Bioplinska elektrana Orehovec d.o.o.

00 bioplinska elektrana orehovec

Head office: Sv. Petar Orehovec 97/A, 48267 Sv. Petar Orehovec

Location: Sv. Petar Orehovec 97/A, Orehovec

Person in charge: Đurđa Jakovljev, Member of the Board

Number of employees: 6

Company’s Registration Number: 070097507

VAT: 75434757177

IBAN: HR 6923400091110486415, PBZ d.d.


Tel: +385 48 850 134

Orehovec Biogas Power Plant d.o.o. constructed a 1.2 MW biogas plant in Orehovac, which was commissioned in September 2016. In order to efficiently use the waste heat from biogas, a bio-waste treatment plant will be built next to the biogas plant and the remaining heat will be disposed of for heating of public facilities.

Orehovec biogas power plant: 1.2 MW

Technology Selected: agriKomp
Selected contractors: agriComp and Hidroregulacija d.d.
Investment value: 4.467.382,00 EUR
Commissioning: in operation

The 1.2 MW biogas power plant is located in the municipality of Sveti Petar Orehovec (Sveti Petar Orehovec settlement) in the Koprivnica-Križevci County. In a rural area like the village of Sveti Petar Orehovec, the construction of a biogas power plant is an appropriate system for the closure of the agricultural production process, as it enables heat and electricity to be obtained, as well as for the provision of excellent fertilizer represented by the processed kosopstrat. The construction of a biogas power plant started in 2015. The first refueling of the biogas plant began in May 2016, and the plant started operating at full capacity in December 2016.

The biogas plant is designed as a continuous charge and will operate in the medium or mesophilic temperature range, in an anaerobic environment, that is, an environment without the presence of oxygen. The energy value of the biogas thus obtained is from 5.2 to 6.5 kWh / m3 of biogas. From this, 83.8% of usable energy will be produced in the co-production or cogeneration process, while the rest will be conversion losses. This energy produces approximately 42.1% of electricity and 41.7% of heat.

The generated electricity is transferred to the grid, while the heat produced will be used for the processing of feedstock for biogas production.

Figure 2: Proposed scheme of a two-stage biogas plant

Input material (biomass)

Raw materials for biogas production are divided into two basic groups:


Fertilizers: bovine and pig manure and manure, poultry manure;
Vegetable biomass: maize, sorghum, cereal and grass silage, fresh grass cuttings, forage residues, products;
Kosupstrata or waste from the food processing industry:
Animal by-products including food residues, fat, waste fruits and vegetables, compost, protein and carbohydrate-rich industrial waste water, fat breakdown waste.

n order to produce electricity from biogas, it is necessary to ensure stable and sufficient quantities of waste of biological origin, which is the raw material in production. The second component of bio-waste consists of slurry (liquid cow dung), which will be delivered by livestock farmers and farmers from the region with which purchase agreements have already been signed for a period of 15-20 years. Slurry is a problem for livestock farmers due to the legally prescribed method of disposal (in accordance with the European Union nitrate directive) and will be transported and provided free of charge to the biogas plant. The process of biogas generation – anaerobic digestion, requires, in addition to the abovementioned primary feedstock, the use of substrates. Different types of biomass can serve as a substrate for biogas production. Due to its favorable characteristics and proximity to suppliers, corn silage is used as a substrate for biogas production within the biogas plant.
For the purchase of electricity, a 14-year contract is signed with the Croatian Energy Market Operator (HROTE) at a preferential feed-in tariff, which is adjusted annually for inflation and rising energy prices.

Orehovec Biogas Power Plant:

Technology Selected: AAT

The object of the investment is the construction of a plant for primary processing of raw materials with a capacity of 23,000 tons per year in the municipality of Sveti Petar Orehovec (settlement Sveti Petar Orehovec) in the Koprivnica-Križevci County. In a rural area such as Sveti Petar Orehovec, the construction of a biogas power plant and bio-waste treatment plant is an appropriate system for closing the production and processing agricultural process, as it enables heat and electricity to be obtained, as well as for providing excellent fertilizer represented by the processed cos-substrate. In addition to the already built biogas power plant, a primary feedstock processing plant will be built. The construction of the primary raw material processing plant is scheduled for April 2017, with commissioning in the second half of 2017.



Figure 3. Possibilities of using food waste.

Investment in products for all biogas plants will produce synergistic effects; will link the increase in capacity utilization of biogas plants, will increase the utilization of waste heat from the plant, increase the use of renewable energy sources and enable the product to be a substitute for corn silage.

Directive 2008/98 / EC lays down basic concepts and definitions relating to waste management, such as the definition of waste, recycling, recovery. This includes two new recycling and recovery targets that are to be achieved by 2020: 50% preparing to reuse and recycle certain waste materials from households and other origins to similar households. The directive requires Member States to adopt waste management plans and waste prevention programs.

A bio-waste treatment plant will meet two critical needs:

will provide municipalities with a cost-effective alternative to landfilling (Directive 2008/98 / EC on waste), and
This will meet the growing demand for AD as a major way of converting waste food into renewable energy.

The bio-waste treatment plant will offer:

Customized local bio-waste management solution
Large unpacking capacity
Comprehensive solution for packaged and unpackaged, solid and liquid food waste
Our service is a cost effective solution
A cheaper way to dispose of and recycle food waste from landfills
Long-term contracts offer security
Sustainable waste treatment
Reduced carbon emissions
An eco-friendly solution for the production of renewable energy and nutrient-rich fertilizer
Security against the proposed substantial increase in landfill tax

For the purposes of treatment of the primary substrate, the construction of a treatment plant is foreseen next to the biogas plant. The primary substrate is transported by trucks to the raw material receiving area.

Key numbers of non-hazardous waste that can undergo anaerobic digestion are listed in the Ordinance on By-Products and Abolition of Waste Status (Pursuant to Article 15, Paragraph 9 of the Sustainable Waste Management Act (Official Gazette 94/13)).

Due to its technical characteristics, only pure biowaste can be recovered, with no inorganic origin. However, large quantities of biowaste come in packaging, so it is necessary to separate organic from inorganic waste before entering fermenters. For this reason, a biogas plant from the many available types of bio-waste in cities must contain the part in which pre-treatment takes place. In this part of the process, all impurities are removed.

The production of biogas from bio-waste collected in cities requires the construction of a plant that must be adapted to the composition of that waste. This means that a significant part of the investment must be devoted to the pre-treatment of the input raw material in order to adequately prepare it for fermentation. Nevertheless, a profitable plant can be built. However, it must always be borne in mind that the two previously mentioned aspects are: replacing fossil energy sources with renewable energy and contributing to the protection of the environment through the energy recovery of waste, which is now largely disposed of in landfill and reducing greenhouse gas emissions.