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

IF 4.6 2区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Algal Research-Biomass Biofuels and Bioproducts Pub 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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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