Normal-temperature starting domestication method for anaerobic ammoxidation reactor with low-dissolved-oxygen inflow water

Abstract

The invention discloses a normal-temperature starting domestication method for an anaerobic ammoxidation reactor with low-dissolved-oxygen inflow water and relates to the starting domestication method of a reactor. The method aims to solve the problems that starting time of the anaerobic ammoxidation reactor is long, and that the dissolved oxygen in the inflow water brings the adverse effect on the anaerobic ammoxidation process and causes high energy consumption. The method comprises the following steps: 1, culturing a denitrification biomembrane; 2, starting the anaerobic ammoxidation reactor; and, 3, domesticating the anaerobic ammoxidation reactor. The method provided by the invention uses the denitrification biomembrane as the secondary seed sludge and starts the anaerobic ammoxidation reactor within 100d successfully; under the condition that the inflow water contains 1-1.5mg / l of dissolved oxygen, the method provided by the invention can domesticate microflora in which the aerobic bacteria and anaerobic bacteria are co-existing. The method provided by the invention reduces the operation temperature of the anaerobic ammoxidation reactor from 35 DEG C to (19-22) DEG C, and greatly reduces the operation cost; meanwhile, the reactor system still operates stably and realizes high denitrification effect.

Description

technical field [0001] The invention relates to a method for starting and acclimating a reactor. Background technique [0002] Anammox is a kind of NH 4 + as electron donor, with NO 2 - Generate N for electron acceptor 2 The process has a good development and application prospect in the field of sewage biological denitrification. The biggest problem faced by the anammox process is: slow growth of anammox bacteria, long generation time, doubling time of 11 days, and low cell yield of 0.11gVSS / gNH 4 + -N, the enrichment time of the anammox reactor is very long, generally 1 to 1.5 years, and the enrichment efficiency of anammox bacteria is low. For slow-growing strains, maintaining their number in the reactor is crucial for successful enrichment, that is, the ability of the reactor to retain sludge often determines whether the enrichment of anammox bacteria can be successful. The use of biofilm reactors can effectively retain microorganisms and completely separate the h...

AI Technical Summary

Problems solved by technology

The biggest problem faced by the anammox process is: slow growth of anammox bacteria, long generation time, doubling time of 11 days, and low cell yield of 0.11gVSS / gNH 4 + -N, the enrichment time of the anammox reactor is very long, generally 1 to 1.5 years, and the enrichment efficiency of anammox bacteria is low

[0003] On the other hand, as a follow-up process of short-cut nitrification, the anammox process will inevitably be affected by the dissolved oxygen contained in the short-cut nitrification water. At the same time, the conventional anammox process needs to control the water temperature at about 35°C, which consumes a lot of energy. , the operating cost is high, so it is particularly important to study the anaerobic ammonium oxidation process at room temperature and low dissolved oxygen influent, and so far no reports on this aspect have been found

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