Several processes of integrated sewage treatment
With the acceleration of urbanization, the problem of sewage treatment is becoming increasingly prominent. As an efficient and environmentally friendly sewage treatment method, integrated sewage treatment technology has been widely used in urban sewage treatment. This article will introduce several common processes for integrated wastewater treatment.
1. Anaerobic biological treatment.
Anaerobic biological treatment is a process that uses anaerobic microorganisms to convert organic matter into methane and carbon dioxide. In integrated wastewater treatment, anaerobic biological treatment is usually used as a pretreatment stage to remove some organic matter and reduce the subsequent treatment load. Anaerobic biological treatment has the advantages of low energy consumption and good pollutant removal effect, but it needs to strictly control the conditions during operation to prevent environmental problems such as odor and foam.
2. Aerobic biological treatment.
Aerobic biological treatment is the process of converting organic matter into carbon dioxide and water under aerobic conditions using aerobic microorganisms. In integrated wastewater treatment, aerobic biological treatment is usually used as the main treatment stage to remove most of the organic matter and pollutants such as ammonia nitrogen. Aerobic biological treatment has the advantages of good treatment effect and wide range of application, but it needs to consume a lot of energy and chemicals, and the operating cost is high.
3. Activated sludge method.
The activated sludge method is a treatment method that uses activated sludge to remove pollutants such as organic matter and ammonia nitrogen. In integrated wastewater treatment, the activated sludge process is usually used as the main treatment stage to remove most of the organic matter and pollutants such as ammonia nitrogen. The activated sludge method has the advantages of good treatment effect and stable operation, but it needs to carry out sludge reflux and discharge regularly, which has a certain impact on the environment.
4. Membrane separation technology.
Membrane separation technology is a technology that uses the permeability of membranes to separate different components. In integrated wastewater treatment, membrane separation technology is usually used as an advanced treatment stage to remove pollutants such as dissolved organic compounds and heavy metal ions. Membrane separation technology has the advantages of good treatment effect, low energy consumption and small footprint, but the replacement cycle of the membrane is short, and the membrane module needs to be replaced regularly, which increases the operating cost.
5. Ecological wetland treatment.
Ecological wetland treatment is a treatment method that uses the adsorption and degradation of wetland plants and microorganisms to remove pollutants. In integrated wastewater treatment, ecological wetland treatment is usually used as a tail treatment stage to further remove the remaining organic matter and nutrients. Ecological wetland treatment has the advantages of environmental friendliness and beautiful landscape, but it requires a large area and a long treatment cycle.
In summary, several common processes of integrated wastewater treatment include anaerobic biological treatment, aerobic biological treatment, activated sludge method, membrane separation technology and ecological wetland treatment. Each of these processes has its own advantages and disadvantages, and needs to be selected and combined according to the actual situation. At the same time, in order to improve the effect of integrated sewage treatment and reduce operating costs, it is also necessary to strengthen technology research and development and innovation, and explore more efficient and environmentally friendly sewage treatment technologies.