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林胖胖的兔子鐵蟲 (初入文壇)
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[求助]
英翻中 翻譯一個標(biāo)題 跪謝�。�！
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Hazardous animal waste carcasses transformation into slow release fertilizers 簡明通順 如果看上去專業(yè)點就更好啦!!! 跪謝�。�！ |
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一志愿南京理工大學(xué)085701資源與環(huán)境302分求調(diào)劑
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ssssllllnnnn 
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2樓2015-11-23 20:22:29
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Because of the need to address disposal of materials infected with pathogens new regulations have come into effect for the transport and disposal of dead farm animals or carcasses. For precautionary reasons, disposal to landfill, composting, biogas generation or fertilizer use are banned recycling paths because of incomplete knowledge about contamination transmission paths. Thermal treatment is recognized as a safe elimination process. Animal wastes have a high calorific value (above 16 MJ/kg). However, combustion of the organics leaves mineral residues (near 30%). The ashes contain mostly calcium and phosphate with some sodium, potassium and magnesium. We have examined the transformation of the ashes into a slow release fertilizer. We used a mixture of acids to partly dissolve the combustion residues and form slurry. In a second step, base was added to neutralize and solidify the reaction mixture. The final product was a whitish polycrystalline solid. Leaching tests were made to evaluate the nutrient release rate in laboratory columns. Water leachates were analyzed for up to ten pore-bed volumes and showed, as expected, large differences in release rates. Nitrate release was slowed and phosphate did not level even after ten pore-bed volumes. This demonstrates that insoluble precipitates (gypsum) contribute to control soluble ion release. 看完這篇文章的摘要可以將標(biāo)題譯為: 動物有害殘骸制取緩釋肥 |
3樓2015-11-24 13:16:09
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