title: The effects of Bacillus subtilis on nitrogen recycling from aquaculture solid waste using heterotrophic nitrogen assimilation in sequencing batch reactors.
abstract: A sequencing batch reactor (SBR) supplied with Bacillus subtilis (treatment group) was employed to treat the sludge from a re-circulating aquaculture system (RAS). The crude protein content of bio-flocs from the treatment group increased from 21.52%±1.5% to 29.65%±13.34%, which was 23.97%±11.62% greater than that of the SBRs without B. subtilis (control group). The removal rate of dissolved inorganic nitrogen (RR(DIN)) for the treatment group was 0.41±0.079 mg L(-1)d(-1), which was 1.17 times greater than that of the control group. The utility rate of total organic nitrogen (UR(TON)) for the treatment group was 1.42±0.33 mg L(-1)d(-1), which was 1.71 times greater than the control. The removal rate of dissolved organic carbon (RR(DOC)) for the treatment group was 138.39±7.77 mg L(-1)d(-1), which was 1.95 times greater than the control. The extra-cellular polymer substance (EPS) was primarily composed of polysaccharides. The flocs volume after 5 min (FV-5 min) reached 22.67%±2.08% at 19 days.
authors.affiliation: College of Fishery & Life Science, Shanghai Ocean University, Shanghai 201306, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Lu
authors.forename: Hongxin
authors.initials: H
authors.lastname: Tan
authors.forename: Guozhi
authors.initials: G
authors.lastname: Luo
authors.forename: Wenyan
authors.initials: W
authors.lastname: Liang
mesh_terms: D017756:Aquaculture; D001412:Bacillus subtilis / Q000378:metabolism*; D019149:Bioreactors; D009584:Nitrogen / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*
chemical_list: D009584:Nitrogen