KR-102959251-B1 - Water Treatment System

KR102959251B1KR 102959251 B1KR102959251 B1KR 102959251B1KR-102959251-B1

Abstract

A water treatment system comprises: a reaction tank comprising at least one of an anoxic tank for removing nitrogen components through a denitrification reaction of the influent and an anaerobic tank for releasing phosphorus, wherein nitrification, phosphorus absorption, and decomposition of organic matter are performed on the influent flowing in from one of the anoxic tank and the anaerobic tank; an air supply unit connected to the reaction tank to supply air to the reaction tank to supply oxygen to microorganisms for decomposing the organic matter; a sedimentation tank for separating the influent into supernatant and activated sludge when the discharged influent flows in; a degassing unit for degassing the activated sludge flowing in from the reaction tank or the sedimentation tank; and a sensor unit for collecting information provided in at least one of the anoxic tank, anaerobic tank and aerobic tank, sedimentation tank and degassing unit constituting the reaction tank.

Inventors

이건호

Assignees

주식회사 로스웰워터

Dates

Publication Date: 20260508
Application Date: 20241008

Claims (7)

In water treatment systems, A reaction tank comprising, when influent water to be treated flows in, discharges the influent water after performing water treatment, and includes at least one of an anoxic tank for removing nitrogen components through a denitrification reaction of the influent water and an anaerobic tank for releasing phosphorus, and includes an aerobic tank in which nitrification, phosphorus absorption, and decomposition of organic matter are performed on the influent water flowing in from one of the anoxic tank and the anaerobic tank; An air supply unit connected to the above reaction vessel to supply air to the reaction vessel in order to supply oxygen to microorganisms for decomposing the organic matter; A sedimentation tank that separates the influent into supernatant and activated sludge when the discharged influent is introduced; A degassing unit for degassing activated sludge flowing in from the above reaction tank or the above sedimentation tank; and A sensor unit for collecting information, provided in at least one of the anoxic tank, anaerobic tank and aerobic tank, sedimentation tank and degassing unit constituting the above reaction tank; Includes, The above degassing unit is, A pressure pump that applies pressure to activated sludge flowing in through an injection line from either the reaction tank or the sedimentation tank and injects it into a hydrocyclone; The hydrocyclone that degasses the activated sludge to separate it into a degassed liquid and degassed sludge, returns the degassed liquid through a first return line connected to at least one of the aerobic tank and the sedimentation tank included in the reaction tank, and returns the degassed sludge through a second return line connected to at least one of the anoxic tank and the anaerobic tank; A flow rate control unit provided on one side of the first return line to which the above-mentioned detachment is returned, for controlling the flow rate of the detachment returned based on the measurement value of the sensor unit; Controlling the above-mentioned pressure pump to control the amount of activated sludge injected into the hydrocyclone, measuring the sludge concentration and oxygen concentration of the aerobic tank included in the reaction tank to regulate the flow rate of the degassed liquid returned from the hydrocyclone through the first return line, and controlling a flow rate control unit to stop the supply of the degassed liquid flowing through the first return line when the sludge concentration and oxygen concentration of the aerobic tank reach a pre-entered reference value, and controlling the flow rate of the influent raw water flowing into the reaction tank and the flow rate of the degassed sludge returned from the hydrocyclone through the second return line, wherein the sensor unit continuously measures water quality indicators including at least one of MLSS, DO, oxygen concentration, and NO3 for the influent raw water flowing into the reaction tank, the inside of the reaction tank, the activated sludge flowing in through the hydrocyclone injection line, and the degassed liquid returned through the first return line, and based on the measured information, the air supply unit by a pre-entered program A control unit that calculates operating time and airflow rate; and A connecting line, wherein one end is connected to the flow rate control unit and the other end is connected to one side of the second return line, so as to supply the deleaded liquid flowing through the first return line to the second return line according to a signal from the control unit based on information measured by the sensor unit, and wherein when the oxygen concentration and sludge concentration of the aerobic tank based on information measured by the sensor unit achieve a reference value previously entered into the control unit, the supply of the deleaded liquid flowing through the first return line is stopped according to a signal from the control unit, and the deleaded liquid is supplied to the second return line together with the degassed sludge; A water treatment system including
In paragraph 1, A water treatment system in which the sensor unit is provided on one side of at least one of the inflow line into which the inflow water flows, the first return line, and the second return line, measures the MLSS and DO of the fluid flowing inside the line, and transmits the measured information to the control unit.
In paragraph 1, A water treatment system in which the sensor unit is provided on one side of at least one of the anaerobic tank, the anoxic tank, and the aerobic tank included in the reaction tank, measures the MLSS and DO of the contents being treated, and transmits the measured information to the control unit.
In paragraph 1, The sensor unit includes an ORP sensor provided in the anaerobic tank, and The above control unit is a water treatment system that controls the flow rate of the influent water and the flow rate of the degassed sludge returned through the second return line based on measurement information transmitted from the ORP sensor.
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In paragraph 1, A water treatment system further comprising a scum trough provided on one side of the sedimentation tank to collect scum suspended in the sedimentation tank.
In paragraph 6, A water treatment system further comprising a scum return line that connects the scum trough to one side of an injection line that supplies the scum to the hydrocyclone to treat the scum collected in the sedimentation tank, and provides a path for the scum to flow.

Description

Water Treatment System The present invention relates to a water treatment system, and more specifically, to a water treatment system that can maximize the efficiency and energy efficiency of the water treatment system by including a return sludge degassing device, calculating the oxygen concentration inside the reaction tank that changes according to the oxygen concentration dissolved in the degassed liquid returned to the reaction tank, and controlling the cyclone flow rate and an air supply unit that supplies air to the reaction tank according to the calculated information. In the biological removal of nitrogen and phosphorus from sewage and wastewater, air is supplied to an aerobic tank to activate microorganisms that consume organic matter, and a portion of the activated sludge suspension (sewage liquid) within the aerobic tank is internally returned to an anoxic tank to be used for the purpose of removing nitrogen components. Most of the final settled sludge is externally returned to the reaction tank of the previous stage and used in the process of biologically removing organic matter and phosphorus. This sludge return is a very important unit process in the biological treatment process, but it occupies a relatively large reactor space compared to its effectiveness, so when considering expansion, there are many problems that need improvement from a technical perspective. In addition, in the aerobic tank where organic matter is aerated, the dissolved oxygen inside the tank must be maintained at an appropriate level to enhance the activity of the organic matter. To this end, air must be supplied to maintain the dissolved oxygen inside the aerobic tank. Conventionally, the control of dissolved oxygen in aerobic tanks relied on the operator's senses and experience to operate air supply devices such as blowers. However, since the dissolved oxygen in aerobic tanks changes in real time depending on the surrounding environment, the condition of the wastewater, and the progress of the water treatment process, there is a problem that there are limitations to manual operation by the user. Consequently, there is a problem in that the activity of microorganisms decreases as the dissolved oxygen in the aerobic tank decreases, or conversely, when air is continuously supplied while there is sufficient dissolved oxygen in the aerobic tank, energy consumption increases rapidly due to the unnecessary operation of the air supply device, leading to higher maintenance costs. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a schematic block diagram showing the configuration of a water treatment system according to the present invention; FIG. 2 is a schematic diagram of the configuration of a degassing unit included in a water treatment system according to the present invention; FIGS. 3 to 6 are drawings showing the schematic configuration of a water treatment system according to an embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims. The terms used in this specification are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The terms "comprises" and/or "comprising" used in this specification do not exclude the presence or addition of one or more other components in addition to the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and "and/or" includes each of the mentioned components and all combinations of one or more. Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish them from a single component. Therefore, the first component mentioned below may be the second component within the technical scope of the invention. Unless otherwise defined, all terms used herein (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the pr