保存温度及时间对厌氧氨氧化污泥活性的影响

通过改变保存温度和时间,研究了厌氧氨氧化污泥活性的变化规律以及污泥活性恢复能力.结果表明,保存温度、时间对厌氧氨氧化污泥活性影响显著.常温(15±2)℃、低温(5±2)℃对厌氧氨氧化污泥活性影响较小,而中温(30±2)℃、冷冻(-20±2)℃都会使其活性大幅降低,甚至消失.在保存的前30d厌氧氨氧化污泥活性迅速下降,然后趋于缓慢.根据衰减指数模型推出常温状态下衰减指数为0.0324,相对于其他温度最小.并根据保存温度、时间对其影响的特点提出了合适的保存方法,使得厌氧氨氧化污泥的活性能够在较短时间内得到恢复.

Effect of preservation temperature and time on ANAMMOX sludge activity

Variation of the activity of the ANAMMOX bacteria and its recovery were investigated by preserving the ANAMMOX sludge under different temperature and time. The preserving temperature and time had obvious effect on the activity of the ANAMMOX bacteria. The effect of normal temperature (15±2)℃ and low temperature (5±2)℃ on the activity was little, the activity sharply decreased, or even lost, under moderate temperature (30±2)℃ and freezing (-20±2)℃ temperature. The rapid reduction of the activity was observed before 30d, and then it kept constant relatively until the end. According to damped exponential model, the damped exponential was 0.0324 under normal temperature, indicating that it was less than that under other temperatures. The paper also lists preserving ways according to the impact of the preserving temperature and time, to make sure the sludge activity recovery in very short time.