Investigating the Use of Rice Husk Ash to Improve the Dewatering Performance in the Sludge Drying Beds at Lubigi
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Date
2024-04-15
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Abstract
Sludge from onsite sanitation systems is called feces, and it is not dumped into a sewer. One of the management issues in Sub-Saharan Africa's heavily crowded urban slums is Faecal sludge. The high cost of emptying, the high density of dwelling units, and the long haulage routes to the treatment plants make it expensive to collect and transport Faecal sludge from slums to treatment facilities. The slum dwellers have adopted the use of additives that are marketed under the premise of being able to reduce volume of Faecal Sludge, odor emanating from it and the flies. As per the analysis, Faecal Sludge contains over 90 % water, dewatering it presents an important step for resource recovery (Shukla, A review on generation, characterization, containment, transport and treatment of fecal sludge and septage with resource recovery-oriented sanitation, 2023). This study aimed at investigating the use of rice husks ash to improve the dewatering performance in the sludge drying beds. The Lubigi Faecal sludge and Treatment Plant was considered as our area of study. The ability of the drying beds to dewater the faecal sludge was assessed by the determination of the Moisture Content and Total Solids of the faecal sludge and these were measured in terms of percentages.