Improved up-flow anaerobic ammoniation reactor and method for treating high-organic nitrogen printing and dyeing wastewater

Abstract

The invention relates to an improved up-flow anaerobic ammoniation reactor for treating high-organic nitrogen printing and dyeing wastewater. The improved up-flow anaerobic ammoniation reactor comprises a tower, wherein the tower is orderly provided with a gas collection system having a three-phase separator, a tower water outlet, an anaerobic sludge reaction region, a water distribution system, a water feed pump and an internal circulation system from top to bottom, and the internal circulation system is connected with the top and the bottom of the tower; the improved up-flow anaerobic ammoniation reactor is characterized by further comprising an anaerobic biological membrane reaction region composed of a filler, filler bracket and an anaerobic biological membrane formed on the filler, wherein the anaerobic biological membrane reaction region is arranged between the tower water outlet and the anaerobic sludge reaction region; the water inlet end of the internal circulation system is connected with an internal circulation port while the water outlet end thereof is connected with a water inlet pipe through a reflux pump. The improved up-flow anaerobic ammoniation reactor can treat the printing and dyeing wastewater based on compositions according to pretreatment wastewater and printing and dyeing wastewater, which is beneficial for hydrolyzing and acidizing refractory dye organics in the printing and dyeing wastewater, decomposing the dye organics into micromolecular organics and improving anaerobic ammoniation effect.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to an improved upflow anaerobic ammonification reactor and method for treating printing and dyeing wastewater with high organic nitrogen. Background technique [0002] Printing and dyeing wastewater mainly comes from the various processes of using dyes and auxiliaries in the printing and dyeing production process. It has prominent problems such as large water volume, complex components, refractory degradation, and high concentration of organic nitrogen that is difficult to ammoniate. [0003] The existing dye wastewater treatment methods mainly include membrane separation, flocculation, electrochemistry, advanced oxidation, activated carbon adsorption and biological methods. At present, the main treatment process of domestic printing and dyeing wastewater is still biological treatment, but due to its poor biodegradability, it is difficult to achieve ...

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Problems solved by technology

Although the method of treating printing and dyeing wastewater with anaerobic-aerobic combined process can improve the biodegradability of wastewater, improve the treatment effect, and provide an effective way for the current printing and dyeing wastewater treatment process to improve the treatment effect, but the method still has the following deficiencies: First, because the UASB reactor is connected in series before the aerobic process, the mud-water separation effect is obviously not good, and small-volume sludge is likely to be discharged following the treatment effluent during operation, especially when the amount of biogas generated is large. The effluent has a high mud content, which increases the difficulty of subsequent degradation treatment; second, the ability to regulate the pH in the reactor is poor, resulting in a drop in the pH value in the acid-producing dehydrogenation stage, which easily inhibits the methanogens and causes waste water The treatment effect is not good; the third is that the mixing degree of mud and water in the reactor is insufficient, which brings great inconvenience to the operation

[0004] Chinese patent application 200510123101.9 proposes "a biological anaerobic reactor for textile printing and dyeing wastewater". area and the decolorization effect is not good, but there is still the problem of not setting up a regulating tank or a quality separation system according to the difference in the quality of printing and dyeing wastewater

Chinese patent application 201210321293.4 proposes "a method for treating printing and dyeing wastewater". This method is to install a desulfurization dust collector, ash settling tank and regulating acidification tank before the UASB, and a good pre-treatment of the wastewater is carried out, but there are still no settings The reflux system leads to the problem of low efficiency of UASB organic ammoniation

Chinese patent application 200910232775.0 proposes "integrated bioreactor and its application and method for treating high-concentration organic wastewater". This method combines UASB and MBBR to maintain the acid-base balance of UASB, which is conducive to the efficient wastewater treatment of microorganisms , but there is also the problem of not setting up a regulating tank or a quality separation system according to the complex wastewater conditions of printing and dyeing, resulting in poor printing and dyeing wastewater treatment effects

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