1 the highest of methylene blue removal was 9931

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Unformatted text preview: elim@usm.my The objective of this study is to compare the performance of SBBR and SBR in treating p-chlorophenol (PCP). The sequencing batch reactor (SBR) and sequencing batch biofilm reactor (SBBR) systems were operated in five sequential periods: FILL, REACT (aerobic & anoxic), SETTLE, DRAW and IDLE in the time ratio of 2:12:1:1:8 for a cycle time of 24 h. The SBR was used as the control reactor (RC) while the other two SBBRs, RB1 and RB2, were operated with 3 % (v/v) and 5 % (v/v) of polyurethane sponge cubes as the carrier materials, respectively. Sludge age was maintained at 40 days throughout the study. The performance of the reactors was evaluated before and after th e addition of PCP by monitoring the effluent quality and the settling characteristics of the sludge. Profile studies for PCP, COD, nitrogen species, chloride, DO concentrations and pH during the REACT period were also conducted. The results show that complete ammonia nitrogen (AN) removal was achieved in all the reactors before the addition of PCP. After the addition of 100 mg/L PCP, reactors RB1 and RB2 still managed to achieve an almost 100 % AN removal but the removal efficiency for reactor RC deteriorat ed to 81 %. When the PCP concentration was increased up to 300 mg/L, the average AN removal efficiency for reactors RC, RB1 and RB2 decreased to 37, 67 and 45 %, respectively. Complete PCP mineralization was attained in all the reactors with the rate of PCP removal in the SBBRs being faster than that in the SBR. 95 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia ENV-O17 CHARACTERIZATION AND UTILIZATION OF MARINE ALGAE Eucheuma cottonii AND ITS CARRAGEENAN AS CADMIUM METAL ION BIOSORPTION 1 Refilda Suhaili, Edison Munaf, Rahmiana Zein, Abdi Dharma, Lim Lee Wah, Toyohide Takeuchi 3 and Fusheng Li 1 2 1 1 1 2 2 , Dept of Chemistry, Faculty of Mathematics and Natural Sciences Andalas University, Indonesia Dept of Chemistry, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan 3 River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan E-mail: refilda_59@yahoo.com E. cottonii was used as carrageenan resource. About 64.30 % carrageenan was successfully extracted from E. cottonii; (425 µm particle size) by alkaline solution under optimum condition, solution (pH 8.5), heating temperature at 95 °C for 18 h. FTIR was used to saw the functional group of extracted carrageenan and pure carrageenan. Inorganic cations and anions i...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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