Effect of six modifiers on hydrophilicity of biofilm-substrate and membrane-hanging result in prawn pond

We discussed the correlate parameters of modifiers enhancing the hydrophilicity of the biofilm-substrate and promoting the mature of the membrane, which may provide references for their application in aquaculture wastewater teratmen process. Thesilk net (aperture 0.425 mm) was chosen as the biofilm-substrate andsix modifiers NaOH, Ca(OH)2, HCl, KMnO4, K2Cr2O7, C2H5OH were tested as surface treatment reagents of substrate. Theamount of Bacillus spp. adhered to substrate andthe membrane-hanging effectin aquaculture wastewater treatment provided some key evaluation indice for the six modifiers. The results show that compared with the other treatments, the substrate treated by 10% HCl for 6 h obtained the best hydrophilic ability and better membrane-hanging effect.