Phosphorrecycling durch Mitverwertung von Klärschlammaschen bei der Phosphorsäureherstellung

The approach of recycling phosphorus from sewage sludge ash by co-processing in conventional phosphoric acid production was investigated. Lab-scale experiments with real ashes and simulated industrial conditions showed that mixing of ash and phosphate rock prior to processing resulted in several disadvantages. As a solution the novel concept of return acid extraction is presented, which overcomes some of the identified shortcomings of direct mixing.     

静脉产业园餐厨垃圾协同处理项目运行实例和经济性分析

以广西某静脉产业园内餐厨垃圾处理厂为例,介绍了以“预处理+油脂提取+厌氧发酵+沼气净化利用”为主体的餐厨垃圾处理工艺,结合该厂三个月的运行数据,对该厂与生活垃圾焚烧厂协同处理进行了经济性分析。运行数据表明,该厂各系统能够稳定运行,日均餐厨垃圾处理量60.46 t.d_^-1,粗油脂产率2.37 %,吨垃圾平均产沼量为57.21 m_³。通过对餐厨厂与焚烧厂协同处理的经济性分析,结果表明与餐厨厂单独处理相比,协同处理年节省成本达94.83万元。