Excess sludge reduction using pilot-scale lysis-cryptic growth system integrated ultrasonic/alkaline disintegration and hydrolysis/acidogenesis pretreatment

被引：75
作者：
Ma, Huaji [1 ,2 ]
Zhang, Shuting [1 ]
Lu, Xuebin [1 ]
Xi, Bo [1 ]
Guo, Xingli [1 ]
Wang, Han [1 ]
Duan, Jingxiao [1 ]
机构：
[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
[2] Tianjin Inst Urban Construct, Tianjin Key Lab Aquat Sci & Technol, Sch Environm & Municipal Engn, Tianjin 300384, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2012年 / 116卷
关键词：
Excess sludge reduction; Cryptic growth; Ultrasonication; Alkaline treatment; Hydrolysis/acidogenesis; WASTE ACTIVATED-SLUDGE; COMBINED ALKALINE; MINIMIZATION; RECOVERY; MODEL;
D O I：
10.1016/j.biortech.2012.03.091
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
A pilot-scale lysis-cryptic growth system was built and operated continuously for excess sludge reduction. Combined ultrasonic/alkaline disintegration and hydrolysis/acidogenesis were integrated into its sludge pretreatment system. Continuous operation showed that the observed biomass yield and the sludge reduction efficiency of the lysis-cryptic growth system were 0.27 kg VSS/kg COD consumed and 56.5%, respectively. The water quality of its effluent was satisfactory. The sludge pretreatment system performed well and its TCOD removal efficiency was 7.9% which contributed a sludge reduction efficiency of 2.1%. The SCOD, VFA, TN, NH4+-N, TP and pH in the supernatant of pretreated sludge were 1790 mg/L, 1530 mg COD/L, 261.1 mg/L, 114.0 mg/L, 93.1 mg/L and 8.69, respectively. The total operation cost of the lysis-cryptic growth system was $ 0.186/m(3) wastewater, which was 11.4% less than that of conventional activated sludge (CAS) system without excess sludge pretreatment. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：441 / 447
页数：7
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