Foam separation behaviors of the collagen-peptide based surfactant(CBS) for dye removal from wastewater was studied using crystal violet solution as probe. The influences of p H, gas velocity, mass concentration of CBS, height ratio of foam phase to liquid phase(HF/HL), initial concentration of dye and concentration of ethanol on the removal extent of dye were investigated. The experimental results indicated that CBS exhibited good performance at alkaline condition. It was also found that the removal extent...