The effect of fermentation method, microbes inoculation and carbon source proportion on the quality of organic fertilizer made from liquid wastes of chicken slaughterhouse

Abstract

This study was to examine the effect of fermentation, inoculation, and the proportion of carbon sources on the quality of organic fertilizer made from fermentation of liquid waste collected from chicken slaughterhouse in Jakarta area. The parameters being tested included fermentation, microbial inoculation, and carbon source proportion. The observations were made after three weeks of fermentation on the color, odor, pH, contents of elements C, NH4, NO3, total-N, P2O5, K2O and pathogenic microbes (Fusarium sp., Coletotrichum sp., Salmonella sp. and Eschercia coli). The fertilizer were implemented for green Chinese cabbage in six locations. It was found that the aerobic fermentation system combined with inoculation of the decomposer microbes (Lactobacillus spp.) and the addition 20% (v/v) of a carbon source was the most appropriate method of fermentation in the production of liquid organic fertilizers from liquid waste of chicken slaughterhouse. The quality of the fertilizer which is based on physical, chemical and biological characteristics and crop responses still less than the similar commercial fertilizer (EM4). Nevertheless, the nitrogen and phosphor contents of this liquid fertilizer (92,000 ppm and 143,000 ppm) were significantly higher (P<0.05) than the EM4 (0.07 and 3.22 ppm).