Described herein is a method of remediating a water source of a target aquatic life. The method comprises collecting at least one target species of aquatic life from a water source, separating an oil from the solids of the target aquatic life, and refining a polyunsaturated fatty acid (PUFA) mixture from the oil. The water source is at least partially remediated by collecting the at least one target species of aquatic life from the water source.

Disclosed is a process for de-acidification of fats and oils, to obtain micronutrients, to obtain a fatty acid product, and recovery of refined oils, comprising: feeding pre-treated oil feed stream to a vacuum steam stripping section, stripping off volatile phases. Feeding the stripped off the volatile phases to a condensing stage providing a condensed phase and a vapour phase. Sending the condensed phase to a vacuum distillation operation and sending the vapour phase to a cold condensation stage. Subjecting the condensed phase to a vacuum distillation operation, and obtaining a high temperature distillate and a stream of volatiles. Feeding the vapour phase from the high temperature condensing stage along with the stream of volatiles from the vacuum distillation operation to the cold condensation stage obtaining a stream of non-condensable gases and a cold temperature distillate, letting the stream of non-condensable gases continue to a vacuum system, and recovering from the vacuum steam stripping section a stream of refined oil.