Phosphorus leaching from soils amended with thermally gasified piggery waste ash |
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| Authors: | Ksawery Kuligowski Tjalfe Gorm Poulsen |
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| Institution: | 1. Department of Civil and Environmental Engineering, National University of Kaohsiung, Kaohsiung, 811, Taiwan, ROC;2. Department of Civil Engineering and Engineering Mechanics, Columbia University, 10027 New York, USA;1. Department of Applied Environmental Science (ITM), Stockholm University, Stockholm SE-106 91, Sweden;2. Swedish Geotechnical Institute (SGI), Linköping SE-581 93, Sweden;1. College of Life Science, Taizhou University, Linhai 317000, China;2. Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;3. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou 310018, China;1. Department of Nursing, St. Mary’s Junior College of Medicine, Nursing and Management, Yilan, Taiwan, ROC;2. Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC;1. National Engineering Laboratory for Hydrometallurgy Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Science, Beijing 100049, PR China;1. Environmental and Nano-Sciences Research Group, Department of Chemistry, University of the Western Cape, Bellville, South Africa;2. Department of Ecology and Resources Management, School of Environmental Studies, University of Venda, South Africa;3. Fossil Fuel and Environmental Geochemistry Group, Department of Earth Sciences, University of the Western Cape, Bellville, South Africa |
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| Abstract: | In regions with intensive livestock farming, thermal treatment for local energy extraction from the manure and export of the P rich ash as a fertilizer has gained interest. One of the main risks associated with P fertilizers is eutrophication of water bodies. In this study P and K mobility in ash from anaerobically digested, thermally gasified (GA) and incinerated (IA) piggery waste has been tested using water loads ranging from 0.1 to 200 ml g?1. Leaching of P from soil columns amended with GA was investigated for one P application rate (205 kg P ha?1 corresponding to 91 mg P kg?1 soil dry matter) as a function of precipitation rate (9.5 and 2.5 mm h?1), soil type (Jyndevad agricultural soil and sand), amount of time elapsed between ash amendment and onset of precipitation (0 and 5 weeks) and compared to leaching from soils amended with a commercial fertilizer (Na2HPO4). Water soluble P in GA and IA constituted 0.04% and 0.8% of total ash P. Ash amended soil released much less P (0.35% of total P applied in sand) than Na2HPO4 (97% and 12% of total P applied in Jyndevad and sand, respectively). |
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