Kinetic development and evaluation of membrane sequencing batch reactor (MSBR) with mixed cultures photosynthetic bacteria for dairy wastewater treatment

• Published in: Journal of environmental management Vol. 91; no. 5; pp. 1161 - 1168
• Main Authors: Kaewsuk, Jutamas, Thorasampan, Worachat, Thanuttamavong, Monthon, Seo, Gyu Tae
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.05.2010
• Subjects: Bacteria; Biodegradation, Environmental; bioreactors; Bioreactors - microbiology; chemical oxygen demand; Crack opening displacement; Culture; dairy cattle; Dairy industry; Dairy wastewater; Dairying; Design; effluents; Engineering; Engineering design; equations; Experiments; Gram-Negative Oxygenic Photosynthetic Bacteria; Industrial Waste; Kinetic coefficients; Kinetics; Light; Membrane sequencing batch reactor (MSBR); Monod's kinetic; Oxygen; Photosynthetic bacteria; pollution load; Reactors; Sequencing; Submerged membrane filtration; Waste Disposal, Fluid - methods; Waste management; Wastewater treatment; Water Pollutants, Chemical; Water Purification - methods; Water treatment; Membrane sequencing batch reactor (MSBR); Kinetic coefficients; Dairy wastewater; Submerged membrane filtration; Monod's kinetic; Photosynthetic bacteria
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2010.01.012

This experimental study was conducted to evaluate a membrane sequencing batch reactor (MSBR) with mixed culture photosynthetic bacteria for dairy wastewater treatment. The study was undertaken in two steps: laboratory and pilot scale experiments. In the first step, kinetics analysis of the MSBR was carried out in a laboratory scale experiment with influent COD concentration of 2500 mg/L. The pilot scale experiment was conducted to investigate the performance of the MSBR and checked the suitability of the kinetics for an engineering design. The kinetic coefficients K s, k, k d, Y and μ m were found to be 174-mg-COD/L, 7.42/d, 0.1383/d, 0.2281/d and 1.69/d, respectively. There were some deviations of COD removal efficiency between the design value and the actual value. From the kinetics estimation, COD effluent from the design was 27 mg/L while the average actual COD effluent from the experiment was 149 mg/L. Due to the different light source condition, the factors relating to light energy (i.e. L f and IR %) must be incorporated into engineering design and performance prediction with these kinetic coefficients of the photosynthetic MSBR.