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Anaerobically digested poultry slaughterhouse wastes as fertiliser in agriculture

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalBioresource Technology
Volume78
Issue number1
DOIs
Publication statusPublished - 2001
Externally publishedYes
Publication typeA1 Journal article-refereed

Abstract

Chemical and physical analysis, 27-d plant growth assays with carrot (Daucus carota) and Chinese cabbage (Brassica campestris var. chinensis), and 5-d phytotoxicity assays with Chinese cabbage and perennial ryegrass (Lolium perenne) were used to investigate the suitability of anaerobically digested poultry slaughterhouse waste for fertiliser in agriculture and the effect of aerobic post-treatment on the properties of the digested material.The digested material appeared to be rich in nitrogen. In 27-d assays with digested material as nitrogen source, carrots grew almost as well as those fertilised with a commercial mineral fertiliser used as reference, whereas, the growth of Chinese cabbage was inhibited. In further 5-d phytotoxicity assays, the digested material inhibited the germination and root growth of ryegrass and Chinese cabbage, apparently because of organic acids present in it. Aerobic post-treatment of the material reduced its phytotoxicity but, probably due to the volatilisation of ammonia, resulted in loss of nitrogen.

Keywords

  • Aerobic post-treatment, Ammonia, Anaerobically digested material, Organic acids, Phytotoxicity assays, Plant growth assays, Poultry slaughterhouse waste