光纤pH计的设计

Reclacimation of waste alkali form paper-making wastewater by using physicochemical method

针对传统pH值测试方法的局限性，提出了一种新型pH值测量方案-光纤pH计。着重讨论了传感器的敏感部件原理与制作。并将当今流行的MCS－51系列单片机用于二次仪表设计，提高信息处理速度和精度并利于数显。

Reclaimation of waste alkali from paper-making wastewater by using a pyrite slag-based coagulant And physicochemical method was studied. The result showed that reclamation rate of waste alkali reached 65%,a caustic alkali(17-25g/L) was obtained, and reduction rate of COD was 80%,profit can be obtained from alkali, which was reclaimed from paper-making wastewater ,and can reach 400 yuan/1000 kg, The result indicate that the method can be used in large field.