KR950013997A - Biological sewage and wastewater treatment device combined with nitrogen and phosphorus removal and its treatment method - Google Patents

Abstract

[Objective] The present invention provides an apparatus and method for effectively and comprehensively treating not only organic pollutants but also nutrients such as nitrogen and phosphorus in treating organic industrial wastewater containing nitrogen and phosphorus or urban sewage. It is for.

[Configuration] An apparatus for biologically treating wastewater in organic wastes, having a median layer 13, which is returned from an anoxic tank 11 and an influent or intake tank 2 for securing high concentrations of denitrifying bacteria and inducing denitrification. An anaerobic tank (12) is installed in the upper and lower parts of the separation reactor (1) to maximize desorption by securing dephosphorized microorganisms, and in contrast to operating conditions such as SRT and MLSS to induce smooth phosphorus absorption and nitrification in the aeration tank. In-hopper water tank (2) and nitrification tank (4) having a separate installation, in which the organic matter flows into the lower and lower parts of the separation reaction tank in the anaerobic conditions decomposed by fermentation substrate easy to be decomposed by microorganisms, floating and denitrification By providing a substrate that is easy to denitrification in the bath, it is possible to achieve a high rate of denitrification, and then to reduce the load of organic matter and nitrate concentration in the aerobic state, thereby reducing phosphorus absorption and nitrification rate. In order to increase the flow rate, the return slot of the intake tank, which has completed the intake of water, flows into the lower and lower ends of the separation reaction tank to be solid-liquid separated by gravity sedimentation to form a high density sludge blanket, and to provide a more perfect anaerobic condition while going to the bottom of the blanket. It enhances the phosphorus release effect and allows the sludge blanket to be removed by some anaerobic microorganisms while passing through the upper layer even if a certain amount of nitric oxide or DO is introduced, and the supernatant separated from the second liquid sedimentation tank after the nitrification is completed. Minimize the inhibitory factors of anaerobic conditions for phosphorus release by upflow immediately after inflow, and also shorten the HRT and SRT of the intake tank and increase the F / M ratio. Maximization of phosphorus absorption, lengthening HRT and SRT of nitrifier, and low F / M ratio Hameuroseo ever the nitrification microorganisms present in the dominant species in the Garden is to maximize the nitrification.

[Selectivity] First Degree

Description

Biological sewage and wastewater treatment device combined with nitrogen and phosphorus removal and its treatment method

Since this is an open matter, no full text was included.

1 is a conceptual diagram of a biological sewage and wastewater treatment apparatus according to the present invention.

Claims (9)

In an apparatus for biologically treating organic wastewater and wastewater, an anoxic tank 11 for denitrification and an anaerobic tank 12 for phosphorus discharge are installed on the upper and lower portions of the separation reaction tank 1 so as to smoothly absorb water in the aeration tank. And nitrogen, phosphorus removal and biological wastewater, wastewater treatment apparatus, characterized in that configured to operate by separating and installing the phosphorus absorption tank (2) and the nitrification tank (4) having opposing operating conditions such as SRT, MLSS to induce nitrification. The method of claim 1, wherein the anaerobic tank (11) is filled with a medium to secure a high concentration of denitrification microorganisms to induce denitrification, combined biological removal, wastewater treatment apparatus. The wastewater treatment apparatus according to claim 1, wherein the stirrer (13) is provided in the anaerobic tank (12). The nitrogen, phosphorus removal combined biological, wastewater and wastewater treatment apparatus according to claim 1, wherein the anaerobic tank (12) secures a large amount of dephosphorus microorganisms returned from the intake tank (2) to maximize phosphorus release. According to claim 1, separation reactor (1) and anaerobic tank (12) performs dephosphorization while dephosphorization microorganisms circulate, nitrification microorganism is immobilized in the nitrification tank (4) to cause a high rate of nitrification tank, nitrification microorganism The nitrogen and phosphorus removal is characterized in that the high-density denitrification reaction is carried out by attaching or capturing at high concentration to the median layer 13 of the anoxic tank 11 so that phosphorus removal, nitrification and denitrification reaction proceed under different optimum conditions. Combined biological sewage and wastewater treatment system. The organic material is introduced into the lower and lower part of the separation reaction tank to be decomposed and fermented into a fermentation substrate that is easily decomposed by microorganisms under anaerobic conditions, so that the denitrification reaction can be provided as a substrate that facilitates the denitrification reaction. Nitrogen, phosphorus removal combined biological load, wastewater treatment method to reduce the organic load in the state to increase the nitrification rate. Returning sludge of the immersion tank after the immersion is completed into the lower and lower ends of some separation reactors and separated into solid by gravity sedimentation to form a high density sludge blanket, and go to the bottom of the blanket to provide more perfect narrowing conditions. Nitrogen, phosphorus removal combined biological load, which enhances the effect and ensures that the sludge volcanet is removed by some anaerobic microorganisms as it passes through the top layer even if some nitrogen oxide or DO is introduced. Wastewater treatment method. After nitrification is completed, the nitrification tank treated with solid solution in the secondary sedimentation tank is introduced into the lower part of the median layer of the separation reactor for denitrification, and as a direct flow, it minimizes the inhibitory factors of anaerobic conditions for phosphorus release. Nitrogen, phosphorus removal combined biological load, wastewater treatment method characterized in that to increase the nitrification rate by maintaining the high concentration of nitrification bacteria by internal transport to the nitrification tank. The SRT of the intake tank is short and the F / W ratio is high to maintain the growth stage of the microorganisms as an algebraic multiplier to maximize phosphorus uptake, while the SRT of the nitrification tank is operated long and the F / M ratio is low, so Nitrogen, phosphorus removal biological wastewater and wastewater treatment method which maximizes nitrification by oxidizing microorganisms. ※ Note: This is to be disclosed based on the first application.