Polyaspartic acid is a new type of highly biodegradable and environmental friendly water treatment agent.

Recently, poly (d, l-lactide) -poly (ethylene glycol) (PLA-PEG) block copolymers have been widely applied owing to the favorable biodegradability and biocompatibility.

Here we make more discussion on the degradation of lignin by enzymes secreted by white rot fungi on the basis of biodegradation of lignin and cellulose.