江蓠与有益菌协同净化模拟养殖废水效果的研究

The synergetic effect of Gracilaria tenuistipitata and probiotics on simulated aquaculture wastewater purification

通过室内实验研究了细基江蓠繁枝变种(Gracilaria tenuistipitata Var.liui)与有益菌(光合细菌、芽孢杆菌和乳酸杆菌)净化养殖废水的效果。本实验设置了对照、江蓠、光合细菌+江蓠、乳酸杆菌+江蓠、芽孢杆菌+江蓠5个实验组,跟踪各组在120 h内对养殖废水的净化效果。结果显示,江蓠与有益菌协同净化养殖废水效果明显,各处理组NH+4-N、NO-2-N、NO-3-N、无机氮、PO3-4-P及COD Mn的去除效果均显著优于对照组(P<0.05)。对硝酸氮去除有较好效果的是光合细菌+江蓠、乳酸杆菌+江蓠和芽孢杆菌+江蓠组,在48 h均达到90%以上;对亚硝氮去除效果最好的是光合细菌+江蓠组,在120 h去除率达到94%;对氨氮去除效果最好的是乳酸杆菌+江蓠组,在120 h去除率达57.72%;而对磷酸盐和COD Mn的去除效果各处理组差异不显著(P>0.05),在72 h的去除率均达80%以上。本研究可为工厂化对虾养殖废水处理方案设计提供参考。

The synergetic effect of Gracilaria tenuistipitata Vat. liui and probiotics on simulated aquaculture wastewater purification was studied in laboratory. One control group and four treatment groups including Gracilaria, photosynthetic bacteria ＋ Gracilaria, Lactobacillus ＋ Gracilaria, Bacillus ＋ Gracilaria were considered. The effect of simulated aqua- culture wastewater purification among 120 h was studied. The results showed that, compared with control group,deg- radation of NH4＋ - N, NO2- - N, NO3- - N, inorganic nitrogen, PO4^3- - P, and CODM, in treatment groups showed significant difference（P 〈0.05 ）. The effect of NO2-- N degradation in the three treatment groups of photosynthetic bacteria ＋ Gracilaria, Lactobacillus ＋ Gracilaria and Bacillus ＋ Gracilaria was good, and degradation rates of NO3- - N were all more than 90% in 48 h. The degradation rate of NO2- - N in photosynthetic bacteria ＋ Gracilaria groups was 94% in 120 h. The degradation rate of NH4＋ - N in Lactobacillus ＋ Gracilaria groups was 57.72% in 120 h. The degradation rates of PO4^3- - P and CODMn were more than 80% in 72 h, and showed no significant difference between treatmeat groups （P 〉 0.05 ）. This study can provide a scientific reference for designing industrialized shrimp aquaculture wastewater treatment program. [ Chinese Fishery Quality and Standards, 2014, 4（ 1 ） ：33 -37 ]