期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 314, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2022.115135
关键词
Life cycle assessment; Water-based drilling cuttings; Cement; Brick; Recycling; Life cycle assessment; Water-based drilling cuttings; Cement; Brick; Recycling
资金
- Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance [2020CX020300]
This study conducted a life cycle assessment to determine the environmental impacts of three recycling pathways (cement, sintered bricks, and non-sintered bricks) for water-based drilling cuttings. The results showed that the cement pathway had the highest environmental impact index, while the sintered brick pathway had the lowest. Strategies for reducing emissions and conserving energy were proposed based on the assessment.
This study determined the environmental impacts of three recycling pathways for water-based drilling cuttings (WDC), namely cement, sintered bricks, and non-sintered bricks, based on the life cycle assessment (LCA) method. A life cycle inventory was developed with based on the resource utilization of 1t drilling cuttings as the functional unit, and a sensitivity analysis was conducted to identify the essential materials and energy consumption. The results showed that the sequence of the environmental impact index for the three recycling pathways was cement, non-sintered brick and sintered brick. Primary energy demand and direct emissions were the main reasons for this difference. Direct emissions, electricity, and binder were the largest contributors to the inventory of cement, sintered bricks, and non-sintered bricks, accounting for 54%, 33.4%, and 62.1% of the environmental impact burden, respectively. Furthermore, a 5% reduction in direct emissions, electricity, and binder decreased the integrated impact index by approximately 2.67%, 3.04%, and 3.38% for cement, sintered bricks, and non-sintered bricks, respectively. Based on the LCA results, strategies for reducing emissions and conserving energy were proposed. These results provide a useful reference for creating a sustainable system for recycling water-based drilling cuttings.
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