MSU Technologies

Reducing Cultivation and Harvesting Costs for Cyanobacteria

Executive Summary

Our technology enables physical plant managers to control cyanobacterial flocculation, which significantly reduces recovery and dewatering requirements. These requirements alone account for up to 40% of operating costs in production of biofuels, pharmaceuticals, and chemicals from cyanobacteria. This technology works by inducing cyanobacterial cells to grow to a size that makes cells easy to dewater without sacrificing biomass accumulation rates.

Description of Technology

This technology is a modification to cyanobacterial cells that causes the cells to elongate instead of divide, creating large cells that are easily dewatered. Targeted genes are overexpressed following addition of a low-cost, readily available inducer into the pond/raceway/growth media, resulting in deregulated cell division and cells that grow up to 1mm long. This enables controlled flocculation/harvesting that can be tailored to individual industrial collection needs, be it in filtration, centrifugation, or sedimentation. The larger cell size also reduces filtration cost by using larger pored, less costly, and renewable membranes.

Key Benefits

Simple and efficient dewatering of cyanobacteria
Reduced concentration of chemical flocculants, faster flocculation rates
Tunable to user’s specific needs
Minimal capital investment: replaces or reduces need for centrifugation or filtration

Applications