Gas to Energy
Landfill Methane Gas to Energy Project As solid waste in landfills decomposes, landfill gas is released. Landfill gas consists of approximately 50% methane, 42% carbon dioxide, 7% nitrogen and 1% oxygen compounds. Landfill gas is a readily available, local and renewable energy source that offsets the need for non-renewable resources such as oil, coal and gas. Dolphin Coast Landfill Management recognises that today’s landfill sites are not just waste burial sites but reactors where gases produced by decomposing waste can be used for energy production. Methane is produced and emitted by landfills. Landfill gas is approximately 50% methane gas. Methane is basically ‘natural gas’ and can therefore be captured and used as a source of energy.
Clean Development Mechanism
In order to be eligible under the CDM, projects have to follow rules and meet requirements set by the Kyoto Protocol. The project must reduce one or several of the six greenhouse gases covered by the Protocol. They include:
- Carbon dioxide (CO2), emitted e.g. by fossil fuel power generation
- Methane (CH4)
- Nitrous oxide (N2O)
- Several fluorinated industrial gases
- Sulphur hexafluoride (SF6)
- Hydrofluorocarbons (HFCs)
- Perfluorocarbons (PFCs)
DCLM captures landfill methane gas and uses it as an energy source. Gas-to-energy process offers a cost effective and environmental solution to tackling greenhouse gas emissions. DCLM will be taking energy production to a new level in South Africa.
Solar to Energy
Solar energy from landfill
Solar energy technology will allow Dolphin Coast Landfill Management to increase the overall energy output of its site. The innovative solar landfill cover will consist of an integrated geomembrane flexible solar laminates system. The cover will be applied to capped Cells to produce renewable energy resulting in a solution that is flexible, aesthetically pleasing, efficient, economical and providing long term environmental benefits. The electricity produced will be supplied to local and surrounding communities and businesses. A geomembrane exposed landfill cover is flexible solar laminates which capture the sun’s rays for conversion into clean renewable electricity. They are adhered directly to the synthetic geomembrane used to cover closed landfill cells as they reach capacity. Unlike traditional rigid solar panels, which are bulky and frequently cost-prohibitive to install, this system uses flexible, non-reflective collection strips. The flexible solar strips can be configured to maximize the hours of sunlight exposure throughout the year, depending upon a landfill’s design and site contours. DCLM will cover closed landfill cells with the solar collection strips adhered directly on the geomembrane cap. The solar energy geomembrane cover is easier to inspect, maintain, and repair than a traditional clay cap, and is technically superior in terms of odor control and stormwater management. A first in South Africa and a proud initiative by DCLM.
Dolphin Coast Landfill Management have comissioned the VSEP unit at the Kwadukuza Landfill. DCLM have acquired the rights to be the representative of the VSEP unit in Southern Africa.
Introduction to VSEP
Due to the demands of chemical processing manufactures facing global competition, the search for new manufacturing technologies that can improve product performance, reduce operating costs and prevent pollution problems before they occur, are in very high demand.
The VSEP (Vibratory Shear Enhanced Processing) methodology is a solution and has been implemented in various different industrial applications all over the world. Through the innovations of the VSEP methodology in membrane chemistry and design, evolution in the Industrial environment is imminent.
Zero Liquids to Landfill
With the promulgation of the New Waste Regulations, and the clause of Zero liquids to landfill in six years, the need for a suitable treatment facility is extremely critical. The VSEP will enable industries to comply with the new regulation of ‘Zero liquids to Landfill’ and therefore provide the Department of Environmental Affairs with the peace of mind that liquid effluent is being treated in an environmentally safe and responsible manner. The VSEP system is able to treat various type of waste effluent, thereby providing a proven technological solution for improvement in liquid disposal in South Africa.
The VSEP Advantage: Benefits of Leachate Treatment
- High filtration rates – VSEP is the only membrane filtration system offering high sustainable filtration rates, despite high suspended solids.
- Fouling Resistance – This is beneficial to our leachate due to the presence of ammonia and TDS which could not be broken down in the biological step without fouling the RO membrane. “The application of intense shear waves at the membrane surface prevents the age old problem of membrane fouling. The shearing action actually sweeps away the foulants from the membrane surfaces, making rapid filtration possible, even with high solids. There is no product loss and no high energy costs.”
- High solids – As the membrane leaf elements vibrate, the shear waves produced cause solids and foulants to be repelled and liquid to flow through the membrane pores unhindered.
- Engineered dependability – A self repairing membrane system, the VSEP has only two moving parts: the torsion spring, which is tested to assure infinite life; and the bearings, which lubricate automatically, and the patented redundant membrane system, which automatically self-repairs in case of membrane failure, thereby guaranteeing uninterrupted performance.