With the rapid development of industrialization and urbanization, the problem of water pollution has become increasingly serious, which has become one of the focuses of global attention. In order to solve this problem, various sewage treatment technologies and methods came into being, which played a positive role in protecting the environment and promoting sustainable development. However, in the process of practical application, these treatment technologies have also exposed some weaknesses in environmental protection, which requires us to face up to and find solutions.

First, high energy consumption

Most modern sewage treatment plants rely on electric energy to drive mechanical equipment, such as blowers in aeration tanks. This not only increases the operating cost, but also intensifies the dependence on fossil fuels, which indirectly leads to an increase in greenhouse gas emissions, which is contrary to the current concept of low-carbon life.

Solution:

-Using renewable energy sources to supply electricity, such as installing solar photovoltaic panels or wind turbines to provide some or even all of the required electricity.

-Optimize process design, reduce unnecessary energy consumption links and improve energy utilization efficiency.

Second, improper use of chemical substances

In order to remove pollutants that are difficult to biodegrade in sewage, a large number of chemicals (such as flocculants) are sometimes added. If it is not properly controlled, it may lead to excessive residues in the effluent, resulting in secondary pollution, and long-term accumulation may affect the health of the ecosystem.

Solution:

-Develop more efficient and safe alternatives, such as using microbial flora instead of traditional chemicals for purification.

-Strengthen the training of operators, ensure that drugs are added in strict accordance with the prescribed proportion, and avoid waste and exceeding the standard.

Third, the problem of sludge disposal

The sludge produced by various sewage treatment methods such as physical method, chemical method and biological method is huge, its composition is complex and changeable, and it contains many harmful substances such as heavy metal ions and pathogens. How to properly treat these sludge has become one of the urgent problems to be solved.

Solution:

-Promote ways of resource utilization, such as returning stabilized sludge to farmland as fertilizer or transforming it into energy materials through pyrolysis.

-Establish and improve relevant laws and regulations, clarify the responsible subjects, standardize the collection and transportation process, and prevent illegal dumping.

To sum up, although there are some shortcomings in the field of sewage treatment at present, as long as we actively take measures to improve and perfect it, we will certainly be able to overcome the difficulties and achieve the goal of win-win economic benefits and environmental protection. At the same time, the public should also enhance environmental awareness, reduce waste water from the source, and jointly protect our clear water and blue sky.