APPLICATION OF OXIDIZING PYROLYSIS FOR PROCESSING OF ORGANIC WASTE

• Datum: 2021
• Автори та афіліації: V. Klius — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.; S. Klius — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.; N. Maslova — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20A Hnata Khotkevycha St., Kyiv, Ukraine.
• Ключові слова: keywords
• Hauptverfasser: Klius, V., Klius, S., Maslova, N.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Institute of Renewable Energy National Academy of Sciences of Ukraine 2021
• Schlagworte: manure; sewage sludge; oxidative pyrolysis; organic fertilizers.
• Online Zugang: https://ve.org.ua/index.php/journal/article/view/304
• Назва журналу: Vidnovluvana energetika

The analysis of known methods of processing chicken manure and sewage sludge is performed. Thermal processing of these wastes by oxidative pyrolysis is proposed. The high-temperature installation of periodic action for carrying out experimental researches is created. Granules from manure and sewage sludge are produced. In the process of oxidative pyrolysis, the moisture of the manure is converted into steam, which interacts with the hot carbon and activates it. After processing, the mass of manure decreases by 2-3 times, and the content of nutrients (P2O5, K2O) increases in comparison with the original product. The resulting product does not contain pathogenic microflora, has a porous structure and sufficient mechanical strength, which is important for its transportation.. As a result of manure processing, two products were obtained: carbonized manure and combustible gas with a heat of combustion of 5.8… 6.1 MJ/m3. The content of nutrients in the carbonized manure was: P2O5 - (14.0… 18.8 %); K2O - (7.8… 11.1 %). Iodine activity - 22.3… 24.2 %. Two batches of sludge were selected for processing: sludge of long-term storage (over 20 years) of sewage treatment plants in Kyiv and fresh sludge (3 years) of Lviv. In the process of sewage sludge treatment it was found that at a temperature of 800 - 850 °C the coke residue is sintered, so the maximum temperature was limited to 700 °C. The content of P2O5 in the carbonized sludge was 17.3…23 %. The experiments confirmed the hypothesis of the possibility of thermal processing of manure and sludge by oxidative pyrolysis into unconventional organic fertilizers containing phosphorus and potassium. According to the European Green Deal, it is planned to reduce the use of mineral fertilizers and plant protection products by 20% in the next decade. It is possible to replace traditional mineral fertilizers with organic: carbonized manure and carbonized sludge. Bibl. 11, table 1, fig. 3.