Sulfur-based autotrophic denitrification from the micro-polluted water.
Eutrophication caused by high concentrations of nutrients is a huge problem for many natural lakes and reservoirs. Removing the nitrogen contamination from the low C/N water body has become an urgent need. Autotrophic denitrification with the sulfur compound as electron donor was investigated in the biofilter reactors. Through the lab-scale experiment, it was found that different sulfur compounds and different carriers caused very different treatment performances. Thiosulfate was selected to be the best electron donor and ceramsite was chosen as the suitable carrier due to the good denitrification efficiency, low cost and the good resistibility against the high hydraulic loads. Later the optimum running parameters of the process were determined. Then the pilot-scale experiment was carried out with the real micro-polluted water from the West Lake, China. The results indicated that the autotrophic denitrification with thiosulfate as electron donor was feasible and applicable for the micro-polluted lake water.
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China. Electronic address: weilizhou@sjtu.edu.cn.
Weili
W
Zhou
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Xu
X
Liu
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Xiaojing
X
Dong
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Zheng
Z
Wang
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Ying
Y
Yuan
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Hui
H
Wang
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
Shengbing
S
He
D052818:Autotrophic Processes; D019149:Bioreactors; D057486:Carbon Cycle; D002681:China; D058440:Denitrification / Q000187:drug effects; D008956:Models, Chemical; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D013885:Thiosulfates / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D014876:Water Pollution; D018508:Water Purification / Q000379:methods
D013885:Thiosulfates; D014874:Water Pollutants, Chemical; D013455:Sulfur; D009584:Nitrogen
Autotrophic denitrification; HRT; Hydraulic loading rate; Micro-polluted water; Thiosulfate