Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae

Wastewater treatment plant (WWTP) produces sludge deposits needing further treatment and handling to prevent pollution. Food and beverage industry sludge, rich in organic matter and nutrients, serves as a biomass source. Black Soldier Fly Larvae (BSFL) have degraded various organic materials, transf...

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Main Authors: Ursada Riang, Bagastyo Arseto Yekti, Purnomo Alfan
Format: Article
Language:English
Published: EDP Sciences 2025-01-01
Series:BIO Web of Conferences
Online Access:https://www.bio-conferences.org/articles/bioconf/pdf/2025/08/bioconf_srcm24_05011.pdf
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author Ursada Riang
Bagastyo Arseto Yekti
Purnomo Alfan
author_facet Ursada Riang
Bagastyo Arseto Yekti
Purnomo Alfan
author_sort Ursada Riang
collection DOAJ
description Wastewater treatment plant (WWTP) produces sludge deposits needing further treatment and handling to prevent pollution. Food and beverage industry sludge, rich in organic matter and nutrients, serves as a biomass source. Black Soldier Fly Larvae (BSFL) have degraded various organic materials, transforming nutritious organic waste into high-quality protein biomass. BSFL potentially converts sludge when mixed with other nutrient sources like food waste. This study analyzes the effect of feeding rate and composition on BSFL bioconversion of milk and creamer industrial sludge. The sludge was collected from the creamer processing industry after screw and filter pressing, and the milk processing industry after belt pressing. The substrates contained sludge, mixed fruit-vegetable wastes, and protein wastes (i.e., shrimps and fish wastes), with various ratio of 60:20:20, 60:10:30, 40:30:30, 40:20:40, 40:10:50, 50:25:25, 50:20:30, 50:10:40, and 70:15:15 (in dry weight percentage). Moisture content was kept at 65-85% and pH at 6.5-7. Feeding rates of 10, 20, and 30 mg dry matter/larva/day were assessed. Creamer processing industrial sludge, particularly from filter press is preferable for larval growth than the milk industry. The highest larva weight was obtained from substrates containing mixed fruit-vegetable wastes:fish wastes ratio of 1:1, with the addition of creamer and milk sludge of 50%, i.e., 0.250 gram WM/larva after 17 days of growth. In addition, with the recommended feeding rate is 10-20 mg dry matter/larva/day, the sludges can be bio-converted using BSFL by combining it with food wastes at around 40-60%. This offers alternatives for the treatment and handling of industrial waste sludges.
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spelling doaj-art-87d9ccd6a770477d8276f462897572ea2025-02-07T08:20:29ZengEDP SciencesBIO Web of Conferences2117-44582025-01-011570501110.1051/bioconf/202515705011bioconf_srcm24_05011Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvaeUrsada Riang0Bagastyo Arseto Yekti1Purnomo Alfan2Master Study Program, Department of Environmental Engineering, Faculty of Civil Engineering and Planning, Institut Teknologi Sepuluh NopemberDepartment of Environmental Engineering, Faculty of Civil Engineering and Planning, Institut Teknologi Sepuluh NopemberDepartment of Environmental Engineering, Faculty of Civil Engineering and Planning, Institut Teknologi Sepuluh NopemberWastewater treatment plant (WWTP) produces sludge deposits needing further treatment and handling to prevent pollution. Food and beverage industry sludge, rich in organic matter and nutrients, serves as a biomass source. Black Soldier Fly Larvae (BSFL) have degraded various organic materials, transforming nutritious organic waste into high-quality protein biomass. BSFL potentially converts sludge when mixed with other nutrient sources like food waste. This study analyzes the effect of feeding rate and composition on BSFL bioconversion of milk and creamer industrial sludge. The sludge was collected from the creamer processing industry after screw and filter pressing, and the milk processing industry after belt pressing. The substrates contained sludge, mixed fruit-vegetable wastes, and protein wastes (i.e., shrimps and fish wastes), with various ratio of 60:20:20, 60:10:30, 40:30:30, 40:20:40, 40:10:50, 50:25:25, 50:20:30, 50:10:40, and 70:15:15 (in dry weight percentage). Moisture content was kept at 65-85% and pH at 6.5-7. Feeding rates of 10, 20, and 30 mg dry matter/larva/day were assessed. Creamer processing industrial sludge, particularly from filter press is preferable for larval growth than the milk industry. The highest larva weight was obtained from substrates containing mixed fruit-vegetable wastes:fish wastes ratio of 1:1, with the addition of creamer and milk sludge of 50%, i.e., 0.250 gram WM/larva after 17 days of growth. In addition, with the recommended feeding rate is 10-20 mg dry matter/larva/day, the sludges can be bio-converted using BSFL by combining it with food wastes at around 40-60%. This offers alternatives for the treatment and handling of industrial waste sludges.https://www.bio-conferences.org/articles/bioconf/pdf/2025/08/bioconf_srcm24_05011.pdf
spellingShingle Ursada Riang
Bagastyo Arseto Yekti
Purnomo Alfan
Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
BIO Web of Conferences
title Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
title_full Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
title_fullStr Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
title_full_unstemmed Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
title_short Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
title_sort effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae
url https://www.bio-conferences.org/articles/bioconf/pdf/2025/08/bioconf_srcm24_05011.pdf
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AT purnomoalfan effectoffeedingrateandcompositionforbioconversionofwastewatertreatmentplantsludgefromthemilkandcreamerprocessingindustriesusingblacksoldierflylarvae