Production and regeneration of activated carbon One of the technological lines of ENVIROHEMP is the production of high quality activated carbon from different agro-forestry by-products with the proper conformation depending on its end use (PAC and GAC). At ENVIROHEMP, we manufacture high-performance activated carbons and also have an innovative regeneration technology to give new life to spent activated carbon. Water filtration Metal extraction Wastewater treatment Removal of VOCs Gas masks filters