An anoxic fluidized bed device for high concentration nitrate nitrogen wastewater treatment

Abstract

The invention discloses an anoxic fluidized bed device for treating high-concentration nitrate-nitrogen wastewater, which comprises: a feed tank, an anoxic fluidized bed, a nitrogen generator system and a nitrogen outlet distributor; an anoxic fluidized bed It includes a packing area, a transition section and a water outlet area arranged in sequence from bottom to top, and a three-phase separator is arranged in the water outlet area; a water inlet is provided at the bottom of the anoxic fluidized bed, and above the water inlet, A water flow distributor is provided under the filling area, and a water outlet is provided on the upper part of the water outlet area; the feed tank is connected to the water inlet of the anoxic fluidized bed through the feed pipe; the nitrogen generator system is connected to the nitrogen outlet distributor through the inlet pipe The nitrogen outlet distributor is located in the filling area of ​​the anoxic fluidized bed, and the position of the nitrogen outlet distributor in the anoxic fluidized bed can be adjusted. The device provided by the present invention sets the position of the nitrogen outlet distributor according to the needs, so as to realize the directional positioning and precise film removal.

Description

technical field [0001] The invention relates to an anoxic fluidized bed device used for the treatment of high-concentration nitrate and 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 affecting water quality. The most common inorganic pollutant is nitrate. NO 3 - Hazardous to human health, NO 3 - After entering the human body, it is reduced to NO 2 - , NO 2 - have carcinogenic effects, in addition, NO inhaled in infants and young children 3 - After entering the blood, it interacts with hemoglobin and oxidizes Fe(II) to Fe(III), resulting in the formation of methemoglobin. Methemoglobin binds irreversibly with oxygen, causing methemoglobinemia, and in severe cases, it can lead to death due to hypoxia. How to economically, safely and effectively remove...

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

Images