Effect of Bioactive Water on the Biodegradation of Naphthalene Contaminated Soil

In this experiment, the strain NW6 with good growth of naphthalene as the sole carbon source and energy source was screened from petroleum contaminated soil after isolation and purification by enrichment culture. The influencing factors of strain were studied. The results showed that the optimum growth conditions for strain NW6 were pH 8, 40 degrees C. In the contaminated soil for sand, loess and black soil, the degradation rate of naphthalene by NW6 was 28.05%, 24.35% and 21.34% respectively. Adding bioactive water, the degradation rate was increased compared with distilled water. The enhanced rates of BW against strain NW6 in three naphthalene contaminated soils were respectively: sand 83.28%, loess 103.56%, black soil 60.40%. It showed that the bioactive water could promote the degradation of microorganisms.