Bio Sterco is a modern manure processing plant that mainly processes sow manure from breeding pigs. 

The company was looking for a way to treat both the thin fraction of pig manure and the unseparated sow manure, not only on the farm but also to recover valuable nutrients.

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The recovery of ammoniacal nitrogen in the form of ammonium sulphate (40% aqueous solution) via a stripping and scrubbing process, proved to be the right technique for this purpose. This way, biological purification is relieved, oxygen can be saved, emissions reduced and valuable nitrogen recovered.

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In addition, in terms of water management, the aim was to further purify the effluent from manure processing with a plant-based system (reed bed) to maximise the use of purified water as drainage water during dry summers. Such as water in the air scrubbers to capture ammoniacal nitrogen, and cleaning water in the stables if microbiological requirements are met.