Rapid granulation using calcium sulfate and polymers for refractory wastewater treatment in up-flow anaerobic sludge blanket reactor

被引：37
|
作者：
Liang, Jiahao [1 ]
Wang, Qinghong [1 ]
Yoza, Brandon A. [2 ]
Li, Qing X. [3 ]
Chen, Chunmao [1 ]
Ming, Jie [1 ,4 ]
Yu, Jingshi [1 ]
Li, Jin [1 ]
Ke, Ming [1 ]
机构：
[1] China Univ Petr, State Key Lab Heavy Oil Proc, State Key Lab Petr Pollut Control, Beijing 102249, Peoples R China
[2] Univ Hawaii Manoa, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA
[3] Univ Hawaii Manoa, Dept Mol Biosci & Bioengn, Honolulu, HI 96822 USA
[4] Univ Tsukuba, Grad Sch Life & Environm Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577, Japan
来源：
BIORESOURCE TECHNOLOGY | 2020年 / 305卷
基金：
中国国家自然科学基金;
关键词：
Granulation; UASB; Wastewater; Guar gum; Cationic polyacrylamide; Wastewater treatment; UASB REACTOR; START-UP; PHENOL; DEGRADATION; PERFORMANCE; BED; METHANOGENESIS; OPERATION; NOV;
D O I：
10.1016/j.biortech.2020.123084
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Long start-up period and slow granulation are major restraints in up-flow anaerobic sludge blanket (UASB) reactors for the treatment of refractory wastewater. In this study, Calcium sulfate (CaSO4), CaSO4/guar gum (GG), and CaSO4/cationic polyacrylamide (CPAM) were used to enhance granulation during the treatment of phenolic wastewaters in UASB reactors. Use of CaSO4, CaSO4/GG, and CaSO4/CPAM increased formation of granules (> 0.25 mm) by 7%, 21% and 40%, respectively, after 90 days in comparison with the control. Use of CaSO4/GG and CaSO4/CPAM at an organic loading rate of 2.89 kg chemical oxygen demand (COD) m(-3) d(-1) increased the COD removal efficiency by 9% and 3%, respectively, in comparison with the control (75%). The CaSO4 enhanced the granulation rate as nuclei and the subsequent dissolution of CaSO4 improves the activity of methanogens. Polymers facilitated bacteria adhesion and improved the diversity of phenols-degrading bacteria. This study describes a new method for rapid granulation in UASB reactors when treating toxic and refractory wastewaters.
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页数：10
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