The effluent is starchy, what sterilization method could be applied? In addition, how can we ensure substrate quality for quality control? Can we enrich the effluent with essential nutrients?
The technology of producing ethanol from starch is internationally well developed. Waste stream of cassava - ethanol can be used for biogas production. For detail information consult https://www.probos.nl and https://www.jstor.org and https://www.academicjournals.org
You can consider an anaerobic fermentation with the capture of natural methane gas which can be used burning for cooking drying processing or for electrical generation. Ideally the system when cleaned out will be composted with the compost being used for food crop production.
In terms of fortifying the fermentation the cassava substrate would be mixed with cow dung and urine. The cow dung would serve as inoculant and the clean out will be excellent for aerobic compost when supplemented with straw or woody material. The compost will eliminate the need of imported fertilizer and allow the buffering and improvement of tropical acid soil situations.
These are great insights... I appreciate.
Biogas, bioethanol or any other valuable suggestions will also be appreciated.
What's the fate of the effluent after its release from the factory?
coarse straw or woody material is used as a based layer. The fluids will be sopped up by this material cover will another layer of straw woody material than put the solids and cover wit another woody straw layer. The dimensions should be more than a cubic meter to insulate and increase to compost temperatures. Compost is made as lasagna. Temperature can be used to monitor the compost process.