Located in Chaoyang village, Heqing Town, Pudong New Area, Shanghai Bailonggang sewage treatment plant is an important part of Shanghai sewage treatment phase II project and one of the largest sewage treatment plants in the world. Its treatment capacity accounts for about 1 / 3 of Shanghai's urban sewage treatment capacity. It can process up to 1.72 million cubic meters of sewage per day, serving 3.56 million people in 271.7 square kilometers. Hertz high voltage capacitor is used in the construction of sewage treatment plant.