Sewage treatment plant operation and maintenance technical scheme

The original records mainly include duty records, work logs and equipment maintenance records, including records of various test, analysis or instrument display data. Statistical statements are compiled on the basis of original records and can be divided into annual statistics, monthly statistics, quarterly statistics, etc. In general, monthly statistical statements are copied to the head office or the office by the workshop every month or the studio every quarter or every year to the factory. Each operation daily or weekly copy daily or weekly statistical report to the work section.

Original records or statistical reports, and can be divided into operation, laboratory testing, equipment, financial and other types of reports.

When the operation duty personnel fill in the original records, they must be timely, clear, complete, true and accurate. The preparation of statistical reports in a regular, systematic and concise manner reflects the main information of the operation and management status of different periods and different professions in the sewage treatment process.

Chapter III Operation and management of sewage treatment system

3.1 Operation management of preprocessing

1. Between grilles

(1) Determination of the number of grille working units

Through the flow meter and water level meter set in the front of the sewage plant, the sewage flow rate and the water depth in the canal can be learned, and then according to the relationship between the inflow sewage volume and the grating work designed by the design recommendation or the operation operation procedure, the number of grilles put into operation can be determined. The number of grilles put into operation can also be determined by calculating the optimal flow rate of the grating.

(2) Removal of grid slag

When the grid decontamination machine is cleaned every day, it is mainly controlled by the liquid level difference in front of the grid, and when necessary, it is controlled by combining the mode of opening and stopping when necessary. No matter what method is used, the personnel on duty should be regularly inspected, the amount of grid slag accumulated by manual opening and stopping is determined by many factors, when the amount of grid slag is large in a day, a month or a year, managers should pay attention to explore and summarize, in order to improve the efficiency of operation. In addition, it is necessary to strengthen the inspection and timely find the fault of the grid decontamination machine; Press and remove grid slag in time; Do a good job of ventilation between the grates.

(3) Check the sand settling situation of the channel regularly

Due to the slowing of sewage flow rate or the increase of roughness in the channel, sand may accumulate in the channel before and after the grid, and the sand should be regularly checked and cleaned, or the channel should be repaired.

(4) Make operation measurement and record

The weight or capacity of the daily grid slag should be measured, and the normal operation of the grid should be judged by the change of the grid slag amount.

2, sewage lifting pump room

(1) Operation scheduling of the pump group

Before the sewage from the sewage plant enters the pump room, there is generally no regulating tank. In order to ensure that the amount of pumping is consistent with the amount of incoming water, the operation scheduling of the pump group should pay attention to the following:

a, try to use the combination of large and small pumps to meet the amount of water, rather than relying on valves to adjust, in order to reduce pipeline head loss, energy saving and consumption reduction;

b, maintain the high water level of the sump, can reduce the lifting head;

c, the number of starts and stops of the pump can not be too frequent;

d, the number and time of operation of each pump should be basically uniform.

(2) Pay attention to the change of various instrument Pointers

For example, the vacuum meter, pressure gauge, ammeter, bearing temperature meter, oil level meter changes. If the pointer deviates or jumps, the cause should be identified and solved in time.

a Maintenance of catchment pool

As the flow of sewage slows, mud and sand may 喾 to the bottom of the catchment basin. Pay attention to personal safety when cleaning regularly. Before clearing the pool, it should be forced to exhaust air first, and only after meeting the requirements stipulated by the safety department can people work in the pool. After the pool should still maintain a certain amount of ventilation. Each operator shall not work in the pool for more than 30 minutes.

b Keep running records

The contents of each shift should be recorded: the display value of the main instrument, the platform number of the pump in each period, the abnormal situation and the treatment result.

3.2 Operation and management of primary sedimentation tank

1, the operation operator should observe and record the reaction tank alum growth, and compare it with the previous record data. If any abnormality is found, the cause should be analyzed in time and corresponding countermeasures should be taken. For example, the alum particles at the end of the reaction pond are fine and the water body is cloudy. And not easy to precipitate, it means that coagulant administration is not enough. If the alum particles at the end of the reaction tank are large but very loose, the effluent of the sedimentation tank is unusually clear, but the outlet water also contains a large number of alum flowers, which indicates that the dosage of coagulant is too large, so that the alum particles grow abnormally, but they are not dense and are not easy to precipitate.