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Prudinec landfill degassing system

From January to December 2018, the gas facility has produced 18.297.660kWh of electricity from renewable energy sources, which was fed into HEP's system and is enough to cover the 

Prudinec Landfill degassing system consists of:

1.     GN - gas network - landfill body degassing system consists of:

  • 131 gas wells with control regulator valves
  • Approximately 7.5 km of gas pipelines with vapour traps, condensate collection manholes and pits
  • Three temporary degassing gas lines at the work surface where waste is deposited daily

2.     Gas plant mTEO consists of:

  •        Three high-temperature flares with compressors with the capacity of 1,700 m3 of gas per hour
  •        Three gas engines with generators with the capacity of 525 m3 gas per hour per engine
  •        Three generators with a total power of 3 MW 



Degassing system:

Perforated pipes are sonded into the layers of waste deposited at individual finished surfaces to collect the gas generated by the decomposition of the organic waste component. The gas is then extracted using compressors and conveyed to the biogas collecting station using an underground gas pipe system.

Three temporary degassing lines, which are used to actively degas the surface during construction (surface area 6/1), have also been added to the active degassing system. Since December 2014. 4,45 million m3 of landfill gas was extracted during  2015, 2016, 2017 and up until December 2018. This gas was then used in the production of electricity from renewable energy sources.
The landfill gas collecting station continually analyses and controls the chemical composition and the quality of the landfill gas. Compressors are used to compress the extracted gas and convey it to the consumers, mainly to the gas engines-generators for the generation of electricity, which is fed into HEP
s system. The remaining amount is thermally processed, i.e. incinerated at high-temperature flares.

 

mTEO - Gas facility:

  • From December 2014 to December 2018 the gas facility has produced 110.826 MWh of electricity; 133.603 Tis.m3 of landfill gas has been extracted from the landfill.

  • In 2014, 12.003.668 kWh of electricity was generated by two gas engine-generators, which is enough to cover the average annual electricity consumption of around 4.000 households.
  • A third gas engine-generator was added to the existing two on February 13, 2015. Since then, the three gas engine-generators have produced 17.524.144 kWh of electricity, which is enough to cover the average annual electricity consumption of around 5.500 households.
  • This success was then picked up again in 2016, when 19.006.584kWh of electricity was produced from renewable energy sources using all three gas engine-generators. This amount of electricity, which is enough to cover the average annual electricity consumption of around 6.300 households, was fed into the system of the Croatian Electric Company (Cro. “HEP”).
  • During 2017, 13.609.660 kWh of electricity was produced from renewable energy sources and fed into HEP's system. This decrease in production in comparison to 2016 was caused by engine halts and major overhauls done on two of the gas engine-generators (including a raise in E60 overhaul intervals to 24.000 work hours). The produced electricity is enough to cover the average annual electricity consumption of around 4.500 households.
  • From January to December 2018, the gas facility has produced 18.297.660 kWh of electricity from renewable energy sources, which was fed into HEP's system and is enough to cover the the average annual electricity consumption of around 6.100 households


 
Last modified: 25/3/2019