Čistoća - waste disposal

On October 1, 2021, the ZGOS branch and the waste disposal activity on the regulated areas of the Jakuševec-Prudinec landfill for non-hazardous waste in the city of Zagreb and its surroundings were merged with the Čistoća branch. In addition to the economic activity of waste disposal, it performs the following activities: construction in accordance with the building permit, maintenance and management of constructed buildings and devices, energy activity of electricity production from renewable sources, and monitoring.
 
The Jakuševec-Prudinec landfill is a landfill for municipal and non-hazardous waste of the city of Zagreb and its surroundings and is a building that is being built in accordance with the Construction Act.

ZGOS was founded in 1998 as a company with the basic task of rehabilitating the unregulated Jakuševec Landfill, in order to prevent danger to the health of residents and pollution of the last sources of drinking water near Zagreb. The second goal was the adoption and implementation of the municipal waste management development strategy of the City of Zagreb, including the improvement of operational and financial results in the waste management system, ie to improve the performance of financial and municipal management (From the Loan Agreement / Information Memorandum). In 2006, the company ZGOS became an integral part of the company Gradsko komunalno gospodarstvo d.o.o., and then the company Zagrebački holding d.o.o.

After the rehabilitation works of excavation and relocation of old waste to the sanitary surface in 2003, the works on the Landfill continued in the form of construction of the Landfill and construction, maintenance and management of all subsystems on the Landfill, all in accordance with the core activity on which ZGOS was founded. .
 
Landfill Jakuševec has a daily capacity of roughly 971 ton/day of non-hazardous waste, which makes around 350.000 tones of non-hazardous waste per year. During last years the amount of waste decreased significantly (todays amount is around 260.000 tons/year).

 
The landfill is divided into 6 cells. The biggest, 6th cell, is divided into 3 separate parts. All cells have a bottom sealing layer with a drainage system. Cells 1 to 5 are closed and overlaid with final covering layer. The waste is currently being built in at the location of the 6/1 cell.
 
In the area of the landfill Jakuševec there is a small electrical power plant that produces electric energy from landfill gas.
 
The energy business of producing electric energy from landfill gas, is carried out in accordance with the permit issued by the Croatian energy regulatory agency. To distribute produced energy on the market, a contract with the company Hrvatski operater tržišta energije l.l.c. has been signed.
 
Landfill gas generated in the disposed waste is being transferred to gas engines that produce electric energy, through a gas pipelines network with condensation pots and gas wells.

The small electric power plant that produces electricity from landfill gas at the Jakuševec landfill is the first of its kind in the Republic of Croatia. In 2014, the power plant produced a total of 12,003,668 kWh of electricity. In 2015, a third generator was installed and a total of 17,524,144 kWh of electricity was produced, which is enough to meet the annual energy needs of approximately 5,000 households. In 2018, the power plant produced a total of 18,297,660 kWh of electricity, which is enough to meet the annual energy needs of approximately 6,100 households.

From December 2004 till Juni 2021 the amount of electricity produced at the gas facility (mTEO and GP4) was 176.940 MWh. From the landfill 172.339 thousand m3 of landfill gas was extracted.

From January to December 2020 the amount of electric energy produced and placed on the market was 20.203.432 kWh, (mTEO). The energy produced is sufficient to cover the average consumption over 12 months for around 6.700 households.
The technical examination of the mTEO plant (GP1, GP2 and GP3) was done in February 2018 and the operation certificate was issued 28.03.2018.
 
From January to Juni 2021, the gas facility has produced 10.256 MWh of electricity from renewable energy sources, which was fed into HEP's system and is enough to cover the average electricity consumption of around 6.840 households over the period of six months (mTEO).

From January to December 2020  the amount  of electric energy produced and placed on the market was 8.027.262 kWh, (GP4). The energy produced is sufficient to cover the average consumption over 12 months for around 2.700 households.

From January to Juni 2021, 4.026 MWh of electricity was sourced from this renewable energy source and fed into HEP's network. The amount of electricity produced is enough to supply around 2.680 households with electricity in the amount they would consume over the period of six months (GP4).

The technical examination of GP4, the landfill gas and combustion air cleaning system, as well as the reconstruction of the internal lighting system of the landfill was done December 1, 2020. The operating certificate was issued in February 2021.



The Prudinec / Jakuševec landfill is not just an ordinary area on which the almost million population of the City leaves everything it considers unnecessary and harmful. It is also a modern plant in which construction waste is recycled, compost and gas are produced with constant monitoring of groundwater, air, waste and wildlife.

The noise barrier around the gas facility was artfully spruced up during 2019

The ZGOS branch has an integrated quality management system ISO 9001: 2015 and an environmental management system ISO 14001: 2015.