腐殖质对堆肥中高效降解菌的吸附与传输影响

The influence of humus on the adsorption and transportation of high effect degradation bacteria in the compost

以铜绿假单胞菌和枯草芽孢杆菌为对象,通过序批实验和柱淋洗实验考察了堆肥介质中的腐殖质含量对细菌的吸附、传输性能的影响.结果表明,随着堆肥介质中腐殖质含量从0.21mg/g增至4.38mg/g,两种细菌在堆肥颗粒中的吸附系数均呈现降低趋势,降幅分别为24.9%和22.7%;2种细菌的穿透率均明显提高,最大穿透率铜绿假单胞菌从0.141提高到0.234,枯草芽孢杆菌从0.254提高到0.348.说明,堆肥介质中腐殖质的存在能够减弱两种高效细菌的吸附性能,促进其在堆肥介质中的传输分散,且腐殖质含量越高,效果越好.

The influence of humus content in compost medium on the adsorption and transportation properties of bacteria was inspected with pseudomonas aeruginosa AB93066 and bacillus subtilis AB92006 as objects, through order bacted and column drip washing experiments. That adsorption coefficients of these two bacteria in composting granules all tended to decrease with the range of 24.9% and 22.7%, respectively; and their penetration rate raised obviously, with greatest rate of pseudomonas aeruginosa increased from 0.141 to 0.234 and the rate of bacillus subtilis increased from 0.254 to 0.348, explaining that the existence of humus in composting medium could weaken the adsorption properties of these two high effect bacteria, and promote their transportation dispersion in the compost medium; and also the higher the humus content, the better the effect.