Energy consumption of each processing structures 3.1, sewage treatment systems have centralized sewage treatment system and distributed processing systems. The former refers to a variety of urban sewage, pipe emissions standards in line with the pre-treated industrial waste water and urban snowmelt and precipitation through the city sewer mixed wastewater collection, and then focus on being exported to municipal sewage treatment plants, urban sewage treatment plants and then according to Jin water quality, integrated planning, the adoption of appropriate measures to focus on; after reaching the national emission standards, a sewage treatment into natural water systems. Generally used economically developed medium-sized cities. The system is a large initial investment, we need to lay the appropriate urban sewage pipe network, the high cost of operation and management, and thus for the underdeveloped areas and small towns have great application limitations. Decentralized wastewater treatment system means a plant cell or a small septic tanks or sewage treatment facilities, sewage pretreatment, for possible use in the water flushing toilets, washing the car, poured pavement flower beds and the like. Although the case of distributed processing may lead to processing costs increase, but this approach has its advantages, especially now too focused on increasingly high cost of sewage treatment, processing flow is also growing, decentralized formula approach but also shows its superiority. 3.2 Analysis of energy consumption sewage pump stations as people increasingly serious environmental pollution awareness of the situation and the strengthening of strengthening environmental awareness, and now most cities have built sewage treatment plants, but also by the processing a simple process to upgrade to two or more the depth of treatment. But for medium-sized cities, the general start times or by way of centralized processing. A sewage treatment plant sewage treatment area are large, which requires use of sewage pump stations will be far from the sewage treatment plant upgrade to centralized processing, the sewage pump stations not only to ensure that all water must be elevated to the sewage treatment plant , but also to adapt to changes in the amount of sewage requirements, generally the flow is great, delivery is also very far away, Again sewers are generally buried deeper, the need for high lift pump station, power consumption is very considerable. Electricity consumption is the main root of sewage pump stations, delivery farther away, the higher the price, like Wuhan Dragon King mouth has five sewage treatment plants on sewage pump stations, a large area of ??the nearby sewage pooled their traffic or not, the project is currently being expanded to handle traffic has only 150,000 tons. 3.3, grating, grit chamber and primary sedimentation tank of energy analysis is the use of grid-irons coarse impurities intercept sewage, wastewater passes through the grid, because the barrier will cause trash rack head loss, which requires pumps upgrade sewage effluent potential to increase; Moreover, screenings mechanical crushing process is energy-intensive process. Both of which are major energy consuming processes in the root of the grid. Grit chamber and primary sedimentation tank for removing sewage coarse sand and fine suspended solids, in addition to water damage in the pond water, the sand-scraping scraper and its subsequent processing facilities will be of great energy, but these energy consumption is not large. 3.4 Analysis of energy consumption aeration tank aeration tank is big energy aerobic treatment process, most of the energy is concentrated here. You can reduce the energy consumption of aeration equivalent to solve the energy problem of the aerobic treatment process. Conventional aeration tanks are used mechanical means to sewage bubbling air or charge air from the bottom, and with stirring, etc. so that air and water mix, so that the air is evenly distributed in the wastewater, improve good Oxygen makes reasonable results. Sewage pond aeration residence time in the more than two hours, the volume is quite large, whether it is using an impeller rotating aeration or ventilation cap in the bottom of the drum into the air from the aeration, a great motor power and day and night operation, the energy consumption of its large can be imagined. 3.5, energy anaerobic lagoons and anaerobic treatment equipment at the analysis in addition to aerobic treatment technologies, anaerobic treatment process is also very easy for people to accept the relatively low energy consumption of the anaerobic treatment process, and can produce methane, Recycling is also very convenient, but the anaerobic treatment process, the sewage stays a long time, and to ensure good treatment effect, there must be a better measure of the absence of air. Nevertheless, the trend anaerobic treatment is very promising. 3.6, energy secondary settling tanks and other treatment facilities analyze secondary settling tanks, sewage treatment performed after mud separation area is now commonly used secondary settling tanks have baffles scraping residue, water mud and other devices, two sinks pool area is relatively large. The separated sludge is also used sludge pump to the sludge pumping station, sludge compression processing, etc. are also a lot of energy. Now commonly used mechanical compression processing sludge, concentrated sludge Sinotrans filled into other methods, huge energy consumption, and easy to cause secondary pollution. Like a high concentration of pollutants in the sludge can easily re-enter the water system with the rain, causing secondary pollution, pollution-related secondary treatment is also very nerve-racking thing. 

keywords: Sewage treatment equipment, anaerobic treatment of waste water, grid processing,