STUDY ON ADVANCED TREATMENT OF PULPING MEDIUM WASTEWATER WITH POTASSIUM FERRATE(Ⅵ)
In this paper, potassium ferrate is used in oxidation of pulping medium wastewater after biochemical treatment. The optimal pH and the best dosage of potassium ferrate are determined. And then a large number of residual Fe3+ is used in flocculation with suitable flocculant. During the experiment, mainly three kinds of flocculants are selected: polyacrylamide (PAM), polyaluminium chloride(PAC) and activated silicic acid(ASI). According to the experiment, the treatment efficiency of PAM is the best. After the wastewater is pretreatment by adding 60 mg/L potassium ferrate at pH=4, pH is adjusted to 8, and 1.5 mL/L PAM(concentration is 1‰) is added for flocculation. After the treatment, the COD is under 60mg/L, and the removal rate of COD reaches 48％, that agrees with the national first-order discharge standard.
potassium ferrate(Ⅵ) advanced treatment pulping medium wastewater
Wang Lele Lan Huixia Liu Xiaofeng
College of Environment and Safe Engineering,Qingdao University of Science and Technology,Qingdao, 266042, China
国际会议
广州
英文
1122-1124
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）