF TEMPERATURE AND SALINITY ON MARINE ANAMMOX BACTERIA CULTIVATION USING NON-WOVEN FABRIC BIOMASS CARRIER
Abstract
The investigation of the influence of cultivation conditions on anammox process plays an important role in overcoming the slowly doubling time of anammox bacteria as well as in helping to better operate the wastewater treatment falicity. This study investigated the effects of temperature and salinity on anammox activity. Anammox reactor was inoculated with sediment sample from sea-based waste disposal site under the continuous condition with non-woven fabric biomass carrier. Influent NH4+ and NO2- concentration was maintained at 170 ppm as N of each, corresponding to an NLR of 0.34 kg-TN m-3day-1. Different concentrations of NaCl and temperature values were applied. Salinity and temperature showed great effects on anammox activity at NaCl concentration and temperature of 0 g/L and 5 degrees Celsius, respectively. It seems that there hadn’t been any microbial community structure shift under various temperatures. DNA analysis confirmed the coexistence of anammox process and other processes with the predominance where Planctomycete UKU-1 was dominant with high similarity in comparison with Candidatus Scalindua wagneri. It suggested again that salinity and temperature had the impact mainly on anammox activity, however, there hasn’t been any influence on microbial community structure.
Keyworks: anaerobic ammonium oxidation; marine anammox bacteria; temperature; salinity; nonwoven fabric.
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