Digestāta un koksnes pelnu maisījumu ražošanas tehnoloģija = Production technology of digestate and wood ash mixtures
2023
Adamovičs, Aleksandrs | Millers, Jānis
In order to promote a balanced development of agriculture and forestry, scientists of the Latvia University of Life Sciences and Technologies (LBTU) within a cooperation project of nine partners have undertaken to use the by-products of biogas production plants and cogeneration plants for the purpose of soil liming and fertilization, creating a new innovative product from their mixtures. Wood ash was mixed with digestate according to certain proportions, which are based on laboratory studies guided by the chemical composition of the raw materials. The set of machines and aggregates required for the preparation and spreading of the new type of fertilizer on the field was made. Digestate, after complete development in bioreactors, is fed to the mechanical screw press separator, where it is divided into solid (dry matter 25 % <) and liquid (dry matter 3 % >) fractions. The digestate of solid fractions is mixed with wood ash in portions in a screw-type mixer equipped with electronic scales. The ingredients are poured in parts so that the mixer mixes a uniform mass. The mixing process for each batch takes 10–15 min to obtain a perfectly uniform mixture.
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Издатель Latvijas Biozinātņu un tehnoloģiju universitāte
