Sofiyska Voda AD, our concession in Bulgaria, has been working on the installation creation of a combined heat and power (CHP) plant to generate power from biogas at Kubratovo wastewater treatment works.
This involved the installation of three CHP engines to allow the full utilization use of the biogas produced in the decomposition of sewage sludge, turning it into heat and electricity. Each engine is capable of producing 1063kW of electrical power and 1088kW of heat energy. 100% of the sewage sludge produced at the works now receives anaerobic digestion with all of the biogas produced during this process usedtilised by the CHP engines.
We are currently negotiating the best use of the electricity., Currently, we plan to sell all of the generated electricity to the national electricity company at a premium. The heat generated will be used on site. The water, heated in the heat exchangers to temperatures up to 80oC, is passed through a water distributor from where it’s fed into the existing heating system which is used to heat the digesters and all buildings on the works. 100% of the heat produced by the CHP process is utilised in this way.
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