| 凌琪,鲍超,伍昌年,方涛,赵秋燕,孙冰香,张睿,孔张成,杨浩.改性煤气化灰渣调理污泥脱水性能研究[J].安徽建筑大学学报,2016,24(3):50-53 |
| 改性煤气化灰渣调理污泥脱水性能研究 |
| Study on the Effect of Modified Coal Gasification Slag on Sludge Dewatering Performance |
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| DOI：10.11921/j.issn.2095-8382.20160311 |
| 中文关键词: 改性煤气化灰渣 污泥脱水性能 胞外聚合物（EPS） 粒径 |
| 英文关键词: the modified coal gasification slag sludge dewaterability extracellular polymeric substances(EPS) particle size. |
| 基金项目:国家水体污染控制与治理科技重大专项课题(2014ZX07405003) |
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| 中文摘要: |
| 采用改性煤气化灰渣对污泥进行调理，通过测定污泥比阻(SRF)、毛细吸水时间（CST）、污泥上清液中胞外聚合物（EPS）含量、Zeta电位，同时结合污泥粒径分析，研究了不同煤气化灰渣投加量对污泥脱水性能影响。结果表明：在改性煤气化灰渣投加量为污泥干重的20%时，污泥脱水性能达到最好，SRF、CST分别为5.11×1011m·kg、51.2s；随投加量增加，污泥上清液中EPS含量减少，Zeta电位减小，调理后污泥粒径中d10增大，而d50、d90减小。改性煤气化灰渣调理脱水性能的机理可能是通过构建透水骨架、吸附架桥及静电中作用共同实现的。该研究可为改性煤气化灰渣的工业应用提供一定的理论依据。 |
| 英文摘要: |
| The effect of dosage of modified coal gasification slag(MCGS) on sludge dewatering performance was investigated and some parameters were determined such as specific resistance to filtration (SRF), capillary suction time(CST), the concentration of extracellular polymeric substances(EPS) in the supernatant, Zeta potential and the size of sludge in the experiment. The results showed that sludge dewatering achieved the best performance with the ratio of MCGS to dewatered sludge of 20%. SRF and CST were 5.11×1011m.kg, 51.2s, respectively. The EPS concentration and Zeta potential decreased with the dosage of MCGS increased. The particle size of dewatered sludge showed that d10 increased ,while d50 and d90 decreased. The mechanism of sludge dewatering conditioned by MCGS maybe based on the actions of skeleton builders, adsorption bridging and electrical neutralization. The results could provide theoretical instruction for the industrial application of MCGS. |
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