Effects of Fe2+ concentration on biomass accumulation and energy metabolism in photosynthetic bacteria wastewater treatment.
Effects of Fe2+ concentration on biomass accumulation and energy metabolism in photosynthetic bacteria wastewater treatment.
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DOI：
10.1016/j.biortech.2012.05.133
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发表时间：
2012-09
影响因子：
11.4
通讯作者：
Pan Wu;Guangming Zhang;Jianzheng Li;Haifeng Lu;Wei Zhao
中科院分区：
文献类型：
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作者：
Pan Wu;Guangming Zhang;Jianzheng Li;Haifeng Lu;Wei Zhao
光合细菌（PSB）废水处理具有生物量回收和污染物去除的优点.以光合细菌（PSB）为处理对象，研究了不同Fe 2+浓度对光合细菌能量代谢的影响。结果表明，Fe 2+的最佳投加量为20 mg/L。最佳Fe ~（2+）投加量可显著提高生物产量（4800.9mg/L）和COD去除率（93.4%）。投加10- 30 mg/L的Fe ~（2+）可缩短废水的水力停留时间。机理分析表明，不同Fe 2+浓度对生物量积累的影响机制不同。Fe 2+构成脱氢酶活性中心，适量添加Fe 2+可通过上调脱氢酶活性提高能量生产，有利于生物量的积累。当Fe ~（2+）浓度为20 mg/L时，光合细菌的脱氢酶活性和ATP产量分别提高了48.1%和42.4%。但过量添加Fe ~（2+）会抑制脱氢酶活性，不利于生物量的积累。
Photosynthetic bacteria (PSB) wastewater treatment has the advantage of biomass recovery in together with pollutant removal. The effects of different Fe2+concentrations on the biomass accumulation through regulating energy metabolism were investigated in PSB wastewater treatment. Results showed that the optimal Fe2+dosage was 20mg/L. Optimal Fe2+content could significantly increase the biomass production (4800.9mg/L) and COD removal (93.4%). Addition of 10–30mg/L Fe2+could shorten the hydraulic retention time of wastewater. Mechanism analyses revealed that different Fe2+concentrations had different impacting mechanisms on biomass accumulation. Fe2+constituted the dehydrogenase active center, and therefore proper addition of Fe2+could improve energy production by up-regulating dehydrogenase activity, which was beneficial for biomass accumulation. With 20mg/L Fe2+, the dehydrogenase activity and ATP production of PSB were improved by 48.1% and 42.4%, respectively. However, excessive addition of Fe2+was harmful for biomass accumulation since the ions inhibited the dehydrogenase activity.