Effect of harvesting methods on the energy requirement of Tetraselmis sp. biomass production and biocrude yield and quality.

•The energy requirement for harvesting Tetraselmis sp. biomass was 0.49–4.65 MJ/kg.•Harvesting technique affected the microalgal biomass quality.•Microalgal biocrude yield and characteristic varied based on harvesting technique.•Excess Al in electrocoagulation and alum harvested biomass increased biocrude yield.•All microalgal biocrude samples had higher metal contents compared to petrocrude.