摘要
为实现依据具体污水处理需求定制化选择和配置人工湿地基质,本研究通过收集基质为组间单一变量的人工湿地对照实验文献,整理了砾石、沸石、砖块等18种常用基质对总氮(TN)、总磷(TP)、化学需氧量(COD)、氨氮(NH_(4)^(+))、生化需氧量(BOD)、总悬浮固体(TSS)6类污染物的去除率数据。结果表明:18种常用基质中,仅生物炭和煤矸石不存在明显的污染物去除偏好,陶粒等11种基质对一种污染物存在去除正向偏好或负向偏好,钢渣等5类基质对多种污染物存在偏好性,说明多数常用基质存在污染物去除偏好,根据具体的污染物去除需要选择具有相应正向偏好的基质更有利于净化目标的达成;在此基础上开发了目标导向型人工湿地基质配置模型,该模型可通过输入进水污染物特征和出水标准,输出可达净化目标的基质类型与组合,计算常规情况下的理论去除率,并推荐最佳基质配置。该研究可为人工湿地基质的定制化选择与配置提供理论基础、数据支撑和实现方法。
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,NH_(4)^(+),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.
作者
李晨阳
赵德华
LI Chen-yang;ZHAO De-hua(School of Life Science,Nanjing University,Nanjing 210023,Jiangsu,China)
出处
《湿地科学与管理》
2024年第4期66-71,77,共7页
Wetland Science & Management
基金
遗产地处理水产养殖尾水的鸟类友好型人工湿地技术研发与示范(HHSDKT202310)。
关键词
人工湿地
基质
偏好性
Constructed wetland
Substrate
Preference
