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This study aims to develop an anaerobic biofilter as a cost-effective wastewater treatment process for effluents from the food industry in developing countries. The anaerobic biofilter was developed using a combination of sand, biochar, and granite in a single unit. To determine the effect of operating the biofilter at a hydraulic loading rate (HLR) compared to the slow sand filtration (SSF) process, raw, untreated industrial water was fed into the anaerobic biofilter at varying volumetric flow rates of 0.14–1.41 l/h and at biochar bed heights of 21–26 cm. The results of the study revealed that at the middle bed height of 23.5 cm and the highest point of the volumetric flow rate (1.41 l/h) or HLR of 0.5 m/h, a removal rate of 91% COD, 93% BOD, 22% TSS, 9% pH, 97% oil and grease, and 30% phosphorus was achieved. Hence, the developed process can be operated at a higher HLR of 10 times the SSF process, which requires more space and characterized sand for efficient wastewater treatment.

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Design of an Anaerobic Biofilter Using Biochar from Agricultural Waste and Its Application for Safe Water Discharge from the Food Industry in Developing Countries

  • 会议论文

  • 发表日期：

    2025年

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  • Aramide Adenike Adesina,
  • Fadheelah Olanike Makanjuola,
  • Quadri Olatunji Salami,
  • Julius Gbenga Akinbomi

摘要

This study aims to develop an anaerobic biofilter as a cost-effective wastewater treatment process for effluents from the food industry in developing countries. The anaerobic biofilter was developed using a combination of sand, biochar, and granite in a single unit. To determine the effect of operating the biofilter at a hydraulic loading rate (HLR) compared to the slow sand filtration (SSF) process, raw, untreated industrial water was fed into the anaerobic biofilter at varying volumetric flow rates of 0.14–1.41 l/h and at biochar bed heights of 21–26 cm. The results of the study revealed that at the middle bed height of 23.5 cm and the highest point of the volumetric flow rate (1.41 l/h) or HLR of 0.5 m/h, a removal rate of 91% COD, 93% BOD, 22% TSS, 9% pH, 97% oil and grease, and 30% phosphorus was achieved. Hence, the developed process can be operated at a higher HLR of 10 times the SSF process, which requires more space and characterized sand for efficient wastewater treatment.