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The chemical industry plays a crucial role in strengthening the manufacturing sector of China, and chemical industrial parks are key platforms for new industrialization. Chemical industrial parks encounter numerous challenges in mitigating pollution and carbon emissions, encompassing issues such as a low resource-utilization rate, deficient recycling practices, substantial costs associated with end-of-pipe pollution control, and escalated safety and environmental risks. This study investigates collaborative pathways for pollution reduction and carbon mitigation within chemical industrial parks. According to the characteristics and research progress of carbon emissions and pollution generation, the implications of carbon reduction synergies are analyzed. A comprehensive analytical framework is established for general industrial processes, covering material metabolic processes in enterprise production, symbiotic metabolism in industrial parks, and material metabolism in park infrastructure. Moreover, specific technical pathways for pollution reduction and carbon mitigation are proposed: (1) establishing a comprehensive inventory of carbon and pollutant emissions; (2) integrating and optimizing the technological and industrial structures of chemical industrial parks through the development of green production technologies, symbiotic upgrades in infrastructure, enhanced inter-enterprise cooperation, coordinated efforts in pollution reduction,carbon mitigation, and safety production, and optimization of product-industry-space structures; and (3) conducting a cost-benefit analysis of pollution reduction and carbon mitigation technology pathways through a life cycle assessment. Employing the Hangzhou Bay Shangyu Economic and Technological Development Zone as a case study, an empirical analysis of pollution reduction and carbon mitigation technology pathways is undertaken. Furthermore, recommendations are made from three perspectives: improving precision measurement systems to strengthen material flow management in chemical industrial parks, reinforcing symbiotic links through systems engineering to empower pollution reduction and carbon mitigation, and stimulating systemic efficiency reforms for the green and high-quality development of chemical industrial parks.

The provisions of industrial water pollution prevention and control have been well implemented since the newly revised Law of the People’s Republic of China on Prevention and Control of Water Pollution was issued on January 1, 2018. The national policies and facility construction related to industrial water pollution prevention and control have achieved significant progress. National departments and provinces have issued over 60 related policies and regulations. Outdated production facilities were eliminated to actively promote cleaner production, and over 1400 centralized sewage treatment facilities were constructed in industrial agglomeration areas. However, investigation and evaluation indicate that the progress in the implementation of some legal provisions and the control of industrial water pollution is slow. Moreover, the implementation of provisions between regions and industries is imbalanced, excessive discharge of pollution occurs, and the regulatory capacity to support new national/local emission standards is insufficient. We suggest that entire-process control should be conducted over industrial water pollution while focusing on cleaner production, and drainage indicators should be optimized to further promote environmental information disclosure.

As China's environmental protection emission standards are becoming stricter and industrial parks are taking shape, problems such as the lack of stable cooperative treatment technology for toxic pollutants and carbon emission reduction, and the high control cost seriously restrict the sustainable development of economic society and the realization of the strategic goal of carbon emission reduction. Guided by the major environmental protection demand of industries, this study put forward the method, strategy and scientific basis of "Synergistic reduce pollution and carbon in the whole process of industry". Through the coordination of control methods, cross-media, multi-field and multi-factor modeling optimization, the creative discovery of basic science at molecular level was directly linked with engineering research, which provided new scientific support for the synergy reduction of pollution and carbon emission, and contributed theoretical methods to China's industrial green development. [ABSTRACT FROM AUTHOR]

The spatial distributions of porosity and fractional dimension of autotrophic and heterotrophic/autotrophic biofilms applied by direct current in the range of 0-25 A/m2 were investigated by using the micro-slicing technique and image analysis. The results showed that the porosities of the autotrophic and heterotrophic/autotrophic biofilms respectively decreased from ca. 92% and 96% in the top layer to ca. 54% in the bottom layer while the fractional dimensions increased from 1.1 and 1.05 in the top layer to 1.4 in the bottom layer in the absence of current. The increase in the current density decreased the porosities and increased the fractional dimensions in the top layers. In the deeper layers, the current had insignificant influence on the porosity and fractional dimension.