title: Effect of PAC dosage in a pilot-scale PAC-MBR treating micro-polluted surface water.
abstract: To address the water scarcity issue and advance the traditional drinking water treatment technique, a powdered activated carbon-amended membrane bioreactor (PAC-MBR) is proposed for micro-polluted surface water treatment. A pilot-scale study was carried out by initially dosing different amounts of PAC into the MBR. Comparative results showed that 2g/L performed the best among 0, 1, 2 and 3g/L PAC-MBR regarding organic matter and ammonia removal as well as membrane flux sustainability. 1g/L PAC-MBR exhibited a marginal improvement in pollutant removal compared to the non-PAC system. The accumulation of organic matter in the bulk mixture of 3g/L PAC-MBR led to poorer organic removal and severer membrane fouling. Molecular weight distribution of the bulk liquid in 2g/L PAC-MBR revealed the synergistic effects of PAC adsorption/biodegradation and membrane rejection on organic matter removal. Additionally, a lower amount of soluble extracellular polymer substances in the bulk can be secured in 21 days operation.
authors.affiliation: Delft University of Technology, P. O. Box 5048, 2600 GA Delft, The Netherlands. Electronic address: j.hu-1@tudelft.nl.
authors.forename: Jingyi
authors.initials: J
authors.lastname: Hu
authors.affiliation: Delft University of Technology, P. O. Box 5048, 2600 GA Delft, The Netherlands.
authors.forename: Ran
authors.initials: R
authors.lastname: Shang
authors.affiliation: Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 200092 Shanghai, China.
authors.forename: Huiping
authors.initials: H
authors.lastname: Deng
authors.affiliation: Delft University of Technology, P. O. Box 5048, 2600 GA Delft, The Netherlands.
authors.forename: Sebastiaan G J
authors.initials: SG
authors.lastname: Heijman
authors.affiliation: Delft University of Technology, P. O. Box 5048, 2600 GA Delft, The Netherlands.
authors.forename: Luuk C
authors.initials: LC
authors.lastname: Rietveld
mesh_terms: D000641:Ammonia / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002606:Charcoal / Q000737:chemistry*; D008567:Membranes, Artificial; D008970:Molecular Weight; D009930:Organic Chemicals / Q000302:isolation & purification; D010539:Permeability; D010865:Pilot Projects; D011134:Polysaccharides / Q000032:analysis; D011208:Powders; D012995:Solubility; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*; D060753:Water Quality
chemical_list: D008567:Membranes, Artificial; D009930:Organic Chemicals; D011134:Polysaccharides; D011208:Powders; D014874:Water Pollutants, Chemical; D002606:Charcoal; D000641:Ammonia
keywords: MBR; Micro-polluted surface water; Optimal dosage; PAC