ArticleMicrobiology spectrum2026
Treatment of mariculture wastewater by indigenous cyanobacteria-bacteria consortium in a photobioreactor.
Article in Microbiology spectrum, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The bioexploration of indigenous bacterial and algal species presents a promising approach for local wastewater treatment. In this study, an indigenous cyanobacteria-bacteria consortium was collected from rock surfaces at the discharge outlet of mariculture wastewater in Zhangzhou City, China, and subsequently inoculated into a photobioreactor (PBR) for treating both simulated and actual mariculture wastewater. The effects of influent pollutant concentration, consortium inoculation mass, and hydraulic retention time on the treatment performance of the PBR were systematically investigated. Results indicated that the PBR inoculated with this indigenous bacteria-algae consortium exhibited strong adaptability in treating both simulated and actual mariculture wastewater across varying pollutant concentrations. Furthermore, the PBR achieved significant removal of total organic carbon, total nitrogen, nitrite nitrogen, ammonia nitrogen, and total phosphorus from actual shrimp mariculture wastewater within a short period (2-4 h), while considerably enhancing the dissolved oxygen level of the treated effluent. High-throughput sequencing revealed that the consortium was primarily composed of the bacterial phyla Pseudomonadota, Bacteroidota, and Cyanobacteriota, with the dominant species being green cyanobacteria IMPORTANCE: This study developed a sustainable approach for mariculture wastewater treatment by utilizing indigenous biofilm aggregates-comprising bacteria and algae-harvested directly from a local wastewater discharge outlet. Key operational parameters, including inoculum mass, influent pollutant concentration, and hydraulic retention time, were systematically evaluated to optimize treatment performance in a photobioreactor. Furthermore, shifts in microbial community composition and relative abundance were analyzed before and after operation. The results provide valuable insights for the design of efficient and low-cost biological treatment systems tailored to mariculture effluent.
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