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作 者:张根源 黄鑫 付英 田西 杨艳亭 温静静 ZHANG Genyuan;HUANG Xin;FU Ying;TIAN Xi;YANG Yanting;WEN Jingjing(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China;Shenhua Engineering Technology Co.,Ltd.,Hefei 230000,China;Shuifa Technology Group Co,Ltd.,Jinan 250100,China;Jiangsu Hehai Environmental Science Research Institute Co.,Ltd.,Nanjing 210024,China)
机构地区:[1]济南大学土木建筑学院,山东济南250022 [2]神华工程技术有限公司,安徽合肥230000 [3]水发技术集团有限公司,山东济南250100 [4]江苏河海环境科学研究院有限公司,江苏南京210024
出 处:《山东科学》2023年第3期135-142,共8页Shandong Science
基 金:山东省企业技术创新项目计划(202150100867);济大-水发技术研究中心项目(W2021009);企业委托项目(W2021125、W2021356)。
摘 要:为保证污染的快速有效处理,基于聚硅铁(PSF)的优异混凝效果及其絮体的快速沉淀性能,以模拟生活污水为试验水样,对短时混凝沉淀工艺(短时工艺)的絮凝和沉淀时间等参数的选择及其对过滤的影响进行研究,对比研究聚硅铁和聚合氯化铝(PAC)在混凝过滤的短时和常规工艺下的去除效果,并利用扫描电镜对其絮体进行分析,最后观察短时工艺对于实际生活污水的处理效果。结果表明,在混凝沉淀试验中,絮凝2 min、沉淀3 min时的PSF短时工艺就能达到与常规工艺较为接近的污染物去除水平。投加量为0.162 mmol/L时,浊度和CODCr平均去除差异率分别为0.59%和11.5%。在过滤试验中,短时PSF工艺的滤后水水质稳定,平均CODCr去除率达到85.53%,比PAC短时工艺高了7.16%。扫描电镜图片表明短时PSF工艺的絮体比PAC絮体结构紧凑,颗粒粒径大,具有更好的絮凝沉淀效果。在处理实际生活污水的试验中,投加量达到0.162 mmol/L时,PSF短时工艺对于浊度和CODCr的去除效果比PAC短时工艺分别高了27.88%和11.11%。In order to ensure the rapid,timely,and effective treatment of water pollution,based on the excellent coagulation effect of poly-Si-Fe(PSF)and the rapid precipitation performance of flocculation,and with simulated domestic sewage as the experimental water sample,we studied the flocculation and precipitation time parameters of the shortened coagulation precipitation process(shortened process)and their impacts on filtration through beaker experiments,compared the removal effects of PSF and polyaluminum chloride(PAC)under the shortened and conventional processes of coagulation filtration,and analyzed the flocs by scanning electron microscopy(SEM).Finally,we observed the treatment effect of the shortened process on actual domestic sewage.The results show that in the coagulation sedimentation experiment,the PSF shortened process with 2 min of flocculation and 3 min of precipitation can reach the pollutant removal level close to that of the conventional process.With a dosage of 0.162 mmol/L,the turbidity and average COD Cr removal rate are 0.59%and 11.5%,respectively.In the actual water treatment experiment,when the dosage reaches 0.162 mmol/L,the removal efficiencies of turbidity and COD Cr by the PSF shortened process are 27.88%and 11.11%higher than that by PAC shortened process respectively.In the filtration experiment,the filtered water quality of the PSF shortened process was stable,and the average COD Cr removal rate reached about 85%,7%higher than the PAC shortened process.The SEM picture shows that the flocculation of PSF in the shortened process has a more compact structure and larger particle size than PAC catkins,thus better flocculation and precipitation effect.
分 类 号:X703[环境科学与工程—环境工程]
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