Scholarlink

<p>Cities often treat solid waste and wastewater separately, missing the opportunity for resource integration. Diverting food waste into sewage streams offers a holistic solution but lacks city-scale evaluation. Here we developed the urban biowaste flux model integrating mechanistic bioprocesses with life-cycle assessment for quantifying material flows, energy use, costs and greenhouse gas emissions based on city-specific waste composition, treatment parameters and tariffs. We validated urban biowaste flux against detailed data from Hong Kong and applied it to 28 large cities worldwide. Our results revealed a linear rise in net costs with food waste moisture and identify a moisture threshold of about 50 kg per capita per year at which sewer integration becomes cost-effective. Optimized treatment strategies could cut overall emissions for targeted cities by up to 69% versus current separate treatment systems. Overall, the urban biowaste flux model offers policymakers a practical tool for designing sustainable and locale-specific waste management strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Redefining separate or integrated food waste and wastewater streams for 29 large cities

  • 期刊论文

  • 发表日期：

    2025年11月6日

查看全文
  • Xu Zou,
  • Zi Zhang,
  • Chengyu Xiao,
  • Liezhong Fan,
  • Yifeng Feng,
  • Hongxuan Wang,
  • Jiayan Deng,
  • Chukuan Jiang,
  • Feixiang Zan,
  • Hongxiao Guo,
  • Guanghao Chen

摘要

Cities often treat solid waste and wastewater separately, missing the opportunity for resource integration. Diverting food waste into sewage streams offers a holistic solution but lacks city-scale evaluation. Here we developed the urban biowaste flux model integrating mechanistic bioprocesses with life-cycle assessment for quantifying material flows, energy use, costs and greenhouse gas emissions based on city-specific waste composition, treatment parameters and tariffs. We validated urban biowaste flux against detailed data from Hong Kong and applied it to 28 large cities worldwide. Our results revealed a linear rise in net costs with food waste moisture and identify a moisture threshold of about 50 kg per capita per year at which sewer integration becomes cost-effective. Optimized treatment strategies could cut overall emissions for targeted cities by up to 69% versus current separate treatment systems. Overall, the urban biowaste flux model offers policymakers a practical tool for designing sustainable and locale-specific waste management strategies.