Department of Mineral Resources and Energy Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Viet Nam.
Waste Manag. 2021 Feb 15;121:175-185. doi: 10.1016/j.wasman.2020.12.013. Epub 2020 Dec 25.
This study has attempted to ascertain the linkages between circular bio-economy (CirBioeco) and recycling of electronic (e-)waste by applying microbial activities instead of the smelter and chemical technologies. To build the research hypothesis, the advances on biotechnology-driven recycling processes for metals extraction from e-waste has been analyzed briefly. Thereafter, based on the potential of microbial techniques and research hypothesis, the structural model has been tested for a significance level of 99%, which is supported by the corresponding standardization co-efficient values. A prediction model applied to determine the recycling impact on CirBioeco indicates to re-circulate 51,833 tons of copper and 58 tons of gold by 2030 for the production of virgin metals/raw-materials, while recycling rate of the accumulated e-waste remains to be 20%. This restoration volume of copper and gold through the microbial activities corresponds to mitigate 174 million kg CO emissions and 24 million m water consumption if compared with the primary production activities. The study potentially opens a new window for environmentally-friendly biotechnological recycling of e-waste under the umbrella concept of CirBioeco.
本研究试图通过应用微生物活动来确定循环生物经济（CirBioeco）与电子废物回收之间的联系，而不是采用冶炼厂和化学技术。为了建立研究假设，简要分析了应用生物技术驱动的从电子废物中提取金属的回收工艺的进展。此后，基于微生物技术的潜力和研究假设，对结构模型进行了测试，置信水平为 99%，相应的标准化系数值也支持这一结果。应用于确定对 CirBioeco 的回收影响的预测模型表明，到 2030 年，将通过微生物活动再循环 51833 吨铜和 58 吨金，用于生产原始金属/原材料，而累积电子废物的回收利用率仍保持在 20%。如果与初级生产活动相比，通过微生物活动回收的这部分铜和金的数量相当于减少了 1.74 亿公斤二氧化碳排放和 2400 万立方米的水消耗。本研究为在 CirBioeco 的总体概念下进行环保的电子废物生物技术回收开辟了新的途径。
