摘要
为了研究投加化学除磷药剂对活性污泥系统的影响,利用间歇实验考察FeCl3·6H2O投加对系统出水水质、活性污泥胞内贮存物以及胞外聚合物(EPS)含量和组分的影响.结果表明:随着投加Fe3+质量浓度的增加出水COD质量浓度逐渐降低,而系统对氨氮的去除效果影响不大;当Fe3+投加量小于8mg/L时,出水磷酸盐质量浓度由2.32降至0.24mg/L;当投加量超过8mg/L时,出水磷酸盐质量浓度则增加到1.83mg/L,PHA及糖原的合成和降解受到抑制,每g混合液体挥发性悬浮固体(VSS)中PHA水解量和糖原的合成量分别从53.11和83.53mg/g下降到11.12和25.29mg/g;铁盐的投加会影响不同类型EPS(总EPS、溶解性EPS、松散结合型EPS和紧密结合型EPS)的含量,但不会改变不同类型EPS的组分.
To investigate the influences of chemical phosphorous removal substance on activated sludge system, batch experiments were conducted to investigate the influences of ferric chloride on effluent quality, intracellular storage and extracellular polymeric substance （EPS）. The results indicate that the effluent COD （chemical oxygen demand） concentration decreases with the increase of Fe3＋ concentration, while nitrogen removal efficiency changes little. When Fe3＋ concentration is helow 8 mg/L, the effluent phosphorus concentration reduces from 2.32 to 0.24 mg/L. However, when it is above 8 mg/L, the effluent phosphorus concentration rises to 1.83 mg/L and the synthesis and degradation of PHA （polyhydroxyal kanoate） and glycogen are both inhibited. In aerobic phase, PHA deg- radation and glycogen synthesis decrease from 53.11 and 83.53 to 11.12 and 25.29 mg/g VSS （volatile suspended solid）, respectively. Furthermore, ferric salts affect the content of EPS （total EPS, soluble EPS, loose bound-EPS and tight bound-EPS）, but have no effect on EPS compositions.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第5期101-106,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51008112)
"十二五"国家科技重大水专项资助项目(2012ZX07101-003
2011ZX07301-002)
关键词
活性污泥
化学除磷
胞内贮存物
胞外聚合物
间歇实验
activated sludge
chemical phosphorous removal
intracellular storage
extracellular polymeric substance
batch experiment
