The government of Indonesia has pledged to meet ambitious greenhouse gas mitigation goals in its Nationally Determined Contribution as well as reduce water pollution through its water management policies. A set of technologies could conceivably help achieving these goals simultaneously. However, the installation and widespread application of these technologies will require knowledge on how governance affects the implementation of existing policies as well as cooperation across sectors, administrative levels, and stakeholders. This paper integrates key governance variables--involving enforcement capacity, institutional coordination and multi-actor networks--into an analysis of the potential impacts on greenhouse gases and chemical oxygen demand in seven wastewater treatment scenarios for the fish processing industry in Indonesia. The analysis demonstrates that there is an increase of 24% in both CH₄ and CO₂ emissions between 2015 and 2030 in the business-as-usual scenario due to growth in production volumes. Interestingly, in scenarios focusing only on strengthening capacities to enforce national water policies, expected total greenhouse gas emissions are about five times higher than in the business-as-usual in 2030; this is due to growth in CH₄ emissions during the handling and landfilling of sludge, as well as in CO₂ generated from the electricity required for wastewater treatment. In the scenarios where there is significant cooperation across sectors, administrative levels, and stakeholders to integrate climate and water goals, both estimated chemical oxygen demand and CH₄ emissions are considerably lower than in the business-as-usual and the national water policy scenarios.

印度尼西亚政府已承诺在其国家自主贡献中实现宏伟的温室气体减排目标，并通过其水管理政策减少水污染。可以想象，一组技术可以帮助同时实现这些目标。但是，这些技术的安装和广泛应用将需要了解治理如何影响现有政策的实施以及跨部门，行政级别和利益相关者之间的合作的知识。本文将关键治理变量（涉及执法能力，机构协调和多参与者网络）整合在一起，分析了印度尼西亚鱼品加工业在七个废水处理方案中对温室气体和化学需氧量的潜在影响。₄周CO ₂ 2015和2030之间的排放在业务照常方案由于在生产量的增长。有趣的是，在仅侧重于加强执行国家水政策的能力的情况下，预期的温室气体总排放量将比2030年的正常水平高约五倍；这是由于污泥处理和填埋过程中CH ₄排放的增加，以及废水处理所需电力产生的CO _2的增加。在跨部门，行政级别和利益相关者进行大量合作以整合气候和水目标的方案中，估算的化学需氧量和CH ₄ 排放量大大低于常规情况和国家水政策情景。