The current trend towards larger pig farms increases their profitability but might harm animal welfare and the environment. More efficient pig manure management is a way to address this challenge. Available manure handling and utilisation systems may feature from 8 to 50% nutrient loss to the environment. Therefore, the proper choice of technological solutions is of high priority. In regard, the study developed a methodology including calculation, analysis and modelling techniques for the accurate accounting of manure amount, its fractions and their nitrogen and phosphorus content for different processing technologies with due regard to the limiting factors of the farm and the end-product consumer requirements. The methodology was applied to justify the best suitable processing technology for a large-scale pig farm in the Leningrad Region with 17,800 heads of pigs and 54,750 t of pig manure per year. The selected technology included manure separation into fractions, aeration and secondary sedimentation of the liquid fraction and passive composting of the solid fraction. It demonstrated the total amount of nitrogen (N) and phosphorus (P) in the end-products of 278.94 t per year, with the 26% total nutrients loss on all technological stages, and specific capital and operating costs of USD 55.5 per ton of manure produced. The methodology was tested by comparing the calculated data and the data from previous surveys of 15 pig farms in Russia. The differences between the values were found from 0.9 to 12.5% in mass; 2.8 to 13.9% in N content and 1.7 to 9.9% in P content. The developed methodology supports planning the production of the manure-based end-products in a given amount and with target nutrient content, depending on different processing technological solutions, achieving both economic and environmental goals.
Процессы и машины агроинженерных систем ственных и перерабатывающих предприятий и концентрирования загрязняющих веществ. Последующее окисление насыщенного органикой адсорбента в условиях сверхкритического водного окисления обеспечивает полную регенерацию бемита и переработку органических веществ с получением очищенной воды и избыточной энергии, что перспективно для решения проблемы энергоэффективной очистки стоков предприятий агропромышленного комплекса. Ключевые слова: органические примеси, наноструктурный бемит, адсорбция, сточные воды, молочная сыворотка, суспензия, гречишная лузга, отходы коксового производства, сверхкритическое водное окисление Для цитирования: Адсорбционно-окислительная технология переработки сточных вод предприятий агропромышленного комплекса / А. Ю. Измайлов [и др.] //
The world largest specialized international agricultural exhibition AGRITECHNICA-2019 took place in Germany on 10-16th of November, 2019 at the Deutsche Messe exhibition hall in Hannover. The exhibition hall covered an area of over 320,000 m² and included 28 sites. All the world-leading companies in the industry were represented at the exhibition. Around 600 new companies used this international market platform to introduce their products. The slogan of the exhibition AGRITECHNICA-2019 is: Global Farming – Local Responsibility. About 300 new products were registered during the exhibition. The electromechanical gearbox EAutoPower was awarded by gold medal. Other 39 winners were awarded by silver medals. The exposition mostly included models of self-propelled traction and harvesting machinery, as well as machinery for tillage and crop care. Special attention was paid to improvement of the undercarriage systems and particularly to remova-ble tracked running systems for tractors and other self-propelled vehicles with its tracked and wheeled-tracked embodiment versions. Almost every company showed different kinds of automa-tion and robotization solutions for partial operations in agriculture, both for basic tillage and weed control. The big attention is drawn to the significant contribution of the results of cooperation of individual manufacturers to the formation of the overall image of the exhibition. Labor decentraliza-tion tendencies to achieve the best results by both complete machines production and separate com-ponents release were noted. The domestic manufacturer Rostselmash received particular acknowl-edgment by winning a silver medal for the development of night vision system RSM Night Vision. Everything mentioned above allows us to conclude that, undoubtedly, the level of technical and technological preparation of agricultural machinery and equipment is increasing, which entails an expansion of the technological component of agricultural work.
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