10.07.2015 Views

FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za

FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za

FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

August 2010 35 8848Construction of a leachate <strong>co</strong>llection systemThe leachate <strong>co</strong>llection system will be equipped with suitable drains or <strong>co</strong>llection pipes thatdirect the gravity flow of leachate to defined <strong>co</strong>llection points or sumps from which it can be<strong>co</strong>llected <strong>for</strong> treatment.Construction of a leakage detection systemThe leakage detection system will be <strong>co</strong>nstructed to intercept any leachate that may passthe barrier of the liner. This leachate is then directed to separate leachate <strong>co</strong>llection sumpsor sewer, where the quantity and quality can be monitored and from which accumulatedleakage can be removed or passed through to the sewer system. This system is designed tofulfil the requirements <strong>for</strong> the early warning monitoring of leakage given in Section 6 of theMinimum Requirements <strong>for</strong> Monitoring of Waste Management Facilities, Se<strong>co</strong>nd Edition,1998.Figure 7: Example of a Leakage Detection System.Construction of gas management systemsA gas management system is <strong>co</strong>nstructed to extract gas by applying suction to a system ofper<strong>for</strong>ated pipes within the waste site to reduce odour problems and the explosion ha<strong>za</strong>rd.When organic waste de<strong>co</strong>mposes without the presence of oxygen, anaerobic fermentationslowly produces landfill gas. <strong>Landfill</strong> gas <strong>co</strong>ntains 40-60% methane, with the remainderbeing mostly carbon dioxide. Methane is 23 times more potent than carbon dioxide when it<strong>co</strong>mes to its properties as a greenhouse gas, making it a key climate change gas to address.Burning methane produces energy, carbon dioxide and water. This is a very useful out<strong>co</strong>meas besides being an energy source, the hugely potent methane is replaced by the<strong>co</strong>nsiderably less potent CO 2 . A gas management system will there<strong>for</strong>e capture the methaneand <strong>co</strong>mbust it <strong>for</strong> energy. It can be used to produce electricity, or used directly <strong>for</strong> <strong>co</strong>okingand <strong>for</strong> space and water heating. When <strong>co</strong>ncentrated and <strong>co</strong>mpressed, it can also be usedas a vehicle fuel source.ZITHOLELE CONSULTING

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!