Latest News - Ho Chi Minh Landfill Leachate Treatment Project

In March 2009 Wehrle won an order for a full-size permanent leachate treatment plant on the site of Da Phuoc in Ho Chi Minh City, Vietnam. This is the follow-up order to a two-stage reverse osmosis plant that had been installed by Wehrle previously in 2007 as a preliminary leachate treatment plant.

The new full scale plant will be based on Wehrle Membrane Bioreactor (MBR) technology and will comprise lagoons for the storage of the leachate during the rainy season, one denitrification basin, two nitrification basins, an ultrafiltration system and, as secondary treatment, a nanofiltration membrane system. Wehrle will also deliver a sludge dewatering unit.

The plant design is for an inlet wastewater flow of 1.000 m³/day with a COD of 20.000 mg/l, a BOD5 of 12.000 mg/l and ammonia-N of 2.100 mg/l. The treated water has to meet the very strict outlet requirements for direct discharge of COD < 100 mg/l and ammonia-N < 10 mg/l.

Da Phuoc is a huge landfill site being newly constructed according to western landfill standards. When finished it will cover 128 hectares where 3000 tonnes per day or 1.100.000 tonnes per year of municipal solid waste can be deposited. The landfill site will be operated by Vietnam Waste Solutions Inc., a subsidiary of the well-known Californian Waste Solutions business.

Author: Dr. Miriam Weissroth

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