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海菜花-螺蛳经济湿地对农田低污染水的净化

储昭升 靳 明 叶碧碧 侯泽英 王海燕 杨 琦

储昭升, 靳 明, 叶碧碧, 侯泽英, 王海燕, 杨 琦. 海菜花-螺蛳经济湿地对农田低污染水的净化[J]. 环境科学研究, 2015, 28(6): 975-980.
引用本文: 储昭升, 靳 明, 叶碧碧, 侯泽英, 王海燕, 杨 琦. 海菜花-螺蛳经济湿地对农田低污染水的净化[J]. 环境科学研究, 2015, 28(6): 975-980.
CHU Zhaosheng, JIN Ming, YE Bibi, HOU Zeying, WANG Haiyan, YANG Qi. Research on Purification of Low-Level Contaminated Water by Ottelia acuminata-Margarya melanioides Constructed Wetland[J]. Research of Environmental Sciences, 2015, 28(6): 975-980.
Citation: CHU Zhaosheng, JIN Ming, YE Bibi, HOU Zeying, WANG Haiyan, YANG Qi. Research on Purification of Low-Level Contaminated Water by Ottelia acuminata-Margarya melanioides Constructed Wetland[J]. Research of Environmental Sciences, 2015, 28(6): 975-980.

海菜花-螺蛳经济湿地对农田低污染水的净化

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07105-002)

Research on Purification of Low-Level Contaminated Water by Ottelia acuminata-Margarya melanioides Constructed Wetland

  • 摘要: 为研究海菜花水培经济湿地对农田低污染水的净化效能及投放螺蛳对水体净化的影响,在进水ρ(TN)、ρ(NO3--N)、ρ(TP)分别为(5.08±0.14)、(4.71±0.15)、(0.10±0.03)mg/L条件下,构建了无螺组(海菜花湿地)、有螺组(海菜花-螺蛳经济湿地)和空白组(无海菜花和螺蛳湿地)3种湿地,对比不同HRT(水力停留时间)对水质处理效果的影响,并考察了其经济效益. 结果表明:①HRT为7 d时,无螺组对TN、NO3--N和TP的去除率分别为55.6%±5.8%、62.6%±5.8%和76.3%±4.8%,有螺组分别为50.8%±5.5%、61.2%±6.3%和75.5%±3.9%;HRT为42 d时的污染物去除率与HRT为28 d时相当,并且有螺组和无螺组也相当,对TN、NO3--N和TP的去除率分别在76.8%、92.4%和84.8%以上. ②HRT为7和42 d时,投放螺蛳对N、P的去除均表现为抑制作用;HRT为7 d时有螺组浊度显著降低(P<0.05). ③HRT为7 d时,有螺组和无螺组对TN、TP的处理量均在800和228 kg/(hm2·a)以上,显著高于HRT为42 d〔141、46 kg/(hm2·a)〕时. ④HRT为7 d的有螺组经济效益最高,为20.3×104元/(hm2·a),其中海菜花收益为15.4×104元/(hm2·a),投加螺蛳增加经济效益为4.9×104元/(hm2·a). 综合考虑对农田低污染水的净化效能和经济效益,优选HRT为7 d的海菜花-螺蛳经济湿地处理农田低污染水.

     

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