Bacterial fed-batch anaerobic ammonium oxidation apparatus and technology thereof

Abstract

The invention discloses a strain fed-batch anaerobic ammonia oxidation device and a technique thereof. The strain fed-batch anaerobic ammonia oxidation device consists of two parts: an anaerobic ammonia oxidation strain seed tank and an anaerobic ammonia oxidation reactor, wherein the anaerobic ammonia oxidation strain seed tank is operated by adoption of simulated ammonia-bearing and nitrite-bearing inorganic wastewater, so as to culture anaerobic ammonia oxidation sludge; the anaerobic ammonia oxidation reactor is used for treating actual nitrogen-containing wastewater, and the anaerobic ammonia oxidation sludge which comes from the anaerobic ammonia oxidation strain seed tank is inputted into the anaerobic ammonia oxidation reactor through a gravity strain fed-batch device, so as to strengthen the function of denitrogenation. The strain fed-batch anaerobic ammonia oxidation device improves the quality of a strain, shortens the starting time of the anaerobic ammonia oxidation reactor, improves the potency and the stability of the anaerobic ammonia oxidation reactor, and widens the application scope of the anaerobic ammonia oxidation technique through fed-batch of the strain.

Description

technical field [0001] The invention relates to a strain feeding type anaerobic ammonium oxidation device and a process thereof. Background technique [0002] After the national "One Control, Two Standards" campaign, the organic pollution of wastewater has been effectively controlled, and nitrogen and phosphorus pollution has gradually become a major environmental problem. According to the Bulletin on the State of the Environment in China, my country's ammonia nitrogen emissions reached 1.498 million tons in 2005, an increase of 12.6% over the previous year. Excessive levels of ammonia nitrogen in surface water are common across the country, resulting in serious eutrophication of water bodies. The control of nitrogen pollution has become a major environmental protection issue that needs to be solved urgently. [0003] Under anaerobic conditions, the process of using anammox bacteria to convert nitrite and ammonia into nitrogen is called anammox. Anaerobic ammonium oxidatio...

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Problems solved by technology

[0004] However, the anammox bacteria are autotrophic bacteria, the cell yield is very low, the doubling time is very long, and they are very sensitive to environmental conditions, resulting in a very slow start-up process of the reactor; in addition, in most industrial, agricultural wastewater and domestic In sewage, ammonia nitrogen is often accompanied by organic matter and has a relatively high C / N. Studies have shown that when organic matter exists, the growth rate of heterotrophic bacteria is much higher than that of anammox bacteria, which will limit anammox reaction; at the same time, there are often toxic substances (such as sulfides) in wastewater, which is not conducive to the growth and proliferation of anammox bacteria, so as to affect the operation stability of the anammox process

All of these restrict the engineering application of the anammox process

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