4.5 Article

Treatment of Poultry Slaughterhouse Wastewater (PSW) Using a Pretreatment Stage, an Expanded Granular Sludge Bed Reactor (EGSB), and a Membrane Bioreactor (MBR)

期刊

MEMBRANES
卷 11, 期 5, 页码 -

出版社

MDPI
DOI: 10.3390/membranes11050345

关键词

chemical oxygen demand (COD); expanded granular sludge bed reactor (EGSB); fats; oil; and grease (FOG); membrane bioreactor (MBR); poultry slaughterhouse wastewater (PSW); total suspended solids (TSS)

资金

  1. National Research Foundation, Thuthuka Funding [R017]
  2. Cape Peninsula University of Technology University Research Fund (URF)
  3. Bioresource Engineering Research Group (CPUT, BioERG) subsidy cost centers [RK45, R971]

向作者/读者索取更多资源

This study successfully treated poultry slaughterhouse wastewater (PSW) by combining a biological pretreatment stage, an expanded granular sludge bed reactor (EGSB), and a membrane bioreactor (MBR). The system achieved contaminant removal rates exceeding 97%, meeting the discharge standards set by the City of Cape Town (CoCT). The EGSB and MBR played key roles in reducing concentrations of total suspended solids (TSS), chemical oxygen demand (COD), and fats, oil, and grease (FOG) to acceptable levels, demonstrating an effective and low-cost method for treating medium- to high-strength wastewater.
This study presents the biological treatment of poultry slaughterhouse wastewater (PSW) using a combination of a biological pretreatment stage, an expanded granular sludge bed reactor (EGSB), and a membrane bioreactor (MBR) to treat PSW. This PSW treatment was geared toward reducing the concentration of contaminants present in the PSW to meet the City of Cape Town (CoCT) discharge standards and evaluate an alternative means of treating medium- to high-strength wastewater at low cost. The EGSB used in this study was operated under mesophilic conditions and at an organic loading rate (OLR) of 69 to 456 mg COD/L center dot h. The pretreatment stage of this laboratory-scale (lab-scale) plant played an important role in the pretreatment of the PSW, with removal percentages varying between 20% and 50% for total suspended solids (TSS), 20% and 70% for chemical oxygen demand (COD), and 50% and 83% for fats, oil, and grease (FOG). The EGSB further reduced the concentration of these contaminants to between 25% and 90% for TSS, 20% and 80% for COD, and 20% and >95% for FOG. The last stage of this process, i.e., the membrane bioreactor (MBR), contributed to a further decrease in the concentration of these contaminants with a peak removal performance of >95% for TSS and COD and 80% for the FOG. Overall, the system (pretreatment-EGSB-MBR) exceeded 97% for TSS and COD removal and 97.5% for FOG removal. These results culminated in a product (treated wastewater) meeting the discharge standards.

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