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We design leachate extraction and recirculation systems, using pneumatic and electric pumps. Whatever your needs, we can design a system that will fulfil your requirements. We have developed innovative designs, such as our combined gas / leachate recirculation system:
We designed the system it and installed it at Ongar
Landfill site. It utilises 125mm pin wells with 2” steel casing. 36 pin wells
were installed in the landfill, utilising the vibrator technique perfected by
Landfill Pipe and Construction. These were connected in to a purpose built
manifold system using 6 off 63mm lines, graded such that there is a fall from
the manifold to the wells, generally as our schematic drawing (see below).
The system is designed for optimum control of leachate into the landfill site,
together with optimum control of the gas taken from the site. It is possible to
recirculate leachate into any individual line whilst extracting gas from the
others, or vice versa. A period of time of approx 1 hour (may vary from site to
site depending on waste type) should be given before extracting gas after
re-circulating leachate, to allow an leachate in the feed lines and wells to
dissipate into the waste. The pressure gauges fitted into the manifold are
Click on thumbnail drawing below to show schematic
Useful Links on Leachate Management: PPC Technical Guidance for the Treatment of Landfill Leachate Technical paper: leachate production and characterisation by G.J Farquhar Full-Scale Experiences with Leachate Recirculating Landfills - Case Studies D Reinhart Hydrodynamic Modeling of Leachate Recirculation, Mathematical modelling of leachate production Technical paper on leachate recirculation and benefits by Debra R Reinhart and A Basel Al-Yousfi |
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Send mail to
marcus@landfillpipe.co.uk with
questions or comments about this web site - or to post a blog of your own!.
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utilised to check that there is no residual back pressure in the system prior to
gas extraction. Ideally, a separate pump should be fitted to feed leachate to
the manifold from a site based
leachate
tank (the exiting extraction pumps were used at Ongar). The specification of
the pump will vary from site to site, based upon the position of the tank from
the manifold and the relative height of the tank to the manifold. This system
was design to feed six lines, but this can be varied as required.