Vienna with advanced wastewater treatment technology to protect water – sewage t
The next 10 years, the global scarcity of water resources available for consumption will reach 35%. The whole world is to find effective countermeasures, the main idea is twofold: First, develop water-saving technologies; second is to increase the supply of water, such as sewage Water Department Management and reuse, desalination and so on. In recent years, some new efficient water-saving technologies, water treatment technology resulted in rapid development. Here, some of our special correspondent in the country on the latest developments in water treatment technology and the latest relevant reports back the results to readers.
Many people who have been to Vienna, the city will be impressed by the fine quality, every household will tap out the sweet and cool water, often in Vienna here and say that the water unique in the world. Difficult to imagine the City of Vienna close to the Danube, but do not rely on drinking water supply even, but mainly rely on dozens of kilometers away from the mountain spring water to enter Vienna and the Vienna forest groundwater. Press was even more admirable is that people enjoy nature in Vienna to provide good water, but also equally concerned about how clean the water back to nature.
Recently, the reporter interviewed the main sewage treatment plant in Vienna, where not only is Europe's largest and most modern one of the sewage treatment plant, or the City of Vienna Water Resources Protection Project Innovation Achievements Exhibition center.
Vienna, head of the main sewage treatment plant Mikelaosi? Pape told the reporter, sewage treatment plant built in Vienna, the city selected the lowest point Ximo Ling area, it is put into operation in 1986, 100% of property belonging to the City of Vienna . Capacity of sewage treatment plants are designed to meet the treatment needs of 400 million people, laying the water pipeline length of 2300 km, corresponding to the Austrian capital Vienna to Lisbon in the distance. Vienna, now 1.7 million people each year about 200 million cubic meters of sewage produced, more than 98% of the population living waste water discharged into public sewer system, these living wastewater and industrial, commercial waste water to the main sewage treatment plant in Vienna, the need to go through 20 hours purification will be discharged into the Danube.
2005, in order to meet the European Union and Austria on the Danube discharges the latest standards set, while ensuring the future of Vienna can enjoy pure water, municipal government invested 220 million euros the Vienna-based Sewage Treatment Plant Phase II expansion of the sewage bio-processing equipment. By expanding not only improve the water quality of rivers in the Vienna area, while allowing the main sewage treatment plant in Vienna to become the EU's key environmental demonstration projects. Expansion project designer, Professor University of Vienna, Helmut? Keluoyisi that extension of the Vienna main sewage treatment plant has become an important city of Vienna Water Pollution Control facilities, and by their level of advanced technology for sustainable environmental development Vienna international reputation continue to win.
Vienna Main Sewage Treatment Plant project manager Gerhard? Million Dell told reporters in Vienna, the main sewage treatment plant to go through mechanical treatment and biological treatment in two phases. Through these two processes, urban waste water in more than 95% carbon, 80% of nitrogen, phosphate and more than 90% over 95% of organic pollutants have been removed. The main sewage treatment plant effluent in the present day, clean out from the 100 tons of carbon, 30 tons of nitrogen and 5 tons of phosphate, during processing of large quantities of organic Sludge Were transported to the remote heating plant burning Vienna, for the manufacture of heat. Meanwhile, the sewage treatment plant using modern intensive management, sewage treatment plant's normal management and operation of only 159 employees.
Visited the scene after a detailed understanding and, finally clear Vienna's main sewage treatment plant modernization of water flow. Sewage into the main sewage treatment plant, the first thing to go through a mechanical process of purification, simple to biological purification, which is the world's most sewage treatment plants with sewage purification. In the mechanical treatment process, the sewage pollution of the larger particles will be removed. The first step, the sewage tank by sand and gravel deposits, where every week some 15 tons of gravel was removed the larger solids. The second step, water screw pump through 6 are pumping and treatment facilities in the high to the same height, every screw pump 4500 liters per second can be pumped to the sewage. The third step, water will flow through a fine sieve, this time longer than 6 mm in sewage and floating debris suspended will be removed. The fourth step, the sewage will flow through the sand with sub-channel device, water flow control channels 10 cm / sec, to ensure sewage solids sink to the bottom, where you can remove 5 tons per day coarse. The fifth step, the sewage flows to the initial Sedimentation , Where wastewater sludge will be the initial precipitation, precipitation approximately 80 tons per day? 120 tons of sludge. The sludge is then collected into the ditch of sludge, then pumping into the special Sludge treatment equipment . After these five steps to complete the mechanical sewage treatment phase, after the initial purification of waste water to flow into the second phase of the bio-purification equipment. In the second phase of expansion before the biological treatment process, the main sewage treatment plant in Vienna with only a simple biological wastewater treatment, mainly through the mechanical purification of sewage let into another open sedimentation tanks, sedimentation tanks of the ventilation system connected to the oxygen Input the trillions of tanks used in the manufacture of biodegradable carbon and nitrogen in sewage bacteria and microorganisms in the degradation process due to the formation of aerobic micro-organisms will breed a lot of "sludge." Then water will enter the middle of settling ponds and stay two hours, where "activated sludge" will be precipitation, then water, 85% carbon and 30% of nitrogen has been removed.
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