浙江农业学报 ›› 2024, Vol. 36 ›› Issue (10): 2308-2315.DOI: 10.3969/j.issn.1004-1524.20230803

• 环境科学 • 上一篇    下一篇

牛粪蚯蚓堆肥条件优化与堆制物的性状变化

吴雨珂(), 王峰, 王依凡, 吴雪萍, 朱维琴*()   

  1. 杭州师范大学 生命与环境科学学院,浙江 杭州 311121
  • 收稿日期:2023-06-29 出版日期:2024-10-25 发布日期:2024-10-30
  • 作者简介:吴雨珂(1998—),女,广东梅州人,硕士研究生,研究方向为重金属污染控制与固体废弃物资源化利用。E-mail:wyk2021@stu.hznu.edu.cn
  • 通讯作者: *朱维琴,E-mail:zhwq@hznu.edu.cn
  • 基金资助:
    浙江省公益技术应用研究项目(LGN22B070002)

Parameters optimization for vermicomposting of cow dung and changes of properties of composting residues

WU Yuke(), WANG Feng, WANG Yifan, WU Xueping, ZHU Weiqin*()   

  1. School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
  • Received:2023-06-29 Online:2024-10-25 Published:2024-10-30

摘要:

蚯蚓堆肥是畜禽粪污资源化利用的方式之一。该研究以牛粪为主料,辅以不同添加剂于蚯蚓反应器中,采用L16(44+32)正交设计优化牛粪蚯蚓堆肥的生产条件,研究所获堆制物基本理化性状及其对Pb2+和Cd2+吸附性能的变化。结果表明,米糠和EM菌剂可促进蚯蚓生长繁殖,并能改善堆制物的理化性质。在牛粪蚯蚓反应器中添加生物炭、鸟粪石和贝壳粉具有可行性,且以经鸟粪石处理后的堆制物对Pb2+和Cd2+的吸附效果最优,吸附率分别可达96.50%和49.95%。牛粪蚯蚓反应器的优化配方为: 以牛粪、米糠、EM菌剂(7∶3∶1的质量比混合)为主料,添加4%的鸟粪石或生物炭,调节含水率至70%~80%,每150 g干基接种12条蚯蚓,堆肥40 d。研究结果可为畜禽粪便的资源化利用和安全阻控土壤中的Pb2+、Cd2+迁移提供科学依据。

关键词: 蚯蚓堆肥, EM菌剂, 鸟粪石, 生物炭, 重金属

Abstract:

Vermicomposting is one of the ways to utilize livestock and poultry manure resources. In this study, cow dung was used as the main material, supplemented with different additives in the vermicompost reactor. The suitable parameters were optimized for the production of vermicompost by using the L16 (44+32) orthogonal design, and further study was conducted to reveal the changes of physicochemical properties and adsorption properties on Pb2+ and Cd2+ of the composting residues. The results showed that both rice bran and the effective microorganisms (EM) bacterial agent could promote the growth and reproduction of earthworms, and improve the physicochemical properties of the derived composting residues. It was feasible to add biochar, struvite and shell powder into the cow dung vermicompost reactor. The best adsorption effect for Pb2+ and Cd2+ was found in the derived composting residues from cow dung vermicompost reactor with struvite addition, and their adsorption rates reached up to 96.50% and 49.95%, respectively. The optimized parameters for the cow dung vermicomposting were as follows: the mixture of cow dung, rice bran and EM bacterial agent at the mass ratio of 7∶3∶1 was used as the main material, supplemented with 4% (mass fraction) struvite or biochar, with the moisture content of 70%-80%, inoculated with 12 earthworms based on 150 g dry substrate, and vermicomposted for 40 days. The present study could provide scientific basis for the utilization of livestock and poultry manure, and the prevention of the migration of Pb2+ and Cd2+ in the soil.

Key words: vermicomposting, effective microorganism (EM) bacterial agent, struvite, biochar, heavy metal

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