A Review of Recovery and Utilization of Heat from Wastewater Mixed with Deep Well Aeration Tank

Abstract

At present, environmental pollution and energy consumption have become one of the major problems in the world. Municipal sewage is a better clean energy source. While treating sewage in deep well aeration tank, sewage source heat pump technology can be used to recover its heat. It can be used for cooling and heat demand of buildings wholly or partially, reduce the consumption of coal and oil, and then reduce the total amount of harmful substances released to the atmosphere by combustion. Sow clean and renewable energy. This is a clean and renewable energy source. Research Background and Significance Nowadays, building energy consumption accounts for 30% of the total energy consumption in China, heating and air-conditioning energy consumption has exceeded 1/2 of building energy consumption. According to the current level of building energy consumption, by 2020, China needs to increase 140 million tons of standard coal per year for heating and 400-450 billion kWh/a of electricity consumption[1].Sustainable energy development and environmental issues have become the focus of attention of all countries in the world. According to the latest survey and analysis by the U.S. Energy Agency in 2013, the total world energy consumption will increase from 524 Btu in 2010 to 630 Btu in 2020. By 2040, it will reach 820 Btu, with an annual growth rate of 1.50%[2,3]. Table 1. Energy Consumption in Industry, Construction and Transportation item year 201