Landfill Leachate MBR Plant Utilizing PTFE MF Membrane

PTFE (polytetrafluoroethylene) MF/UF membrane has a unique highly porous three-dimensional fibril structure not seen in other polymeric membranes. PTFE is temperature resistant and exceptionally high chemical resistant. Its temperature resistance allows for treatment of raw water at higher temperature and the chemical resistance allows cleaning by harsh alkalis in pH ranging from 0 – 14. An increased attention is recently paid to waste management system from view point of environmental sustainability. Leachate from landfill site, designed to fill incinerated residues, contains high-concentrated salts and low-concentrated organics (BOD, COD etc.) as well as a trace amount of substances like environmental endocrine disruptors and dioxins which cannot be easily decomposed. Meanwhile incineration is not really popular in many countries. Wastes are directly filled in the landfill site without incineration. Leachate from such landfill site contains a high amount of organics. An advanced treatment technology is adopted to treat landfill leachate and polymer composite membrane is used in the treatment process. Equipment in Japan with RO and NF as well as that in China with MF and NF are herewith described.

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