Abstract:

The effects of polyepoxysuccinic acid（PESA），phosphorus，ventilation，initial amount of heterotrophic bacteria and pH value on the growth of heterotrophic bacteria in the water using PESA as a water treatment agent were studied by the flat-dish numeration method. The results showed that PESA had little influence on the breeding of heterotrophic bacteria at a low concentration，while it promoted the growth rate of heterotrophic bacteria as its concentration increased. The higher the concentration of phosphate，the more the amount of heterotrophic bacteria in the stable breeding period. Ventilation had no effect on the growth of heterotrophic bacteria. The initial amount of heterotrophic bacteria had little influence on the amount during the balance period. The pH value had a significant impact on the breeding of heterotrophic bacteria.