P-RoC-Phosphorus Recovery from Wastewater by Crystallisation of Calcium Phosphate Compounds
P-RoC-Phosphorus Recovery from Wastewater by Crystallisation of Calcium Phosphate Compounds
复制标题
通过磷酸钙化合物结晶从废水中回收 P-RoC-磷
DOI：
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
R. Nüesch
中科院分区：
文献类型：
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作者：
U. Berg;G. Knoll;E. Kaschka;V. Kreutzer;D. Donnert;P. Weidler;R. Nüesch
P-RoC工艺--通过磷酸钙结晶直接从水相中回收磷--是为了通过应用水合硅酸钙（CSH）化合物或合成雪硅钙石颗粒作为结晶晶种材料同时从城市废物和工业过程沃茨中去除和回收磷而开发的。首先在固定床反应器中进行了实验室和中试规模的实验研究。在连续搅拌反应器技术的开发和优化，以减少操作和维护工作的过程。除了种子材料的组成和粒度以及反应器中的水力停留时间（HRT）外，P-RoC工艺的效率和寿命主要受废水的初始P浓度控制。P-RoC被证明也可用于处理高DOC和富磷工艺沃茨。在长期固定床实验中，生成的结晶产物中总P（P-tot）含量至少为10- 11% P-tot，这对于磷工业中天然磷矿的替代具有前景。矿物学研究（FTIR-ATR，XRD）证明使用城市污水在种子材料表面上形成羟基磷灰石（HAP）样涂层。使用工业工艺用水，形成的结晶产物是透钙磷石。
The P-RoC process – the phosphorus recovery straight from the aqueous phase by crystallisation of calcium phosphate – was developed in order to simultaneously remove and recover phosphorus from municipal wasteand industrial process waters by applying calcium silicate hydrate (CSH) compounds or synthesised tobermorite pellets as crystallisation seed materials. At first, the experiments were performed in fixed bed reactors in laboratoryand in pilot scale. In continuation stirred reactor technique was developed and optimised in order to reduce operation and maintenance efforts of the process. Apart from the composition and grain size of the seed materials and the hydraulic retention time (HRT) in the reactor, the efficiency and longevity of the P-RoC process was mainly controlled by the initial P concentration of the wastewater. P-RoC proved to be feasible to treat also highly DOCand P-enriched process waters. Total P (P-tot) contents in the generated crystallisation products of at least 10-11% P-tot were achieved in long-term fixed bed experiments, which was promising for the substitution of natural phosphate rock in the phosphorus industry. Mineralogical investigations (FTIR-ATR, XRD) proved the formation of hydroxyapatite-(HAP) like coatings onto the surface of the seed materials using municipal wastewater. Using industrial process water, the crystallisation product formed was brushite.
影响因子：
15.6
作者：
W. Wu;G. H. Nancollas
通讯作者：
W. Wu;G. H. Nancollas