Anoxic fluidized bed device for treating high-concentration nitrate-nitrogen wastewater

Abstract

The invention discloses an anoxic fluidized bed device for treating high-concentration nitrate-nitrogen wastewater. The anoxic fluidized bed device comprises a feeding tank, an anoxic fluidized bed, anitrogen generator system and a nitrogen outlet distributor, wherein the anoxic fluidized bed comprises a filling material area, a transition section and a water outlet area which are sequentially arranged from bottom to top; a three-phase separator is arranged in the water outlet area; a water inlet is arranged at the bottom end of the anoxic fluidized bed; a water flow distributor is arranged above the water inlet and below the filling material area; a water outlet is arranged at the upper part of the water outlet area; the feeding tank is connected with the water inlet of the anoxic fluidized bed through a feeding pipe; the nitrogen generator system is connected with the nitrogen outlet distributor through a gas inlet pipe; the nitrogen outlet distributor is located in the filling material area of the anoxic fluidized bed; and the position of the nitrogen outlet distributor in the anoxic fluidized bed is adjustable. The device provided by the invention realizes accurate demolding in a directional positioning way through arrangement of the position of the nitrogen outlet distributor according to needs.

Description

technical field [0001] The invention relates to an anoxic fluidized bed device for treating high-concentration nitrate-nitrogen wastewater. Background technique [0002] Water is the source of human life. With the development of economy and the intensification of human activities, the pollution of water environment has become more and more serious. There are many kinds of pollutants that affect water quality. The most common inorganic pollutant is nitrate. NO 3 - Harmful to human health, NO 3 - After entering the human body, it is reduced to NO 2 - , NO 2 - Carcinogenic, in addition, the NO inhaled by infants and young children 3 - After entering the blood, it interacts with hemoglobin to oxidize Fe(II) to Fe(III) to form methemoglobin, which irreversibly combines with oxygen, causing methemoglobinemia and, in severe cases, death due to hypoxia. How to remove nitrate nitrogen from water economically, safely and effectively, and develop efficient and stable sewage d...

AI Technical Summary

Problems solved by technology

However, only suspended fillers are used for treatment, and the effluent contains a higher concentration of particulate matter and suspended matter, resulting in higher turbidity

In the traditional sand filtration process, due to the high density of sand and other fillers, the relative filling rate is low, and the effective utilization rate of the reactor is correspondingly reduced; at the same time, it is easy to cause blockage during process operation, which is not conducive to process operation

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