PAC Addition on Immersed Ultrafiltration Membrane for the Treatment of Raw Water Containing Taste and Odor Compounds

A hybrid process of conventional treatment UF-BPAC (biological powder activated carbon addition on immersed ultrafiltration membrane bioreactor) was evaluated for the treatment of taste and odor in algal-rich water simulated. The results confirmed that in the immersed ultrafiltration membrane bioreactor PAC had sufficient adsorption and long-term biodegradation of dissolved organic materials which cannot be removed by ultrafiltration membrane alone. UF-BPAC processes could intensify the conventional treatment. Through the advanced treatment of UF-BPAC, the average removal ratios of DOC and UV254 increased 19.6% and 30% compared with the conventional treatment process, respectively. Perfect ammonia removal ratio (82.5±5.5%) was also recieved through hybriding the conventional treatment process and UF-PAC process. The major taste and odor compounds from the raw water, 2-MIB and geosmin both fell below the odor threshold, which guaranteed the effluent quality.