冷轧乳化废水生物破乳

Microbe demulsification of cold rolling emulsion wastewater

利用分离的热带假丝酵母JM-1的培养液作破乳剂对冷轧乳化废水进行了生物破乳研究.该培养液在常温下8 h可使乳化废水的破乳率达97.1%,与化学破乳剂SYM+PAC 93.1%的破乳率相比具有更强的破乳活性,且受废水的pH值和温度影响很小.通过对全培养液、离心上清液、菌体和空白培养基的破乳效果对比表明,代谢过程中产生的生物表面活性剂是生物破乳的主要活性成分.热带假丝酵母JM-1菌株发酵液用于冷轧乳化废水破乳具有破乳率高、浮渣少及不产生二次污染等优点,可作为冷轧乳化废水的生物破乳剂.

The culture medium of Candida tropicalis sp. JM-1 isolated from wastewater was used as a demulsifier treating emulsion wastewater from a cold rolling plant. The emulsion wastewater was biodemulsified by 97.1% in 8 h at room temperature. The capability of the biodemulsifier was stronger than the chemical demulsifier SYM ＋ PAC, and the biodemulsification process was less affected by the pH and temperature of wastewater. The biodemulsification capability mainly resulted from the biosurfactant produced by JM-1. The advantages of the biodemulsification are high demulsification rate, little sludge source, and without secondary pollution.