Rapid starting method of efficient autotrophic nitrogen removal system used for treating high-ammonia nitrogen wastewater

Abstract

The invention discloses a rapid starting method of an efficient autotrophic nitrogen removal system used for treating high-ammonia nitrogen wastewater, and belongs to the technical field of wastewaterbiological nitrogen removal. The problems are solved that in the prior art, a related system needs to occupy a large land, the inoculation amount is too large, starting time is long, the nitrogen removal load is low, impact resistance is poor, and the system is easily affected by water-entering organic matter. Pure film denitrificaiton is combined with mud film one-part form autotrophic nitrogenremoval, a denitrification pond is arranged in the front, an autotrophic nitrogen removal pond is arranged in the rear, and outgoing water returns. Three operation modes of the rapid starting method can be realized and include the parallel operation mode, the double-series A operation mode and the double-series B operation mode, the water outlet direction of four reaction ponds is controlled through a communication valve, and therefore the reaction ponds are connected in series or in parallel or operate independently; by means of inoculation, fed-batch and others, rapid starting of the technology is realized; according to treatment requirements, different technological arrangement modes are realized. The rapid starting method has the advantages that occupied land is small, the inoculationproportion is small, starting is rapid, the nitrogen removal load is high, the impact resistance is high, and resistance to water-entering organic matter is good.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological denitrification, and in particular relates to a quick-start method for an efficient autotrophic denitrification system for treating high-ammonia-nitrogen wastewater. Background technique [0002] As a new denitrification process that has developed rapidly in recent years, autotrophic denitrification technology has attracted the attention of researchers in the field of wastewater biological denitrification all over the world. Compared with traditional nitrification and denitrification, this process can save 62.5% of oxygen supply energy consumption and 100% Therefore, it is considered to be the most economical and effective way of biological denitrification of wastewater. In the one-stage autotrophic denitrification process, nitrite oxidizing bacteria (AOB) and anaerobic ammonium oxidizing bacteria (AnAOB) are enriched in the same reactor by limiting oxygen, and efficient denitrificat...

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Problems solved by technology

Although the inoculation rate of this technology is low and the startup time is fast, the NH removed by the system in the stable phase 4 + -N and generated NO 3 - The ratio of -N is 8%-15%, which has a certain gap with the chemical ratio (11%). Generally speaking, the system feed water contains a certain amount of BOD 5 It will lead to the occurrence of denitrification phenomenon and cause the ratio to be too small, and the existence of certain nitrite oxidizing bacteria (NOB) in the system will make the ratio too large. It is worth noting that the existence of NOB will compete with AnAOB for nitrous acid The salt matrix makes AnAOB lack a suitable matrix ratio, causing the system to collapse; in addition, the high concentration of ammonia nitrogen in the influent water used by this technology and the large amount of water lead to a high total nitrogen removal load, but the concentration of ammonia nitrogen in the effluent still reaches about 150 mg/L, which cannot be approached. High treatment requirements. In addition, this process has no nitrate nitrogen treatment step, which cannot solve the total nitrogen in the effluent. For projects with high requirements for total nitrogen in the effluent, other processes need to continue to process

[0010] CN108083581A discloses a low-energy autotrophic denitrification municipal sewage treatment system and method, which adopts the form of serial anaerobic decarburization-autotrophic denitrification to first inoculate the residual sludge of the sewage treatment plant to start the anaerobic carbon removal reactor, and the anaerobic decarbonization reactor involved The start-up process of the oxygen decarbonization reactor takes 60-90 days, and the subsequent start-up process of the autotrophic denitrification reactor needs to inoculate the whole pool with 3000 mg/L anammox sludge for early anaerobic start-up, and artificially distribute water to meet the anaerobic requirements. Ammonia oxidizing bacteria substrate requirements, the reactor start-up process takes 90-120 days, and the whole process starts up 150-210 days. The pre-anaerobic decarbonization tank of this method uses a sludge system, and it is

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