Beijing sludge contract helps Cambi enter Chinese market

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Five-part Beijing sludge contract helps Cambi enter Chinese market

Beijing Drainage Construction Co. has awarded Cambi UK a contract to supply Thermal Hydrolysis Process (THP) technology to one of the largest sludge treatment projects in China.

The installation will be at Beijing’s largest wastewater treatment plant (WWTP) in Gaobeidian, which has a wastewater treatment capacity of one million m3/d, serving a population of about 3.2 million people.

The facility is owned and operated by the Beijing Drainage Group and Cambi’s THP technology will be fitted and operated by 2016.

As part of an ongoing strategic cooperation, another four large-scale sludge projects could also be potentially signed between 2016-2017, using THP and high dry solids digestion and high dry solids dewatering.

When operational, all five sludge plants could treat 6000 tonnes/day of sludge.

The Gaobeidian Advanced Digestion Plant (above) consists of a 20-reactor Cambi Thermal Hydrolysis plant with four process trains followed by Advanced Digestion and high dry-solids dewatering.

Eight of the old digesters will be demolished to make space for the THP and the Anammox process (see WWi article) for treatment of the liquid from dewatering the digested sludge.

Cambi said: “The THP-plant will process all the sewage sludge produced at the plant and thereby double existing digester loading and freeing eight of 16 existing anaerobic digesters, increase biogas production, produce a high dry solids bio-fertilizer, and replace a planned drying facility.”

Lei Shi, general manager of Beijing Drainage Construction Company, said: “Our partnership is truly a historic moment for China and will provide the country with an environmentally friendly solution to the treatment of sludge.”

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