Impact of moisture regulation methods on the fish manure composting process and gas emissions

IF 7.3 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2026-03-01 Epub Date: 2026-01-07 DOI:10.1016/j.eti.2026.104748

Ke Liu , Kai Zhang , Ping Li , Xiuli Wei , Ning Tang , Xuemeng Huang

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引用次数: 0

Abstract

Industrial Recirculating Aquaculture Systems (IRAS) excel at both wastewater treatment and the conversion of wastewater into usable resources, thereby offering vital support for the sustainable advancement of aquaculture. In this study, we aimed to identify suitable moisture regulation methods for composting of fish manure from IRAS. Seven treatment groups were established to investigate the effects of moisture regulation strategies: no water replenishment (T1), tap water replenishment (T2), compost leachate replenishment (T3), hydrothermal liquid replenishment (T4), and their combinations with hydrochar (T5-T7). Results show that the T6 treatment (compost leachate + hydrochar) performed optimally. In addition to increasing microbial diversity, it prolonged the high-temperature phase of composting to 12 days, enhanced compost water stability, and resulted in a seed germination index of 87.72 %. Additionally, T6 significantly reduced emissions of greenhouse gases (N₂O and CH₄) and ammonia (NH₃). The incorporation of hydrochar effectively delayed the transition of capillary water to free water, and enhanced the overall stability of the reactor. In conclusion, the combination of compost leachate and hydrochar is an efficient and environmentally friendly method for regulating the moisture content of fish manure compost. Our study provides a theoretical basis and technical support for the resource utilization of fish manure.

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水分调节方法对鱼粪堆肥过程和气体排放的影响

工业循环水养殖系统（IRAS）在废水处理和将废水转化为可用资源方面表现出色，从而为水产养殖的可持续发展提供了至关重要的支持。在本研究中，我们的目的是确定合适的水分调节方法的堆肥从IRAS鱼粪。试验设置不补水（T1）、自来水补水（T2）、堆肥渗滤液补水（T3）、热液补水（T4）及其与水炭（T5-T7）组合7个处理组，研究水分调节策略的效果。结果表明，T6处理（堆肥渗滤液+水炭）效果最佳。除增加微生物多样性外，将堆肥高温期延长至12天，提高了堆肥水稳定性，种子萌发指数为87.72 %。此外，T6显著减少了温室气体（N2O和CH4）和氨（NH3）的排放。烃类的掺入有效延缓了毛细管水向自由水的过渡，提高了反应器的整体稳定性。综上所述，堆肥渗滤液与水炭相结合是一种高效环保的调节鱼粪堆肥含水率的方法。本研究为鱼粪资源化利用提供了理论依据和技术支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.