Hybrid process of BAC and sMBR for treating polluted raw water.
The hybrid process of biological activated carbon (BAC) and submerged membrane bioreactor (sMBR) was evaluated for the drinking water treatment from polluted raw water, with the respective hydraulic retention time of 0.5 h. The results confirmed the synergetic effects between the BAC and the subsequent sMBR. A moderate amount of ammonium (54.5%) was decreased in the BAC; while the total removal efficiency was increased to 89.8% after the further treatment by the sMBR. In the hybrid process, adsorption of granular activated carbon (in BAC), two stages of biodegradation (in BAC and sMBR), and separation by the membrane (in sMBR) jointly contributed to the removal of organic matter. As a result, the hybrid process managed to eliminate influent DOC, UV(254), COD(Mn), TOC, BDOC and AOC by 26.3%, 29.9%, 22.8%, 27.8%, 57.2% and 49.3%, respectively. Due to the pre-treatment effect of BAC, the membrane fouling in the downstream sMBR was substantially mitigated.
Tian
Jia-yu
JY
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China. tjy800112@163.com
Chen
Zhong-lin
ZL
Yang
Yan-ling
YL
Liang
Heng
H
Nan
Jun
J
Wang
Zhao-zhi
ZZ
Li
Gui-bai
GB
D001419:Bacteria / Q000302:isolation & purification; D019149:Bioreactors / Q000382:microbiology; D002606:Charcoal / Q000737:chemistry*; D005591:Chemical Fractionation; D008567:Membranes, Artificial; D009391:Nephelometry and Turbidimetry; D009566:Nitrates / Q000302:isolation & purification; D009930:Organic Chemicals / Q000302:isolation & purification; D000644:Quaternary Ammonium Compounds / Q000302:isolation & purification; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D014876:Water Pollution / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D008567:Membranes, Artificial; D009566:Nitrates; D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; D002606:Charcoal