Treatment of Papermaking Wastewater with PSAF Coagulant
A new type of effective complex coagulant polysilicate aluminum ferric salt(PSAF)was prepared from coal gangue and pyrite slag,and used as coagulant in the treatment of papermaking wastewater.The experimental results showed that PSAF had a good coagulation effect in the treatment of papermaking wastewater when the pH values ranged from 5 to 10.The removal ratio of SS,CODcr and color was 96.5％,88.6％ and 92.3％ respectively,under the conditions that temperature was normal,pH was 7.0 and dosage of the coagulant was 50mg/L.The temperature had little impact on the removal ratio of CODCr.In comparison with the conventional coagulants,such as Al2(SO4)3 and FeCl3,the coagulation performance of PSAF was the best.The remarkable characteristics of this method were higher sedimentation rate,lower remains of pollutants in papermaking wastewater and lower cost of treatment.The coagulation mechanism of PSAF coagulant in the treatment ofpapermaking wastewater was also discussed.
coal gangue pyrite slag coagulant papermaking wastewater coagulation mechanism
SUI ZHIHUI LIU ANJUN ZHAO XIN
School of Light Industry and Textile,Qiqihar University,Qiqihar 161006;China College of Food Enginee College of Food Engineering & Biotechnology,Tianjin University of Science & Technology,Tianjin 30045 School of Light Industry and Textile,Qiqihar University,Qiqihar 161006,China
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
1105-1108
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）