| 刘杰,方宏达,李剑捷,刘婉欣,何俊铭,林佳慧,蓝伟斌,郭沛涌.异位生态组合修复技术对九龙江支流水体不同形态氮的去除效应[J].农业环境科学学报,2023,42(8):1790-1802. |
| 异位生态组合修复技术对九龙江支流水体不同形态氮的去除效应 |
| The removal effect of ex-situ combined ecological remediation technology on different forms of nitrogen in Jiulong River tributary |
| 投稿时间：2022-09-18 修订日期：2023-03-08 |
| DOI：10.11654/jaes.2022-0921 |
| 中文关键词: 异位生态组合修复技术 不同形态氮 去除效应 环境因子 |
| 英文关键词: ex-situ ecological combined remediation technology different forms of nitrogen removal effect environmental factors |
| 基金项目:国家自然科学基金项目（20777021）；福建省自然科学基金项目（2017J01018）；厦门市高校科研院所产学研项目（3502Z20193051） |
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| 摘要点击次数: 1998 |
| 全文下载次数: 1877 |
| 中文摘要: |
| 为探讨异位生态修复技术对水体不同形态氮的去除效应及去除机理，分析异位生态组合修复技术对水体氮形态百分含量影响及不同氮形态与环境因子的相关性，本文以实际工程九龙江支流浦林溪段污染水体异位生态组合修复系统为依托开展研究。结果表明：异位生态组合修复技术对NH4+-N的去除率平均值为88.03%，显著高于对其他形态氮的去除率（P＜0.05），具有最好的去除效应；对水体中总氮（TN）和可溶性总氮（DTN）的去除效应明显，去除率平均值分别为73.35%和77.67%。泥膜共生高效混凝净水系统对NH4+有一定的去除效应，出水NH4+浓度为7.72 mg·L-1。生态塘1对NH4+去除效应最好且具有稳定性，去除率为63.55%，出水NH4+浓度为2.19 mg·L-1。生态塘2处理后NO3--N、NO2--N和NH4+的出水浓度分别降至0.99、0.73 mg·L-1和0.58 mg·L-1。生态塘3对NO3--N的去除效应最好，NO3--N出水浓度为0.64 mg·L-1。在各异位生态修复技术处理单元中，水体氮以可溶性无机氮（DIN）为主要存在形式。泥膜共生高效混凝净水系统、生态塘1、生态塘3中的NH4+在DIN中所占比例最高，分别为62.51%、37.02%、37.88%。生态塘2中NO3--N在DIN中占比最高，为45.23%。各异位生态组合修复处理单元出水不同氮形态与环境因子（溶解氧、温度、pH和浊度）之间表现出不同的相关性。研究表明，异位生态组合修复技术主要通过悬浮污泥滤沉技术、微生物硝化、反硝化作用、沉水植物直接吸收及植物增效作用实现对不同形态氮的去除，其对污染水体修复效果良好。 |
| 英文摘要: |
| The study aims to identify the effects and mechanisms of removing different forms of nitrogen from the water, the influence of exsitu ecological combined remediation technologies on nitrogen concentrations in water, and the correlation between different nitrogen forms and environmental factors. The results discussed in this paper are based on a project involving an ex-situ combined remediation system for contaminated water in Pulin Creek, a tributary of the Jiulong River. The results demonstrated that the average removal rate of NH4+-N by ex-situ ecological combined remediation technology was 88.03%, which was significantly higher than that of other forms of nitrogen(P＜0.05); the removal effect of total nitrogen(TN) and dissolved total nitrogen(DTN)in water is noticeable, with average removal rates of 73.35% and 77.67%, respectively. The NH4+-N removal rate of the sludge-membrane symbiotic high-efficiency coagulation water purification system has a specific removal, and the NH4+-N concentration in the effluent is 7.72 mg·L-1. In Ecological pond 1, the NH4+-N has the best and most stable removal treatment. The NH4+-N removal rate of Ecological pond 1 is 63.55%, and the content of NH4+-N in the effluent is 2.19 mg·L-1. The NO3--N, NO2--N and NH4+-N concentration in the effluent of the Ecological pond 2 are 0.99, 0.73 mg·L-1 and 0.58 mg·L-1, respectively. Ecological pond 3 had the best removal effect for NO3--N, with a content of NO3--N in the effluent of 0.64 mg·L-1. Among all the ex-situ ecological remediation treatment units, the main form of nitrogen in water is dissolved inorganic nitrogen(DIN). The proportion of NH4+-N in DIN is highest in the sludge-membrane symbiotic high-efficiency coagulation water purification system, Ecological pond 1, and Ecological pond 3, at 62.51%, 37.02%, and 37.88%, respectively. In Ecological pond 2, NO3--N accounts for the highest proportion of DIN(45.23%). In various ecological combination remediation treatment units, different forms of nitrogen are associated with environmental factors(DO, temperature, pH, and turbidity). The study discovered that ex-situ ecological combined remediation technology mainly removes different forms of nitrogen through suspended sludge filtration and sedimentation technology, microbial nitrification and denitrification, absorption of submersed macrophytes, and plant synergy and has a good remediation effect on polluted water. |
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