Research On The Utilization Of Water Recycling Technology Within Protection Engineering

In this paper, some research and discussion were made for the water recycling technology within the protection engineering. The protection engineering is underground military headquarters in wartime, it need to be multi-dimensional protection, water protection system is one of the basic guarantees of the protection engineering. In order to improve the Water storage capacity of the protection engineering in wartime. Under the limited conditions, it is necessary to improve the degree of water recycling of the protection engineering.In view of military strength in recent years, countries around the world continued to strengthen and enhance China's national defense strength is the general trend. Water is an important part of protection engineering internal security, personnel life, decontamination, diesel generators, air-conditioning unit and so can not do without water security, the world value the protection works in the construction of water supply security system, and attach importance to the water cycle technology research and water recycling of protection engineering.At present, within the China's protection works have been built, the reservoir capacity is limited, can not meet the growing water demands in the protection engineering. And we have built water treatment facility has been operating for many years, coupled with water treatment technologies and processes backwardness, resulting in poor quality of water within the protection works, it is difficult to ensure protection district healthy of staff and soldiers, affecting protection zone of the protection work.With worldwide awareness of environmental protection, energy, recycling awareness growing, countries have invested a great deal of research work. Water treatment and recycling is also one of the aspects of water recycling technology and energy recycling. with the Water treatment and recycling technology developed rapidly, a lot of water recycling facilities and projects have been put into use, the sewage wastewater treatment and then to reuse, to achieve environmental protection and utilization of water resources, and our development is relatively slow in this regard. within the protection engineering, in accordance with the requirements of water recycling technology, through analysis of existing sewage water quality, in order to determine a reasonable and efficient treatment process. All the requirements for the project, given the protection works of this particular water environment and its own features. In accordance with the requirements of domestic water, treated effluent will be used for flushing, decontamination and mechanical cooling water, it is necessary to ensure that the effluent quality to achieve "urban miscellaneous water sanitary standards", the 50% directly for toilet flushing water; the remaining 50% will be for advanced treatment, to reach the "drinking water health standards" and "wartime drinking water health standards" requirements. Study made three programs:Electro-coagulation ultrasonic membrane treatment process, oxidation sand filter program, oxidation and filtration programs, papers has done a comparison of the three program in an integrated manner. Finally, determined the Electro-coagulation ultrasonic membrane treatment process as the program for wastewater recycling and reuse. The process uses a pure physical-chemical treatment process alternative to conventional biological treatment processes, with a quick start, can be interrupted to run, and without having to train microorganisms in advance; using Electro-coagulation replace conventional coagulation, without advance preparation of coagulant, simply operate the coagulation process can be accurately and quickly completed by the power; using of ultra-filtration membrane, filtration accuracy is much higher than conventional filter methods, using intermittent ultrasonic cleaning membrane fouling, without recoil can ensure the film's long-term stable operation; for the entire treatment project achieved a fully automated control, with both manual operation to ensure that the processing normally and stably operate.In order to test the feasibility of the selected technology and rationality, but also in the process of electrolytic flocculation, ultra-filtration membrane, activated carbon, ultraviolet disinfection unit of the indoor simulation experiments, and described some reasons for membrane fouling and how to eliminate membrane fouling. Experimental results show that:Electro flocculation, membranes, activated carbon processing units can remove the wastewater COD effectively, respectively 50-60%,75%,60-75%, UV disinfection of sewage bacteria kill rate of 99%. The whole process simulation results show that:The Electro-coagulation ultrasonic membrane treatment technology on wastewater processing, primary and secondary effluent water quality have reached the requirements. Turbidity, BOD5, and coliforms removal rate respectively 98%, 89.8% and 99%. From an economic analysis, by calculation, tons of water treatment cost of around 1.35 yuan/m3.