Construction waste as a filler of denitrification biofilter for nitrate utilization from wastewater: Characteristics, performance, microbial community and soilless culture

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-09-21 DOI:10.1016/j.biortech.2024.131514

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Abstract

Construction waste (CW) is produced in large quantities, resulting in severe land occupation and resource depletion. This study utilized CW as fillers to construct a denitrification biofilter (DNBF-CW) for treating secondary effluent from wastewater plants. Performance and mechanism were analyzed by water quality, biomass and its distribution, physicochemical characteristics, microbial community structure, extracellular polymeric substances and protein secondary structure analysis. Results indicated that DNBF-CW achieve NO₃⁻-N and chemical oxygen demand (COD) removal efficiencies (RE) of 97 % and 70 %. The β-sheet of DNBF-CW increased from 47 % to 58 %, accompanied by decrease in random curls from 22 % to 0. Post-use CW showed potential as soilless cultivation substrates, boosting germination rates by 42 ± 7 %. Mechanism investigations elucidated that ZX3 improved efficiency by modulating microbial community composition, with Pseudomonas reaching 37 %. This study shows the multiple use of construction waste, which presents a novel, efficient, and eco-friendly solution for water treatment.

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将建筑垃圾作为反硝化生物滤池的填料，以利用废水中的硝酸盐：特性、性能、微生物群落和无土栽培。

建筑垃圾（CW）的大量产生导致了严重的土地占用和资源枯竭。本研究利用建筑垃圾作为填料，构建了反硝化生物滤池（DNBF-CW），用于处理污水厂的二级出水。通过水质、生物量及其分布、理化特征、微生物群落结构、胞外高分子物质和蛋白质二级结构分析，对其性能和机理进行了分析。结果表明，DNBF-CW对NO3--N和化学需氧量（COD）的去除率（RE）分别达到97%和70%。DNBF-CW的β片从47%增加到58%，随机卷曲从22%减少到0。机理研究表明，ZX3 通过调节微生物群落组成提高了效率，其中假单胞菌的比例达到 37%。这项研究表明，建筑垃圾的多重利用为水处理提供了一种新颖、高效和环保的解决方案。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.