溶气气浮系统用于去除养鱼水体微型固体颗粒物的试验研究

Experimental Study on Wiping off Micro-Solids from Fishing Water by Using Dissolved Air Floatation System

本文设计了一套溶气气浮分离系统,并对影响净化效果的工艺参数和结构参数进行了初步的研究。试验结果证明,溶气气浮分离系统对养鱼水体的微型固体颗粒有较好的去除效果,并能改变水体的pH值,增加溶氧;气体流量、液体流量、液位高、溶气压力、气浮柱内的释气柱高度对气浮效果都有明显影响。其中最为显著的因子是液位高度。COD和浊度的去除率分别由0.6米时的16.13%、28.15%增加到1.2米时的54.47%、71.48%。通过调控参数因子,浊度去除率可达71.48%,COD的去除率为54.47%。

A system of dissolved air floatation is designed, and the parameters of techniques and structnre which affect on the efficiency of pnrification are elementary studied in this paper. The testing resuhs indicate that the micro-solids can be separated efficiently from fishing water, the pH value can be influenced, and the dissolved oxide can be increased simuhaneously by using this foam fractionation system. The efficiency of separation may be influenced by gas flux, liquid flux, height of liquid, dissolved gas pressure and the height of the little cohnnniation in he system, specially the height of liquid. The wiping rates of COD and Tud increase to 54.47percent, 71.48percent/1.2meters from 16.13percent,28.15percent/0.6meters,separately. By justifying and controlling the parameter faetors, wiping rate of Tud can reach 71.48 percent and COD 54.47 percent.