TREATABILITY EVALUATION OF MUNICIPAL WASTEWATER AND ANAEROBICALLY-TREATED INDUSTRIAL EFFLUENT IN A ROTATING BIOLOGICAL CONTACTOR

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TORKIAN A.; YAZDANI O.; ALINEJAD K.

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Paper Information

Journal: International Journal of Engineering Year:2003 | Volume:16 | Issue:2 (TRANSACTIONS B: APPLICATIONS) Page(s): 143-154

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Title

TREATABILITY EVALUATION OF MUNICIPAL WASTEWATER AND ANAEROBICALLY-TREATED INDUSTRIAL EFFLUENT IN A ROTATING BIOLOGICAL CONTACTOR

Author(s)

TORKIAN A. | YAZDANI O. | ALINEJAD K. | Issue Writer Certificate

Keywords

RBC

BIOFILM

FIXED-FILM TREATMENT

UASB

SLAUGHTERHOUSE

INDUSTRIAL WASTEWATER

Abstract

Performance of a rotating biological contactor (RBC) in treating municipal ‎wastewater from primary sedimentation basin and anaerobically treated industrial ‎effluent from an up flow anaerobic sludge blanket (UASB) reactor was investigated. ‎The 280-L six-stage RBC pilot was operated at different organic loading rates and ‎biodisc speeds. The overall removal efficiencies of soluble BOD decreased with ‎increasing organic loading rates. Disk rotational speed did not have significant effect ‎on performance in the range studied. The results showed that satisfactory treatment of ‎UASB effluent to meet regulatory requirement for agricultural purposes (effluent ‎BOD of 100 mg L^-1) can be achieved with sufficient margin margin of safety at ‎organic loading rate of up to 4.9±0.4g SBOD m^-2 d^-1 with SBOD removal ‎efficiency of 59±9%. For municipal wastewater, it was possible to achieve SBOD ‎effluent values of below 20 mgL^-1 all the time. Most of the organics were removed ‎in the first three stages with minimal contribution form the remaining stages of the ‎RBC reactor. There was a decrease in SBOD removal efficiency to 74±3% at OLR ‎value of 17.8±2.1g SBOD m^-2 d^-1 and 66±6% at OLR value of 4.7±1.9g SBOD ‎m^-2 d^-1 for UASB effluent and municipal wastewater, respectively. The results for ‎elimination capacity (EC) values indicated a linear relationship with first stage ‎organic loading rates without any signs of limitation in the range of OLR values ‎investigated in this study. However, average first-stage elimination capacity rates of ‎‎3.2 and 2 at OLR values of 17.8 and 11g SBOD m^-2 d^-1 for UASB effluent and 1.3 ‎and 2 at OLR values of 4.7 and 5.3g SBOD m^-2 d^-1 for municipal wastewater were ‎relatively lower than previous studies of RBC performance using domestic or ‎industrial wastewater without anaerobic pretreatment. It was suggested that the lower ‎EC values were due to the fact that a smaller fraction of UASB effluent was ‎biodegradable as reflected in SBOD/SCOD ratios of 0.47±0.04. For municipal ‎wastewater, even though SBOD/SCOD ratios were 0.49±0.03, the low EC values ‎were suggested to be contributed to lower influent concentration potential considering ‎first-order kinetics governing biochemical reactions‏.‏

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APA: Copy

TORKIAN, A., YAZDANI, O., & ALINEJAD, K.. (2003). TREATABILITY EVALUATION OF MUNICIPAL WASTEWATER AND ANAEROBICALLY-TREATED INDUSTRIAL EFFLUENT IN A ROTATING BIOLOGICAL CONTACTOR. INTERNATIONAL JOURNAL OF ENGINEERING, 16(2 (TRANSACTIONS B: APPLICATIONS)), 143-154. SID. https://sid.ir/paper/355275/en

Vancouver: Copy

TORKIAN A., YAZDANI O., ALINEJAD K.. TREATABILITY EVALUATION OF MUNICIPAL WASTEWATER AND ANAEROBICALLY-TREATED INDUSTRIAL EFFLUENT IN A ROTATING BIOLOGICAL CONTACTOR. INTERNATIONAL JOURNAL OF ENGINEERING[Internet]. 2003;16(2 (TRANSACTIONS B: APPLICATIONS)):143-154. Available from: https://sid.ir/paper/355275/en

IEEE: Copy

A. TORKIAN, O. YAZDANI, and K. ALINEJAD, “TREATABILITY EVALUATION OF MUNICIPAL WASTEWATER AND ANAEROBICALLY-TREATED INDUSTRIAL EFFLUENT IN A ROTATING BIOLOGICAL CONTACTOR,” INTERNATIONAL JOURNAL OF ENGINEERING, vol. 16, no. 2 (TRANSACTIONS B: APPLICATIONS), pp. 143–154, 2003, [Online]. Available: https://sid.ir/paper/355275/en

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