Effects of De-icing Salts on the Respiration of the Microorganisms of Activated Sludge

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• 作者：Monika Vítězová ; Tomáš Vítěz ; Nuttakan Nitayapat
• 关键词：Road salts ; De ; icing ; Activated sludge ; Respiration activity ; Wastewater treatment ; Acclimation period
• 刊名：Water, Air, and Soil Pollution
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：227
• 期：11
• 全文大小：576 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Terrestrial Pollution
  Hydrogeology
  
• 出版者：Springer Netherlands
• ISSN：1573-2932
• 卷排序：227

文摘

Winter road maintenance is particularly ensured using the application of chemicals on roads. Especially in urbanised areas, the solution of water with de-icing salts is discharged into sewer system transporting this water to wastewater treatment plant, where it can cause lot of problems. Beside the corrosive effects of salt on the materials used for sewer system and technological equipment of wastewater treatment plant, salt concentration affects the efficiency of biological wastewater treatment. The analyses performed with activated sludge from wastewater treatment plant showed that commonly used de-icing salts (NaCl, MgCl₂, CaCl₂) profoundly affected the respiratory activity of its microorganisms. Increasing concentrations of chloride in the influent of the wastewater treatment plant caused a progressive decrease in respiratory activity and a progressive prolongation of the acclimation period of the microbial community. The extent of the increase in the acclimation period was dependent on the examined road salt.