scholarly journals The effect of activated carbon addition on membrane bioreactor processes for wastewater treatment and reclamation – A critical review

2015 ◽  
Vol 185 ◽  
pp. 399-410 ◽  
Author(s):  
George Skouteris ◽  
Devendra Saroj ◽  
Paraschos Melidis ◽  
Faisal I. Hai ◽  
Sabèha Ouki
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Critical Review ◽  
Membrane Bioreactor ◽  
Carbon Addition

A critical review on saline wastewater treatment by membrane bioreactor (MBR) from a microbial perspective

Chemosphere ◽  
2019 ◽  
Vol 220 ◽  
pp. 1150-1162 ◽  
Author(s):  
Xu Tan ◽  
Isaac Acquah ◽  
Hanzhe Liu ◽  
Weiguo Li ◽  
Songwen Tan
Keyword(s):  
Wastewater Treatment ◽  
Critical Review ◽  
Membrane Bioreactor ◽  
Saline Wastewater

Factors affecting trihalomethane formation and speciation during chlorination of reclaimed water

2015 ◽  
Vol 72 (4) ◽  
pp. 616-622 ◽  
Author(s):  
Defang Ma ◽  
Baoyu Gao ◽  
Yan Wang ◽  
Qinyan Yue ◽  
Qian Li
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Correlation Coefficient ◽  
Contact Time ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Reclaimed Water ◽  
Neutral Condition ◽  
Municipal Wastewater Treatment ◽  
Factors Affecting

A hybrid process with membrane bioreactor (MBR) and powdered activated carbon (PAC), PAC/MBR, was used for real municipal wastewater treatment and reuse. The roles of chlorine dose, contact time, pH and bromide in trihalomethane (THM) formation and speciation during chlorination of the reclaimed water were investigated. Total trihalomethane (TTHM) yield exponentially increased to maximum with increasing chlorine dose (correlation coefficient R2 = 0.98). Prolonging substrate chlorine contact time significantly promoted TTHM formation. Less than 40% of THMs formed in the first 24 h, indicating that the PAC/MBR effluent organic matters were mostly composed of slow-reacting precursors. Increasing pH and bromide concentration facilitated THM formation. Higher chlorine dose and contact time enhanced chloro-THM formation. The bromo-THM formation was favored at near neutral condition. Despite the variation of chlorine dose, contact time and pH, the yield of THM species in order was usually CHCl3 > CHBrCl2 > CHBr2Cl > CHBr3. However, THM speciation shifted from chlorinated species to brominated species with increasing bromide concentration.

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