[Effect of COD/SO4(2-) ratio on the ecological characteristic in acidogenic sulfate-reducing reactor].
Continuous-flow experiment was conducted in acidogenic sulfate-reducing reactor, which was fed with high strength sulfate wastewater, to study the change law of pH value, ORP (oxidation reduction potential), VFAs (volatile fat acids), ALK (alkalinity) and the distribution of preponderant populations subjected by decreasing COD/SO4(2-) ratio from 4.2 to 2.0. It was demonstrated that during this course of change, ORP and ALK increased, while pH value and the proportion of acetic acid accounting for VFAs decreased significantly, and the type of climax community was changed from stable-type with high COD/SO4(2-) ratio to sub-stable-type with low COD/SO4(2-) ratio, but it was still belonged to typical acetic-acid type climax community.
Ren
Nanqi
N
Research Center of Environmental Biotechnology, Harbin Institute of Technology, Harbin 150090, China. jidx3@public.hr.hl.cn
Wang
Aijie
A
D019149:Bioreactors; D004463:Ecology; D013431:Sulfates / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D013431:Sulfates