Study on treatment process of D-p-hydroxyphenylglycine wastewater
对羟基苯甘氨酸生产废水的处理工艺研究

D-p-hydroxyphenylglycine wastewater is a high concentration organic wastewater difficult to be treated. In accordance with the technological features of D-p-hydroxyphenylglycine production, this experiment adopts a new route for wastewater classification. Experiment shows that the rate of phenol recovery reaches 95% after physico-chemical treatment of high concentration wastewater ; about six tons of ammonium sulphate is extracted daily. It is feasible to process the low-concentration organic wastewater by means of hydrolysis acidification-biological contact oxidation-precipitation-activated carbon absorption. The total removal rates of COD, BOD5, NH3-N and the volatile phenol are 95.6% , 94.6% , 93.7% , and 99% respectively.