研究报告
杨涛,张静,何帅,张悦,马天佑,杨开.投加FeSO4对序批式生物膜反应器中DHA、EPS和处理效果的影响[J].环境科学学报,2016,36(8):2838-2843
投加FeSO4对序批式生物膜反应器中DHA、EPS和处理效果的影响
- Effects of ferrous sulfate(FeSO4) on dehydrogenase activity(DHA), amount of extracellular polymeric substances(EPS) and the treatment efficiency in a sequencing batch biofilm reactor(SBBR)
- 基金项目：国家“十二五”科技支撑计划项目（No.2014BAL04B04,2015BAL01B02）
- 作者
- 单位
- 杨涛
- 武汉大学土木建筑工程学院, 武汉 430072
- 张静
- 武汉大学土木建筑工程学院, 武汉 430072
- 何帅
- 武汉大学土木建筑工程学院, 武汉 430072
- 张悦
- 水利部长江水利委员会, 武汉 430072
- 马天佑
- 湖北电力勘测设计院, 武汉 430072
- 杨开
- 武汉大学土木建筑工程学院, 武汉 430072
- 摘要：针对化学协同生物除磷过程，研究了序批式生物膜反应器（SBBR）中FeSO4对悬浮相活性污泥脱氢酶活性（DHA）、胞外聚合物（EPS）及系统处理效果的影响.结果表明，少量FeSO4对DHA和EPS的分泌具有促进作用，但最佳投加量不一致，分别为0.10 mmol·L-1和0.20 mmol·L-1；大量的FeSO4则会引发抑制.FeSO4投加量少于0.30 mmol·L-1时会使污泥MLVSS、MLVSS/MLSS增加，超过0.30 mmol·L-1时则使MLVSS、MLVSS/MLSS下降，但MLSS和SVI随着FeSO4投加量的增加分别持续增加和下降.FeSO4对COD和TN的去除具有抑制作用，但并不显著，去除率分别在77%和72%左右；TP的去除效果明显改善，在投加量为0.30 mmol·L-1时效果最好.投加FeSO4协同生物除磷时建议最佳投加量为0.30 mmol·L-1，此时污泥DHA被轻微抑制，但污泥浓度、EPS、TP去除率均已达到最大，出水水质满足一级A排放标准.
- Abstract：Effects of ferrous sulfate (FeSO4) on dehydrogenase activity (DHA), amount of extracellular polymeric substances (EPS) and the treatment efficiency in a sequencing batch biofilm reactor (SBBR) were investigated. Compared with the controlling stage, without any additions, a small amount of FeSO4 accelerated the secretion of DHA and EPS, with the optimal dosages of 0.10 and 0.20 mmol·L-1, respectively. While higher amount of FeSO4 would inhibit the process. Approximately, the concentrations of MLVSS and MLVSS/MLSS increased with increasing FeSO4 dosage less than 0.30 mmol·L-1. The concentrations of MLSS increased persistently with increasing FeSO4 dosage, and SVI changed conversely. The addition of FeSO4 slightly inhibited the removal efficiencies of COD and TN, which were 77% and 72%, respectively. However, TP removal efficiency obtained a prominent improvement, indicating that biological phosphorus removal of the SBBR system was enhanced by chemical flocculant. The optimal dosage of FeSO4 was 0.30 mmol·L-1. Even though the DHA was slightly inhibited, the sludge concentration, amount of EPS and TP removal efficiency were strengthened, and high quality of effluent were achieved.
- Key words：ferrous sulfate auxiliary chemical phosphorus removal dehydrogenase activity extracellular polymeric substances
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