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作 者:吴正松[1,2] 彭晨[1] 胡学斌[1] 李果[1] 李江[1] 唐世田 凌建军 梁艳杰
机构地区:[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]凌志环保有限公司,江苏宜兴214200 [3]重庆三峡环保(集团)有限公司,重庆401147
出 处:《土木建筑与环境工程》2013年第5期25-29,43,共6页Journal of Civil,Architectural & Environment Engineering
基 金:中央高校基本科研业务费(106112012012CDJZR215504);水体污染控制与治理科技重大专项(2012ZX07307-001)
摘 要:在污泥中投加2种表面活性剂SDS和SDBS进行预处理,从COD溶出率、溶解性糖类和蛋白质3个方面对预处理后污泥的性质进行了研究。结果表明,二者的加入极大地促进了污泥的水解,低剂量范围时SCOD随投加剂量增加而显著升高,投加剂量在50mg/g dw以上时SCOD增幅不明显。SCOD分别由初始时的638.5mg/L最高上升到6 446.8mg/L(SDBS)和4 857.2mg/L(SDS),溶出率分别由初始时的5.8%最高上升到37.3%(SDBS)和30.2%(SDS)。在0~150mg/gdw剂量范围内,溶解性糖类和蛋白质随两者投加剂量增加呈线性升高趋势,溶解性糖类分别由初始时的3.54mg/L最高上升到95.56mg/L(SDBS)和64.20mg/L(SDS)。溶解性蛋白质分别由初始时的11.72mg/L最高上升到706.30mg/L(SDBS)和541.08mg/L(SDS)。氨氮和VFA浓度也随投加量升高,氨氮浓度分别由初始时的4.21mg/L最高上升到130.33mg/L(SDBS)和102.74mg/L(SDS);VFA浓度分别由初始时的21.27mg/L最高上升到358.30mg/L(SDBS)和283.12mg/L(SDS)。The hydrolysis efficiency of excess sludge by the two surfactants (SDS and SDBS) was investigated according to COD dissolution rate, concentrations of soluble carbohydrate and soluble protein. The results showed that the hydrolysis of excess sludge was improved by using the two surfactants. When the dosage was in low range, SCOD concentration increased significantly with dosage increasing. But the increase of SCOD was not obvious when the dosage was higher than 50 mg/g dw. SCOD concentration increased from 638.5 mg/L to 6 446.8 mg/L (SDBS) and 4 857.2 mg/L (SDS) respectively. COD dissolution rate increased from 5.8% to 37.3% (SDBS) and 30.2%(SDS) respectively. With the increase of SDS and SDBS dosage in the range of 0~150 mg/g dw, the concentrations of the soluble protein and carbohydrate increased linearly. Soluble carbohydrate increased from 3. 54 mg/L to 95. 56 mg/L(SDBS) and 64. 20 mg/L(SDS) respectively. Soluble protein concentration increased from 11.72 mg/L to 706. 30 mg/L(SDBS) and 541.08 mg/L (SDS) respectively. The concentrations of ammonia and VFA also increased with the SDS and SDBS dosage. Ammoniaconcentrations increased from 4.21 mg/L to 130.33 mg/L(SDBS) and 102.74 mg/L(SDS) respectively. VFA concentrations increased from 21.27 mg/L to 358. 30 mg/L(SDBS) and 283. 12 mg/L(SDS) respectively.
分 类 号:X703.1[环境科学与工程—环境工程]
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