Proven technology - unique design Within the AS-C Enviro Control plant, the temperature is usually maintained at 55 degrees Celsius - the optimum for efficient digestion. A delivery system ensures a constant feed of uniform waste, whilst the reactor size, waste throughput and operational parameters are custom designed for each installation . A well-proven microbial biomass retention process increases digester efficiency by constantly maintaining the correct population of microbes within the digester. Minimal consumption - maximum production A small amount of compressed biogas, regularly introduced into the process tank, keeps the biomass in suspension. This maintains a gentle mixing action and achieves greater contact of the waste with the digesting microbes. Biogas produced powers a specially designed internal combustion engine, generating electricity. It can also be used for heat production in a steam-generating boiler, or to power a refrigeration system. By-product heat can be captured to benefit other processes on the operator's site.

Clean resudie The digester residue can, if necessary, be passed through the solids recovery system and pumped back into the digester for enhanced biomass activity. The liquid is pumped into a discharge sump for subsequent treatment, storage, or release. Residual anaerobic bacteria may be destroyed if required, by introducing air into the residue. The plant discharge can, therefore, be pumped directly into receiving waters or municipal sewage systems. (Aerobic post treatment for exceptionally concentrated wastes can also be incorporated). Authority The technology used in AS-C Enviro Control plants has been developed by Dr David Stafford, an acknowledged and published world authority in wastewater treatment and biological recycling. Dr Stafford has over 25 years' research experience. A member of the Society of Applied Microbiology and visiting Professor in Applied Microbiology at West Virginia State College, USA.