Možnosti využití fugátu (kapalné frakce digestátu z bioplynových stanic) jako alternativního hnojiva

Abstract

The presented diploma thesis deals with the issues of digestate liquor utilization – a liquid fraction of digestate, which is, as one of the products of biogas plant, used as an alternative fertilizer for agricultural purposes. Theoretical part provides information about the process of anaerobic fermentation occurring in biogas plants, discuss the process’ output products and the possibilities of their use. Predominantly it focuses on digestate liquor, its features, legislative requirements a possible restrictions of its use as a fertilizer. Practical part evaluates liquor’s suitability as an alternative fertilizer. The evaluation is based on field and laboratory experiments on maize cultivation (hybrid KWS Agro Vitallo). The digestate liquor used in experiments was obtained by centrifuging the digestate from biogas plant Farma Stonava, which use pig manure and corn silage as input raw materials. Results of field and laboratory experiments, including analyses of soils and phytomass and subsequent comparison of liquor’s fertilizing effects with the effects of artificial fertilizers are comprised in practical part as well.