Heguo Mining Co., Ltd. was invited to participate in the "2018 China (Hefei) Summit Forum on Promoting High Quality Development"

Heokuang Co., Ltd. was invited to participate in the "20th Meeting of the Soil Environment Professional Committee of the Chinese Soil Society" and "Symposium on Farmland Soil Pollution and Remediation"

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China's first "soil remediation integration equipment" press conference

Water treatment to open a new model of the future of the road still need to explore

Release time:

2018-08-20

[China Environmental Protection Online Sewage Treatment] Under the background of global energy crisis, climate change and resource shortage, the traditional mode of sewage treatment is also undergoing tremendous changes. The development of energy-saving and low-carbon sewage treatment with effective circulation and deep reuse of available materials in sewage The new model has received extensive attention from the international community.

水处理开启新模式未来之路仍需摸索

Water treatment to open a new model of the future of the road still need to explore

Following the signing of the Millennium Declaration in 2000, Member States of the United Nations formulated the Millennium Development Goals (MillenniumDevelopmentGoals,MDGs), of which target 7 is to ensure environmental sustainability. During the Millennium Development Goal period, the proportion of the global population with access to improved sanitation increased from 54 per cent to 68 per cent, and more than 2.1 billion of the world's population gained access to improved sanitation.

The rapid development of global environmental sanitation has also accelerated the progress of the sewage treatment industry: in the past 10 years, China's urban sewage discharge has increased from 32.9 billion tons to about 41.7 billion tons, an increase of more than 30%. The sewage treatment rate has increased rapidly. In the past 2012, China's sewage treatment rate exceeded 85% and is expected to reach 95% in 2020. Nevertheless, with the increasing voice of environmental sustainable development in recent years, the problems of traditional sewage treatment mode have been gradually recognized and paid close attention to by all walks of life.

Open a new mode of sewage treatment

For a long time, the role of municipal sewage treatment plants has been regarded as reducing the pollution of local receiving water by direct discharge of sewage. In order to achieve the set water quality standards, various technologies and methods are superimposed or used in series. The main purpose is to separate and remove the pollutants in the sewage or convert them into harmless substances, so that the water can be purified. For this reason, in addition to consuming a large amount of electricity and chemicals such as flocculants and disinfectants, sewage treatment plants will also produce a large amount of excess sludge and greenhouse gases. It is estimated that the annual power consumption of China's sewage treatment industry accounts for 2-3% of China's total power consumption. In addition, the emissions of greenhouse gases such as methane and nitrous oxide produced in the sewage treatment process account for 4-5% of my country's non-carbon dioxide emissions.

Under the background of global energy crisis, climate change and resource shortage, the traditional mode of sewage treatment is also undergoing great changes. The development of a new mode of sewage treatment with energy saving and low carbon, effective circulation and deep reuse of available materials in sewage has been widely concerned by the international community. However, there is a lack of scientific and systematic approach to how to recognize the environmental sustainability potential of wastewater treatment models.

Net environmental benefits of wastewater treatment

In response to this problem, researchers from the Eco-Environmental Research Center of the Chinese Academy of Sciences put forward the concept of net environmental benefit (NetEnvironmentalBenefit,NEB), that is, to reduce energy consumption, chemical use and energy consumption in the wastewater treatment process through multiple dimensions such as technology and policies. Greenhouse gas emissions and other issues, and maximize the recycling and reuse of useful substances in sewage and sludge. In response to this concept, they constructed a multi-objective assessment framework for wastewater treatment oriented to energy conservation, low carbon and deep resource recovery, and developed indicator weighting algorithms and scenario timing prediction tools using computational simulation and big data methods.

水处理开启新模式未来之路仍需摸索

Using the above-mentioned quantitative assessment method (QuantitativeIntegratedAssessmentApproach), the researchers assessed the environmental sustainability potential of the innovative wastewater treatment model at a global scale. The study found that the development of energy-saving, low-carbon and resource recovery of new sewage treatment model can help to alleviate the environmental load of sewage treatment process, and significantly improve the environmental sustainability of sewage treatment.

Among them, after the implementation of new sewage treatment models in developed countries, the environmentally sustainable potential of sewage treatment has increased by 1.5 times, while this figure is less than 0.6 times for developing countries. The Monte-Carlo analysis further points out that after the model reform is promoted by developed countries, the probability of obtaining net environmental benefits (NEB>0) from sewage treatment is about 65%, while the probability of achieving the same goal in developing countries is less than 10%. From the results, although there is still a certain degree of uncertainty, it still sends us a very strong signal: recycling sewage resources is indeed conducive to improving the environmental sustainability of sewage treatment.

Where is the future of sewage treatment?

水处理开启新模式未来之路仍需摸索

The researchers also point out that wastewater discharge standards can significantly affect the environmentally sustainable potential of wastewater treatment models. To this end, they called for the promotion of the reform of sewage treatment models in the future, especially when implementing a new sewage treatment model driven by the deep recovery of resources, consideration should be given to optimizing the current sewage discharge standards and achieving technological innovation (technologicalinnovation) and adaptation policies (adaptivepolicydevelopment). Coordinated regulation and combination optimization, in order to further improve the environmental sustainability of sewage treatment.

In addition, the researchers pointed out in the future scenario analysis that the environmental sustainability potential brought about by the promotion and implementation of sewage treatment model innovation in different countries and regions around the world is quite different, while developing countries are learning from the successful cases of sewage recycling in developed countries. At the same time, we can develop a new sewage treatment model that meets our own development needs by reducing chemical consumption and promoting sewage energy recovery.

水处理开启新模式未来之路仍需摸索

The above research gives us an in-depth understanding of sewage treatment, especially the upcoming innovation of sewage treatment mode, which further improves the research system of sewage resource management and system evaluation. it will provide strong decision support for the upgrading and transformation of sewage treatment facilities and future investment and construction. Relevant results have been published in the world's authoritative journal "Proceedings of the National Academy of Sciences (PNAS)" and other publications, and have attracted the attention of academic circles, industry and the general public.

(Original title: sewage treatment mode innovation in the future road?)

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Water treatment to open a new model of the future of the road still need to explore

强盛