Sewage treatment industry, how to achieve "green advanced"?

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"Up to now, my country has built nearly 5000 urban and county sewage treatment plants, with a total treatment capacity of more than 0.25 billion cubic meters per day, and an urban sewage treatment rate of more than 98%." The "Implementation Opinions" pointed out that in recent years, my country's sewage collection and treatment facilities have been continuously improved, but "shortcomings" such as low sewage collection efficiency, more greenhouse gas emissions in the sewage treatment process, and low energy resource recovery and utilization still exist.

According to the actual situation of my country's sewage treatment industry, the "Implementation Opinions" deployed key tasks such as strengthening water-saving efficiency at the source and improving the efficiency of sewage collection. In addition, it is also the key to strengthen the energy saving and carbon reduction of sewage treatment.

The grid room, sedimentation tank and biochemical tank are ring by ring, and sewage flows in and out between various equipment. Industry insiders pointed out that as an enterprise dealing with various pollutants in domestic sewage, although the sewage treatment plant is responsible for the green mission of improving the water quality standard and reducing the water environment problems such as black and odorous water body and eutrophication, the sewage treatment mode of "exchanging energy consumption for water quality" makes the equipment inevitably produce certain carbon emissions during operation, There is also the risk of transferring water pollution to air pollution.

Relevant data show that the carbon emissions of the sewage treatment industry account for about 1% of the total emissions of the whole society, mainly from the degradation of organic pollutants in the water, releasing greenhouse gases such as carbon dioxide, methane and nitrous oxide. In addition to the above-mentioned direct emissions, the electricity and heat energy consumption required for the operation of sewage treatment plants, as well as the production and transportation of chemicals used for sewage treatment, will also indirectly generate carbon emissions.

In recent years, with the increase of sewage treatment capacity brought about by the development of urbanization, upgrading and upgrading has become a consistent action of many sewage treatment plants, and the resulting carbon emissions have also increased.

The reporter checked the public information and found that in June 2023, an ''Administrative Penalty Decision'' issued by the Beijing Municipal Bureau of Ecology and Environment showed that a local company whose main business is sewage treatment and water reuse treatment was due to over-quota emissions of carbon dioxide. More than 4000 tons were fined more than 200 million yuan.

Carbon reduction has become a subject that the sewage treatment industry must face. The "Implementation Opinion" will reduce carbon reduction synergies to a prominent position.

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