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Benefits of infrastructure symbiosis between coal power and wastewater treatment

Abstract

Symbiotic infrastructure systems facilitate deep decarbonization and efficient water use more than independent improvements in each type of infrastructure. Here we analyse strategies for bridging the coal power and wastewater treatment sectors in China by using sludge and reclaimed water from municipal wastewater treatment as alternative fuels and water sources for coal power generation. We develop a geodatabase covering ~2,400 coal-fired power plants and ~4,200 municipal wastewater treatment plants and conduct an integrated analysis using a customized optimization algorithm and life-cycle assessment. Such infrastructure symbiosis annually offers greenhouse gas (GHG) mitigation of 8.6 Mt CO2 equivalent, equal to 29% and 0.28% of GHG emissions from the wastewater treatment and coal power sectors, respectively. The symbiosis annually conserves 3.0 billion m3 of freshwater, equal to 62% of freshwater consumption by the coal power sector, and provides annual cost savings of 7.5 (3.4–12) billion CNY. Hebei, Shandong, Henan, Jiangsu, Zhejiang, Anhui and Guangdong contribute ~50% of GHG mitigation and ~60% of both freshwater conservation and cost savings due to the proximity of coal power and wastewater treatment plants. Approximately 80% of carbon, water and economic benefits can be achieved via 32% and 44% of all the plant-level linkages for sludge co-combustion and water reuse, respectively. Infrastructure symbiosis provides promising opportunities for both environmental and economic benefits. Policies to boost the establishment of energy–water infrastructure symbiosis would cost-effectively facilitate the achievement of China’s climate and water targets.

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Fig. 1: Environmental benefits of coal power-wastewater treatment symbiosis in China by province.
Fig. 2: Geographic distribution of environmental benefits of coal power-wastewater treatment symbiosis.
Fig. 3: Annual cost changes resulting from sludge co-combustion and water reuse in 2020 CNY.
Fig. 4: Characteristics of sludge and water linkages.
Fig. 5: Ranking of sludge and water linkages.

Data availability

The source data that support all figures and detailed data on CFPPs and WWTPs are provided as Source Data files and Supplementary Data. All data used for this study are provided or available from publicly accessible sources cited. Source data are provided with this paper.

Code availability

The codes that support the findings of this study are available at https://github.com/infraeco/infrastructure.

References

  1. Ferrer, A. L. C., Thomé, A. M. T. & Scavarda, A. J. Sustainable urban infrastructure: a review. Resour. Conserv. Recycl. 128, 360–372 (2018).

    Article  Google Scholar 

  2. Chertow, M. & Ehrenfeld, J. Organizing self‐organizing systems: toward a theory of industrial symbiosis. J. Ind. Ecol. 16, 13–27 (2012).

    Article  Google Scholar 

  3. Lu, Y., Chen, B., Feng, K. & Hubacek, K. Ecological network analysis for carbon metabolism of eco-industrial parks: a case study of a typical eco-industrial park in Beijing. Environ. Sci. Technol. 49, 7254–7264 (2015).

    Article  CAS  Google Scholar 

  4. Xu, M. et al. Gigaton problems need gigaton solutions. Environ. Sci. Technol. 44, 4037–4041 (2010).

    Article  CAS  Google Scholar 

  5. Pandit, A. et al. Infrastructure ecology: an evolving paradigm for sustainable urban development. J. Cleaner Prod. 163, S19–S27 (2017).

    Article  Google Scholar 

  6. Guo, Y., Tian, J., Chertow, M. & Chen, L. Exploring greenhouse gas‐mitigation strategies in Chinese eco‐industrial parks by targeting energy infrastructure stocks. J. Ind. Ecol. 22, 106–120 (2018).

    Article  Google Scholar 

  7. Unruh, G. C. Understanding carbon lock-in. Energy Policy 28, 817–830 (2000).

    Article  Google Scholar 

  8. Müller, D. B. et al. Carbon emissions of infrastructure development. Environ. Sci. Technol. 47, 11739–11746 (2013).

    Article  Google Scholar 

  9. Jiang, Y. China’s water scarcity. J. Environ. Manage. 90, 3185–3196 (2009).

    Article  Google Scholar 

  10. Holland, R. A. et al. Global impacts of energy demand on the freshwater resources of nations. Proc. Natl Acad. Sci. USA 112, E6707–E6716 (2015).

    Article  CAS  Google Scholar 

  11. Wang, X., Wang, X., Huppes, G., Heijungs, R. & Ren, N. Environmental implications of increasingly stringent sewage discharge standards in municipal wastewater treatment plants: case study of a cool area of China. J. Clean. Prod. 94, 278–283 (2015).

    Article  Google Scholar 

  12. Wei, L. et al. Development, current state and future trends of sludge management in China: based on exploratory data and CO2 equivaient emissions analysis. Environ. Int. 144, 106093 (2020).

    Article  CAS  Google Scholar 

  13. China Statistical Yearbook of Urban-Rural Development (Ministry of Housing and Urban-Rural Development of China, 2020). https://www.mohurd.gov.cn/gongkai/fdzdgknr/sjfb/tjxx/jstjnj/index.html

  14. Tong, D. et al. Current emissions and future mitigation pathways of coal-fired power plants in China from 2010 to 2030. Environ. Sci. Technol. 52, 12905–12914 (2018).

    Article  CAS  Google Scholar 

  15. Zhang, C., Zhong, L. & Wang, J. Decoupling between water use and thermoelectric power generation growth in China. Nat. Energy 3, 792–799 (2018).

    Article  Google Scholar 

  16. World Energy Outlook 2019 (International Energy Agency, 2019); https://www.iea.org/reports/world-energy-outlook-2019

  17. Xu, M., Weissburg, M., Newell, J. P. & Crittenden, J. C. Developing a science of infrastructure ecology for sustainable urban systems. Environ. Sci. Technol. 46, 7928–7929 (2012).

    Article  CAS  Google Scholar 

  18. Hu, W., Guo, Y., Tian, J. & Chen, L. Energy and water saving potentials in industrial parks by an infrastructure-integrated symbiotic model. Resour. Conserv. Recycl. 161, 104992 (2020).

    Article  Google Scholar 

  19. Xi calls for bolstering confidence, jointly addressing global challenges at UNGA. Xinhua (21 September 2021); http://english.www.gov.cn/news/topnews/202109/22/content_WS614a816dc6d0df57f98e0a56.html

  20. Guidelines on Facilitating the Wastewater Reuse (National Development and Reform Commission of China, Ministry of Science and Technology of China, Ministry of Industry and Information Technology of China et al. 2021); https://www.ndrc.gov.cn/xwdt/tzgg/202101/t20210111_1264795_ext.html

  21. Plans for Facilitating Co-combustion of Coal and Biomass (National Energy Administration of China, Ministry of Environmental Protection of China, 2017); http://zfxxgk.nea.gov.cn/auto84/201712/t20171204_3065.htm

  22. Announcement of Pilot Projects for Co-combustion of Coal and Biomass (National Energy Administration of China, Ministry of Ecology and Environment of China, 2018). http://drc.gd.gov.cn/gkmlpt/content/1/1060/post_1060827.html#830

  23. Guo, S., Huang, H., Dong, X. & Zeng, S. Calculation of greenhouse gas emissions of municipal wastewater treatment and its temporal and spatial trend in China. Water Wastewater Eng. 45, 56–62 (2019).

    CAS  Google Scholar 

  24. Zhang, C. et al. Field test and numerical simulation for co-combustion of sludge in a 100 MW coal fired boiler. J. Combust. Sci. Technol. 21, 114–123 (2015).

    Google Scholar 

  25. Guo, Y., Tian, J., Chertow, M. & Chen, L. Greenhouse gas mitigation in Chinese eco-industrial parks by targeting energy infrastructure: a vintage stock model. Environ. Sci. Technol. 50, 11403–11413 (2016).

    Article  CAS  Google Scholar 

  26. Nordhaus, W. Estimates of the social cost of carbon: concepts and results from the DICE-2013R model and alternative approaches. J. Assoc. Environ. Resour. Econ. 1, 273–312 (2014).

    Google Scholar 

  27. Luo, T. & Hu, J. Techno-economic analysis of reclaimed water pipeline materials. Shanxi Archit. 40, 132–133 (2014).

    Google Scholar 

  28. Code for Design of Thermal Power Plant (GB50660-2011) (Ministry of Housing and Urban-Rural Development of China, 2011).

  29. Cui, R. Y. et al. A plant-by-plant strategy for high-ambition coal power phaseout in China. Nat. Commun. 12, 1468 (2021).

    Article  CAS  Google Scholar 

  30. Standards for Construction of Municipal Wastewater Treatment Projects (Ministry of Housing and Urban-Rural Development of China, 2001).

  31. Wang, P. Incineration and disposal of dehydrated sludge from municipal wastewater treatment plants. Sci. Technol. Vision 11, 227–228 (2020).

    CAS  Google Scholar 

  32. Li, D. et al. Investigation and application of sewage sludge co-combustion in a 300 MW coal-fired boiler. Zhejiang Electr. Power 38, 109–114 (2019).

    CAS  Google Scholar 

  33. Liu, Y., Teng, J., Su, Y., Kang, J. & Zhang, Y. Research on pollutants emitted from dried sludge blending combustion in coal-powder boiler. Chin. J. Environ. Eng. 8, 4969–4976 (2014).

    CAS  Google Scholar 

  34. Hao, X., Chen, Q., Li, J. & Jiang, H. Unnecessary worry about pollutants in off-gases of sludge incineration. China Water Wastewater 35, 8–14 (2019).

    Google Scholar 

  35. Statistical Data of Electricity Industry Development 2016 (China Electricity Council, 2017); http://www.chinayearbook.com/yearbook/item/1/197766.html

  36. Basic Information Tables for 600 MW-level Thermal Power Generating Units (China Electricity Council, 2012); http://www.chinapower.com.cn/kjfwduibiao/20160422/4817.html

  37. Basic Information Tables for 100–225 MW-level and 300 MW-level Thermal Power Generation Units (China Electricity Council, 2013); http://www.chinapower.com.cn/kjfwduibiao/20160422/4824.html

  38. Lists of Desulfurization and Denitrification Facilities of Coal-fired Power Generation Units (Ministry of Environmental Protection of China, 2014); https://www.mee.gov.cn/gkml/hbb/bgg/201407/t20140711_278584.htm

  39. Manual of Power Generation Units in China (China Electricity Council, 2013).

  40. Catalog of Municipal Wastewater Treatment Plants in 2014 (Ministry of Environmental Protection of China, 2015); https://www.mee.gov.cn/gkml/hbb/bgg/201506/t20150609_303209.htm

  41. Manual of Industrial Pollution Source Coefficients (Ministry of Environmental Protection of China, 2010).

  42. Manual for Pollutant Emission Accounting Methods and Emission Factors (Ministry of Ecology and Environment of China, 2021); https://www.mee.gov.cn/xxgk2018/xxgk/xxgk01/202106/t20210618_839512.html

  43. Liu, F. et al. High-resolution inventory of technologies, activities, and emissions of coal-fired power plants in China from 1990 to 2010. Atmos. Chem. Phys. 15, 13299–13317 (2015).

    Article  CAS  Google Scholar 

  44. Zhang, C., Zhong, L., Fu, X., Wang, J. & Wu, Z. Revealing water stress by the thermal power industry in China based on a high spatial resolution water withdrawal and consumption inventory. Environ. Sci. Technol. 50, 1642–1652 (2016).

    Article  CAS  Google Scholar 

  45. IPCC Climate Change 2013: The Physical Science Basis (eds Stocker, T. F. et al.) (Cambridge Univ. Press, 2013).

  46. Baidu Map Open Application Programming Interface (Baidu, 2022); https://lbsyun.baidu.com/

  47. Code for Urban Water Supply Engineering Planning (GB50282-2016) (Ministry of Housing and Urban-Rural Development of China, 2016).

  48. Pilot Scheme of Water Resource Tax Reform (Ministry of Finance of China, State Taxation Administration of China, Ministry of Water Resources of China, 2016); http://www.chinatax.gov.cn/n810341/n810755/c2132428/content.html

  49. Rebitzer, G. et al. Life cycle assessment, part 1: framework, goal and scope definition, inventory analysis, and applications. Environ. Int. 30, 701–720 (2004).

    Article  CAS  Google Scholar 

  50. ISO 14040:2006 Environmental Management—Life Cycle Assessment—Principles and Framework (International Standardization Organization, 2006); https://www.iso.org/obp/ui#iso:std:iso:14040:ed-2:v1:en

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Acknowledgements

L.C., J.T., Y.G., W.H. and Y.L. acknowledge the National Natural Science Foundation of China number 41971267 and National Social Science Foundation of China number 18ZDA046. D.L.M. acknowledges funding from the Ma Huateng Foundation to Princeton University. Y.G. acknowledges the support from the Schmidt Science Fellows in partnership with the Rhodes Trust. The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript.

Author information

Authors and Affiliations

Authors

Contributions

Y.G., D.L.M., J.T. and L.C. conceived the research idea and designed the study; Y.G., Y.L. and W.H. compiled the geodatabase on China’s coal power plants and wastewater treatment plants and the distance matrix between them; Y.G. designed the scenarios and optimization algorithm; Y.G. conducted the life-cycle assessment and cost–benefit analyses; Y.L. and W.H. contributed to the assessment framework and engineering analyses; Y.G., D.L.M., J.T. and L.C. analysed the results; Y.G., D.L.M. and L.C. wrote the paper with contributions from all authors.

Corresponding authors

Correspondence to Denise L. Mauzerall or Lyujun Chen.

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Nature Sustainability thanks Kejun Jiang, Chao Zhang and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.

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Supplementary information

Supplementary Information

Supplementary Notes 1–2, Figs. 1–5, Tables 1–9 and References.

Reporting Summary

Supplementary Data

Source data for supplementary figures and the inventory of coal power and wastewater treatment plants.

Source data

Source Data Fig. 1

Detailed provincial-level results.

Source Data Fig. 2

Detailed grid-level results.

Source Data Fig. 3

Detailed provincial-level results.

Source Data Fig. 4

Detailed linkage-level results.

Source Data Fig. 5

Detailed linkage-level results.

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Guo, Y., Mauzerall, D.L., Lyu, Y. et al. Benefits of infrastructure symbiosis between coal power and wastewater treatment. Nat Sustain (2022). https://doi.org/10.1038/s41893-022-00963-z

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