阶梯湿地基质不同粒径对净化农业生活废水的影响  

Effects of Different Particle Sizes of Stepped Wetland Matrix on The Purification of Agricultural Domestic Wastewater

作　　者：裴亮[1,2,3,4] 肖靖安 马凌 孙莉英 王春辉[1,2] 王理明 PEI Liang;XIAO Jingan;MA Ling;SUN Liying;WANG Chunhui;WANG Liming(Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;No.4 Branch Company of China Petroleum Pipeline Engineering Co.Ltd.,Langfang 065000,China;Xi'an Polytechnic University,Xi'an 710000,China)

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]中国科学院大学,北京100049 [3]中国石油管道局工程有限公司第四分公司,河北廊坊065000 [4]西安工程大学,陕西西安710000

出　　处：《水处理技术》2022年第2期114-118,共5页Technology of Water Treatment

基　　金：国家重点研发计划项目(2017YFC050540503);国家自然科学基金(51109197,4197071197);中国科学院西部行动计划项目(KZCX2-XB2-13)。

摘　　要：湿地各参数对农业生活废水净化效果都有明显影响。研究采用阶梯湿地技术对农业生活废水进行净化,将四种不同粒径土壤(粒径A<10μm、10μm<粒径B≤100μm、100μm<粒径C≤2000μm和粒径D>2000μm)作为基质设置于湿地系统,研究在它们各自情况下湿地系统净化农业生活废水中主要污染物的能力。实验结果表明:系统中废水停留时间(HRT)为7天时,对废水中TN、NH_(3)-N、TP、浊度和COD的净化率为:粒径A为基质时,净化率分别为68.3%、79.4%、69.7%、73.9%和82.2%;粒径B为基质时,净化率分别为71.3%、86.5%、73.8%、84.2%和87.9%;粒径C为基质时,净化率分别为62.4%、71.6%、59.3%、84.5%和87.9%;粒径D为基质时,净化率分别为57.3%、68.3%、55.3%、72.1%和63.9%。其中粒径B净化效果最好,出水水质基本达到农田灌溉水质标准,净化后出水可以直接用于大田灌溉。Wetland parameters can obviously affect the agricultural domestic wastewater purification effect.This study adopts the stepped wetland wastewater purification technology for agricultural domestic wastewater.Four kinds of soils with different particle sizes(A<10μm,10μm<B≤100μm,100μm<C≤2000μm and D>2000μm)were used as substrates and set in wetland system to study the capacity of wetland system to purify major pollutants in agricultural domestic wastewater under different particle sizes.The results showed that when the retention time of wastewater(HRT)in the system was 7 days,the purification rates of TN,NH_(3)-N,TP,turbidity and COD in wastewater were:When particle size A was matrix,the purification rates were 63.3%,71.4%,59.7%,73.9%and 72.2%,respectively.When particle size B was matrix,the purification rates were 71.3%,86.5%,73.8%,84.2%and 87.9%,respectively.When particle size C was matrix,the purification rates were 62.4%,71.6%,59.3%,84.5%and 87.9%,respectively.When particle size D was matrix,the purification rates were 57.3%,68.3%,55.3%,72.1%and 63.9%,respectively.Among them,particle size B has the best purification effect,and the effluent quality basically reaches the standard of farmland irrigation water quality(GB 5084).The purified effluent can be directly used for field irrigation.

关 键 词：农业生活废水 人工湿地 粒径 基质 

分 类 号：X703.1[环境科学与工程—环境工程]