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<p>In Bangladesh, urbanization and population growth have led to an increase in organic waste, including faecal sludge (FS), challenging traditional disposal methods like landfilling and incineration. Organizations such as WaterAid Bangladesh and the Bangladesh Association for Social Advancement have supported the development of sludge treatment plants, such as the one in Sakhipur Municipality since 2016. This facility effectively manages FS and organic waste, producing high-quality compost sold to local farmers. Vermicomposting of FS offers an eco-friendly solution that addresses sanitation issues, benefits agriculture, and reduces environmental impact by diverting sludge from landfills. The main goal of this research is to explore the effectiveness of vermicomposting as a sustainable method for managing faecal sludge, while also producing a beneficial soil amendment. 900&#xa0;g of cow dung was mixed with faecal sludge at a ratio of 1:3 in this study to produce vermicompost. The resulting compost, characterized by a dry, dark gray appearance and no unpleasant odors, exhibited favorable moisture levels and color. Physiochemical tests indicated mature compost with a pH of 8.1, 12.29% Total Organic Carbon (TOC), and 1.12% Total Organic Nitrogen (TON), suitable for soil improvement with a Carbon to Nitrogen (C/N) ratio of 10.97:1, well below the 20:1 limit set by Bangladesh’s Ministry of Agriculture. Verified by the Soil Resource Development Institute in Dhaka, levels of heavy metals like lead and nickel, as well as other components such as phosphorus and sulfur, met standard regulatory limits, though potassium levels were lower than required. The analysis of dried faecal sludge components indicates that all component values decreased following its use as a compost substrate. It also emphasizes that advancing vermicomposting methods could improve sanitation, public health, and global environmental sustainability.</p>

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Feces to fertilizer: an innovative vermicomposting method for environmentally sustainable faecal sludge management

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • Asma Ul Hosna,
  • Md. Ashiquzzaman Pavel,
  • Saima Alam Trisha,
  • Md. Monirul Islam

摘要

In Bangladesh, urbanization and population growth have led to an increase in organic waste, including faecal sludge (FS), challenging traditional disposal methods like landfilling and incineration. Organizations such as WaterAid Bangladesh and the Bangladesh Association for Social Advancement have supported the development of sludge treatment plants, such as the one in Sakhipur Municipality since 2016. This facility effectively manages FS and organic waste, producing high-quality compost sold to local farmers. Vermicomposting of FS offers an eco-friendly solution that addresses sanitation issues, benefits agriculture, and reduces environmental impact by diverting sludge from landfills. The main goal of this research is to explore the effectiveness of vermicomposting as a sustainable method for managing faecal sludge, while also producing a beneficial soil amendment. 900 g of cow dung was mixed with faecal sludge at a ratio of 1:3 in this study to produce vermicompost. The resulting compost, characterized by a dry, dark gray appearance and no unpleasant odors, exhibited favorable moisture levels and color. Physiochemical tests indicated mature compost with a pH of 8.1, 12.29% Total Organic Carbon (TOC), and 1.12% Total Organic Nitrogen (TON), suitable for soil improvement with a Carbon to Nitrogen (C/N) ratio of 10.97:1, well below the 20:1 limit set by Bangladesh’s Ministry of Agriculture. Verified by the Soil Resource Development Institute in Dhaka, levels of heavy metals like lead and nickel, as well as other components such as phosphorus and sulfur, met standard regulatory limits, though potassium levels were lower than required. The analysis of dried faecal sludge components indicates that all component values decreased following its use as a compost substrate. It also emphasizes that advancing vermicomposting methods could improve sanitation, public health, and global environmental sustainability.