Real-time control and method of a2/o-biological contact oxidation device with short-range nitrification coupling denitrification phosphorus removal
A technology of denitrification and phosphorus removal and biological contact, applied in the direction of temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of low efficiency of nitrogen and phosphorus removal and high energy consumption, so as to improve the practicality and The effects of controllability, high biomass and high nitrification efficiency
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specific Embodiment approach 1
[0028] NH 4 + The sensor 28 collects the ammonia nitrogen concentration in the outlet water tank 6 online, and obtains the real-time control variable through the output of the computer 8 . When NH 4 + When the concentration is ≥5mg / L, increase the aeration rate to 0.3-0.4m 3 / h; when NH 4 + When the concentration is ≤0.5mg / L, reduce the aeration rate to 0.1~0.2m 3 / h.
specific Embodiment approach 2
[0029] NH 4 + The sensor 28 collects the ammonia nitrogen concentration in the outlet water tank 6 online, and obtains the real-time control variable through the output of the computer 8 . When NH 4 + When the concentration is ≥5mg / L, increase the aeration rate to 0.3-0.4m 3 / h; when NH 4 + When the concentration is ≤0.5mg / L, reduce the aeration rate to 0.1~0.2m 3 / h. The temperature sensor 19 and the DO sensor 20 collect the temperature and dissolved oxygen concentration in each compartment of the biological contact oxidation tank 4 online, and obtain real-time control variables through the output of the computer 8 . When the effluent nitrite accumulation rate NO 2 - / NO x - When ≤50%, reduce the dissolved oxygen to 0.5-1.5 mg / L, and at the same time turn on the heating controller 33 to control the reactor temperature at 25-35°C. When the effluent nitrite accumulation rate NO 2 - / NO x - ≤30%, on the basis of the above, change the water inlet of the middle wat...
specific Embodiment approach 3
[0030] NH 4 + The sensor 28 collects the ammonia nitrogen concentration in the outlet water tank 6 online, and obtains the real-time control variable through the output of the computer 8 . When NH 4 + When the concentration is ≥5mg / L, increase the aeration rate to 0.3-0.4m 3 / h; when NH 4 + When the concentration is ≤0.5mg / L, reduce the aeration rate to 0.1~0.2m 3 / h. NO 3 - Sensor 29, NO 2 - The sensor 30 and the TP sensor 31 collect the concentrations of nitrate nitrogen, nitrite nitrogen and total phosphorus in the outlet water tank 6 online, and obtain real-time control variables through the calculation output of the computer 8 . when NO 3 - +NO 2 - When the concentration ≥ 14mg / L or TP concentration ≥ 1mg / L, increase the reflux ratio of the nitrification solution to 300% to 400%; when NO 3 - +NO 2 - When the concentration is ≤6mg / L or TP concentration is ≤0.2mg / L, reduce the reflux ratio of the nitrification solution to 100%-200%.
[0031] Due to the i...
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