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Biogas plant projects

Hardferm dry anaerobic digestion plant to Jepua

Jepuan Biokaasu Oy began preparations for plant extension already in 2016 when the company began the environmental impact assessment procedure together with Doranova. The EIA process was finished in autumn 2017 and the environmental permit related to the plant extension was approved in spring 2018.

The aim of Jepuan Biokaasu is to grow by determinedly refining side streams originating from farms and food production industry into biomethane and organic fertilizers. For this, in the future, the company has to be able to process substrates which cannot be processed in a wet anaerobic digestion plant. Such substrates are, for example, rocks and sand -containing dry manures. Therefore, Jepuan Biokaasu decided to use the Hardferm dry anaerobic digestion concept developed by Doranova.

– We have, during the years, actively searched for a solution to digest contaminated fractions, such as fox manure and side streams of egg production , says Kurt Stenvall, CEO of BioKymppi Oy. – Currently planned, over 25 000 tons per year processing Hardferm-plant is currently the only one which has the technical solutions enabling the continuous anaerobic digestion with these challenging substrates, states Stenvall.

The preparatory work for the construction of the Hardferm-plant was started in autumn 2018 and the plant is intended to be operational at the end of 2019.

Jepuan Biokaasu Oy biogas plant

In autumn 2013, a biogas plant delivered by Doranova was implemented in Jepua. The biogas plant was implemented together with the German Weltec Biopower GmbH and it was designed to receive 90 000 tons of substrates annually. The feedstock mainly consists of pig slurry originating from nearby pig farms (transported via pipelines), manure from cows and animals bred for fur, and slaughterhouse products as well as from different types of plant and field biomasses.

The biogas plant has three approximately 4 000 m3 digestion reactors and nearly 6 000 m3 of gas storage capacity. The biogas produced in the anaerobic digestion is used in the heat generation for the biogas plant as well as for the needs for the nearby factory. A portion of the gas is enriched to be used as a biofuel in vehicles in the refueling station at the site, among other things. The digestate originating from the anaerobic digestion of the feedstock is utilized as a fertilizer in the nearby fields.

BioKymppi Oy biogas plant

The BioKymppi Oy biogas plant is located in Kitee, Finland, and it processes different types of biodegradable wastes and energy plants. By anaerobically digesting organic substrates the plant produces biogas from which the methane is further processed to electricity and heat. The digestate is utilized as different types of fertilizer products.

Doranova delivered in the year 2010 for the BioKymppi biogas plant a 2 x 160 kWh CHP-plant which produces electricity and heath to both the plant’s needs and for selling. We designed and executed also a biogas pumping station which takes care of the pumping of the gas produced by the biogas plant but also the gas originating from the adjacent landfill. In the year 2013, we continued the project by delivering a 160 kW CHP-plant for the nearby power plant.

It is a Doranova principle to take care of the customers throughout the life cycle of the plant operation; thus, we naturally take care of regular service and maintenance with regard to delivered equipment. The anaerobic digestion process of the plant was designed and delivered by Doranova’s German partner Weltec BioPower GmbH.

Biogas plants

Doranova’s history in the field of biogas plant deliveries began in 2010 when Biokymppi Oy was introduced. It is currently still co-owned by Doranova. Since then, Doranova has been further developing its plant concept and solutions based on practical experience gained from operating biogas plants.

Doranova’s latest biogas plant innovation is the easily scalable and cost-efficient Hardferm-biogas plant, whose efficiency is best demonstrated when processing the most challenging organic fractions.