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Recovery of ammonium and phosphate as struvite via integrated hydrolysis and incineration of sewage sludge
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2020-10-16 , DOI: 10.1016/j.jwpe.2020.101697
Moh Moh Thant Zin , Diwakar Tiwari , Dong-Jin Kim

A sustainable struvite production pathway was proposed for the recovery of NH4+-N and PO43−-P from sewage sludge by two different pretreatments. Hydrolysis and incineration of sewage sludge yields NH4+-N rich solution (NH4+-N/PO43−-P of 2.66 in the supernatant) and phosphorus rich sewage sludge ash (SSA), respectively. From the sludge hydrolysate and the leachate of SSA, 88.0 % of NH4+-N and 94.1 % of PO43−-P were successfully recovered as struvite. Spectroscopic and chemical analyses showed that the recovered product had a composition of PO43−-P (12.5 %), NH4+-N (5.3 %), Mg2+ (9.3 %). It also had high struvite content (92.6 %), high P bioavailability (91.2 %), and a very low level of heavy metals to be used as an effective and environmentally friendly fertilizer.



中文翻译:

通过污水污泥的综合水解和焚烧回收作为鸟粪石的铵和磷酸盐

提出了一种可持续的鸟粪石生产途径,通过两种不同的预处理方法从污水污泥中回收NH 4 + -N和PO 4 3-- P。污水污泥的水解和焚烧分别产生富含NH 4 + -N的溶液(上清液中的NH 4 + -N / PO 4 3-- P为2.66)和富含磷的污水污泥灰分(SSA)。从污泥的水解产物和SSA的浸出液中,成功地回收了88.0%的NH 4 + -N和94.1%的PO 4 3-- P为鸟粪石。光谱和化学分析表明回收的产物具有PO 4的组成3-- P(12.5%),NH 4 + -N(5.3%),Mg 2+(9.3%)。它还具有较高的鸟粪石含量(92.6%),高磷生物利用度(91.2%)和非常低的重金属含量,可用作有效和环保的肥料。

更新日期:2020-10-17
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