When sewage treatment equipment is used in sewage treatment project, it needs depreciation after a certain period of use. Generally speaking, the depreciation period and residual rate of sewage treatment equipment are reasonably determined according to the nature and expected use of fixed assets, and the depreciation period of some fixed assets shall not be less than the following provisions:
The depreciation period of pipe network 15 years, sewage structures 10 years (including special equipment) and other fixed assets shall not be less than the relevant provisions of the Regulations for the Implementation of the Enterprise Income Tax Law of People's Republic of China (PRC). The depreciation of sewage treatment equipment generally adopts the straight-line method (average life method), and can also be accrued according to the life.
Second, how to maintain and maintain sewage treatment equipment
In order to ensure the efficient operation of sewage treatment equipment, ensure the safety of equipment performance and prevent accidents, attention should be paid to the maintenance of sewage treatment equipment:
1, Daily maintenance of sewage treatment equipment
While increasing the use of equipment, do a good job in accident prevention. For example, in the maintenance of the reducer in sewage treatment equipment, different oils are added according to its characteristics, and the equipment is maintained according to the requirements of the season. But also to prevent sewage treatment equipment from frequent contact with sludge and sewage for a long time, and to prevent corrosion caused by humid environment. It is necessary to do daily anti-corrosion work and maintain sewage treatment equipment, such as regular refueling and sludge cleaning.
2. Maintenance of sewage treatment equipment
The maintenance system of sewage treatment equipment adopts multi-level daily maintenance measures such as daily maintenance, primary maintenance and secondary maintenance. In order to reduce the influence of climate and mechanical vibration on the equipment and play a normal role in the operation of the equipment.
Daily maintenance work includes: lubricating the equipment regularly, simply checking the condition of the equipment, carefully checking the oil level and oil standard of the equipment, etc. Cleaning and wiping work should be done before the end of equipment work, and special maintenance personnel should be set up to carry out daily maintenance work. The first-level maintenance shall be carried out according to the specified duration. When the equipment stops running, it should be inspected and disassembled for inspection if necessary; Technicians should understand the function and structure of the equipment to reduce the wear and tear of the equipment and prolong its service life. The first warranty period is once every three months and the second warranty period is once a year.