Effect of increasing organic loading rate on the performance of conventional and modified sequencing batch reactors. (Dept. C)

Hossam Eldin Abdelaziz,Mohamed Abd El Hakim,Muharram Allaa El Din

doi:10.21608/bfemu.2020.118639

Hossam Eldin Abdelaziz, Mohamed Abd El Hakim + Show 1 more

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https://doi.org/10.21608/bfemu.2020.118639

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Journal: MEJ. Mansoura Engineering Journal	Publication Date: Oct 14, 2020
Citations: 1	License type: cc-by

Abstract

A modified sequencing batch reactor (MSBR) was developed by installing six fiber vertical plates of specific surface area of 180 cm2/ L in conventional sequencing batch reactor (SBR), which designed for supporting the biofilm formation and increasing the system efficiency. In this study, the effect of increasing the organic loading rate of 281.25 g COD/m3. d by 33%, 67%, and 100 % on the performance of SBR and MSBR was investigated. The effluent BOD5, COD and TSS of the MSBR at high organic loading rate was 20, 32 and 27 mg /L, respectively, while for conventional SBR was 34, 58 and 45 mg /L, respectively. The total bio-sludge of MSBR was more than that of conventional SBR by about 30% resulting in a reduction of the F/M value. The sludge volume index (SVI) in MSBR was lower than that of conventional SBR by about 33%. MSBR system was able to treat municipal wastewater with high performance.

Highlights

sequencing batch reactor (SBR) consists of a sequencing steps including filling, reaction, settling, decanting and idle [1]
A start-up period of about 1 month was followed by one week of testing period in SBR and modified sequencing batch reactor (MSBR) according to the organic loading rate applied to attain the steady state conditions which an effluent of Chemical oxygen demand (COD) and total suspended solids (TSS) was constant at a constant organic loading rate
The removal efficiencies of conventional SBR and MSBR was increased by decreasing the organic loading rate (OLR)

Summary

Introduction

SBR consists of a sequencing steps including filling, reaction, settling, decanting and idle [1]. SBR still suffer from some problems, such as excess sludge and a high SVI [2]. The sequencing batch biofilm reactor (SBBR) has an ability to combine the advantages of both biofilm reactor and SBR. Many researches have been performed by developing SBR to provide a high surface area for biofilm growth. SBBRs have already been used in the treatment of domestic wastewater [3 ˗ 6]. A high surface area of carriers can provide more sites for microorganisms to absorb and grow [7].

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