ELL Environmental Holdings Ltd is a China-based investment holding company principally engaged in the construction and operation of wastewater treatment facilities and biomass power generation businesses. Its businesses are mainly operated under the build-operate-transfer (BOT) model, including the design of wastewater treatment facilities, through procurement of suitable equipment and materials, the supervision of the construction as well as the on-going operation and maintenance of the facilities throughout the long-term. Its business mainly covers the treatment of municipal, industrial and heavy metal wastewater. The wastewater treatment facilities constitute major revenue of the company.