Sewage treatment technology is usually a combination of physical,chemical,and biological methods.Under low temperature conditions,the physical properties of sewage treatment facilities will deteriorate,and the external conditions of chemical reactions and biological reactions will not be conducive to sewage purification.The effluent of the sewage plant in winter is not up to standard,which is a headache for many sewage plant operators.

According to experience,the equipment of the sewage plant is prone to failure and difficult to maintain in harsh environments such as low temperature.

Therefore,in order to reduce the risk of accidents,it is necessary to plan for the operation of the sewage plant in winter before entering the winter.Of course,if it is not done well,it should be remedied immediately.

First,start with the improvement of the management system.It is necessary to incorporate the problems that are likely to occur under low temperature conditions into the management system,and prepare emergency plans to strengthen the training of all personnel before the winter.

Secondly,the equipment needs to be inspected and modified.Before entering the winter,a comprehensive overhaul of the existing sewage treatment equipment should be carried out,and qualified sewage plants should be replaced in advance with equipment suitable for low-temperature operation.

There are also measures to prevent freezing of pipelines and valves.Anti-freezing of pipelines: The deactivated pipelines should be emptied of water before entering the winter.The sewer pipelines and scum wells should be thoroughly cleared and cleaned before entering the winter.Other pipelines should also consider anti-freezing.Valve antifreeze: first check and ensure that the valve is not leaking,then put the grass mat into the valve well and finally check the insulation measures to ensure that it is intact and effective.Inspect the insulation measures of the blind end of the process flow,the glass plate level gauge,the power distribution room and the cabinet to ensure normal use; check the integrity of the glass in the living building,warehouse and power distribution room,and eliminate the problems in time; The well room is covered with grass curtains to keep warm.