MBSA Biogas Plant

Market Suggested Retail Price

$200.00

Distributors / Implementing Organizations

This product is implemented by MBSA in partnership with FACT Foundation.

Manufacturing/Building Method

This product is manufactured by MBSA for use at one of their Oil Extraction Sites (OSE), and at least five of these sites have been manufactured ^pp23 in Mali and Burkina Faso. Manufacturing method is currently on a per demand basis from fiber-reinforced PVC, and the connecting pipes are also made from PVC.

Intellectural Property Type

Trademarked

User Provision Model

MBSA supplies 3 regions of Mali and 2 regions in Burkina Faso with industrial scale machinery to service up to 12,000 farmers per region ^pp26. The MSBA Biogas Plants can be used in conjunction with these sites.

Distributions to Date Status

As of 2012, five Oil Extraction Sites (OES) and five Multifunctional Platforms (MFP) have been distributed.

Design Specifications

The MBSA Biogas plant is a plug flow type digester made of a fibre re-enforced PVC bag of 10 m³ for anaerobic digestion. Inlet and outet connections are made through 110 mm PVC pipes, and the air input is achieved through an aquarium pump that injects air into the bag through a small plastic hose. A plastic valve is also in place to control the air flow in the system, and a 20W photovoltaic system supplies electricity for the pump. Additional components like a condensation trap, a flow meter, a pressure release system with pressure meter, and 3 valves (gas network control), are required. ^{Thesis by Kevin Chapon} The system has a length of 7.0 m and a width of 2.6 m.

Technical Support

Training needs and support provided by MBSA staff.

Replacement Components

Replacement components can be sourced through MBSA foundation and manufacturing plants. MBSA understands and focuses on the need for simple replacements using in-country supplies. ^{Thesis by Kevin Chapon}

Lifecycle

Unknown

Manufacturer Specified Performance Parameters

The manufacturer specified targets are to add value to the farming of Jatropha, increasing crop yield rates by 20% in five years, and to add an additional income of ~1 USD per day to farmers. As part of this process, the SOXHLET is designed to press 3,000 kg of Jatropha seeds per hour ^pp24, yielding 0.29 kg of oil per 1 kg of seeds ^pp260.

Vetted Performance Status

Testing of biogas input, performance and effectiveness of liquid/solid separation for use as a fertilizer was conducted in 2011 by Kevin Chapon from AVANS Hogeschool working with MBSA and FACT. These are some of the findings: • The hydraulic retention time of the system is set at 50 days, so the daily input of feedstock is 1/50 of the digester volume. • Wet mixture represents 6 m³, so the daily input should be 120 liters. • The supply of the digester started with 35 kg of cattle dung associated to 55 liters of water during the first month. The amount of manure was decreased by 5 kg every two weeks while adding Jatropha press cake to the mixture. After two and a half months, the digester was supplied by 15 kg of manure and 8 kg of Jatropha press cake. • The average daily biogas production is 2.71 m³/day.

Safety

One of the by-products of the digester is hydrogen sulphide, a colorless, very poisonous, flammable gas with the characteristic foul odor of rotten eggs at a concentration up to 100 ppm. ^{Thesis by Kevin Chapon}

Complementary Technical Systems

Complimentary technical systems include a 20 W solar powered air pump.

Academic Research and References

Compliance with regulations

None specified by MBSA. FACT Foundation's mandate is to develop biofuels in accordance with European quality standards. ^{Thesis by Kevin Chapon}

Other Information

Performance can be improved through better anaerobic digestion process, general system efficiencies improvements, incorporation of techniques and technologies to allow for various biofuel inputs, increasing biogas conversion rate, reducing water input and/or recovering some of the water through system recycling and re-use. Improving ways to recover and utilize biogas by-products (effluent) as a fertilizer can also lower operation costs, reduce payback period, and increase a farmer's income. As some power is also required for operation, connecting to a complementary and readily available source of power like solar PV can be very useful. ^{Thesis by Kevin Chapon}