Static hydrothermal processing and fractionation for production of a collagen peptide with anti-oxidative and anti-aging properties

•Hydrothermal process showed efficacy for collagen hydrolysis.•Elevated temperature and pressure are synergistic in hydrothermal hydrolysis.•Hydrothermal process is an environmentally friendly and effective technology.•An ultrafiltration membrane is useful for separation of bioactive peptides.•Collagen peptides exhibited superior antioxidant and anti-aging abilities.