Research On Wastewater Recycling Technology In Jilin Vocational College Of Industry And Technology

Not only the shortage of global freshwater resources, and imbalance in regional publishing, 21st century water resources is becoming a valuable scarce resource. Total water resources are not scarcein in China, but a huge population, is the 13 water-poor individuals are one of the countries in the world. Water resources has not only resources but also as related to national economic and social sustainable development and long-term stability of the major strategic issues. Only for water update, all care of water resources to sustainable use of water resources.At present, China city water supply to the main surface water or groundwater, or water mixed with two, due to indiscriminate discharge of industrial wastewater, in some places more than 80% of the surface water, ground water pollution. This situation becomes more severe, not only reduces the use of water features, and further aggravated the water shortage in on Chinese sustainable development strategy is being implemented a serious impact, but also a serious threat to the safety of drinking water of urban residents and people's health.Jilin is the second largest city of Jilin Province, the region rich in natural resources, is a highly competitive industrial city. Abundant water resources in the northern city of rare, but the irrational use of local water resources, water degradation, deterioration of water quality and other environmental problems have become more severe, greatly restricted the construction and development of the national economy.City wastewater recycling for improving water shortages and promoting economic development and reduce environmental pollution has important significance, has been coming under increasing attention. The kind of water is actually recycled water, water quality and feed water between sewage water, hence the name " recycled water". Although it can not drink the water, but it can be used for some of the water quality of less demanding situations. Of the development situation of Chinese construction of water recycling technology and equipment with the practical application value, in line with China the social requirements of sustainable development, regarding solves our country fresh water resource tense aspect, the alleviation water crisis to have the vital significancePresent wastewater treatment methods used can be divided into four categories: (1) biological treatment (2) physical and chemical treatment methods (3) membrane separation technology (4) biological treatment and membrane separation technology union Biological contact oxidation is an immersion-type biofilm, wastewater and fill in contact on the biofilm, the microorganisms in the biofilm, the wastewater will be purified. Biological contact oxidation method has the following keybenefits:â‘ As the filler surface area large pool of well-oxygenated conditions. Biological contact oxidation pool of biological solids per unit volume than activated sludge aeration tank and the biological filter, therefore, biological contact oxidation method has a high volume load;â‘¡biological contact oxidation process does not require sludge return, therefore, does not exist between the sludge bulking problem, simple operation and management;â‘¢As the bio-solids and more water it is completely mixed, therefore, biological contact oxidation pond water quality and quantity on the strong adaptability to change;â‘£biological contact oxidation of organic volume load is high, the F / M sludge organic matter and the quality ratio) remained at low level, low sludge production.There are more than 6,000 students in Jilin Vocational College of Industry and Technology. Teachers and students in the school a large number of domestic wastewater produced every day, because no measured data, in accordance with 130-190L / (person, day) is approximately 1000m3 per day of wastewater generated.In order to building a green school, people and the harmonious development of the campus, control wastewater CODcr, BOD5 SS, reduce emissions and improve water use efficiency, reduce the cost of greening, it plans to implement wastewater treatment works, water for certain laboratory and some advanced treatment of domestic wastewater quality standards to the landscape as recycled water.According to Jilin Vocational College of Industry and Technology wastewater quality and water quantity characteristics, consider the use of biological contact oxidation process wastewater, to ensure that the recycling of wastewater to reach the standard, and wastewater treatment works required to achieve small footprint, reasonable layout and compact, In the experiment and the actual treatment of wastewater in the process is stable and easy to operate.The experiment lasted four months. We found a practical approach and process, and treated wastewater effluent can reach the water recycling requirements, you can use on the campus landscape treated wastewater. Wastewater used in the biological oxidation and activated carbon adsorption treatment process with integrated high COD removal rate, the advantages of stable and reliable water quality, especially in activated carbon pool is not only to further remove the organic substances in wastewater, but also effectively eliminates volatile than water odor and color, to ensure water quality reliability. In addition this treatment, low cost, and continuous two tandem oxidation process, more and improve the equipment shock load, so the campus by this treatment of wastewater is safe and reliable.