Decomposition of organic wastes and fecal sludge by Black Soldier Fly larvae | |
| Author | Nguyen Hong Dang |
| Call Number | AIT Thesis no.EV-10-08 |
| Subject(s) | Organic wastes as feed--Thailand--Pathum Thani Flies |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environment Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | Organic wastes management is a major problem in developing countries which requires an innovative intervention. Reducing amount organic waste as well as recovery waste source by using Black soldier fly (BSF) larvae appears as a promising alternative practice. This research was conducted in AIT campus, Bangkok, Thailand in order to explore the treatability of BSF larvae in degradation of different organic wastes. The efficiency of This method was based on total waste reduction and total prepupal biomass output. Futhermore, this research was to identify the digestibility of BSF larvae in fecal sludge (FS) by mixing municipal waste with FS and determining the most appropriate FS feeding rate for BSF larvae The experimental results showed that kitchen waste was the most appropriate feed because of a prepupal dry weight output (59.9 ±3.4 mg) and high organic matter degradation (59.4 ± 0.48 %) within a time 18 days of degradation. At the FS and food waste feed, ratio of 50:50 could obtain the highest waste reduction (66.6 ± 0.8 %). Besides, one experiment was done to identify the appropriate fecal sludge feeding rate for BSF larvae. The results indicated that 50 mg/larva/day was the most suitable FS feeding rate due to high percentage of waste reduction (59.2 ± 5.8 %) and high prepupal biomass (39.7 ± 13.6 mg). An example to demonstrate the organic wastes treatability by BSF: a city with population 2000 people with the generation rates of 2 kg food wastes and 0.7 kg FS per person/day. Amount of organic wastes in this city could be estimated at 4000 kg food wastes and 1400 kg FS per day. With BSF composting method, amount of food wastes can be reduced per day was 2376 kg (equal to 59.4%) within 18 days and fecal sludge amount was reduced by 828.8 kg/day (equal to 59.2%) within 28 days. Besides, prepupal biomass output could be gotten were 236.4 kg (5.91% total food wastes) and 52.08 kg (3.72% total fecal sludge). If the BSF prepupae were marketed as speciality feeds, they contained high nutrient value. The chitin corrected crude protein content ranged from 39.53 –59.16% with different types of waste sources were researched in this study. It could be concluded that BSF larvae not only degrade large amount of organic wastes that reduce the impact of organic waste in environment, but also convert to rich protein content prepupal biomass for animal feeding. |
| Year | 2010 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Thammarat Koottatep; |
| Examination Committee(s) | Visvanathan, C.;Yakupitiyage, Amararatne;Morel, Antoine; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2010 |