Latest News - Shanghai Landfill Site Project

The city of Shanghai has one of the world’s largest landfill sites for municipal solid waste disposal - the Laogang landfill site. Here, on a 341 hectare site, 8000 tonnes of domestic waste is being deposited every day. The total capacity of the Laogang site is around 80 Million m³. The landfill site is operated by Veolia in cooperation with MSW Laogang.

The untreated solid waste produces approximately 950 m³/day of leachate that needs to be treated. The order for the Membrane Bioreactor (MBR) leachate treatment plant has been placed with Wehrle Environmental’s division in Changzhou, with Wehrle’s facilities in Emmendingen, Germany, delivering the engineering and the membrane system as well as Wehrle’s special injection system required for the aeration used in the bioreactor.

Leachate is always a difficult type of wastewater to treat. In this project, the raw wastewater has a COD of 32.000 mg/l, 2.800 mg/l of ammonia and with a high level of suspended solids at 2000 mg/l TSS. The wastewater will first be treated using a Huber ROTAMAT before entering the MBR system. The effluent from the leachate treatment plant will have a COD of 1000 mg/l, 150 mg/l of ammonia and a TSS of 400 mg/l. The treated leachate will then be directed to the municipal sewerage system, fulfilling the ‘Standard 3’ of the Chinese Wastewater Requirements for indirect discharge.

With this order, Wehrle again demonstrates its strong position in the Chinese market in the field of wastewater treatment.

Author: Dr. Miriam Weissroth

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