Currently, up to 50 % of pork is produced on small, medium and large pig farms with a number of pigs from 1,000 to 12,000. The liquid manure produced at these enterprises poses an environmental threat in the places of its accumulation and storage, since there are no effective technologies for its processing into organic fertilizers. The aim of the study is to increase the efficiency of processing organic waste from pig farms while developing a mobile unit to involve potential waste in circular economy. The analysis of technologies and technical means of processing liquid manure has shown that manure separation into fractions by a mobile unit is the most promising. The main element of the mobile unit is a brush auger, as well as the auxiliary equipment installed on 2PTS-4 tractor trolley. The kinematic scheme of the mobile unit, its cycle of operation and the cyclogram of the technological process of separation of liquid manure into solid and liquid fractions are presented. It has been established that the performance of the mobile unit depends on the performance of the brush auger, the volume of processed manure, the number of manure collectors and the distance between them. It has been experimentally established that with a brush auger capacity of 40 m3/h, the manure processing cycle time varies from 45 minutes (a farm for 1,000 heads) to 551 minutes (a farm for 12,000 heads). With a brush auger capacity of 30 m3/h, these indicators increase by 28.4 %. The daily yields of the produced solid fraction for the indicated livestock range from 2.88 to 34.51 tons, the liquid fraction – from 24.12 to 289.49 tons. The indicated volumes are the initial product for the production of solid and liquid organic fertilizers.

Bondarenko Anatolii M., Kachanova Lyudmila S., Baryshnikov Aleksei V.

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