On July, 2018, Sixei Ltd. Co. won an EPC contract to upgrade the Wastewater Treatment Plant for the landfill of Thong Nhat district, Dong Nai province.
After being upgraded, the wastewater treatment plant is capable of treating a flow-rate of 200 m3/day. The effluent meets the National Technical Regulation on Industrial Wastewater QCVN 40:2011 / BTNMT, column A.