Environmental protection people hot sewage treatment "low carbonization" what have said?

With the clarity of the "30·60" low-carbon development goals, the research on carbon reduction and carbon neutrality has become more in-depth, and the "high energy consumption" industry of sewage treatment is also actively responding to the transformation, while promoting the utilization of sewage resources, to achieve synergies between pollution reduction and carbon reduction.

In order to accurately grasp the problems of industrial development, understand the operating conditions of water enterprises, and identify the practical goals of pollution reduction and carbon reduction of sewage plants, the Environment Chamber of Commerce organized some member enterprises to hold industrial seminars, and invited Professor Wang Hongchen from Renmin University to jointly discuss the opportunities and challenges of the sewage treatment industry and the annual development of water enterprises under the current "dual carbon" goal. As well as operational difficulties and pain points related topics. The seminar was moderated by Ma Hui, Secretary General of the Environment Chamber of Commerce.

China's urban sewage treatment facilities after the "eleventh Five-Year" to "thirteen Five-Year" period of high-speed construction, has formed a large-scale treatment capacity. Official data show that the number of sewage treatment plants in China has increased from 2,496 in 2010 to 5,626 in 2020, and the sewage treatment capacity has also increased from 120 million cubic meters per day in 2010 to 220 million cubic meters per day in 2020.

According to statistics, the electricity consumption of China's sewage treatment industry accounts for about 1% of the country's total electricity consumption, while carbon emissions account for about 2% of the country's total emissions. China's sewage production and treatment scale ranks first in the world, and has been growing for a decade. With the implementation of upgrading in various places, the energy consumption of sewage treatment in China will be further increased. In the face of huge energy consumption and material consumption, it is imperative to reduce carbon emission in the field of sewage treatment. How to reduce energy consumption and carbon emission in wastewater treatment process design and selection has become a hot topic in the industry.

For sewage treatment plants, carbon emissions mainly come from two aspects, one is the direct carbon emissions of various greenhouse gases (CO2, CH4 and N2O) caused by organic degradation and nitrogen conversion in the sewage treatment process; The second is the consumption of electricity and medicine, which indirectly produces carbon emissions. In view of these aspects, how should the sewage treatment industry operate? What should be the carbon reduction path of sewage treatment industry?

In response, Wang Hongchen, a professor at Renmin University of China, sorted out the global carbon situation. In 2019, the global carbon emissions were nearly 60 billion tons, and the three major greenhouse gases CO2, CH4 and N2O accounted for 97.9% of the total carbon emissions, accounting for 74.4%, 17.3% and 6.2% respectively. The emissions of these gases mainly involve four major industry categories: energy utilization, agriculture, forestry and animal husbandry, industrial production and waste disposal, accounting for 73.2%, 18.4%, 5.2% and 3.2% respectively. Waste disposal accounted for 3.2%, including garbage treatment, industrial wastewater treatment and domestic sewage treatment, of which waste water discharge accounted for 1.3%. CO2 mainly comes from energy utilization, CH4, N2O comes from the other three categories of direct emissions, drainage and sewage treatment industry is also an important source of emissions.

For the carbon emission reduction of sewage treatment, Professor Wang Hongchen put forward several technical path suggestions:

1. Reduce all anaerobic links in the sewage treatment system, gradually eliminate septic tanks, reduce pipeline siltation, and eliminate anaerobic areas in treatment facilities.

2, study and prevent N2O accumulation, prevent N2O production into the biological treatment operation control system.

3, the operation control and fine management to a new level, and strive to reduce energy and material consumption.

As a water enterprise with a mission in the shoulder, nearly a year after the "30·60" dual carbon goal was proposed, they have also increased their actions and started the collaborative governance of pollution reduction and carbon reduction.

Wei Bin, manager of the sewage department of the Transportation and Management Center of Beikong Water Group, said that in the context of the national "dual carbon" strategy, in the field of water treatment, around the direction of green and low-carbon cycle development, the energy conservation and consumption reduction of sewage resource technology, water treatment process and operation links are current research hotspots and future trends in the industry. As a leader in the field of water, Beijing Holding Water has been deepening the implementation of energy conservation, emission reduction, pollution reduction and carbon reduction, constantly improving the level of sewage treatment technology, and achieving carbon reduction throughout the life cycle of the water treatment industry.

Ji Junbiao, vice president of Jinke Environment, said that this year, Jinke Environment signed a cooperation framework agreement with Longi Shares, the leader of the photovoltaic industry, to jointly create a new model of urban sustainable development of "water saving + pollution reduction + carbon reduction". The two sides will give play to their respective advantages in the field of membrane water treatment and photovoltaic, jointly build a dual-resource circular economy of water and photovoltaic power generation, innovate industrial collaboration from more levels, provide better sewage treatment and resource solutions for the photovoltaic industry, and help the "carbon neutral" goal to be realized as soon as possible.

Dong Zhiming, vice president of Sander Group, said that Sander Group from the previous sewage treatment, waste treatment, landfill, and later wind power, lithium batteries and waste battery recycling are all in the industrial chain around the carbon neutral layout. It is hoped that the Chamber of Commerce will lead the organization to study the accounting of carbon emissions and emission reduction of sewage treatment, solid waste disposal and other projects, and provide an accounting basis for environmental protection enterprises to achieve the "30·60" goal.

Warring States Long, vice president of the Research Institute of Dayu Water Saving Group, said that the company's main business is "three agriculture and three water" (agricultural efficient water saving, rural sewage treatment, farmers' domestic water), and the products and services provided are indispensable for rural revitalization. In the future, we will also develop smart agriculture, promote the deep integration of a new generation of information technology with agricultural production and management, and deeply participate in the continued construction and modernization of large and medium-sized irrigation areas. Through the construction and operation of rural sewage treatment projects, we can help the construction of beautiful villages and achieve green and low-carbon development.

Yang Bin, chairman of Financial Holding Data, said that it has been more than ten years since entering the intelligent water industry, and the company's main business is the design and development of automated control systems, information management systems and intelligent control systems, providing support for sewage treatment enterprises to reduce pollution and carbon. He admitted that although the development of the industry will always encounter various problems, especially the bottleneck of the construction of smart water needs to be broken through, but to do environmental protection, there is a complex, looking forward to more scientific and technological innovation to empower the industry in the future.

Erui Di Zhu Mingyuan researcher mentioned that the company recently completed the B round of financing, exclusive investment by Baidu. It shows that the intelligent water market is very optimistic. Now more and more operators and contractors realize the necessity and importance of integrating smart water systems into sewage treatment plants, and dig deeper into the gain value and carbon reduction benefits brought by smart water innovation technology.

Liu Ruolang, senior manager of the business management Department of Weipaige government and enterprises, believes that although the demand for smart water is great, there are still some doubts about the actual benefits, and sometimes the benefits are difficult to calculate from a realistic point of view. However, from the perspective of dual carbon, if the value brought by smart water can be quantified through policy support or model innovation, the industrial space will be further opened.

Yang Ning, director of the ecological environmental Protection Division, said that the team focuses on the environmental protection subdivision, and also cooperates with a number of leading enterprises, such as the first capital, Yangtze River Environmental Protection, and many other enterprises in the industry. In the next step, we will establish in-depth cooperation with more enterprises in the environmental field through the platform of the Chamber of Commerce, and make joint efforts to achieve the goal of "30·60".

Professor Wang Hongchen finally stressed that it is necessary to realize that sewage treatment itself is a carbon reduction process, which is a process of both pollution reduction and carbon reduction. Under the premise of meeting environmental standards, through refined operation and technical transformation, to achieve unit optimization and global optimization, accelerate facility construction along the low-carbon technology route, and achieve low-carbon sewage treatment, is the industry's greatest contribution to the "carbon peak, carbon neutral" strategy.