We conclude our AD trials this month by using a standard LPG low pressure regulator instead of the refrigerant gas manifold as is being used by gas users for cooking. We did this by compressing biogas into a disused LPG tank. We were able to do this by sourcing a fillable gas valve that allowed…
We are now adding value to the digestate by converting it into an effective and safe liquid fertiliser that can be used for plants and food crops. The brown digestate undergoes primary sedimentation, a process whereby the large particles settle out of solution by gravity. This removes the characteristics smell of the product leaving a…
We may be the first to produce compressed biogas in Seychelles! On Saturday 15th February 2025 we continued where we left off by firstly brazing connectors to the fridge compressor and wiring it for use. Tests were conducted on the compressor and found to be in good condition. On the Monday flexible pressure hose was…
In January 2025, we were also looking at ways of compressing biogas so that it can be separated from the reactor and used elsewhere. How about for barbeque on the beach? Perhaps at a sports or other recreational event? We considered two storage options 1) an inner tube that will be expanded under pressure and…
On 22nd January 2025, our chemicals expert- Mr. Cliff Gonzalves-led a training workshop on inventory for chemicals listed under the Stockholm Convention on Persistent Organic Pollutants. The knowledge will help participants in their work being the Technical Working Groups (TWG) for the national inventory on Persistent Organic Pollutants (POPs). This activity is part of the…
We modified our medium plant yesterday 13.01.2025 and increased the dimension of gas tubes to half inch (using water garden hose). The idea is that bigger tubes will give more volume of biogas which will lead to better heating on the stove. We also tested the impact of distance from the digester to the stove…
As part of the TWENEx project, we analysed and compared biogas potential of two different biowaste stream currently being sent to landfill, namely fish sludge from the Indian Ocean Tuna Ltd Company and sewage sludge from the treatment of wastewater from the Public Utilities Corporation (PUC). Experimental setup Three bottles were setup containing 70g of…
On 17th December 2024, we participated in a training on waste characterization with lecturers from the University of Mauritius’ Department of Chemical and Environment Engineering. In his brief opening remark, the CEO of LWMA Mr. Shane Emilie stressed the importance of the training as the Agency gears itself to improve solid waste management in Seychelles.…
In the month of November 2024, we successfully built and tested a 500 litres biodigester which was placed in a remote location for testing. This test was to check gas generation rate compared to small scale, performance of the modified cooker and see the effectiveness of biogas as heating source for cooking. The demo plant…
Our lead national expert participated in the three day regional training on NIP update held at the Stockholm Regional Center in Kenya hosted in the International Centre of Insect Physiology and Ecology (ICIPE). The training covered recently listed POPs namely Dechlorane Plus and UV-328 major uses and exemptions. On Day 1, session 1 NIP Development,…
