An anaerobic built-in rusty iron filings reactor for efficient removal of ammonia nitrogen and its process for treating ammonia nitrogen wastewater

Abstract

The invention provides an anaerobic built-in rusted iron scrap reactor for efficiently removing ammonia nitrogen, and a process for treating ammonia nitrogen wastewater. The process is especially suitable to treat anaerobic high-concentration ammonia nitrogen wastewater. The process comprises the following steps of filling a sludge layer of the anaerobic built-in rusted iron scrap reactor with anaerobic sludge acclimated through ammonia nitrogen wastewater; adding pretreated rusted iron scraps to the anaerobic built-in rusted iron scrap reactor to be fully mixed with the anaerobic sludge; putting a pair of a positive electrode and a negative electrode into the anaerobic built-in rusted iron scrap reactor at the same time; connecting the two electrodes with the positive and negative electrodes of a power supply through lead wires; and realizing the treatment of the anaerobic enhanced high ammonia nitrogen wastewater through the dissimilatory iron effect of the sludge in the rusted iron scrap enhanced anaerobic reactor and anodic oxidation, coupled with cathode denitrification, of ammonia nitrogen. The process overcomes the technical defects of low anaerobic ammonia nitrogen removal efficiency and relatively long consumed time, and is a new anaerobic ammonia nitrogen wastewater treatment process which is efficient, low in price and low in consumption.

Description

technical field [0001] The invention relates to a wastewater treatment process in the field of environmental protection. Background technique [0002] Excessive discharge of ammonia nitrogen leads to increasingly serious eutrophication of water bodies, and its oxidation products of nitrate and nitrite will seriously affect the health of aquatic organisms and humans. Therefore, efficient treatment of ammonia nitrogen in wastewater has become a major issue facing the environment today. At present, the methods of ammonia nitrogen removal mainly include biological nitrification-denitrification, break point chlorination, gas stripping and ion exchange. Although the traditional stripping method has stable ammonia removal effect and simple operation, its disadvantages are that it is greatly affected by the ambient temperature, the stripping efficiency is limited, the operating cost is high, and the consumption of chemicals is large when adjusting the pH, so this technology is main...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of long time-consuming anaerobic ammonia nitrogen removal and low removal efficiency in the prior art, the present invention proposes the following technical proposal: an anaerobic built-in rusted iron filings reactor for efficiently removing ammonia nitrogen, which is characterized in that: the box body and the There is a circulating water chamber between the inner chambers of the reactor, and the fixed electrode anode and electrode cathode under the inner chamber of the reactor are respectively connected to the positive and negative poles of the power supply through wires.

Images