Harbin sewage treatment equipment plays an indispensable role in treating sewage and protecting the environment.Regular cleaning is not only necessary for sewage treatment equipment,but also a key factor in ensuring its normal operation,improving treatment efficiency,and extending its service life.

　　1、The necessity of regular cleaning

　　Prevent blockage

　　During the operation of sewage treatment equipment,suspended solids,sediment,oil,fibers and other impurities in the sewage will gradually deposit inside the equipment.For example,at the grille,if not cleaned in a timely manner,the intercepted large particles and debris will accumulate too much,hindering the subsequent flow of sewage and reducing the water inlet efficiency of the equipment.In pipelines and pump bodies,the deposition of impurities can cause the diameter of the pipe to decrease,increase water flow resistance,and in severe cases,even lead to pipeline blockage,making it impossible to transport sewage normally.For biological treatment units,such as the aeration head in the aeration tank,if it is blocked,it will affect the aeration effect and reduce the ability of microorganisms to decompose pollutants in sewage.

　　Maintain processing efficiency

　　Various treatment units in sewage treatment equipment have their specific treatment functions and operating parameters.As the equipment operates,conditions such as dirt and excessive growth of biofilms can affect its processing capacity.For example,in a sedimentation tank,if the sludge is not cleaned up in time,it will be carried out with the water flow,affecting the clarity of the effluent water quality.In the filter,the accumulation of impurities will reduce the filtration speed and efficiency,resulting in ineffective removal of pollutants in the sewage.Regular cleaning can remove these factors that affect treatment efficiency,keep the equipment in good operating condition,and ensure effective treatment of sewage.

　　Extend equipment lifespan

　　The chemical components in sewage may cause corrosion to equipment,and the adhesion of impurities can accelerate equipment wear.For example,in some metal reaction vessels,acidic or alkaline substances in the wastewater are more likely to corrode the surface of the equipment under the cover of dirt.By regularly cleaning,corrosion and wear on the surface of equipment can be detected in a timely manner,and corresponding measures can be taken for repair or protection,thereby extending the service life of equipment,reducing the frequency of equipment updates,and lowering operating costs.

　　2、Key points for cleaning different types of equipment

　　Physical processing equipment

　　For the grille,it should be regularly cleared of intercepted debris,usually checked and cleaned daily.The sedimentation tank should discharge sand regularly,and according to the sand content in the sewage,it can be discharged once a week or once a month.The sludge cleaning cycle of the primary sedimentation tank is relatively long,usually cleaned every 2-3 days.During cleaning,attention should be paid to keeping the sludge discharge pipeline unobstructed.

　　Biological processing equipment

　　In the activated sludge treatment system,the activated sludge in the aeration tank needs to be discharged regularly to control the sludge age and concentration.Generally,based on the growth of the sludge,it is discharged every 3-7 days.The secondary sedimentation tank should ensure the normal sedimentation of sludge,timely scrape off the sludge at the bottom,and prevent the sludge from floating up and affecting the effluent quality.The cleaning cycle is usually 1-2 days.If the biofilm in the biofilm treatment equipment grows too thick,it needs to be regularly washed or peeled off,usually checked and cleaned once a month.

　　Deep processing equipment

　　For filters such as sand filters,activated carbon filters,etc.,regular backwashing should be carried out according to the inlet water quality and filtration effect.The backwash cycle of sand filters may be 1-3 days,while the backwash cycle of activated carbon filters may be slightly longer,about 3-7 days.Disinfection equipment,such as ultraviolet sterilizers,should regularly clean the dirt on the surface of the lamp tube to ensure the penetration rate of ultraviolet rays.Generally,cleaning should be done once a month.

　　3、Precautions for cleaning

　　Security protection

　　When cleaning sewage treatment equipment,attention should be paid to safety protection.Due to the possible presence of toxic and harmful substances in wastewater,operators should wear appropriate protective equipment such as gas masks,protective gloves,waterproof boots,etc.When cleaning electrical equipment or equipment with mixing devices,the power should be cut off first to prevent electric shock or mechanical injury.

　　Selection of cleaning methods

　　Choose the appropriate cleaning method based on the material,type of dirt,and degree of contamination of the equipment.For general dirt,a combination of mechanical cleaning(such as brushes,shovels)and water flushing can be used.For stubborn dirt or biofilms,chemical cleaning agents may need to be used,but attention should be paid to the selection and concentration of chemical cleaning agents to avoid corrosion of equipment.

　　Recording and monitoring

　　After each cleaning,make a record,including the date of cleaning,equipment name,cleaning content,and discovered problems.At the same time,it is necessary to strengthen the operation monitoring of sewage treatment equipment,and timely detect abnormal situations of equipment through water quality analysis,equipment operation parameter monitoring and other means,providing reference for the next cleaning.

　　Sewage treatment equipment must be regularly cleaned,which is an important measure to ensure its efficient operation,extend its service life,and ensure the effectiveness of sewage treatment.Only by attaching importance to and doing a good job in regular cleaning of equipment can sewage treatment equipment better play its environmental and social benefits.