摘要
设计制作了"双层底"、带有净化槽的循环水海参养殖系统,研究了不同换水方式下该系统除氨氮的效果,为海参自净式工厂化养殖模式的建立提供依据。结果表明,在加入硝化细菌后,高密度、短周期换水养殖其硝化系统建立比低密度、长期不换水时快。短周期换水养殖在硝化系统稳定后,氨氮与实验初始和峰值相比分别减少63.9%和75.3%,每个水循环平均除氨率为14.2%;长周期换水养殖在硝化系统稳定后,氨氮与初始和峰值时相比分别减少35.9%和86.8%,每个循环平均除氨率为13.6%。2种养殖方式中,氨氮和亚硝酸盐最终均能保持在安全范围内,海参的成活率分别为100%与95%。
A self-cleaning aquaculture system with filtering equipment was designed for sea cucumber culture based on the practical process to improve the traditional indoor production model,in which the water quality was controlled through water exchanging,but leading to high energy consuming and environmental pollution.In this work,two related experiments were carried out to evaluate the efficiency of ammonium nitrogen removal.In the first experiment,a maximum value of ammonium nitrogen(0.227 mg/L) and nitrite nitrogen(0.139 mg/ L) appeared at 3 and 9 days after adding nitrifying bacteria into the filtering box,then reduced and kept at 0.056±0.015 mg/L and 0.031±0.015 mg/ L,respectively.Ammonium nitrogen was 63.9% and 75.3%less than that of beginning and peak,the average removal rate was 14.2%by every cycle.A maximum value of ammonium nitrogen(0.190 mg/ L),nitrite nitrogen(0.077 mg/L) and nitrate nitrogen (0.532 mg/L) appeared at 6,12 and 19 days after adding nitrifying bacteria into the filtering box,then reduced and kept at 0.025±0.005 mg/L,0-0.007 mg/ L,and 0.292±0.02 mg/L,respectively.Ammonium nitrogen was 35.9%and 86.8%less than that of beginning and peak,the average removal rate was 13.6%by every cycle.The survival rate of sea cucumbers was 100%and 95%in each experiment.
出处
《齐鲁渔业》
2010年第10期1-3,共3页
Shandong Fisheries
基金
大连市青年科技人才基金项目:2007J23JH023
国家海洋局海洋公益项目:200805032
关键词
海参
循环水养殖
自净化
氨氮
sea cucumber
recirculating aquaculture
self-cleaning aquaculture system
ammonium nitrogen
