Article Open Access

Comprehensive Evaluation of Sustainable Treatment Technology of Oily Sludge Based on AHP-FCE

Clean Energy and Sustainability. 2023, 1(1), 10007;
Jiwei Wu 1,    Shifan Zhang 2,    Jian Li 3,    Jiankun Liu 4,    Haocheng Sun 4,    Zixian Jia    Ye Xia 5,    Jie Liu 6,    Dongliang Pan 6,    Jianqiang Sun 6,    Xianzhong Yi 3,    Liang Ma 1, *   
College of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, China
School of Future Technology, China University of Geosciences, Wuhan 430074, China
School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
Dalian Petrochemical Research Institute, Dalian 116045, China
Sinopec Shengli Petroleum Engineering Co., Ltd., Dongying 257000, China
College of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu 610500, China
Authors to whom correspondence should be addressed.

Received: 04 Aug 2023    Accepted: 18 Sep 2023    Published: 07 Oct 2023   


Oil is an unsustainable energy since it is non-renewable. However, oil may not be completely replaced in a short time, so the environmental problems caused by the oil development still require our attention. The oily sludge is a kind of hazardous waste produced during the oil development. To reduce the environmental impact caused by oily sludge, low-carbon and sustainable treatment technologies need to be selected. The incineration, chemical extraction and thermal desorption are common technologies for treatment of oily sludge. We calculated the carbon emissions of these technologies. Then the index evaluation system of oily sludge treatment technology was established with the environmental, economic, social, and technical factors. And the weight of evaluation index was determined by the analytic hierarchy process (AHP). Through the investigation of industry experts, we evaluated the treatment technologies by the fuzzy comprehensive evaluation method (FCE). The results showed that the carbon emissions of incineration are 42.70 t CO2-eq/t which is the highest. Meanwhile, it is 4.80 t CO2-eq/t and 0.10 t CO2-eq/t for chemical extraction and thermal desorption, respectively. The comprehensive scores of incineration, chemical extraction and thermal desorption were 4.59, 5.16 and 4.95, respectively. Therefore, the chemical extraction technology is an optimal treatment technology for oily sludge with the relatively low carbon emission and the highest comprehensive technical score. At the same time, the thermal desorption technology has strong application potential with the lowest carbon emissions. This result provides a reference for achieving clean and sustainable energy development processes.


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