Nutrient removal performance of novel Filamentous Algae Nutrient Scrubber (FANS) configurations

IF 4.5 2区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-03-01 Epub Date: 2025-02-01 DOI:10.1016/j.algal.2025.103937

Harizah B. Hariz , Valerio Montemezzani , Yeri Shim , Denise Rendle , Curtis Picken , Jason B.K. Park , Rupert J. Craggs

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Abstract

Filamentous algae nutrient scrubbers (FANS) can recover nutrients from wastewater, producing harvestable algae biomass that repurposes nutrients and removes them from water. This study evaluates the performance of three FANS modes (standard FANS, shallow suspended FANS, and deep suspended FANS) by comparing biomass productivity, nutrient removal rates, algae photosynthetic efficiency, nutrient composition in algae biomass, and diurnal nitrate concentration reduction. FANS modes differed by algae attachment medium, water depth, algae contact time or hydraulic retention time, and horizontal water velocity. Shallow suspended FANS emerged as the most effective configuration, with highest nitrate reduction efficiency and nutrient recovery rates for nitrogen and phosphorus in algae biomass. Shallow suspended FANS exhibited at least 30 % higher biomass productivity in summer (2.8 ± 1.2 g VS m⁻²·d⁻¹) and 40 % higher productivity in winter (1.4 ± 0.4 g VS m⁻²·d⁻¹) compared to other modes. Nutrient assimilation rates for shallow suspended FANS were at least 10 % higher in summer (0.165 ± 0.072 g N m⁻²·d⁻¹, 0.022 ± 0.010 g P m⁻²·d⁻¹ and 39 % higher in winter (0.085 ± 0.028 g N m⁻²·d⁻¹, 0.013 ± 0.004 g P m⁻²·d⁻¹). These results demonstrate that optimized FANS can enhance algae photosynthetic efficiency, growth, nutrient assimilation, and nutrient recovery year-round.

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新型丝状藻营养物洗涤器（FANS）结构的营养物去除性能

丝状藻类营养洗涤器（FANS）可以从废水中回收营养物质，产生可收获的藻类生物质，重新利用营养物质并将其从水中去除。本研究通过比较生物质生产力、养分去除率、藻类光合效率、藻类生物量中营养成分组成和日硝酸盐浓度降低等指标，对标准、浅悬浮、深悬浮三种FANS模式的性能进行了评价。藻类附着介质、水体深度、藻类接触时间或水力滞留时间、水平面流速等因素影响了FANS的工作模式。浅悬浮FANS是最有效的配置，具有最高的硝酸盐还原效率和藻类生物量中氮和磷的养分回收率。与其他模式相比，浅悬浮FANS在夏季的生物量生产力高出至少30%(2.8±1.2 g VS m−2·d−1)，在冬季的生物量生产力高出40%（1.4±0.4 g VS m−2·d−1）。夏季浅悬浮FANS的养分同化率至少高出10%(0.165±0.072 g N m−2·d−1,0.022±0.010 g P m−2·d−1)，冬季则高出39%（0.085±0.028 g N m−2·d−1,0.013±0.004 g P m−2·d−1）。综上所述，优化后的FANS可以促进藻类的光合效率、生长、养分同化和养分恢复。

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来源期刊

Algal Research-Biomass Biofuels and Bioproducts BIOTECHNOLOGY & APPLIED MICROBIOLOGY-

CiteScore

9.40

自引率

7.80%

发文量

332

期刊介绍： Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment