Technische Hochschule Mittelhessen - University of Applied Sciences, ZEuUS, 35390 Giessen, Germany.
Waste Manag. 2013 Mar;33(3):540-4. doi: 10.1016/j.wasman.2012.07.009. Epub 2012 Aug 9.
The substitution potential of sewage sludge for German primary phosphate imports has been estimated as 40%. Yet, a marketable option for the full scale recovery has been lacking. This study focuses on a full-scale process for the manufacture of a P-fertilizer from sewage sludge ash (SSA) adapted from the production of Triple Superphosphate. Given (i) conformity of the input with phosphate ores mined from sedimentary deposits, (ii) comparability of the product with a commercially available P-fertilizer regarding contaminant levels, P-fractionation and yield effects, and (iii) compliance of the output with the German Fertilizer Ordinance the RecoPhos P 38 fertilizer was discharged from the waste legislation regime. The fertilizer is currently being produced at a rate of 1000 tonnes per month and sold at a competitive price.
估算结果表明，城市污水污泥替代德国一级磷矿进口的潜力为 40%。然而，一直缺乏一种可用于大规模回收的可行方案。本研究专注于采用源自生产三料过磷酸钙的方法，对城市污水污泥灰（SSA）进行大规模生产磷肥料的工艺。鉴于（i）输入原料与沉积矿床中开采的磷矿石一致，（ii）产品与市售磷肥料在污染物水平、磷分馏和产量效果方面具有可比性，以及（iii）输出符合德国肥料条例，RecoPhos P 38 肥料已从废物立法制度中排出。该肥料目前的月产量为 1000 吨，售价具有竞争力。
