EFFECT OF OXIC-SETTLING ANOXIC PROCESS ON OPERATION PARAMETERS AND BIOLOGICAL EXCESS SLUDGE REDUCTION IN SEQUENCING BATCH REACTOR ACTIVATED SLUDGE

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TAKDASTAN AFSHIN; KARIMI FERDOS; OROOJI NAGHMEH

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Journal: Journal of Mazandaran University of Medical Sciences Year:2018 | Volume:28 | Issue:162 Page(s): 128-140

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Title

EFFECT OF OXIC-SETTLING ANOXIC PROCESS ON OPERATION PARAMETERS AND BIOLOGICAL EXCESS SLUDGE REDUCTION IN SEQUENCING BATCH REACTOR ACTIVATED SLUDGE

Author(s)

TAKDASTAN AFSHIN | KARIMI FERDOS | OROOJI NAGHMEH | Issue Writer Certificate

Keywords

SBR REACTORQ1

BIOLOGICAL EXCESS SLUDGEQ1

YIELD COEFFICIENTQ1

HOLDING TANKQ1

ORPQ1

Abstract

Background and purpose: One of the solutions for sludge production is to reduce that viadecreasing the YIELD COEFFICIENT by oxic-settling anoxic process with different oxidation reductionpotential (ORP) in sequencing batch reactor (SBR) activated sludge. Materials and methods: We used 2 SBR REACTORs (20 L volume) that were controlled online. At a steady state in reactors, some parameters such as COD, DO, SVI, ORO, dry solids and moisture ofsludge were tested during 12 months. Finally, YIELD COEFFICIENT and reduction rate of biological excesssludge were studied. Results: At 10-day sludge age, the best removal efficiency of COD (95%) was seen without anysludge bulking problems and the kinetic coefficient Y and Kd were 0. 58        g CODg Biomassand 0. 058   d1, respectively. The anoxic and anaerobic phase of the sludge HOLDING TANK showed that sludge storage after7 hours in the reactor with ORP=-238 decreased the YIELD COEFFICIENT from 0. 58 in the control reactor to0. 25g of biomass in g of COD. Consequently, the excess sludge decreased by almost 60%. On the otherhand, compared to the control reactor (92 ml/g), the SVI reduced to less than 40 ml/g. Conclusion: Using HOLDING TANKs in aerobic conditions with ORP greater than 230mv couldcause appropriate settling and lead to a high efficiency of COD removal from wastewater.

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APA: Copy

TAKDASTAN, AFSHIN, KARIMI, FERDOS, & OROOJI, NAGHMEH. (2018). EFFECT OF OXIC-SETTLING ANOXIC PROCESS ON OPERATION PARAMETERS AND BIOLOGICAL EXCESS SLUDGE REDUCTION IN SEQUENCING BATCH REACTOR ACTIVATED SLUDGE. JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES, 28(162 ), 128-140. SID. https://sid.ir/paper/45055/en

Vancouver: Copy

TAKDASTAN AFSHIN, KARIMI FERDOS, OROOJI NAGHMEH. EFFECT OF OXIC-SETTLING ANOXIC PROCESS ON OPERATION PARAMETERS AND BIOLOGICAL EXCESS SLUDGE REDUCTION IN SEQUENCING BATCH REACTOR ACTIVATED SLUDGE. JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2018;28(162 ):128-140. Available from: https://sid.ir/paper/45055/en

IEEE: Copy

AFSHIN TAKDASTAN, FERDOS KARIMI, and NAGHMEH OROOJI, “EFFECT OF OXIC-SETTLING ANOXIC PROCESS ON OPERATION PARAMETERS AND BIOLOGICAL EXCESS SLUDGE REDUCTION IN SEQUENCING BATCH REACTOR ACTIVATED SLUDGE,” JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES, vol. 28, no. 162 , pp. 128–140, 2018, [Online]. Available: https://sid.ir/paper/45055/en

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