Process for removing phosphorus from phosphorus water by using quantitative crystalline limestone and gypsum

结晶灰岩和石膏对富磷水体除磷的定量应用工艺

Abstract

The invention provides a process for removing phosphorus and recycling the phosphorus from phosphorus water or sewage by using quantitative natural mineral. The process comprises the following steps: weighting crystalline limestone powder and gypsum powder, with grain size of 150 to 800 meshes, mixing the powder with a weight ratio of 4:1 to 14:1; reacting for 1 to 12 hours at 15 to 30 DEG C in a solution having an initial phosphorus concentration of 1000mg/L to 2mg/L; keeping the range of efficiently removed phosphorus in 1g gypsum being (0.1*CP) mg to (0.9*CP) mg; adding hard gypsum powder after lowering the phosphorus removing effect in the mixed mineral so as to keep the range of efficiently removed phosphorus in 1g gypsum being (0.15*CP) mg to (2*CP) mg (CP is the value of the initial phosphorus concentration (mg/L) of the solution). The process of the invention can be applied to removing phosphorus and recycling the phosphorus from phosphorus water such as city domestic sewage, industrial sewage, scattered domestic sewage in village, nutritive lake, big, middle and small nutritive landscape water, and the like.
本发明提供了一种用天然矿物在富磷水体或污水中除磷及回收磷的定量工艺方法。其分别称取结晶灰岩和硬石膏粉末,粒径在150~800目,按4∶1~14∶1的质量比混合,在初始磷浓度为1000mg/L~2mg/L的溶液中,在温度为15℃~30℃,反应时间为1~12小时的条件下,混合矿物中每1g石膏对应的有效除磷量的范围在(0.1*CP)mg~(0.9*CP)mg;在混合矿物去除磷效果较低后,加入硬石膏矿物粉末,这时,每1g石膏对应的有效除磷量在(0.15*CP)mg~(2*CP)mg之间(CP为溶液的初始磷浓度(mg/L)的数值)。该工艺能够应用于城市生活污水、工业废水、农村分散式生活污水,富营养化湖泊水体及大、中、小型的富营养化景观水体等富磷水体的除磷及回收磷。

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    CN-102276039-ADecember 14, 2011桂林理工大学天然矿物混合物对富磷水体除磷的方法