title: Dynamic comparison on the usage of probiotics in organic wastewater treatment under aerobic conditions in a diurnal environment.
abstract: This study aims at evaluating and comparing pollution removal in wastewater treatment via the use of probiotics alone or in combination under aerobic conditions in diurnal cycles. Herein, 650 mL of organic wastewater was stored in 1-L conical flasks and then randomly divided into three treatment groups, each experiment was repeated three times. Group A was supplemented with 2% (v/v) photosynthetic bacteria (PSB; Rhodopseudomonas palustris) alone; group B was supplemented with 2% (v/v) B. subtilis alone; and group C was supplemented with 1% (v/v) PSB and 1% (v/v) B. subtilis. Results showed that the pH increases were in the order: group A < group C < group B. The performance of the probiotics in terms of ammonia nitrogen and total nitrogen (TN) removal was in the order: group A < group C < group B, whereas in terms of total organic matter (TOC) and total carbon (TC) removal, the order was group C < group B < group A. These results showed that the effect of probiotics combination treatment on ammonia nitrogen and TN removal was better than that of using B. subtilis alone, but worse than that of using PSB alone. The effect of B. subtilis alone treatment on TOC and TC removal was better than that of using PSB alone, but the combination of PSB and B. subtilis showed greater benefits on TOC and TC removal.
  
  
  
  Photosynthetic bacteria and B. subtilis were used in this study to investigate carbon and nitrogen metabolism via the use of different probiotics and then study further on comparing and achieving the best pollution removal performance in probiotics alone or in combination treatment. To make observations realistic, the experiments were conducted under aerobic conditions in a diurnal cycle environment.
authors.affiliation: a College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , People's Republic of China.|b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Liu
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Guoqin
authors.initials: G
authors.lastname: Li
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Junda
authors.initials: J
authors.lastname: Shen
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Zhengrong
authors.initials: Z
authors.lastname: Tao
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Tian
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.affiliation: a College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , People's Republic of China.
authors.forename: Chunmei
authors.initials: C
authors.lastname: Li
authors.affiliation: b Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science , Hangzhou , People's Republic of China.
authors.forename: Lizhi
authors.initials: L
authors.lastname: Lu
mesh_terms: D000641:Ammonia / Q000032:analysis / Q000378:metabolism; D001412:Bacillus subtilis / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D002940:Circadian Rhythm; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism; D019936:Probiotics / Q000378:metabolism*; D012241:Rhodopseudomonas / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry* / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D000641:Ammonia; D002244:Carbon; D009584:Nitrogen; D062065:Wastewater; D014874:Water Pollutants, Chemical