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文章摘要
南京建筑废弃泥浆絮凝减容效果与经济性分析
Effect and Economical Analysis of Flocculation Volume Reduction of Construction Waste Slurry in Nanjing
  
DOI:
中文关键词: 废弃泥浆  絮凝排水  减容  经济分析  建筑
英文关键词: Waste slurry  Flocculation drainage  Volume reduction  Economic analysis  Construction
基金项目:国家自然科学面上基金资助项目(52178387);江苏省建设系统科技基金资助项目(2020ZD64)
作者单位
丁嘉仪 河海大学环境学院 
张春雷 河海大学环境学院 
陈森 河海大学环境学院 
李捷 南京环境集团有限公司 
曾文超 南京环境集团有限公司 
王健 南京地铁建设有限责任公司 
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中文摘要:
      以南京市建筑废弃泥浆为研究对象,分别投加聚合氯化铝(PAC)、聚合硫酸铁(PFS)和阳离子聚丙烯酰胺(CPAM)开展絮凝减容试验,分析絮凝剂在不同投加量下泥浆沉降、水质指标及泥浆体积和含水率等的变化。结果表明:上述3种絮凝剂对泥浆均有较好的絮凝沉降效果,调理后泥浆的沉降速度由快变慢直至稳定,尾水水质可达到《污水排入城镇下水道水质标准》(GB 31962—2015)排放标准。CPAM调理的泥浆沉降效果最优,经过20 min的沉降,泥浆可实现减容80%以上,相对于直接将泥浆外运处置的费用,对泥浆絮凝减容后外运可以降低83%的成本。
英文摘要:
      Taking construction waste slurry in Nanjing as the research object, flocculation volume reduction test was carried out by adding poly aluminum chloride (PAC), polymeric ferric sulfate (PFS) and cationic polyacrylamide (CPAM) respectively for analyzing the changes of slurry sedimentation, water quality index, slurry volume and moisture content under different dosage of flocculant. The results demonstrated that the above three flocculants had good flocculation and sedimentation effects on the slurry. The sedimentation speed of slurry changed from fast to low until stable after conditioning. The quality of tailwater met the discharge standard in “Wastewater quality standards for discharge to municipal sewers” (GB 31962—2015). The sedimentation effect of the slurry conditioned by CPAM was the best. After 20 minutes of sedimentation, the slurry reduced its volume by more than 80%. Compared with direct transportation, the cost could be reduced by 83% when the slurry was transported after flocculation and volume reduction.
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