Application Of Gracilaria Tenuistipitata Var.liui And Probiotics In Harmless Treatment For Shrimp Effluent

With the development of intensive aquiculture in our country, the effluent pollution question has attracted more attentions. Biological turnplate, bio-contacter, biological filter and mechanical filter are adopted in foreign countries. But those are not fit for our country because of the high cost. Probiotics and large-algae have a very good application prospect in aquaculture effluent treatment. This paper describes the function principles of Photosynthetic Bacteria and bacillus sp. and the application of large-algae in effluent treatment. It also discuses the prospects of the synergic function between probiotics and between probiotics and Gracilaria tenuistipitata Var.liui.1. Study Shrimp Effluent Treatment by Gracilarla tenuistipitata Var.liuiThe optimum density group of Gracilarla tenuistipitata Var.liui in purifying intensive shrimp effluent was studied. The Gracilarla tenuistipitata Var.liui were built 5 density groups for: 10g/L, 20g/L, 25 g/L, 30g/L and 35g/L. Experiment were conducted in lab in 24 hours, on degrading NH4-N,NO2-N,NO3-N,PO4-P.The results showed each group of Gracilarla tenuistipitata Var.liui has effectively degrade of NH4-N and PO4-P(p<0.05). The optimum density group is the 30g/L group, which relatively degradative rate of NH4-N and PO4-P is 69.68% and 92.62% respectively.2. Study Water Treatment by Cooperate with PSB and Bacillus sp.Response surface design was employed to optimize the ratio and dosage of PSB and Bacillus sp. when cooperate with them. Take the ability of degradative CODMn (CODMn=15mg/L) as the standard under a certain condition. The result show that when CODMn=15mg/L,the best dosage of PSB and Bacillus...