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首页> 外文期刊>Przemysl Chemiczny >Recovery of phosphates(V) from real wastewaters from phosphorus mineral fertilizers industry. Process kinetics
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Recovery of phosphates(V) from real wastewaters from phosphorus mineral fertilizers industry. Process kinetics

机译：从真实废水的磷酸盐（V）从磷矿物肥料行业的实际废水中恢复。 过程动力学

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摘要

Kinetic parameters describing continuous reaction crystallization of struvite from real P mineral fertilizers industry wastewaters (IWW) were detd. Test results were compared with kinetic data of struvite manufactured from real cattle liq. manure (CLM) and from a soln. without any impurities (WI). Kinetic model for ideal mixed suspension, mixed product removal (MSMPR) crystallizer was used assuming dependence of crystal growth rate on its size (Rojkowski exponential size-dependent growth). The impurities present in the wastewaters were a reason for pptn. of solid product of distantly different quality. The mean size of struvite crystals varied from 36.8 mu m (IWW) to 48.5 mu m (WI). Homogeneity within their populations, quantified by the coeff. of variation CV, varied from satisfactory (CV 64.6%, WI) to unfavorable (CV 98.8%, CLM) values. A rise of impurities concn. in a feed resulted in an increase of nucleation rate from 6.27.10(11)1(s.m(3)) ( WI) to 2.01.10(15) 1/(s.m(3)) (IWW). Linear growth rate of struvite crystals varied from 6.92.10(-9) m/s to 4.58.10(-9) m/s, resp.
机译：来自真正的P矿物肥料行业废水器（ICN）的斯特鲁维特连续反应结晶的动力学参数是DEDD。将测试结果与真实牛Liq制造的Struvite的动力学数据进行比较。粪肥（clm）和soln。没有任何杂质（Wi）。用于理想混合悬浮液的动力学模型，使用混合产物去除（MSMPR）结晶器假设晶体生长速率对其尺寸的依赖性（Rojkowski指数尺寸依赖性生长）。废水中存在的杂质是PPTN的原因。固体产物远端不同的质量。施坦斯晶体的平均尺寸从36.8 mu m（ICN）变化至48.5μm（Wi）。他们群体中的均匀性，由Coeff量化。变异CV，从令人满意的（CV 64.6％，WI）不等（CV 98.8％，CLM）值。杂质的崛起康全。在进料中导致从6.27.10（11）1（S.M（3））（Wi）至2.01.10（15）1 /（S.M（3））（IWN）的成核速率增加。斯特鲁维晶体的线性生长速率从6.92.10（-9）m / s变化至4.58.10（-9）m / s，REAC。

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