净水技术
淨水技術
정수기술
WATER PURIFICATION TECHNOLOGY
2014年
1期
67-71
,共5页
张月平%陈雪初%何圣兵%高如峰%赵晓祥%薛罡
張月平%陳雪初%何聖兵%高如峰%趙曉祥%薛罡
장월평%진설초%하골병%고여봉%조효상%설강
人工湿地%基质%混合%脱氮%小试
人工濕地%基質%混閤%脫氮%小試
인공습지%기질%혼합%탈담%소시
constructed wetland%substrate%mixing%denitification%lab-scale test
基质是人工湿地达成脱氮效果的重要部位,该试验研究了底泥(对照)、底泥砾石复合(砾石)、底泥沸石复合(沸石)3种基质条件下上覆水体中NH +4 N、NO -2 N、NO -3 N和TN的去除效果,以及底泥耦合水体混合(混合)对脱氮效果的影响。结果表明底泥耦合混合时TN和NO -3 N去除率最高,12 d达到85%和91%;单纯底泥条件次之,为69%和73%;底泥沸石复合和底泥砾石复合时对TN和NO -3 N的去除效果较差,为56%和61%。就NH +4 N而言,虽然沸石对NH +4 N有较好的吸附效果,但未能完全将NH +4 N从系统中去除,当水体中NH +4 N浓度较低时还会不断解吸出来。NO -2 N作为中间产物,均先升高后降低,但混合条件下峰值较早出现,且去除速率也较快。
基質是人工濕地達成脫氮效果的重要部位,該試驗研究瞭底泥(對照)、底泥礫石複閤(礫石)、底泥沸石複閤(沸石)3種基質條件下上覆水體中NH +4 N、NO -2 N、NO -3 N和TN的去除效果,以及底泥耦閤水體混閤(混閤)對脫氮效果的影響。結果錶明底泥耦閤混閤時TN和NO -3 N去除率最高,12 d達到85%和91%;單純底泥條件次之,為69%和73%;底泥沸石複閤和底泥礫石複閤時對TN和NO -3 N的去除效果較差,為56%和61%。就NH +4 N而言,雖然沸石對NH +4 N有較好的吸附效果,但未能完全將NH +4 N從繫統中去除,噹水體中NH +4 N濃度較低時還會不斷解吸齣來。NO -2 N作為中間產物,均先升高後降低,但混閤條件下峰值較早齣現,且去除速率也較快。
기질시인공습지체성탈담효과적중요부위,해시험연구료저니(대조)、저니력석복합(력석)、저니비석복합(비석)3충기질조건하상복수체중NH +4 N、NO -2 N、NO -3 N화TN적거제효과,이급저니우합수체혼합(혼합)대탈담효과적영향。결과표명저니우합혼합시TN화NO -3 N거제솔최고,12 d체도85%화91%;단순저니조건차지,위69%화73%;저니비석복합화저니력석복합시대TN화NO -3 N적거제효과교차,위56%화61%。취NH +4 N이언,수연비석대NH +4 N유교호적흡부효과,단미능완전장NH +4 N종계통중거제,당수체중NH +4 N농도교저시환회불단해흡출래。NO -2 N작위중간산물,균선승고후강저,단혼합조건하봉치교조출현,차거제속솔야교쾌。
The matrix is an important part of constructed wetlands for denitrification in this experiment. The removal effect of overlying water on NH +4 N,NO -2 N,NO -3 N and TN under three kinds of substrates such as sediments (contrast),sediment-gravel compound (gravel),sediment-zeolite compound (zeolite),and the effect of water mixing on denitrification. The results show that under the condition of mixed-sediment compound,the removal rates of TN and NO -3 N are higher,after 12 d their values are 85% and 91%, respectively;then under the condition of sediment only,they are 69% and 73%,respectively;under the condition of sediment-zeolite compound or sediment-gravel compound,the removal rate of TN and NO -3 N is low,which are 56% and 61%,respectively. As far as NH +4 N,although the zeolite has good adsorption effect on NH +4 N,it can't be completely removed from system,and it will continue to release when NH +4 N concentration in overlying water is low. As an intermediate product,NO -2 N increases firstly and then decreases,but its peak appears earlier under the condition of mixing,and the removal rate is higher.