Biogas plants
at pig farms

Biogas plants at pig farms

Pig manure and pig slurry are waste products and substrates for biogas production at the same time.


The less water the better

There are 3 systems for pig manure removal and pig keeping: Self-flow (cork / Danish or Spanish system/ slot floor), Hydro-flush and Cold-keeping.

  1. Self-flow (cork / Danish or Spanish system/ slot floor)

    Adding water to manure 1:1. Manure is accumulated in a bath with a valve which is opened once every 1-3 weeks. Self-flow is ideal for biogas production. New pig farms mainly use the self-flow system.

  2. Hydro-flush

    Adding water to manure 1:10. Manure is washed off constantly. The system is mainly used on old 100,000-head pig farms. Biogas reactors are very large. The organic load in the reactor is very low. The construction of biogas plants for hydro-flush manure is not recommended if the reason for construction is based on economics. The biogas plants can be built only as environmental projects. Hydro-flush is often confused with a self-flow.

  3. Cold-keeping

    Pigs are kept in tent hangars constantly on deep bedding. Manure is removed only once after slaughter. With this method, a biogas plant does not make sense due to gas having left the manure over 5 months. And high bedding content creates difficulties when mixing substrates in reactors.

Systems for pig keeping

Zorg Biogas has built several biogas plants for pig farms. Examples are a biogas plant, 125 kW, for a pig breeding operation with 1,500 sows Demis-Agro Ltd (Podgorodnoe, Ukraine), a biogas plant, 635 kW, for a full-cycle pig farm Porco-Bela Ltd (Cimiseni, Moldova).

In Podgorodnoye, oil from chips and confectionery waste are added to the manure.

To calculate a quotation for a biogas plant, please fill out the questionnaire for pig farms.

Zorg Biogas’s plants for this industry







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