Goal-Oriented Selection and Configuration of Base Material for Constructed Wetland
The goal of this study was to achieve customized selection and configuration of base material for constructed wetlands(CWs)based on specific wastewater treatment needs.Data on removal rates of six types of pollutants(TN,TP,COD,NH4+,BOD,TSS)by 18 common base material types(gravel,zeolite,brick,etc.)were compiled by collecting literature on controlled experiments in CWs where base material was a single variable between groups.Results indicated that among the 18 common base material types,only biochar and gangue did not have significant pollutant removal preference.11 base material types,such as ceramsite,had positive or negative preference for removal of one pollutant,and five base material types,such as steel slag,had preference for multiple pollutants.This suggested that most common base materials had pollutant removal preference,and that choosing a base material type with positive preference based on specific pollutant removal needs was more conducive to achieving purification objectives.On this base,a goal-oriented CWs base material selection and configuration model was developed.The model can be used to explore types and combinations of base materials that meet the purification objectives by inputting the characteristics of the pollutants in the effluent and the pollutant treatment objectives of the effluent.By calculating the theoretical removal rate under conventional conditions,optimal base material configuration can be identified.This study provides theoretical foundation,data support and implementation methods for customized selection and configuration of base material in CWs.
NETL
NSTL
万方数据
