Comparison of dried sludge and sludge ash for phosphorus recovery with acidic and alkaline leaching,Water and Environment Journal

当前位置： X-MOL 学术 › Water Environ. J. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Comparison of dried sludge and sludge ash for phosphorus recovery with acidic and alkaline leaching
Water and Environment Journal ( IF 1.7 ) Pub Date : 2020-08-26 , DOI: 10.1111/wej.12633
Neslihan Semerci ₁ , Saifurahman Ahadi ₂ , Sevil Coşgun ₂

Affiliation

Nowadays, the recovery of phosphorus has been in the spotlight due to its importance for food security and depleting sources. In this study, phosphorus recovery from dried sewage sludge and sludge ash by acid and alkaline leaching was evaluated. Optimum extraction time and temperature were determined as two hours and ambient temperature. Results showed the superiority of strong acidic conditions for leaching; 75 ml/g with 0.4N HCl and 25 ml/g with 0.6N HCl were determined as optimum conditions to achieve efficient phosphorus dissolution from sludge ash (94.6%) and dried sludge (91.1%), respectively, with the lower heavy metal concentrations. Lower L/S ratio put forward the dried sludge as a more advantageous resource for phosphorus extraction. Besides, by alkaline leaching of sludge ash and dried sludge, 60.3 and 70.3% phosphorus dissolutions were achieved with 75 ml/g and 1N NaOH; and the leachate was a suitable product for phosphorus precipitation due to its high pH.

中文翻译：

用酸性和碱性浸出法比较干污泥和污泥灰分回收磷的方法

如今，由于磷对粮食安全和消耗源的重要性，磷的回收已成为人们关注的焦点。在这项研究中，评估了通过酸和碱浸提从干燥的污水污泥和污泥灰中回收磷的方法。确定最佳提取时间和温度为两个小时和环境温度。结果表明强酸性条件对浸出具有优势。确定以75Nl / g的0.4N HCl和25Nl / g的0.6N HCl作为最佳条件，以较低的重金属浓度分别从污泥灰分（94.6％）和干燥污泥（91.1％）中实现有效的磷溶解。。较低的L / S比提出了干燥污泥作为磷提取的更有利资源。此外，通过碱浸出的污泥灰和干污泥分别为60.3和70。用75 ml / g和1N NaOH溶解3％的磷；由于其高pH值，渗滤液是磷沉淀的合适产品。

更新日期：2020-08-26

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11