AO integrated machine device
A/O process, also called anaerobic-aerobic process, is mainly used in water treatment. A is the anaerobic section, which is mainly used for nitrogen and phosphorus removal; O is aerobic stage, which is mainly used to remove organic matter from water. It can not only remove organic pollutants in wastewater, but also remove nitrogen and phosphorus at the same time. For high-concentration organic wastewater and refractory wastewater, a hydrolysis acidification section is set before the aerobic section, which can significantly improve the biodegradability of wastewater.
■ Working principle:
A/O is the abbreviation of Anoxic/Oxic. Its advantage is that it not only degrades organic pollutants, but also has certain nitrogen and phosphorus removal functions. It uses anaerobic hydrolysis technology as the pretreatment of activated sludge, so A/O method is an improved activated sludge method.
The A/O process connects the front anoxic section and the rear aerobic section in series, and the DO of the A section is not more than 0.2mg/L, and the DO of the O section is 2 ~ 4 mg/L.. In anoxic stage, heterotrophic bacteria hydrolyze suspended pollutants such as starch, fiber, carbohydrate and soluble organic matters in sewage into organic acids, so that macromolecular organic matters are decomposed into micromolecule organic matters, and insoluble organic matters are converted into soluble organic matters. When these products after anoxic hydrolysis enter an aerobic tank for aerobic treatment, the biodegradability of sewage is improved and the oxygen efficiency is improved.
In the anoxic stage, heterotrophic bacteria ammoniate pollutants such as protein and fat (N in organic chain or amino in amino acid) to free ammonia (NH3, NH4+). Under the condition of sufficient oxygen supply, the nitrification of autotrophic bacteria oxidizes NH3-N (NH4+) to NO3-, return to Pool A through reflux control. Under anoxic condition, the denitrification of heterotrophic bacteria will reduce NO3- to molecular nitrogen (N2), complete the ecological circulation of C, N and O, and realize the harmless treatment of sewage.
■ Analysis of Process Advantages:
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Lightweight, easy to transport and install |
It has excellent characteristics such as corrosion resistance, anti-aging and long service life; |
It can maximize the integration of the system and reduce the occupied area |
No pollution, no noise, no peculiar smell, and reduce secondary pollution |
Flexible, can be used singly or in combination |
PLC automatic electrical control system and equipment fault alarm system operate safely and reliably |
■ Applicable industries：
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