Green Energy
First Sludge from Thermal Pressure Hydrolysis System to Digester at WWTP Echten
May 21 2015
Last week, the TPH pilot plant at WWTP Echten was put into operation. The first batch of sludge is hydrolysed with steam and pumped to the digester.
In a thermal pressure hydrolysis (TPH) plant, a pre-treatment of the sludge takes place by the use of steam injection. After this pre-treatment, the sludge is pumped to the sludge digestion plant, also built by HoSt (the Netherlands). With the TPH-technology, an increased biogas production, a reduction of residual sludge, and an improved dewaterability is expected. This results in higher revenues, lower costs, and less waste.
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