Department of Revitalization and Architecture, Institute of Civil Engineering, Warsaw University of Life Sciences, Nowoursynowska 159, 02 776 Warsaw, Poland.
Graduate School of Environmental Science, Okayama University, 3-1-1, Tsushima-naka, Okayama-city, Okayama 700-8530, Japan.
Sci Total Environ. 2023 Sep 20;892:164349. doi: 10.1016/j.scitotenv.2023.164349. Epub 2023 May 24.
The implementation of circular economy (CE) strategies has facilitated a comprehensive approach to waste management (WM) in university campuses. Composting food waste (FW) and biomass can mitigate negative environmental impacts and be part of a closed-loop economy. The compost can be used as a fertilizer, thereby closing the waste cycle. Implementing nudging strategies to promote effective waste segregation can help the campus move closer towards achieving neutrality and sustainability goals. The research was conducted at the Warsaw University of Life Sciences - WULS (SGGW). The University Campus is located in the south of Warsaw (Poland) and covers an area of 70 ha with 49 buildings. The SGGW campus generates selectively collected (glass, paper, plastic and metals, and biowaste) and mixed waste. Data were collected through a year-long report from the university administration. For the survey, waste data from 2019 to 2022 were obtained. The CE efficiency indicators of CE were measured. The indicators of CE efficiency for compost (Ic,ce) and plastic (I,) showed Ic,ce at 21.05 %, which means that 1/5th of the waste generated on the campus can be introduced into the CE paradigm through composting, and the resulting value I of 19.96 % indicates that this amount can be reintroduced into the CE paradigm through its reuse. The results of the seasonality study showed that there were no statistically significant differences in the generated biowaste between the separated periods of the year, and the Pearson correlation coefficient (r = 0.068) provided additional confirmation. The weak correlation between the amount of biowaste generated and the average for each year (r = 0.110) also indicates a stable biowaste generation system that does not require a reduction or increase in the efficiency of waste processing, such as composting. By implementing CE strategies, university campuses can improve WM practices and achieve sustainability goals.
实施循环经济（CE）战略有助于在大学校园全面开展废物管理（WM）工作。堆肥食物垃圾（FW）和生物质可以减轻负面的环境影响，并成为闭环经济的一部分。堆肥可用作肥料，从而封闭废物循环。实施推动策略以促进有效的废物分类，有助于校园更接近实现中和可持续性目标。研究在华沙生命科学大学（WULS）- SGGW 进行。大学校园位于华沙南部（波兰），占地 70 公顷，有 49 栋建筑。SGGW 校园产生选择性收集（玻璃、纸张、塑料和金属以及生物垃圾）和混合废物。数据通过大学管理部门的年度报告收集。为了进行调查，获得了 2019 年至 2022 年的废物数据。测量了 CE 效率指标的 CE 效率指标。堆肥（Ic,ce）和塑料（I,）的 CE 效率指标表明 Ic,ce 为 21.05%，这意味着校园产生的废物中有 1/5 可以通过堆肥引入 CE 模式，而产生的价值 I 为 19.96%，这意味着可以通过再利用将其重新引入 CE 模式。季节性研究结果表明，在一年的分离期之间，生物垃圾的产生没有统计学上的显著差异，皮尔逊相关系数（r=0.068）提供了额外的确认。生物垃圾产生量与每年平均值之间的弱相关性（r=0.110）也表明，生物垃圾产生系统稳定，不需要减少或增加废物处理效率，如堆肥。通过实施 CE 战略，大学校园可以改善 WM 实践并实现可持续性目标。
