Copyright © Kunshan Pinhong EPT Co.,Ltd All rights reserved. Site Map Designed by iwonder.cn
Kunshan Pinhong EPT Co.,Ltd
Kunshan Pinhong EPT Co.,Ltd
Add : (Qiandeng Yuanchuang Base) No. 125, Jinxing South Road, Qiandeng Town, Kunshan, Jiangsu, China
Tel : （0086）15995617314
Fax : +86-512-50130524
E-mail :lvfang@ksphxs.com
1. Application of aerator in sewage treatment
Biological treatment methods can be divided into aerobic and anaerobic methods according to the aerobic conditions of the participating microorganisms. Generally speaking, the aerobic method is more suitable for low-concentration sewage, such as ethylene plant sewage; the anaerobic method is more suitable for the treatment of high-concentration sludge and sewage. Aerobic biological treatment can be divided into activated sludge method and biofilm method.
Activated sludge method is an artificial enhancement method of water self-purification, which relies on activated sludge as the main body to remove organic matter in sewage. The aerobic microorganisms present in activated sludge can only function in the presence of oxygen.
In the aeration tank of the sewage treatment biochemical system, the oxygenation efficiency is positively correlated with the growth of aerobic microorganisms. The amount of dissolved oxygen should be considered comprehensively based on the number, physiological characteristics, substrate properties and concentration of aerobic microorganisms.
In this way, activated sludge can be in a good state of degrading organic matter. According to the test, the dissolved oxygen in the aeration tank should be kept at 3 ~ 4 mg/L. If the oxygen supply is insufficient, the performance of the activated sludge will deteriorate, resulting in a decrease in the wastewater treatment effect. In order to ensure a sufficient supply of oxygen, it must rely on a device such as an aerator.
2. Aeration principle
Aeration is a means to make air and water come into strong contact. Its purpose is to dissolve oxygen in the air in the water, or to remove unwanted gases and volatile substances from the water into the air. In other words, it is a means to promote the exchange of substances between gas and liquid. It also has other important functions such as mixing and stirring.
The oxygen in the air is transferred to the water by aeration, and the oxygen is transferred from the gas phase to the liquid phase by mass transfer. This theory of mass transfer and diffusion is widely used by Lewis and Whitman