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161.
Leaching of phosphorus from incinerated sewage sludge ash by means of acid
extraction followed by adsorption on orange waste gel 总被引:2,自引:1,他引:1
Ashes from sewage sludge incineration have a high phosphorus content, approximately 8% (W/W), which indicates a potential
resource of the limiting nutrient. Incineration of sewage sludge with subsequent recovery of phosphorus is a relatively new sludge
treatment technique. In this article, the leaching of phosphorus by using sulfuric acid as well as hydrochloric acid by means of several
batch experiments was presented. At the same time a selective recovery of phosphorus by adsorption was also discussed. The e ects
of acid concentration, temperature and time on extraction were studied. The phosphorus leaching increased with the increase in acid
concentration and temperature. Kinetic studies showed that the complete leaching of phosphorus took place in less than 4 h. Selective
adsorption of phosphorus by using orange waste gel provided a hint for recovery of this natural resource, which eventually could meet
the ever-increasing requirement for phosphorus. The overall results indicated that the incinerated sewage sludge ash can be treated with
acid to e ciently recover phosphorus and thus can be considered a potentially renewable source of phosphorus. 相似文献
162.
163.
广州市固定废物处置与利用产业发展浅析 总被引:1,自引:0,他引:1
章提出广州市首批可考虑发展的固废处置和利用产业项目为:城镇垃圾焚烧发电,废轮胎回收利用,废蓄电池和废干电池回收利用,废弃物安全处置,废塑料综合利用,还有规模较小的电子线路板刻蚀废液、废日光灯管、以及废显影液等回收利用。 相似文献