紫外光-Fenton法处理剩余污泥  

Sewage sludge treated by UV-Fenton

作　　者：任晶晶[1] 许延营 孙德栋[1] 王玲玲[1] 马春[1] 董晓丽[1] 张新欣[1] 

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034 [2]青岛水务集团有限公司,山东青岛266000

出　　处：《大连工业大学学报》2015年第2期114-117,共4页Journal of Dalian Polytechnic University

摘　　要：利用紫外光(UV)-Fenton法氧化处理城市剩余污泥,并通过测量污泥破解率、上清液的SCOD、多聚糖、蛋白质以及总氮浓度表征污泥的破解情况,测量污泥过滤比阻(SRF)表征污泥脱水性能的变化。结果表明,pH为3、反应时间为2h,H2O2投加量为4g/L和Fe2+投加量为0.06g/L是紫外光-Fenton氧化处理供试污泥的适宜条件。在适宜处理条件下,污泥破解率为20.8%,污泥破解后,微生物细胞内有机物释放到溶液中,使污泥上清液中的SCOD由126mg/L增加到848mg/L,多聚糖质量浓度由33.4mg/L增加到119 mg/L,蛋白质量浓度由41.2 mg/L增加到82.6 mg/L。总氮含量增加了1.62倍。SRF由8.58×109 s2/g下降至3.99×109 s2/g。紫外光-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。Excess sewage sludge was oxidized by UV-Fenton reaction and characterized by concentrations of soluble chemical oxygen demand （SCOD）, polysaecharide, protein and TN of sludge supernatant. The sludge dewater ability was described by specific resistance to filtration （SRF）. Results showed that the SS dissolution ratio could reach to 20.8% under the optimal conditions as follows., pH = 3,reaction time 2 h,H202 dosage 4 g/L, Fe2＋ dosage 0.06 g/L. After treatment, the concentrations of SCOD, polysaccharide and protein of the sludge supernatant was increased from 126, 33.4 and 41.2 to 848, 118.9 and 82.6 rag/L, respectively. The TN concentration was increased by 1.62 times and SRF concentration was decreased from 8.58 × 109 to 3.99 × 109 s2/g. The sludge dewater ability was obviously enhanced while the sewage sludge was efficiently disintegrated by UV-Fenton oxidation, which was benefit for further sewage sludge reduction.

关 键 词：剩余污泥 紫外光 FENTON试剂 预处理 

分 类 号：X703.1[环境科学与工程—环境工程]