原生污水源热泵对污水生化处理的影响

Effect of untreated sewage source heat pump on biochemical sewage treatment

为了有效利用原生污水源热泵采暖空调,需要明确对污水生化处理的影响.论述了对污水采用加热处理工艺的正确性,调查了原生污水的水温情况和污水温度降低后污水处理厂的电耗增加情况,分析了水温与水处理效果的关系和热泵系统的取热降温幅度,以实例形式测算了污水处理厂增加的电耗等情况,提出了一些解决途径.研究表明:污水温度过低时采用投放低温菌的方式,污水的温降引起污水厂增加"少许电耗",约0.003～0.007 5 kWh/(℃.t),原生污水源热泵将使得污水厂需增加电耗约0.01 kWh/t,该电耗量仅为热泵系统耗电量的0.6%.原生污水源热泵对污水生化处理几乎没有影响,前景广阔.

For the purpose of effectually utilizing untreated sewage heat pump for heating and air conditioning,it needs to know the effect of untreated sewage source heat pump on biochemical sewage treatment.The temperature of untreated sewage and the increased electricity consumption of sewage treatment plants for lowering the sewage temperature were investigated,and the relation between sewage temperature and effects of biochemical sewage treatment and the extent of the temperature lowered by pump system were analyzed.The electricity consumption of sewage treatment plants was calculated through an engineering example.The results showed that,when sewage temperature is too low,it was good to use cold-adapted microorganisms for biochemical sewage treatment,and a small quantity of electricity consumption（0.003～0.007 5）kWh/（℃·t）is used.About 0.01 kWh/t quantity of electricity consumption would be used when heat pump system was exploited,which was only 0.6% of the quantity of electricity consumption of pump system.The effect of untreated sewage source heat pump on biochemical sewage treatment is very small.