Microalgae cultivation in wastewater for sustainable bio-based products
Harnessing wastewater to cultivate microalgae in open raceway ponds offers a cost-effective and sustainable method for producing bio-based products. This approach reduces reliance on freshwater and commercial fertilizers, enhancing economic and environmental viability.
Overview
Utilizing wastewater to cultivate microalgae in open raceway ponds is a transformative approach to producing bio-based products. This method leverages the nutrient-rich properties of wastewater to foster microalgae growth without the need for expensive commercial fertilizers. It also significantly reduces freshwater usage, aligning with sustainability objectives and lowering operational costs. The resultant biomass can be converted into valuable base chemicals such as bio-Naphta, presenting a dual benefit of waste reduction and renewable energy generation.
Technical specifications
This technology employs open raceway ponds for microalgae cultivation, utilizing wastewater as a primary nutrient source. Key operational parameters include CO2 injection, pH regulation, mixing intensity, harvesting regime, and hydraulic retention time. Optimizing these factors enhances biomass yield and product generation. The approach minimizes traditional freshwater and nutrient supplement requirements, leading to reduced production costs and environmental impact.
Technology readiness level
Currently at Technology Readiness Level 5, this solution has been validated in relevant environments. A 100m2 open raceway pond is being constructed at Murdoch University's Algae R&D Centre to further assess scalability, system reliability, and economic feasibility. Future plans include evaluating the biomass for base chemical production and performing a comprehensive techno-economic analysis.
About Murdoch University
Murdoch University is a comprehensive public research university based in Perth, Western Australia, with a multi‑campus footprint and an applied, industry‑engaged ethos. Co-location with the Murdoch Health and Knowledge Precinct—adjacent to two major hospitals—provides direct pathways to clinicians, patients, and clinical translation. On‑campus assets include a university veterinary hospital and advanced omics and analytical laboratories that support collaborative studies from bench to field. Research is supported by competitive national funding, including the Australian Research Council and National Health and Medical Research Council, alongside state and industry partnerships. A dedicated technology transfer office streamlines IP, contracting, and startup support to move discoveries into the market.
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