Hose type circulating integrated denitrification reactor and method

Abstract

The invention discloses a hose type circulating integrated denitrification reactor and a method. A main bo,dy of the reactor is a ring-type hose and comprises a water distribution zone, a reaction zone and a separation zone. The water distribution area is provided with a water inlet pipe, a round strainer and a gas supply needle; the reaction zone is provided with an aerobic section, an anoxic section, an exhaust pipe, an upper diversion pipe and a lower diversion pipe; the separation zone is provided with a three-phase separator, an air pressure balance pipe and a reverse outflow pipe. The reactor disclosed by the invention consists of the ring-type hose and a joint, and lengths and liquid levels of the aerobic section and the anoxic section of the reaction zone can be flexibly adjusted according to needs; the aerobic section conducts aeration and provides oxygen, gas and water are mixed partially, and the reactor is in a closed long tube shape, conducts overall plug-flow, combines with advantages of full mixing and plug-flow pattern; supply of gas and production of the gas drive a mixed liquor to circulate along the reactor, and uniform distribution of granular sludge and full contact of a matrix and functional bacteria can be promoted; after the mixed liquor is subjected to three-phase separation in the separation zone, water flows out reversely, retention of the granular sludge is benefited, and a nitrogen removal function of the reactor is enhanced.

Description

technical field [0001] The invention relates to an integrated reactor, in particular to a hose-type circulating integrated denitrification reactor and a method. Background technique [0002] As a new biological denitrification technology, anaerobic ammonia oxidation technology has rapidly become a research and application hotspot in the field of wastewater biological treatment due to its low-cost economic advantages. At present, more than 100 sewage treatment plants around the world have adopted the anammox process. Since most of the nitrogen in wastewater exists in the form of ammonium nitrogen and the content of nitrite nitrogen is low, from the perspective of process principle, most anammox processes first use short-range nitrification to convert part of ammonium nitrogen into Nitrite nitrogen, followed by anaerobic ammonium oxidation reaction, so as to achieve the purpose of final denitrification. [0003] From a structural point of view, part of the anammox process us...

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Problems solved by technology

Secondly, ammonia oxidizing bacteria produce acid, and anammox bacteria produce alkali. The difficulty is that the acid-base of the reaction system is not easy to balance.

Furthermore, under the premise of the presence of nitrite and dissolved oxygen, nitrifying bacteria will compete with anammox bacteria for substrates. The difficulty lies in the fact that the reaction system is not easy to inhibit or eliminate nitrifying bacteria

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