Double-circulation biological membrane anaerobic ammonia oxidation reactor

Abstract

The invention discloses a double-circulation biological membrane anaerobic ammonia oxidation reactor. The lower part of the reactor is provided with a unique cyclone water distributor; a soft filler, a screen, a floating ball, a three-phase separator and a down pipe are arranged in the reactor; and a reflux water outlet pipe, a reflux water inlet pipe and an overflow weir are arranged outside the reactor. The reactor has the advantages that: 1) the cyclone water distributor can produce tangential flow to ensure uniform water distribution and facilitate reinforcing mass transfer; 2) the soft filler arranged in the reactor can retain the sludge, reinforce the treating effect and shorten the starting time; 3) the screen and the floating ball can eliminate gas surge phenomenon and relieve the interference of rising bubbles to a settling region; and 4) the reflux of the down pipe can reinforce the mixing of a reaction region, improve the mass transfer effect, meanwhile dilute the inlet water and improve the impact load resistance of the reactor; the refluxes of the reflux water inlet pipe and the reflux water outlet pipe can maintain the normal operation of the reactor at the starting stage and the low load stage; and the internal and external refluxes can ensure that the reactor can efficiently and stably run under low load and high load.

Description

technical field [0001] The invention relates to a treatment device for nitrogen-containing wastewater, in particular to a double-circulation biofilm anaerobic ammonium oxidation reactor. Background technique [0002] With the rapid development of industry and agriculture and the substantial improvement of people's material living standards, the discharge of nitrogen-containing wastewater has increased sharply, resulting in very serious nitrogen pollution. There are varying degrees of nitrogen pollution in most watersheds in my country, and it has intensified. trend. Nitrogen pollution is extremely harmful and can induce red tides, algae blooms and other environmental problems, causing economic losses, social unrest and ecological damage. Economical and effective control of nitrogen pollution has become a hot spot in the field of environmental engineering. [0003] For the control of nitrogen pollution, the traditional denitrification methods include air stripping method, br...

AI Technical Summary

Problems solved by technology

This type of anaerobic ammonium oxidation reactor has the following problems: ①The sludge loss is serious, and the reactor startup time is long; ②At the initial stage of startup and under low load conditions, the mass transfer effect is poor and the removal effect is not good; The phenomenon of gas surge (referred to as "gas surge") is prone to occur under load conditions; ④ Using a pump to return sludge not only increases equipment costs and power consumption, but also destroys the sludge structure, which is not conducive to the formation of granular sludge with excellent performance

Images