Sawdust is a major waste produced by the wood industry. Adding value to sawdust
through composting is one of the surest means by which environmental pollution
could be minimized. About 500 kg of softwood and hardwood sawdust were
separately mixed with mucuna leaves and kitchen waste in the ratio of 3:1:1 on weight
basis and heaped using effluent from abattoir to develop composts. Objectives of the
study were to monitor changes in the physico-chemical properties, NH4
‒ N, NO3
N, C:N ratio, minerals N, K, P, microbial load and toxic elements in the composts
during a 12 week period. Germination test was also done to evaluate the stability and
maturity of the composts developed. Degradation of softwood sawdust compost
(SSC) was better in the mesophilic phase while that of hardwood sawdust compost
(HSC) occurred in the thermophilic phase. Thus, significantly higher amount of the
organic material in SSC was decomposed during the period as compared to HSC.
Also, greater percentage of the nitrogen in the initial material of SSC was converted
into plant-available inorganic nitrogen (NH4
) than was achieved in HSC.
Hence, most of the mineral nitrogen in HSC that was converted was lost, probably in
the thermophilic phase. On the contrary, the amount of organic nitrogen contained in
the finished composts of both SSC and HSC were adequately good for application to
the soil. Additionally, concentrations of pathogenic microorganisms in SSC and HSC
products were within acceptable limits in terms of toxicity on growing plants. The
softwood sawdust compost was relatively more stable as compared to HSC under the
experimental conditions. Concentrations of heavy metals in both SSC and HSC were
also within acceptable limits that would cause no toxicity to plants. Also, moisture
contents in both SSC and HSC were within the good range (40 - 60%) required for a
good compost. Thus both SSC and HSC produced were of good quality. Further research targeting specific wood species utilised in Ghana would help to identify
composting materials which are readily degradable, as well as those that are toxic to
CDR, C (2021). Composting Of Organically Amended/Treated Hardwood And Softwood Sawdust. Afribary.com: Retrieved April 16, 2021, from https://afribary.com/works/composting-of-organically-amended-treated-hardwood-and-softwood-sawdust
Coalition, CDR. "Composting Of Organically Amended/Treated Hardwood And Softwood Sawdust" Afribary.com. Afribary.com, 05 Apr. 2021, https://afribary.com/works/composting-of-organically-amended-treated-hardwood-and-softwood-sawdust . Accessed 16 Apr. 2021.
Coalition, CDR. "Composting Of Organically Amended/Treated Hardwood And Softwood Sawdust". Afribary.com, Afribary.com, 05 Apr. 2021. Web. 16 Apr. 2021. < https://afribary.com/works/composting-of-organically-amended-treated-hardwood-and-softwood-sawdust >.
Coalition, CDR. "Composting Of Organically Amended/Treated Hardwood And Softwood Sawdust" Afribary.com (2021). Accessed April 16, 2021. https://afribary.com/works/composting-of-organically-amended-treated-hardwood-and-softwood-sawdust