Ways to reuse urban sewage
1.1 Industrial production
After a certain amount of treatment, urban sewage can also be used in industrial production, such as process water, boiler water, and cooling water. In developed countries, industrial water consumption accounts for more than half of the entire city's water consumption. With the shortage of water resources and the upward adjustment of water prices, in order to avoid the impact of the economic benefits of enterprises due to water problems, enterprises urgently need to solve the water problem. The main method is to treat the sewage and reuse it to improve the utilization rate of water. Since industrial water has generally low requirements for water quality, it is necessary to treat urban sewage before rationally using it according to different uses.
1.2 Supplement existing water sources
After treatment, urban sewage can be discharged into surface water to dilute the urban sewage. For the surface subsidence caused by the excessive use of urban groundwater, urban sewage reuse can be used to supplement the groundwater, but the premise is that the urban sewage has been treated and meets the relevant standards. The reuse of urban sewage to surface water can effectively reduce sewage discharge and meet the sustainability of social development.
1.3 Agricultural irrigation
The water consumption of agricultural irrigation is extremely large, and its irrigation requirements for water quality are low. Therefore, the reuse of urban sewage can be widely used in the field of agricultural irrigation. Urban sewage contains a lot of pollutants. If untreated urban sewage is directly used for irrigation, it will pollute the soil. Therefore, it is necessary to treat the urban sewage and then use it for irrigation, and the urban sewage contains nitrogen, phosphorus and organic matter that can be used as fertilizer. , The purification effect of soil and plants can also reduce sewage pollution, killing two birds with one stone.
1.4 City life
The water consumption of urban residents is increasing year by year. If the use of freshwater resources is not distinguished, it will cause great waste. Therefore, urban sewage can be treated according to different needs, and then used scientifically, such as for urban greening, road cleaning, fire fighting and building construction.
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