Aeration tank scrap appraisal

Aeration tank is a structure that uses activated sludge method for sewage treatment. The aeration tank mainly consists of three parts: the tank body, the aeration system and the water inlet and outlet. The pool body is generally made of reinforced concrete, and its plane shapes include rectangular, square and circular. Aeration tanks generally form a joint process with sedimentation tanks. Aeration tanks are developing towards high efficiency, small size and energy saving.
aeration tank equipment is usually made of corrosion-resistant materials, such as stainless steel or durable polymer materials. Its service life is usually about 10 years, but regular maintenance and inspection can extend its life.
As an independent third-party inspection and testing organization under Guoke Holdings, Zhongke Testing has the qualifications for fixed asset scrapping appraisal and can carry out aeration tank scrapping appraisal services.

1. Observe the level of dissolved oxygen in the aeration tank. The aeration tank should be able to provide sufficient dissolved oxygen to meet the aerobic needs of the microorganisms. By monitoring the dissolved oxygen level in the aeration tank in real time, its oxygen transfer efficiency and dissolved oxygen capacity are evaluated. If dissolved oxygen levels are low, it may be a sign that the aeration unit is becoming less effective and needs to be serviced or replaced.
2. Observe the bubble distribution and mixing in the aeration tank. The aeration device should be able to evenly distribute air bubbles and stir the wastewater to ensure adequate contact between microorganisms and waste particles in the wastewater. Check whether there are dead zones or uneven distribution of bubbles in the aeration tank to ensure that the wastewater can fully contact and mix with the bubbles.
3. Evaluate the energy efficiency of aeration tanks. Aeration equipment consumes a considerable amount of energy. Evaluate the energy consumption efficiency of the aeration tank by comparing energy consumption and sewage treatment effect. If energy consumption is high and treatment is not effective, it may be necessary to adjust the aeration system or optimize energy consumption.

Due to the use and safety requirements of the sewage treatment equipment aeration tank of a sewage treatment plant, the original equipment was updated. In order to determine whether this batch of equipment has reached the scrap state, the sewage treatment plant entrusted our company to identify whether the aeration tank has reached the scrap state.
appraisal analysis results:
The appraisal analysis expert group conducted on-site inspection and survey results on the aeration tank entrusted for appraisal and evaluation, and made the following suggestions and conclusions:
The aeration tank equipment is seriously corroded and aged and does not meet the conditions for normal use. The sewage treatment equipment of the same model has been discontinued and does not meet the conditions for replacement and maintenance of original parts. It is recommended to be scrapped.