添加生态型植物碳源对人工湿地脱氮除磷效果的研究  

Effect of Adding Ecological Plant Carbon Sources on Nitrogen and Phosphorus Removal in Constructed Wetland

作　　者：张旭[1] 刘佳 许兵[1] 王庆荣 成小翔 ZHANG Xu;LIU Jia;XU Bing;WANG Qingrong;CHENG Xiaoxiang(School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China;Jinan Water Group Co.,Ltd.,Jinan 250118,China;Jinan Quanjian Industrial Corporation,Jinan 250102,China)

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]济南水务集团有限公司,山东济南250118 [3]济南泉建实业总公司,山东济南250102

出　　处：《安全与环境工程》2022年第2期199-204,220,共7页Safety and Environmental Engineering

基　　金：山东省自然科学基金博士基金资助项目(ZR2019BEE058)。

摘　　要：目前多采用直接投放的方式在人工湿地系统中加入植物碳源,但植物碳源在初期会释放过量的有机物,造成系统出水中COD、TN偏高。为解决这一问题,选用经碱处理、热处理和简单处理3种不同方式预处理过的玉米芯植物,通过静态释放试验,探究玉米芯对有机碳、氮、磷的潜在释放能力,并在此基础上利用玉米芯制备生态型植物碳源,作为人工湿地外加碳源处理低碳氮比(C/N)污水,研究其对强化人工湿地脱氮除磷效果的影响。结果表明:玉米芯经过碱处理后,其对COD、TN的释放量分别为104 mg/L、2.58 mg/L,能有效地增加人工湿地的反硝化能力;向低碳氮比(C/N=2)污水的人工湿地系统中投加生态型植物碳源,在人工湿地系统出水中COD不显著提高的前提下,系统出水中TN、TP的去除率分别提高了35.82%和9.70%,Thauera、Dechloromonas等脱氮菌属的相对丰度提高了21.95%,说明利用玉米芯制备的生态型植物碳源可有效提高人工湿地的脱氮除磷效果。At present, direct addition of plant carbon source is mostly used in the constructed wetland system, but the plant carbon source will release excessive organic matter at the initial stage, resulting in the high concentration of COD,TN in effluent water of the system.To solve this problem, this paper selects corncob of alkali treatment, heat treatment and simple treatment to explore C,N,P potential release performance through the static release test.On this basis, we produce the ecological plant carbon sources and add them as external carbon sources to treat low C/N sewage in constructed wetland.The results show that the release amount of COD and TN is 104 mg/L and 2.58 mg/L,respectively, which can effectively increase the denitrification capacity of constructed wetland;by adding ecological plant carbon sources to the low C/N ratio(C/N=2) constructed wetland, under the precondition of increasing the system effluent COD indistinctively, the removal rate of TN and TP in system effluent of constructed wetland is increased by 35.82% and 9.70%,respectively, and the relative abundance of denitrifying bacteria such as Thauera,Dechloromonas increased by 21.95%,which indicates that utilization of corncob as ecological plant carbon sources can improve the denitrification and dephosphorization effect of constructed wetland.

关 键 词：生态型植物碳源 人工湿地 脱氮除磷 玉米芯 

分 类 号：X703[环境科学与工程—环境工程]