Mechanical, thermal, and chemical-based treatments are generally used to manage PET pollution.  However, to function at this high temperature, there is a requirement of thermostable enzymes.  The thermostability could be enhanced using glycosylation, immobilization, and enzyme engineering.  Furthermore, the use of surfactants, additives such as Ca2+, Mg2+, and hydrophobins (cysteine-rich proteins), has also been reported to enhance the enzymatic PET hydrolysis through facilitating easy accessibility of PET polymers. 
THERM