The main method of wastewater treatment in enterprises.
With the rapid development of industry, a large amount of wastewater is constantly generated, which has a serious impact on the environment and ecology. In order to protect the environment, companies must adopt effective wastewater treatment methods. This article will introduce the main methods of wastewater treatment in enterprises.
1. Physical treatment.
The physical treatment method is to separate the insoluble substances in the wastewater through physical action. Commonly used physical treatment methods include precipitation, filtration, centrifugal separation, clarification, etc. These methods can effectively remove suspended solids, impurities and grease from wastewater.
2. Chemical treatment method.
Chemical treatment is a chemical reaction that converts dissolved substances in wastewater into harmless or low-toxicity substances. Commonly used chemical treatment methods include acid-base neutralization, redox, chemical precipitation, adsorption, etc. These methods can effectively remove heavy metal ions, harmful organic matter, ammonia nitrogen, etc. from wastewater.
3. Biological treatment.
Biological treatment is the process of converting organic matter in wastewater into harmless substances through the action of microorganisms. Commonly used biological treatment methods include activated sludge method, biofilm method, anaerobic biological treatment method, etc. These methods can effectively remove organic matter, ammonia nitrogen, and total phosphorus from wastewater, among others.
Fourth, the combination of treatment.
Due to the complex composition of wastewater, it is often difficult to achieve the ideal treatment effect with a single treatment method. Therefore, in practical application, the combined treatment method is often adopted, that is, the above methods are combined to achieve better treatment effect. For example, suspended solids and impurities are removed by physical treatment, dissolved substances by chemical treatment, and organic substances by biological treatment.
The basic methods and treatment processes of sewage treatment.
Sewage treatment is one of the important links of environmental protection, and its basic methods and treatment processes mainly include the following aspects:
1. Sewage pretreatment.
The main purpose of sewage pretreatment is to remove suspended solids, oils, harmful substances, etc., and create good conditions for the subsequent treatment process. Commonly used pretreatment methods include grid filtration, sedimentation, degreasing, etc. These methods can effectively remove impurities such as large particulate matter and grease from wastewater.
Second, the first level of treatment.
The main purpose of primary treatment is to remove suspended solids and floating solids in the wastewater, providing a good basis for the subsequent treatment process. Commonly used methods include precipitation and clarification. These methods can effectively remove suspended solids and impurities from wastewater.
3. Secondary treatment.
The main purpose of secondary treatment is to remove organic matter and nutrients from wastewater, and commonly used methods include activated sludge method and biofilm method. These methods can effectively remove substances such as organic matter and total phosphorus from wastewater.
Fourth, in-depth processing.
The main purpose of advanced treatment is to further remove dissolved substances and trace harmful substances from wastewater to meet higher discharge standards or reuse requirements. Commonly used methods include chemical precipitation, redox, adsorption, etc. These methods can effectively remove dissolved and harmful substances from wastewater.
5. Sludge treatment and disposal.
Sludge is a waste product generated in the wastewater treatment process and needs to be properly treated and disposed of. Commonly used sludge treatment methods include sludge thickening, stabilization, and dewatering. These methods can effectively reduce the volume and moisture content of sludge, which is convenient for disposal and utilization. At the same time, sludge can also be recycled through biomass utilization, composting and incineration.
In short, the treatment of enterprise wastewater and sewage is one of the important links of environmental protection, and effective treatment methods and processes need to be adopted to achieve good treatment results. Through the effective combination and application of physical, chemical, biological and other methods, we can better protect the environment and promote sustainable development.