Effects of different amounts of bacterial decomposing promoter on the compost of sawdust and yellow pulp water
[Objective]Using sawdust and yellow pulp water as fermentation materials,the effects of different dosages of bacterial decomposing promoter were investigated on the process of composting.[Method]The aerobic fermentation tank composting experiment was set up,and four treatments were car-ried out,namely,no addition of T0,the additions of decomposing promoter with mass fraction of 0.1%(T1),0.3%(T2),and 0.9%(T3).The composting temperature,pH,GI,and nutrient mass fraction were used as the indexes of evaluation.The effect of the amount of adding decomposing promoter on fermentation pro-cess and maturity was determined by using the principal component analysis,followed by determining the optimum adding amount.[Result]Compared with T0,the treatment with decomposing promoter entered the period of high temperature 2 days earlier.After fermentation,the pH values of each treatment were be-tween 7.46 and 7.74.Adding different mass fractions of decomposing promoter could reduce the carbon and nitrogen losses of compost materials to varying degrees.Compared with T0,the nitrogen loss of T1,T2 and T3 decreased by 9.41%,14.12%and 4.71%,respectively,and the carbon loss decreased by 3.06%,7.97%and 5.89%,respectively.The nitrogen and carbon loss of T2 were the lowest,which were 75.26%and 7.82%,respectively.For all treatments,the maturity of compost increased by 3.64%～9.09%com-pared with T0,among which T2 reached the maturity first.[Conclusion]In summary,the addition of decom-posing promoter with mass fraction of 0.3%in the compost of sawdust and yellow pulp water could signifi-cantly promote the maturity of materials,reduce nitrogen and carbon losses,and improve the quality of com-post,laying a basis for the fertilizer utilization of sawdust and yellow pulp water.
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NSTL
万方数据
维普
