乳品废水处理中水解酸化池浮渣资源化

The Research of Resources Reuse of Scum in Milk Wastewater in Hydrolytic Acidification Tank

目的为对乳品废水浮渣主要成分进行分析,对脂肪酸的提取工艺进行优化,提出浮渣资源化的技术路线,并对该路线进行可行性分析.方法采用酸水解提取脂肪酸,确定脂肪酸提取的工艺参数,同时获的各种产品.结果浮渣中脂肪酸提取的最佳工艺参数为盐酸质量分数为12%,酸用量3 mL/g,温度50℃,水解时间60 min.乙醚-石油醚(1:1)用量20 mL/g.混合脂肪酸的提取率为54.3%,酸值以KOH表示为215 mg/g.结论乳品废水浮渣资源化利用,极大地降低污染物对生态环境的危害,有利于环境质量的提高和生态环境的好转,具有较高的环境效益和生态效益.

Scum produced in the hydrolysis- acidification tank of the milk wastewater treatment process is considered to be resources based on the theory of circulating economy. Scum reuse technology method was determined through analyzing the composition of the scum and the optimal extraction method of fatty acid from scum. Suitable technical parameters of this method are the following： The application amount of acid is 3 ml/g and the HCl mass fraction is 12 %. Reaction temperature is 50 ℃. Reaction time is 60min. Reaction amount of mixed aether and petroleum （1 ： 1） is 20 mL/g. Extraction efficiency and acid number are 54.3 % and 215 mgKOH/g respectively. The main reuse products from scum are fatty acid, feedstuff, and fertilizer. This idea, especially corresponding method created great ecological and economic benefit.