( 1. 中南大學 冶金科學與工程學院, 長沙 410083;
2. 水口山有色金屬有限責任公司, 衡陽 421513)
摘 要: 用以城市生活污水廠剩余污泥為主體的生物凈化劑， 探討了石灰中和-生物凈化處理含鈹廢水的新工藝，研究了石灰中和沉降及生物凈化過程。 結(jié)果表明： 中和過程的pH值為8～10， 可將水中的鈹含量降低到100 μg/L左右；鈹?shù)纳飪艋顑?yōu)的pH值為7～10， 溫度為30 ℃左右， 增大生物凈化劑用量有利于鈹?shù)奶幚怼?采用凈化柱連續(xù)實驗， 中和水中鈹濃度可降至5 μg/L， 達到國家排放標準。 凈化柱中每克生物凈化劑能夠處理814.71 μg鈹。
關(guān)鍵字: 含鈹廢水; 石灰中和; 剩余污泥; 生物凈化
PENG Bing1, HE De-wen1, LI Cheng-xing2
（ 1. School of Metallurgy Science and Engineering,
Central South University, Changsha 410083, China;
2. Shuikoushan Nonferrous Metal Co., Ltd, Hengyang 421513, China）
Abstract: Beryllium-containing wastewater was disposed of by biosorption agent made mainly of residual activated sludge from sewerage treatment plants. The novel technique of lime-neutralization and biosorption process was provided for treatment of beryllium-containing wastewater. The effects of processes including lime neutralization, precipitation and biosorption on treatment of this wastewater were studied. The results show that the concentration of beryllium in wastewater can decrease to about 100 μg/L, if pH value of neutralization process was controlled to 8-10. When the optimized conditions of pH value and temperature in biosorption were 7-10 and 30 ℃, respectively, more quantities of biosorption agents can gain better effects. Furthermore, the content of beryllium decreases below the state standard of 5 μg/L during continuous experiments in self-made biosorption reaction equipment. At the same time, disposal capacity of per gram agent for beryllium reaches over 814.71 μg.
Key words: beryllium containing wastewater; lime neutralization; residual activated sludge; biosorption
