Application of micro-flocculation and sand filtration as advanced wastewater treatment technique

作者：Li, Yi^*; Wang, Qing; Wu, Yue; Li, Wei; Liu, Zhigang

来源：Desalination and Water Treatment, 2014, 52(7-9): 1299-1306.

DOI：10.1080/19443994.2013.787029

• Micro-flocculation
• Sand filtration
• Advanced wastewater treatment
• Microbial community
• EDCs

To meet the strict wastewater discharge standard enacted from 2008 in China, a micro-flocculation and sand filtration process was developed and investigated as advanced wastewater treatment in a wastewater treatment plant. The average removal ratios of total phosphorus, suspended solids, and chemical oxygen demand (COD) from secondary effluents were 53.3, 58.8, and 31.1%, respectively. What's more, most of the endocrine disrupting compounds (EDCs) were removed during the process with an endocrine activity decreased from 76.59ng/L to below the limit of quantification. Polymerase chain reaction-denaturing gradient gel electrophoresis shows that microbes existing in the sands could enhance the removal of COD and EDCs through biological degradation. This was also proved by fluorescence excitation-emission matrix spectroscopy study on wastewater before and after the micro-flocculation and sand filtration process. It is concluded that pollutants were removed through coagulation, adsorption, filtration, and biological ways during the process.

• 出版日期2014-2-23
• 单位河海大学