Sewage treatment plants, equipped with various pumps and units, in the concept of people, there should be large energy consumers, but in fact, sewage can also turn waste into treasure, used to save energy.
Reporter Wang Jin said, "This thermometer can measure the temperature of sewage. You can see that the water temperature is about 26 degrees, and the outdoor temperature is about 32 degrees. The heat pump behind me can use this temperature difference for the whole sewage. Air conditioning service is provided in the building of the treatment plant."
Here is a sewage treatment plant in Beijing Gaobeidian. They use sewage water source heat pump technology for the first time in China. They can use the temperature difference between sewage and outdoor temperature to heat and cool indoors, which is 30% more energy efficient than using central air conditioning. Calculated by the construction area of ​​30,000 square meters of the whole plant, it can save more than 90 degrees per hour, and the money saved by one year of electricity saving is more than 600,000 yuan. In addition, the biogas generated in the sewage treatment process is not wasted, and all is used to generate electricity, which saves a lot of energy.
Zhu Xiangdong, director of the Gaobeidian Wastewater Treatment Plant, said that “the amount of biogas power generation reached 14 million kWh last year, reaching 28% of the total power supply of the whole plant, and the electricity cost saved was 8 million yuan.â€
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