OSC+ collects top- and mid-level oil spills in sea physically. Powered by wind and sun, the pump generates bubbles from seafloor that carry mid-level spill to surface. The top-level spills are collected by water level difference generated by bubbling. The internal spinner performs the first oil-water separation. The oil is led to oil tank for second separation through nano-carbon membrane. The NaOH in the separated seawater reacts with graphene to remove the carcinogenic and water-soluble PAH before the water is discharged to sea. Finally, the oil collected in the oil tank is recycled.