Pilot Thermophillic Digestion at eThekwini Water and Sanitation

Published Sunday, 15 May 2016

2016 02 04 (2)

Thermophilic digestion of sewage sludge can increase the energy recovery at waste water treatment works (WWTW) to reach energy self-sufficiency. By increasing the digestion temperature to 52 – 55°C, higher efficiencies can be achieved. For a utility, this translates in potential additional income from electricity production by a CHP, lower polymere consumption costs and lower sludge disposal costs. Aquest Colsen will design, build and operate for 6 months a pilot installation to demonstrate the effects of Themophillic Digestion at Kwamashu wastewater treatment works in the eThekwini municipality (Durban). This pilot will be designed according to the industry's most recent standards for heating and mixing digesters and control of process parameters. The pilot consists of a fully automated primary and WAS feeding mechanism, a 20 m3 digester, digestate disposal system and measuring equipment. On our website, frequent updates about the construction of the pilot plant and the results will be published.

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