Effect of amended filler fold-flow bioretention system on nitrogen and phosphorus reduction in rainwater
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摘要:
针对生物滞留池对雨水中氮、磷去除效果不稳定，甚至出现负去除现象，开展改良生物滞留系统的研究。通过构建直流式和折流式2种生物滞留系统，分别填充传统填料和羟基铝蛭石污泥颗粒（HAVSP）改良填料，搭建传统填料直流式生物滞留柱（1#）、改良填料直流式生物滞留柱（2#）、改良填料折流式生物滞留柱（3#）3个模拟试验柱；比较了3个模拟试验柱对雨水中氮、磷的去除效果，并探讨了HAVSP对生物滞留填料的改良作用。结果表明：HAVSP改良填料折流式生物滞留系统对氮、磷的削减效果比传统填料和改良填料直流式生物滞留系统更加明显，且在350 mm淹没出流高度时对氮、磷削减效果最佳，总氮和硝态氮去除率最高可达76%和77%。
Abstract:The study on the amended bioretention systems was conducted in view of the instability and even the negative removal of N, P in rainwater by the bioretention tanks. By constructing two systems of straight-flow and fold-flow bioretention, traditional fillers and hydroxy-aluminium vermiculite sludge particle (HAVSP) were filled respectively. Three simulation test device columns were set up, of which 1# was a traditional filling straight-flow bioretention column, 2# was a modified filling straight-flow bioretention column, and 3# was a modified filling fold-flow bioretention column. The removal effect of nitrogen and phosphorus in rainwater under three simulated experimental devices was compared, and the improvement effect of HAVSP on bioretention filler was discussed. The results showed that the reduction effect of nitrogen and phosphorus in HAVSP amended filler fold-flow bioretention system was more obvious than that in conventional filler and amended filler straight-flow bioretention system, and had the best effect on nitrogen and phosphorus reduction when the outflow height was 350 mm, with total nitrogen and nitrate-nitrogen removal rates up to 76% and 77%, respectively.
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Key words:
- bioretention system /
- amended filler /
- straight-flow /
- fold-flow /
- nitrogen removal /
- phosphorus removal
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图 1 生物滞留试验柱剖面
注：图中数字为试验柱尺寸，mm。
Figure 1. Profile of the biological retention test column
图 2 1#和2#柱出水不同形态氮与总磷浓度及去除率
Figure 2. Concentrations and removal rates of different forms of nitrogen and total phosphorus of 1# and 2# test column effluent
图 3 3#柱不同淹没出流高度出水各形态氮与总磷浓度及去除率
Figure 3. Concentrations and removal rates of different forms of nitrogen and total phosphorus in effluent at different submerged outflow heights of 3# test column
表 1 各生物滞留试验柱内的填充物
Table 1. Materials filled in bioretention test columns
填充物 高度/
mm1#柱 2#柱、3#柱 覆盖层 70 树皮和有机质 树皮和有机质 种植土壤层 250 校园绿化带土壤 校园绿化带土壤 上层填料层 450 沙子 石英砂 下层填料层 200 沙子 90%沙+5%木屑+5%HAVSP 砂滤层 90 粗砂（直径1~2 cm） 粗砂（直径1~2 cm） 砾石排水层 100 砾石（直径12~35 mm）+DN25穿孔管 砾石（直径12~35 mm）+DN25穿孔管 
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表 2 模拟雨水的污染物来源及浓度
Table 2. Sources and concentrations of pollutants in simulated rainwater
mg/L 进水浓度 水质指标 总氮 氨氮 硝态氮 总磷 低浓度（1~3场） 4 1 1 1 中浓度（4~6场） 8 2 2 2 高浓度（7~9场） 16 4 4 4
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表 3 HAVSP主要元素组成
Table 3. Main element composition of HAVSP
元素 质量占比/% 质量占比偏差/% 原子占比/% 元素 质量占比/% 质量占比偏差/% 原子占比/% Fe 6.12 0.14 1.75 P 0.07 0.03 0.03 Al 8.21 0.08 4.86 N 0.00 0.52 0.00 Si 10.42 0.09 5.93 C 41.32 0.32 54.96 Ca 0.08 0.03 0.03 O 31.50 0.24 31.46
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[1] AWUAL M R. Efficient phosphate removal from water for controlling eutrophication using novel composite adsorbent[J]. Journal of Cleaner Production,2019,228:1311-1319. doi: 10.1016/j.jclepro.2019.04.325 [2] JIA H F, WANG Z, ZHEN X Y, et al. China's sponge city construction: a discussion on technical approaches[J]. Frontiers of Environmental Science & Engineering,2017,11(4):1-11. [3] 冉阳, 付峥嵘, 马满英, 等.改良型生物滞留池在海绵城市雨水处理中的研究与应用[J]. 环境工程技术学报,2021,11(1):173-180. doi: 10.12153/j.issn.1674-991X.20200094RAN Y, FU Z R, MA M Y, et al. Research and application of amended bioretention tank in rainwater treatment of sponge city[J]. Journal of Environmental Engineering Technology,2021,11(1):173-180. doi: 10.12153/j.issn.1674-991X.20200094 [4] ASHOORI N, TEIXIDO M, SPAHR S, et al. Evaluation of pilot-scale biochar-amended woodchip bioreactors to remove nitrate, metals, and trace organic contaminants from urban stormwater runoff[J]. Water Research,2019,154:1-11. doi: 10.1016/j.watres.2019.01.040 [5] XIONG J Q, REN S H, HE Y F, et al. Bioretention cell incorporating Fe-biochar and saturated zones for enhanced stormwater runoff treatment[J]. Chemosphere,2019,237:124424. doi: 10.1016/j.chemosphere.2019.124424 [6] YOU Z Y, ZHANG L, PAN S Y, et al. Performance evaluation of modified bioretention systems with alkaline solid wastes for enhanced nutrient removal from stormwater runoff[J]. Water Research,2019,161:61-73. doi: 10.1016/j.watres.2019.05.105 [7] 高晓丽. 道路雨水生物滞留系统内填料的研究[D]. 太原: 太原理工大学, 2014. [8] 王子为, 钱昶, 张成波, 等.伊逊河流域总磷污染来源解析[J]. 环境科学研究,2020,33(10):2290-2297.WANG Z W, QIAN C, ZHANG C B, et al. Source apportionment of total phosphorus pollution in Yixun River Basin[J]. Research of Environmental Sciences,2020,33(10):2290-2297. [9] KIM H, SEAGREN E A, DAVIS A P. Engineered bioretention for removal of nitrate from stormwater runoff[J]. Water Environment Research,2003,75(4):355-367. doi: 10.2175/106143003X141169 [10] 刘赫尊, 陈亮, 张海丰, 等.改性海绵铁深度除磷及其再生磷回收方法[J]. 环境科学学报,2020,40(1):147-154.LIU H Z, CHEN L, ZHANG H F, et al. Phosphorus removal and recovery based on modified sponge iron[J]. Acta Scientiae Circumstantiae,2020,40(1):147-154. [11] 范军辉, 郝瑞霞, 李萌, 等.基于反硝化脱氮的硫铁复合填料除磷机制[J]. 环境科学,2016,37(11):4275-4281.FAN J H, HAO R X, LI M, et al. Phosphorus removal mechanism of sulfur/sponge iron composite fillers based on denitrification[J]. Environmental Science,2016,37(11):4275-4281. [12] 王亚东, 王少坡, 郑莎莎, 等.生物除磷系统的聚磷微生物种群及其检测方法[J]. 环境工程,2015,33(2):21-26.WANG Y D, WANG S P, ZHENG S S, et al. Poly-p accumulating microorganisms and identifying methods for biological phosphorus removal system[J]. Environmental Engineering,2015,33(2):21-26. [13] 唐朝春, 刘名, 陈惠民, 等.吸附除磷技术的研究进展[J]. 水处理技术,2014,40(9):1-7.TANG C C, LIU M, CHEN H M, et al. Research progress of phosphorus removal from wastewater by adsorption technology[J]. Technology of Water Treatment,2014,40(9):1-7. [14] LI J H, LV G H, BAI W B, et al. Modification and use of biochar from wheat straw (Triticum aestivum L.) for nitrate and phosphate removal from water[J]. Desalination and Water Treatment,2016,57(10):4681-4693. [15] LIU J Y, DAVIS A P. Phosphorus speciation and treatment using enhanced phosphorus removal bioretention[J]. Environmental Science & Technology,2014,48(1):607-614. [16] ZHANG W, SANG M, SUN H C, et al. Influence of rainfall on the performance of bioretention systems modified with activated carbon and biochar[J]. Journal of Hydro-Environment Research,2021,38:63-71. doi: 10.1016/j.jher.2021.06.001 [17] 潘伟亮, 罗玲利, 王书敏, 等.改良填料生物滞留系统除污效果的季节变化[J]. 环境工程学报,2021,15(5):1763-1772. doi: 10.12030/j.cjee.202010060PAN W L, LUO L L, WANG S M, et al. Seasonal changes in the decontamination effect of the biological retention system with improved filler[J]. Chinese Journal of Environmental Engineering,2021,15(5):1763-1772. doi: 10.12030/j.cjee.202010060 [18] 王前朋, 陈韬, 裘娜. 碳源种类及其添加量对生物滞留性能的影响研究[J]. 应用化工[2021-07-31]. https: //doi. org/10.16581/j. cnki. issn1671-3206.20210531.002 [19] LIN J W, ZHAO Y Y, ZHAN Y H, et al. Influence of coexisting calcium and magnesium ions on phosphate adsorption onto Hydrous iron oxide[J]. Environmental Science and Pollution Research,2020,27(10):11303-11319. doi: 10.1007/s11356-020-07676-w [20] 仇付国, 卢超, 代一帆, 等.改良雨水生物滞留系统除污效果及基质中磷的形态分布研究[J]. 给水排水,2017,53(3):48-54. doi: 10.3969/j.issn.1002-8471.2017.03.010 [21] YAN Q, DAVIS A P, JAMES B R. Enhanced organic phosphorus sorption from urban stormwater using modified bioretention media: batch studies[J]. Journal of Environmental Engineering,2016,142(4):04016001. doi: 10.1061/(ASCE)EE.1943-7870.0001073 [22] 黄勇强, 赵文亮, 李武举.一种廊道式生物滞留池径流污染控制效果研究[J]. 复旦学报(自然科学版),2020,59(6):761-768.HUANG Y Q, ZHAO W L, LI W J. Study on control effect of runoff pollution in corridor bioretention[J]. Journal of Fudan University (Natural Science),2020,59(6):761-768. [23] 王建军, 李田, 张颖.给水厂污泥改良生物滞留填料除磷效果的研究[J]. 环境科学,2014,35(12):4642-4647.WANG J J, LI T, ZHANG Y. Water treatment residual as a bioretention media amendment for phosphorus removal[J]. Environmental Science,2014,35(12):4642-4647. ⊗ -
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