Integrated sewage treatment equipment is widely used for sewage treatment in rural areas, hospitals, schools, scenic spots, etc. due to its simple operation and stable effluent. During the normal operation of integrated sewage treatment equipment, it is generally only necessary to regularly check the operation status, especially the maintenance of winter integrated sewage treatment equipment, which is the key to ensuring the stable operation of the equipment in cold seasons and maintaining good sewage treatment effects. Here are some specific maintenance measures:
1、 Thermal insulation and antifreeze
1. Integrated sewage treatment equipment using steam insulation and heat tracing system:
When using a steam insulation and tracing system, the instrument tracing steam should be preheated first to ensure that all insulation equipment such as tracing pipes, shut-off valves, and steam traps are evenly heated, avoiding sudden pressure increase and leakage.
Regularly check the steam pressure of the instrument insulation main pipe, the opening of the upper and lower return water valves, the smoothness of the steam trap, and whether the insulation pipe leaks, and promptly deal with them.
2. Integrated sewage treatment equipment using electric heat tracing insulation system:
The principle of electric heat tracing is to install heating elements between the insulation layer and the equipment to supplement the lost heat.
During installation, attention should be paid to the sealing of the cable entrance at the top of the junction box to prevent rainwater from entering.
Wrap the wiring according to the design and reserve the required trace wires, paying attention to reserving sufficient length of trace wires at the two-way or three-way fittings.
Regularly check the thickness of the insulation layer, waterproof cover, and the installation of the electric heating belt to ensure their safe and reliable operation.
3. Integrated sewage treatment equipment with external insulation measures:
The key equipment in the sewage treatment process, such as aeration tank and secondary sedimentation tank, shall be systematically wrapped and covered with effective thermal insulation materials (such as rubber and plastic foam, glass fiber products, polyurethane spraying, thermal insulation cotton, etc.).
Install heating systems in enclosed or semi enclosed indoor equipment rooms and ensure their normal operation, ensuring that the indoor temperature is not lower than 0 degrees.
Build insulation barriers, such as using insulation boards to construct insulation walls or setting up movable insulation curtains, to reduce the impact of cold air on equipment.
2、 Inspection and maintenance of integrated sewage treatment equipment
1. Increase inspection frequency:
Operation and maintenance personnel need to conduct more frequent inspections of sewage treatment plants, especially during severe rain and snow weather.
2. Pay attention to the working condition of the grille:
When the temperature is below 0 ℃, it is necessary to closely monitor the working condition of the grille, check whether the bars are frozen and causing a decrease in spacing, whether the rake teeth are deformed or broken, and promptly clean and repair them.
3. Check for freezing risk:
For equipment that operates intermittently, it is necessary to check for the risk of freezing and take additional insulation or antifreeze measures.
4. Valve and pipeline insulation:
Check whether the insulation measures of all valves and pipelines are intact and effective, and promptly repair or replace damaged or ineffective parts.
Pay special attention to whether there is water seepage or leakage in the water valve, and deal with it immediately.
3、 Microbial activity management
1. Pre domestication of bacterial strains:
Before the temperature drops significantly in autumn, domestication of microbial strains should be carried out in advance to improve their tolerance and adaptability to low-temperature environments.
2. Adjust nutritional components:
Closely monitor and regulate the content of nutrients in sewage in real time, timely supplement key nutrients such as carbon and nitrogen sources, and ensure that microorganisms receive sufficient and balanced nutrient supply.
3. Optimize sludge concentration and retention time:
By optimizing sludge age and controlling sludge discharge, the sludge concentration can be increased.
Reasonably adjust the time allocation of each processing unit, such as the time ratio of anaerobic, anoxic, and aerobic stages.
4、 Emergency response and plan formulation
1. Develop emergency plans:
Develop a comprehensive winter antifreeze plan, including equipment inspection, maintenance, drainage, insulation, and other aspects.
Clarify emergency response procedures and measures to ensure quick response in case of sudden situations.
2. Emergency response training:
Provide winter equipment maintenance and emergency response training for operation and maintenance personnel to ensure they are proficient in anti freezing measures and emergency response methods.
5、 Optimize operations and reduce energy consumption
1. Optimize operational processes:
Establish a sound and comprehensive equipment inspection mechanism, and regularly conduct detailed inspections and maintenance of all facilities and equipment.
Reasonably arrange the start and stop time of equipment and optimize its operating parameters.
2. Energy saving and consumption reducing measures:
Select effective low-energy motors and variable frequency speed control devices.
Clearly control the aeration rate according to actual processing needs to avoid energy waste.
In summary, the maintenance of winter integrated sewage treatment equipment needs to start from multiple aspects such as insulation and antifreeze, equipment inspection and maintenance, microbial activity management, emergency treatment and plan formulation, as well as optimization of operation and energy conservation and consumption reduction, to ensure stable operation of the equipment in cold seasons and maintain good sewage treatment effects.
