Pond scum could soon fuel cars and wrap your groceries
S SK, S BK, J S, R AK, Jayabal R
Biofuels
The algae growing in a backyard pond or a home aquaculture setup isn't just pond scum, it's a raw material that researchers can turn into fuel, biodegradable plastic film, and other products from a single harvest, which is the kind of closed-loop thinking home composters and permaculture growers already practice at smaller scale.
Scientists reviewed dozens of studies on turning algae, both the tiny microscopic kind and the seaweed kind, into useful stuff like biodiesel, plastic-like films, and biogas. The big insight is that doing several of these processes together at once, instead of just making one product, cuts costs dramatically and makes better use of every part of the plant. Seaweed-based films even reach the strength of some conventional plastics, which is a promising sign for replacing packaging materials down the road.
Key Findings
Microalgae with 40-70% lipid content by dry weight can support biodiesel production
Hydrothermal liquefaction of wet biomass yields 30-50 wt% bio-crude with energy density of 35-40 MJ/kg
Integrating fuel and co-product production can lower costs to about $2.50/gallon versus $4-7/gallon for stand-alone algal biodiesel
chevron_right Technical Summary
Algae can be turned into biodiesel, jet-fuel-like bio-crude, and plastic-replacing bioplastics all from the same batch of biomass, and combining these processes together makes the economics far more attractive than making just one product alone.
Abstract Preview
Original paper
Integrated Algal Biorefineries for Biofuel and Bioplastic Co-Production: Process Performance, Circularity, and Scale-Up.
Algal biorefineries provide a platform for producing fuels, biodegradable materials, and higher-value co-products from the same biomass resource. This review examines integrated pathways that conne...
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Seaweed, or macroalgae, refers to thousands of species of macroscopic, multicellular, marine algae. The term includes some types of Rhodophyta (red), Phaeophyta (brown) and Chlorophyta (green) macroalgae. Seaweed species such as kelps provide essential nursery habitat for fisheries and other mari...