Sewage treatment technology of environmental protection project

Sewage treatment technology of environmental protection project



In environmental engineering, urban sewage treatment has always been a prominent problem. As we all know, the problem of global water resources shortage and the aggravation of wastewater pollution load are becoming increasingly serious, and in recent years, with the continuous increase of water consumption in production and life, the sewage discharge in the city is also increasing year by year. Under this background, higher requirements are put forward for sewage treatment. However, in terms of the current situation, due to the relatively backward development of sewage treatment technology and the relative lack of management level, the actual urban sewage treatment efficiency is relatively low, which greatly affects people's quality of life and health, but also affects the sustainable development of the city.



1、 Main sources of urban sewage



Industrial wastewater



Industrial wastewater is one of the important components of urban sewage, which refers to the wastewater produced in the production process of enterprises. In recent years, with the rapid development of urbanization in China, the number of various types of enterprises in the city is increasing. In the production process of enterprises, whether it is equipment cleaning, site cleaning or other procedures, a large number of wastewater will be produced, so the discharge of industrial wastewater in the city is also increasing year by year. Especially in some seriously polluted chemical enterprises, the amount of industrial waste water discharged every year is very large and the pollution is very high, which not only has a great negative impact on the daily life and health of urban residents, but also has brought great harm to the urban environment.



2 domestic wastewater



As the name implies, domestic wastewater refers to the waste water produced in people's daily life. In recent years, with the continuous improvement of China's social and economic development level, people's demand for water in daily life is growing, and correspondingly, the domestic garbage and domestic sewage generated are also increasing, resulting in the increase of domestic wastewater discharge year by year. Although domestic wastewater is not as polluted as industrial wastewater, it will also pollute the urban water source to a certain extent. At present, the construction of drainage pipe network in most cities in China is not perfect, so many urban domestic sewage will be discharged into the ditch, which will cause urban water pollution, and over time, it will lead to the gradual deterioration of urban environment, and ultimately affect the health of urban residents.



2、 Problems of urban sewage treatment in Environmental Engineering



1. Weak sewage treatment capacity



In terms of the current situation, the development of sewage treatment technology in China is relatively backward, and the management level is also insufficient. Compared with the increasing sewage discharge in the city, the current sewage treatment capacity is obviously unable to match with it. Especially compared with some developed countries, there is still a big gap in the overall sewage treatment capacity of China.



1. Insufficient utilization of rainwater treatment



Rainwater is one of the precious resources given to human beings by nature. If rainwater can be used properly, the problem of urban water shortage can be greatly alleviated. Therefore, in the process of urban sewage treatment, we should take effective measures to treat and utilize rainwater. However, in reality, people often ignore the treatment and utilization of rainwater resources, and directly discharge them from the urban pipeline, which not only wastes a lot of water resources, but also easily forms pollution when the rainy season comes.



2. Less government investment



In the municipal construction of the city, the construction of sewage treatment system is an important content. Through the construction of a perfect urban sewage treatment system, we can strengthen the efficiency of urban sewage treatment, optimize the urban water environment, and improve the overall water quality of the city. However, if we want to build a perfect urban sewage treatment system, we need to spend a lot of money, but in reality, the government of many cities in our country has less investment in this respect, which is not enough to keep the urban sewage treatment in an efficient and stable state. Contact sewage treasure or see http://www.dowater.com More relevant technical documents.



3、 Common urban sewage treatment technology



1 SBR Technology



SBR technology, namely sequencing batch activated sludge technology, is mainly used to treat organic matters in municipal wastewater. The main characteristics of the technology are the orderly operation and intermittent operation, and the core of the technology is the SBR reactor which integrates homogenization, primary sedimentation, biodegradation and secondary sedimentation. By using this technology, the wastewater can be chemically reacted, and then the pollutants can be separated and treated by sedimentation, drainage and sludge discharge.



2 ab Technology



AB technology, namely adsorption biodegradation process, is a relatively new sewage treatment technology, and belongs to one of activated sludge technology. The technology can treat the sewage by stages, which is divided into three sections: pretreatment, a and B in the whole system. Among them, Section A is divided into adsorption tank and intermediate sedimentation tank, and section B is divided into aeration biological reaction tank and secondary sedimentation tank. Both sections have independent sludge return system and are separated respectively. Because the technology can buffer pH, resist the influence of toxic and harmful substances, and has low cost, it is more suitable for cities with low economic development level.

4、 Measures to strengthen urban sewage treatment



1. Recycle urban sewage



In recent years, the problem of global water resources shortage is becoming increasingly serious, and the problem of low efficiency of water resources utilization exists in China. Therefore, every city should try every means to recycle urban sewage, so as to improve the effect of sewage treatment and save water resources. Good treatment of sewage is the basis for recycling of sewage, but now many people have misunderstood this aspect and think that even the treated sewage is not safe. Therefore, the government should increase publicity efforts to make people have a correct understanding of reclaimed water.



2. Innovation of sewage treatment technology



This paper introduces SBR technology, AB technology, and other commonly used urban sewage treatment technologies. These technologies have their own advantages and disadvantages. In the future, China should further strengthen technology research and innovation of sewage treatment technology. In addition, in the process of urban sewage treatment, whether the pipeline network design is reasonable or not is very important. Therefore, in the pipeline network design, we must design according to the actual production and treatment of urban sewage, and constantly optimize the design scheme, so as to minimize the resource loss in the process of sewage treatment. In the aspect of urban sewage treatment, at present, most cities in our country implement primary treatment, but do not carry out phosphorus and nitrogen removal treatment, so the treated water quality is difficult to meet the reuse requirements. Therefore, it is necessary to further improve the sewage treatment process to achieve the fundamental goal of recycling urban sewage.



5、 Conclusion



To sum up, urban sewage is mainly composed of industrial wastewater and domestic wastewater. Whether urban sewage can be effectively treated is directly related to the quality of life of urban residents and the quality of urban environment. At present, there are some problems in the sewage treatment of most cities in China, so we should actively improve these problems and adopt scientific sewage treatment technology in the future.

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