Removal of protein extract from moringa oleifera seed presscake on turbidity water / 中国生化药物杂志

ABSTRACT

Objective To study the removal effect of Moringa seedprotein on turbidity water. Methods The protein of Moringaoleifera seed was extracted by salting out and salting out methodand the protein concentration of Moringa oleifera seed wasdetermined by Coomassie blue staining;The removal effect of Moringa seed protein on turbidity water was determined by coagulation test.The contents of COD, ammonia nitrogen and nitrate nitrogen in the water were determined to determine the effect of Moringa seed protein on water quality. Results The experimental results showed that Moringa oleifera seed protein has good removal effect on high and medium turbidity water, and its removal effect is in a dose - dependent manner.The removal rate of 7 mg/L of Moringa seed protein to high and medium turbidity water reached 92.25 ％ and 64.71 ％ respectively. But the removal efficiency of low turbidity water was less than 7 mg/L, the removal rate of low turbidity water was only 31.91％.The results of determination of COD, ammonia nitrogen and nitrate nitrogen showed that the Moringa seed protein did not increase the content of organic matter in the water while removing turbidity effectively. Conclusion Moringa oleifera seed protein has a certain removal effect on turbidity water, among which the removal effect of high and medium turbidity water is strong, and the removal effect of low turbidity water is poor.Moringa oleifera seed protein had little effect on water quality.