期刊
BIORESOURCE TECHNOLOGY
卷 222, 期 -, 页码 33-38出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.09.102
关键词
Photosynthetic bacteria; Digested swine wastewater; Optimization; Mixed culture; Photoheterotrophic
资金
- Department of Science & Technology of Hunan Province of China [2014GK1012]
- Department of Education of Hunan Province [801210003]
- International S&T Cooperation Program of China [2015DFG92750]
- National Natural Science Foundation of China [51278464, 51478172, 51521006]
Two strains of photosynthetic bacteria, Rhodobacter blasticus and Rhodobacter capsulatus, were used in this work to investigate the feasibility of using photosynthetic bacteria for the treatment of anaerobically digested swine wastewater. The effects of crucial factors which influence the pollutants removal efficiency were also examined. Results showed that anaerobically digested swine wastewater could be treated effectively by photosynthetic bacteria. The treatment efficiency was significantly higher by the mixed photosynthetic bacteria than that by any unitary bacterium. The optimal treatment condition by mixed bacteria was inoculation of 10.0% (v/v) of the two bacteria by 1: 1, initial pH of 7.0 and initial chemical oxygen demand of 4800 mg L-1. Under these conditions, the removal rate of chemical oxygen demand was 83.3%, which was 19.3% higher than when using Rhodobacter blasticus or 10.6% higher than when using Rhodobacter capsulatus separately. This mixed photosynthetic bacteria achieved high chemical oxygen demand removal and cell yields. (C) 2016 Elsevier Ltd. All rights reserved.
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