ANAEROBIC DIGESTION

"Anaerobic Digestion" is a series of processes in which microorganisms break down biodegradable material in the absence of oxygen. AD is widely used to treat wastewater and organic wastes because it provides volume and mass reduction of supplied materials.

While it takes approx. 200 million years to "create" natural gas, it is done in a couple of weeks to produce biogas. Biogas can be used as a common natural gas for heating and energy production. Agricultural and food industry waste products can be used to provide energy from waste. The natural gas that is pumped up from underground reservoirs have the same origin as biogas - both are formed from organic materials.

The following raw materials can be used for biogas production: cattle manure, pig manure, chicken dung, slaughterhouse waste (blood, fat, entrails, and rumen content), plants waste, silage, rotten grain, waste water, fats, bio-waste, food industry waste, malt remnants, marc, distillery slop, bioethanol plant slop, brewer’s grain (crushed malt remnants after wort filtration), sugar beet and fruit pulp, sugar beet tops, technical glycerin (after biodisel production), fiber and other starch and treacle production, milk whey, flotation sludge, dewatered flotation sludge from municipal waste water treatment plants, algae. Most of the raw materials can be mixed with each other.

Application Areas

Biogas technology is a very good solution to local energy needs. It gives an opportunity for the decentralization of energy production.

Energy can be produced and used at point of production.

Systems like these reduce cost of energy transfer, a big consideration where energy needs are small, and helps in places where there are no mature energy grids.

Commercial farms and plantations: Biogas technology addresses holistically various agricultural problems such as expensive fertilizers and feeds, primitive technology use, produce spoilage, poor waste disposal, soil erosion, ecological degradation and importantly farm power.

With the use of agricultural wastes through biogas technology, wastes from farms can be used for generating energy for brooding chicks, gas incubators, boiler operations. Provision of fuel for stationary engines, to supply motive, pump water, drive machinery (e.g. threshers, grinders) or generate electricity.

Biogas is used as supplementary fuel in dual fuel engines. Drying, cooking, boiling and smoking of fish (especially catfish), taking into consideration the market value of smoked fish. Fertilizer production rich in NPK as microorganisms in the bioreactor fix nitrogen, which would have been lost to volatization through the normal practice of spreading raw wastes or burning. The fertilizer also helps in soil aggregation without accumulations of salts as characterized by raw organic wastes apppilication.that are toxic to plants.

Fertilizer is weed seed free, pathogenic microorganism reduced drastically and odorless. Improving crop productivity and farm hygiene. It is usual for livestock farmers to have fishponds, the mineralized water serve as nutrients for the growth of planktons (Natural fish food) when used in fishpond fertilization, without harming fish population and affecting dissolved oxygen.