主要研究泥蚶(Tegillarca granosa)与不同浓度的微生态制剂(EM菌)联合净化大棚对虾(Litopenaeus vannamei)养殖废水,旨在构建一套新型高效的综合养殖结构,降低海洋污水的排放.实验在100 L的白色聚乙烯塑料水桶中进行,每桶注入60 L的废水,实验期间不换水,不投放饵料;实验设为5组,每组设置3个重复,养殖7 d,第1组:390μL EM菌+33粒泥蚶;第2组:510μL EM菌+33粒泥蚶;第3组:720μL EM菌+33粒泥蚶;第4组:只投放33粒泥蚶;第5组:空白组.研究结果表明:前4组的净化效果均高于对照组;第2组净化效果最佳,对营养盐的去除率分别为:硝酸盐,68.61％ ±0.25％;磷酸盐,85.34％ ±2.94％;氨氮,72.85％ ±3.62％;总氮,59.24％ ±3.16％;总磷,79.82％ ±2.15％.第1组净化效果次之,第3组和第4组净化效果依次降低.综合以上分析:添加510μL EM菌与33粒泥蚶为最佳配比,其净化废水的能力显著高于其他组,可以为构建新型高效的综合养殖结构提供参考资料.%This article mainly studied the biological purification of greenhouses prawn effluent with the blood clam ( Tegillarca grano-sa) and different levels of effective microorganisms ( EM) , in order to build a new and efficient integrated farming structure, and to re-duce the marine sewage discharge. The blood clams and EM were reared in 100 L white polyethylene plastic barrels added with 60 L prawn pond effluent per barrel. There was no water exchange and no throw in bait during a trial for 7 days. Five groups with three repli-cations each were set up. Group 1-4 had 33 blood clams and 390 μL, 510 μL, 720 μL and 0 μL EM bacteria, respectively. Group 5 used as control with no blood clam and EM bacteria. The results showed that the purification efficiency of group 1-4 was higher than that of the control group. The nutrient removal efficiency of group 2 was the highest, which can remove 68. 61％ ± 0. 25％ of nitrate, 85. 34％ ± 2. 94％ of phosphate, 72. 85％ ± 3. 62％ of ammonia nitrogen, 59. 24％ ± 3. 16％ of total nitrogen and 79. 82％ ± 2. 15％of total phosphorus. Purification effect reduced successively in group 1, 3 and 4. The analysis showed that the 510μL EM bacteria and 33 blood clams were the most suitable proportion, and their ability to purify waste water was significantly higher than that of other groups, which could provide reference for constructing new and efficient integrated breeding structure.
展开▼
