Species-specific vermicomposting of dairy processing sludge: optimized pre-composting, comparative earthworm performance, and life cycle assessment

IF 3.8 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Material Cycles and Waste Management Pub Date : 2026-08-25 DOI:10.1007/s10163-026-02704-2

Jyotishikha Mohapatra, Ramesh Kumar, Jayato Nayak, Shirsendu Banerjee, Bisheswar Karmakar, Amrita Mishra, Moonis Ali Khan, Sankha Chakrabortty, Suraj K Tripathy, Byong-Hun Jeon

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Abstract

In this study, vermistabilization of dairy processing sludge (DPS) was performed by mixing with cattle dung (CD) in 1:1 ratio and subjecting it to varying pre-composting periods of 7 days to 35 days for the three earthworm species, Eisenia fetida (E.F), Eudrilus eugeniae (E.E), and Perionyx excavatus (P.E). Pre-composting times of 3 weeks (DPS_21E.F), 2 weeks (DPS_14E.E), and 3 weeks (DPS_21P.E) gave optimal results for all three earthworms’ growth, reproduction, and composting efficiency in terms of total Kjeldahl nitrogen, total available phosphorus, and total potassium for the three species. E.F was found to have the most effective soil-builder capacity, which contributed to a higher seed germination index, 193% for Vigna radiata (mung bean), 197% for Raphanus sativus (radish), and 193% for Cucurbita pepo (pumpkin). LCA showed that vermicompost treatments resulted in climate change impacts of approximately 265, 272, and 276 kg CO₂-eq for E.F, E.E, and P.E, respectively, compared to approximately 415 kg CO₂-eq for synthetic urea. Terrestrial acidification impacts ranged from approximately 10.86–10.90 kg SO₂-eq for vermicompost treatments, whereas the urea system exhibited the highest impact at approximately 11.03 kg SO₂-eq, with additional contributions from natural gas–based fertilizer production.

Graphical abstract

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乳品加工污泥的特定种类蚯蚓堆肥：优化预堆肥，比较蚯蚓的性能，和生命周期评估

本研究以乳业污泥（DPS）与牛粪（CD）按1:1的比例混合，并对三种蚯蚓——费Eisenia fetida （E.F）、eudrrilus eugenae （E.E）和Perionyx excavatus （P.E）进行7 ~ 35 d的预堆肥，对DPS进行蠕化处理。预堆肥时间为3周(DPS21E。F)， 2周(DPS14E；E)和3周（DPS21P.E）对三种蚯蚓的生长、繁殖和堆肥效率（总凯氏定氮、总有效磷和总钾）均有最佳效果。结果表明，E.F具有最有效的造土能力，其种子萌发指数较高，绿豆萌发率为193%，萝卜萌发率为197%，南瓜萌发率为193%。LCA表明，蚯蚓堆肥处理对E.F、E.E和P.E的气候变化影响分别约为265、272和276 kg co2当量，而对合成尿素的影响约为415 kg co2当量。蚯蚓堆肥处理对陆地酸化的影响范围约为10.86-10.90 kg SO2-eq，而尿素系统的影响最大，约为11.03 kg SO2-eq，天然气基肥料生产也有额外的贡献。图形抽象

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来源期刊

Journal of Material Cycles and Waste Management 环境科学-环境科学

CiteScore

5.30

自引率

16.10%

发文量

205

审稿时长

4.8 months

期刊介绍： The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles. The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management. The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).