贻贝堵塞管道的防除研究

本文从三方面提供可能应用于解决管道中贻贝堵塞问题的办法:(1)砂滤法:在海水进入水管前用砂将贻贝幼虫滤去,凡颗粒小于40号筛的砂,厚度在3厘米以上,65微米的贻贝卵或幼虫即不能滤过。 (2)用三氧化二砷杀死已附着的贻贝成体,优点是贻贝不能发觉,施毒时间短而毒效大,用浓度400—100 p.p.m.时20分钟至2小时即可杀死。(3)用漂白粉使贻贝的附着足丝溶解而将其从水管中冲出的办法,含有效氯为38.6%的漂白粉1%溶液在10分钟内即可使足丝溶解,胎贝脱落。

STUDIES ON PREVENTION AND EXTERMINATION OF MUSSEL GROWTHS IN PIPELINES

On the basis of experimental results,the following three methods are suggested to prevent the settling of larvae and the killing or removing of adults of fouling mussels in pipelines: 1.Sand filtration.Before water is pumped into the pipelines,it is made to pass through sand layer 3 cm.or more in thickness and consisting of grains between No.40 and No.60 standard sieve in size.It has been proved,that with such thickness and grain size,the sand layer is effective in preventing the entrance of eggs or larvae ...