对虾大棚养殖废水悬浮物静沉降效果初步研究

A Preliminary Study of the Static Settling Effection on Suspended Solids of Prawn Greenhouse Aquiculture Waste Water

为探究对虾大棚养殖废水中悬浮物的性质和静沉降规律,采用大棚养殖废水中的悬浮物进行静沉降实验,表明虾塘废水的悬浮物一般小于200 mg/L,且粒径主要集中在11~150μm之间。在2 h左右静沉降后,悬浮物浓度能降低39%~46%;悬浮物的沉降速率随着沉降时间的增加而降低。前10 min,沉降速率在0.20 cm/s以上,且浓度越大,速率越大,随后逐渐减少。悬浮物是评估水产养殖废水达标排放的重要指标之一。本次试验获得了对虾废水废水悬浮物的基本特性以及静水沉降的一般规律,为今后优化对虾养殖废水的达标处理技术提供了参考依据,从而助推浙江省"五水共治"工程。

To explore properties and hydrostatic settling rule of the suspended solids in prawn greenhouse aquiculture waste water,the static sedimentation experiment of suspended solids has been accomplished.The result showed that concentration of suspended solids of waste water was generally less than 200 mg/L,but also particle size were mainly concentrated in 11-150 microns.After 2 h static settling,concentration of suspended solids could reduce 39%-46%; sedimentation rate of suspension reduced as settling time extended.Sedimentation rate was above 0.20 cm/s during the first 10 minutes.the greater the concentration,the more fast the rate.Then the rate would reduce gradually.suspended solids is one of the important indicators in waste water evaluation.This experiment achieved that the fundamental characteristics of suspended solids and general rule of hydrostatic settling of shrimp suspended solids.For future,it could provide a scientific reference for technology development on waste water treatment.