A new constructed wetland design for nitrogen recovery of industrial composting leachates through bioconversion into a nitrate-rich hydroponic fertilizer

IF 6.7 2区工程技术 Q1 ENGINEERING, CHEMICAL Journal of water process engineering Pub Date : 2025-03-18 DOI:10.1016/j.jwpe.2025.107491

Rémi Soret , Paul-Etienne Fontaine

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Abstract

Nitrogen can be recovered from highly ammonium-concentrated wastes like composting leachates through nitrification into a nitrate-enriched fertilizer. Two Verticalized SubSurface Flow constructed Wetland (VSSFW) designs presenting 2 m (VSSFW 2 m) and 4 m (VSSFW 4 m) long packing-beds were compared for the bioconversion of industrial composting leachates. During a monitored treatment cycle of 96 h, the VSSFW 2 m displayed higher nitrification efficiency (Removal Efficiency RE (%) = 99.9 %) and higher nitrate NO₃-N production (212 mg.L⁻¹ final NO₃-N concentration, Conversion Ratio (CR) = 1.35, Converted Mass Load (CML) = 74.8 g _NO3-N.m⁻³_packing.d⁻¹) than the VSSFW 4 m (RE (%) = 81.6 %, 125 mg.L⁻¹, CR = 0.78, CML = 46.2 g _NO3-N.m⁻³_packing.d⁻¹). The nitrate-enriched solution produced by the VSSFW 2 m held comparable NO₃-N concentration as the inorganic Hoagland fertilizer (210 mg.L⁻¹). It demonstrated both the feasibility of the bioconvertion and the agronomical qualities of the obtained solution. On a 44 days steady-state operation, the VSSFW 2 m displayed better nitrification (RE (%) = 96.9 ± 3.9 %, Surface Loading Rate (SLR) = 22.9 ± 2.9 g _NH4-N.m⁻² _footprint.d⁻¹) than the VSSFW 4 m (RE (%) = 81.5 ± 12.9 %, SLR = 14.7 ± 2.8 g _NH4-N.m⁻² _footprint.d⁻¹). It also demonstrated significantly higher NO₃-N production (211.6 ± 14.9 mg.L⁻¹ final NO₃-N concentration, CR = 1.35 ± 0.19 and CML = 78.4 ± 5.5 g _NO3-N.m⁻³_packing.d⁻¹) than the VSSFW 4 m (211.6 ± 14.9 mg.L⁻¹ final NO₃-N concentration, CR = 1.35 ± 0.19 and CML = 78.4 ± 5.5 g _NO3-N.m⁻³_packing.d⁻¹). Only the VSSFW 2 m was able to produce in steady-state operation a bioconverted fertilizer from composting leachates holding comparable agronomical values than the inorganic Hoagland fertilizer.

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一种新型人工湿地设计，用于工业堆肥渗滤液的氮回收，通过生物转化为富硝酸盐的水培肥料

氮可以从高氨浓度的废物中回收，如堆肥渗滤液，通过硝化作用转化为硝酸盐富集肥料。比较了两种垂直潜流人工湿地（VSSFW）设计，即2米（VSSFW 2米）和4米（VSSFW 4米）长的填料床，用于工业堆肥渗滤液的生物转化。在96 h的监测处理周期中，VSSFW 2 m具有较高的硝化效率（去除率RE(%) = 99.9%）和硝酸盐NO3-N产量（212 mg）。L−1最终NO3-N浓度，转化率（CR) = 1.35，转换质量负荷(CML) = 74.8 g NO3-N.m−3packing.d−1）大于VSSFW 4 m （RE (%) = 81.6%, 125 mg）。L−1,CR = 0.78, CML = 46.2 g NO3-N.m−3 packing.d−1)。VSSFW 2 m产生的富硝酸盐溶液的NO3-N浓度与无机Hoagland肥料（210 mg.L−1）相当。它证明了生物转化的可行性和所得溶液的农艺品质。在44天的稳态运行中，VSSFW 2 m的硝化效果较好(RE（%) = 96.9±3.9%，表面负载率(SLR) = 22.9±2.9 g NH4-N）。m−2 footprint.d−1)比VSSFW 4 m (RE(%) = 81.5±12.9%,单反= 14.7±2.8 g NH4-N。m−2 footprint.d−1)。NO3-N产量显著提高（211.6±14.9 mg）。L−1 NO3-N终浓度CR = 1.35±0.19,CML = 78.4±5.5 g NO3-N.m−3packing.d−1)比VSSFW 4 m（211.6±14.9 mg）高。L−1 NO3-N终浓度，CR = 1.35±0.19,CML = 78.4±5.5 g NO3-N.m−3packing.d−1)。只有VSSFW 2 m能够在稳态运行中从堆肥渗滤液中生产出生物转化肥料，其农学价值与无机Hoagland肥料相当。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies