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Microbiological quality of poultry manure used in market gardening in South Benin and impacts on the hygiene of Lactuca sativa leaves

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Research Paper 01/11/2017
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Microbiological quality of poultry manure used in market gardening in South Benin and impacts on the hygiene of Lactuca sativa leaves

Mêdessou Armande Boko, Tamègnon Victorien Dougnon, Honoré Sourou Bankolé, Biowa Mardochée Sewaï, Claude Ahouangninou, Placide Cledjo
Int. J. Biosci.11( 5), 166-175, November 2017.
Certificate: IJB 2017 [Generate Certificate]
Key: Aerobic compostingAnaerobic DigestionLactuca sativaPoultry manure

Abstract

The composting of animal waste, particularly poultry manure, contributes to their hygienization and makes it possible to obtain fertilizers of satisfactory microbiological quality for agriculture. There are two types of composting, namely aerobic composting and anaerobic composting. The main objective of this research is to study the evolution of the pathogenic microbial load of poultry manure respectively after aerobic composting and anaerobic digestion. To do this, poultry manure collected on a farm in South was treated by the two composting processes. Then, the two types of humus obtained was used in parallel with the raw manure for the culture of Lactuca sativa (lettuces).To measure the effectiveness of both processes, samples of the raw manure and the humus obtained after composting were analyzed in the laboratory for the detection of mesophilic aerobic germs (GAMs), Escherichia coli, coagulase-positive Staphylococcus, Clostridium perfringens and Salmonella spp. Samples of lettuces were also analyzed. Escherichia coli loading decreased by more than 90% at the end of both processes, aerobic composting was particularly more effective than anaerobic digestion. At the opposite, the loads of coagulase-positive Staphylococcus and Clostridium perfringens increased significantly at the end of the two processes. The results showed that the composting of the manure before its use as a fertilizer for the cultivation of Lactuca sativa helped to obtain lettuces of better microbiological quality.

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