作　　者： ; ; ; ; ; ; (张爱菊）;

机构地区： 湖南大学环境科学与工程学院

出　　处： 《环境工程学报》 2011年第11期2600-2604,共5页

摘　　要： 利用紫外光-Fenton(光-Fenton)氧化处理城市剩余污泥,通过上清液的SCOD、多聚糖以及蛋白质浓度表征污泥胞外聚合物(EPS)的破解情况,通过污泥过滤比阻(SRF)和滤饼含水率表征污泥脱水性能的变化。结果表明,光-Fenton氧化破解污泥EPS和改善污泥脱水性能的效能明显优于单独Fenton反应和单独紫外光照射处理。pH为3、反应时间为2h,H2 O2投加量为4 g/L和Fe2+投加量为0.6 mg/L是光-Fenton氧化处理供试污泥的适宜条件。在适宜处理条件下,污泥上清液中的SCOD、多聚糖和蛋白质浓度分别由67.46 mg/L、12.53 mg/L和8.62 mg/L增加到568.12 mg/L、448.62 mg/L和292.94 mg/L;SRF和滤饼含水率分别由2.4×109 s2/g和88.52%下降至5.26×108 s2/g和76.36%。光-Fenton反应在有效破解污泥的同时,提高了污泥的脱水性能,有利于污泥的减量化。 Photo-Fenton reaction was used to oxidize excess sewage sludge, in which sludge EPS disintegration was characterized by concentrations of soluble chemical oxygen demand （SCOD） , polysaccharide and protein of sludge supernatant, and sludge dewaterability was described by specific resistance to filtration （SRF） and moisture content of sludge cake. Results showed that the effect of EPS disintegration and sludge dewaterability improvement by photo-Fenton reaction was stronger than that by single Fenton reaction or single UV radiation. The optimal conditions for photo-Fenton oxidation of the experimental sludge were as follows, pH = 3, reaction time =2 h, H202 dosage =4 g/L and Fe^2＋ dosage =0.6 rag/L, respectively. Under these conditions, the concentrations of SCOD, polysaecharide and protein of the sludge supernatant increased from 67.46 mg/L, 12.53 mg/L and 8.62 mg/L to 568.12 mg/L, 448.62 mg/L and 292.94 mg/L, respectively; and the SRF and the moisture content of sludge cake reduced from 2.4 × 10^9 S^2/g and 88.52% to 5.26× 10^8s^2/g and 76.36% , respectively. While the sewage sludge was efficiently viously enhanced by photo-Fenton oxidation, which disintegrated, the sludge dewaterability improvement was obbenefits further sewage sludge reduction.

关 键 词： 光 胞外聚合物 多聚糖 蛋白质 污泥过滤比阻 滤饼含水率

领　　域： [环境科学与工程]