Knowledge Mapping of High-Rate Algal Ponds Research

High-rate algal ponds (HRAPs) are a highly promoted wastewater treatment system that uses sunlight as an energy source to provide the oxygen needed in through photosynthesis and has high nutrient organic matter removal capacity. In addition, microalgae can use growth substrate produce valuable bioproducts, biomaterials, bioenergy, so it is receiving more attention. This review bibliometric analysis explore current research hotspots future trends this emerging technology. By analyzing papers related HRAPs published Web of Science (WOS) from 1987 2021 based on co-occurrence clustering keywords, shows mainly focused treatment, removal, microalgal biomass, biofuel, biogas upgrading. future, in-depth will continue be added contribution environmental sustainability, including E. coli upgrading aquaculture wastewater, purple phototrophic bacteria, aqueous biorefineries, biorefineries. The results assist scholars systematically understanding status, frontiers, macro perspective.