Monitoring system for toxicity of inlet water of sewage treatment plant

Abstract

The utility model relates to the field of sewage treatment, in particular to a system for monitoring the toxicity of inlet water of a sewage treatment plant. Comprising a biochemical sludge reactor, a biochemical sewage activity monitoring reactor, a sludge sampling pump, a sewage sampling pump, a sludge inlet pipe, a water inlet pipe, a sludge inlet pipe, a sewage inlet pipe, a manual ball valve, an electric valve, a sludge flow switch, a sewage flow switch, a dissolved oxygen meter, a stirrer, an overflow emptying collecting pipe, a micro aerator and a PLC (Programmable Logic Controller) control system. By monitoring the toxicity of the inlet water, the water quality condition of the inlet water of the sewage plant can be mastered in real time, judgment is made according to the monitoring result, corresponding countermeasures are taken quickly, the inhibition effect of toxic substances on the activity of biochemical sludge is reduced as much as possible, and the quality of the outlet water is ensured to reach the standard.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a monitoring system for the toxicity of influent to a sewage treatment plant. The novel influent toxicity monitoring system is used to detect whether the influent to the sewage treatment plant is toxic. Background Art

[0002] The activated sludge process, a widely used method in wastewater treatment, has attracted widespread attention due to its simple process flow, low operating costs, and easy maintenance and management. However, due to the complex composition of wastewater, toxic substances in the wastewater can inhibit the activity of the biochemical sludge, leading to instability in the biochemical system, substandard effluent quality, and even complete system collapse, significantly impacting the operation and management of wastewater treatment plants.

[0003] Therefore, a sewage treatment plant influent toxicity monitoring system is developed to detect whether the sewage treatment plant influent is toxic. By monitoring the influent toxicity, the influent water quality of the sewage treatment plant can be grasped in real time, and judgments can be made based on the monitoring results. Appropriate response measures can be taken quickly to minimize the inhibitory effect of toxic substances on the activity of biochemical sludge and ensure that the effluent water quality meets the standards. It has broad application prospects and value. Utility Model Content

[0004] The purpose of this utility model is to provide a monitoring system for the toxicity of influent of a sewage treatment plant, aiming to overcome the defects of the existing technology and solve the problem that toxic substances in sewage may inhibit the activity of biochemical sludge, thereby causing instability of the biochemical system, substandard effluent quality, and even collapse of the entire biochemical system.

[0005] To this end, the utility model proposes a monitoring system for influent toxicity of a sewage treatment plant, comprising: a biochemical sludge reactor, a biochemical sewage activity monitoring reactor, a first micro-aerator, a second micro-aerator, a sludge sampling pump, a sewage sampling pump and a PLC control system; the sludge sampling pump is connected to the biochemical sludge reactor via a sludge inlet pipe, and the first micro-aerator is connected to the biochemical sludge reactor via a sludge air inlet pipe; the sewage sampling pump is connected to the biochemical sewage activity monitoring reactor via a water inlet pipe, and the second micro-aerator is connected to the sewage air inlet pipe, respectively; an overflow pipe 1 is further provided in parallel on the sludge inlet pipe, and an overflow pipe 2 is provided in parallel on the water inlet pipe; wherein electric valves are installed on the sludge inlet pipe, the sludge air inlet pipe, the water inlet pipe and the sewage air inlet pipe; a dissolved oxygen meter is provided on the side wall of the biochemical sewage activity monitoring reactor, and the first micro-aerator, the second micro-aerator, the sludge sampling pump, the sewage sampling pump, the electric valve and the dissolved oxygen meter are electrically connected to the PLC control system respectively.

[0006] As a preferred technical solution of the present application, a sludge flow switch is installed on the overflow pipe 1, and the sludge flow switch is electrically connected to the PLC control system.

[0007] As a preferred technical solution of the present application, a sewage flow switch is installed on the overflow pipe 2, and the sewage flow switch is electrically connected to the PLC control system.

[0008] As a preferred technical solution of the present application, the biochemical sewage activity monitoring reactor is provided with a stirrer, and the stirrer is electrically connected to the PLC control system.

[0009] As a preferred technical solution of the present application, manual ball valves are installed on the sludge inlet pipe, sludge air inlet pipe, water inlet pipe and sewage air inlet pipe.

[0010] As a preferred technical solution of the present application, the water inlet pipe and the sludge inlet pipe are connected via a connecting pipe 1, and a manual ball valve and an electric valve are installed in the connecting pipe 1.

[0011] As a preferred technical solution of the present application, the output end of the biochemical sludge reactor is connected to the biochemical sewage activity monitoring reactor through a second connecting pipe.

[0012] As a preferred technical solution of the present application, the upper end of the biochemical sewage activity monitoring reactor is still provided with an overflow exhaust pipe.

[0013] As a preferred technical solution of the present application, the overflow pipe 1, the overflow pipe 2 and the overflow exhaust pipe are connected in parallel to the overflow emptying collection pipe and discharged through the overflow outlet.

[0014] As a preferred technical solution of the present application, the sewage outlet at the bottom of the biochemical sewage activity monitoring reactor is also connected in parallel to the overflow drain collection pipe through a pipeline.

[0015] This utility model provides a sewage treatment plant influent toxicity monitoring system that detects the toxicity of the plant's influent. By monitoring influent toxicity, the system can assess the plant's influent quality in real time. Based on the monitoring results, the system can quickly implement appropriate countermeasures to minimize the inhibitory effects of toxic substances on biochemical sludge activity and ensure that effluent quality meets standards. This technology, based on the real-time sludge concentration in the biochemical tank and the influent water quality monitoring principle of the biochemical sludge specific oxygen consumption rate (SOUR), detects influent toxicity in sewage treatment plants and guides production and operation control at sewage treatment plants.

[0016] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the monitoring system for the toxicity of influent to a sewage treatment plant according to the present invention;

[0019] Explanation of the accompanying symbols: 1. Biochemical sludge reactor; 2. Biochemical sewage activity monitoring reactor; 3. Sludge sampling pump; 4. Sewage sampling pump; 5. Mud inlet pipe; 6. Water inlet pipe; 7. Sludge air inlet pipe; 8. Sewage air inlet pipe; 9. Manual ball valve; 10. Electric valve; 11. Sludge flow switch; 12. Sewage flow switch; 13. Dissolved oxygen meter; 14. Agitator; 15. Overflow emptying collection pipe; 18. Micro aerator 1; 17. PLC control system; 16. Micro aerator 2. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] like Figure 1 As shown, the monitoring system for influent toxicity of a sewage treatment plant of the present invention includes: a biochemical sludge reactor 1, a biochemical sewage activity monitoring reactor 2, a sludge sampling pump 3, a sewage sampling pump 4, a sludge inlet pipe 5, a water inlet pipe 6, a sludge air inlet pipe 7, a sewage air inlet pipe 8, a sludge flow switch 11, a sewage flow switch 12, a dissolved oxygen meter 13, an agitator 14, an overflow emptying collection pipe 15, a PLC control system 17, two micro aerators, a plurality of manual ball valves 9 and a plurality of electric valves 10.

[0022] The sludge sampling pump is connected to the biochemical sludge reactor via the sludge inlet pipe. The sewage sampling pump is connected to the biochemical sewage activity monitoring reactor via the water inlet pipe. The micro-aerator is connected to the biochemical sludge reactor via the sludge inlet pipe. The micro-aerator is connected to the biochemical sewage activity monitoring reactor via the sewage inlet pipe. The dissolved oxygen meter and agitator are installed in the biochemical sewage activity monitoring reactor. Manual valves are installed on the air inlet pipe, sludge inlet pipe, water inlet pipe, and drain pipe. Electric valves are installed on the air inlet pipe, sludge inlet pipe, water inlet pipe, and drain pipe. A PLC control system controls the micro-aerator, agitator, sludge inlet pump, water inlet pump, and electric valves, generating relevant reports and data, including toxicity test results.

[0023] Specifically, the sludge sampling pump 3 inputs sludge into the biochemical sludge reactor 1 through the sludge inlet pipe 5, and the micro aerator 18 inputs gas to the bottom of the biochemical sludge reactor 1 through the sludge air inlet pipe 7 to complete aeration. Among them, the sludge inlet pipe 5 and the sludge air inlet pipe 7 are both installed with a manual ball valve 9 and an electric valve 10.

[0024] The sewage sampling pump 4 inputs sewage into the biochemical sewage activity monitoring reactor 2 through the water inlet pipe 6, and the micro aerator 16 inputs gas to the bottom of the biochemical sewage activity monitoring reactor 2 through the sewage air inlet pipe 8 to complete aeration. Among them, a manual ball valve 9 and an electric valve 10 are installed on both the water inlet pipe 6 and the sewage air inlet pipe 8.

[0025] The water inlet pipe 6 and the sludge inlet pipe 5 are connected by a connecting pipe 1, and a manual ball valve 9 and an electric valve 10 are installed in the connecting pipe 1. When one of the sludge sampling pump 3 or the sewage sampling pump 4 fails, the normal operation of the entire system can also be ensured by controlling the switch of the electric valve 10.

[0026] The output end of biochemical sludge reactor 1 is connected to biochemical wastewater activity monitoring reactor 2 via connecting pipe 2, which delivers aerated wastewater to the reactor. A dissolved oxygen meter 13 is installed on the sidewall of the reactor 2 to measure various wastewater parameters and monitor influent toxicity. A stirrer 14 is also installed on the reactor 2 to maintain a consistent wastewater concentration between the upper and lower layers, improving detection accuracy.

[0027] An overflow pipe 1 is also arranged in parallel on the sludge inlet pipe 5, and a sludge flow switch 11 is installed on the overflow pipe 1. Similarly, an overflow pipe 2 is arranged in parallel on the water inlet pipe 6, and a sewage flow switch 12 is installed on the overflow pipe 2. In addition, there is an overflow exhaust pipe at the upper end of the biochemical sewage activity monitoring reactor 2. Overflow pipe 1, overflow pipe 2 and overflow exhaust pipe are connected in parallel to the overflow emptying collection pipe 15 and discharged through the overflow outlet. The sewage outlet at the bottom of the biochemical sewage activity monitoring reactor 2 is also connected in parallel to the overflow emptying collection pipe 15 through a pipeline.

[0028] In this embodiment, micro aerator 1, micro aerator 2, sludge sampling pump 3, sewage sampling pump 4, sludge flow switch 11, sewage flow switch 12, dissolved oxygen meter 13, and agitator 14 are electrically connected to the PLC control system respectively, and the operation of each electrical component is controlled by the PLC control system to realize the monitoring of the water toxicity of the entire monitoring system.

[0029] When the inlet water toxicity monitoring system is working, the electric valves 10 of the sludge inlet pipe 5 and the sewage inlet pipe 6 are opened first. Next, the sludge sampling pump 3 and the sewage sampling pump 4 are turned on to transport the sludge to the biochemical sludge reactor 1 and the sewage to the biochemical sewage activity monitoring reactor 2; next, the sludge sampling pump 3 and the sewage sampling pump 4 are turned off, and the electric valve 10 is closed; next, the electric valves on the micro aerator 1 18, the micro aerator 2 16, the sludge air inlet pipe 7 and the sewage air inlet pipe 8 are opened to supply air to the biochemical sludge reactor 1 and the biochemical sewage activity monitoring reactor 2 respectively; next, the electric valves on the micro aerator 1 18, the micro aerator 2 16, the sludge air inlet pipe 7 and the sewage air inlet pipe 8 are closed; next, the electric valve at the bottom of the biochemical sludge reactor 1 is opened, and the sludge enters the biochemical sewage activity monitoring reactor 2; next, the agitator 14 in the biochemical sewage activity monitoring reactor 2 is turned on, and the dissolved oxygen meter 13 reads data in real time; next, the biochemical sludge reactor 1 and the sludge enter the biochemical sewage activity monitoring reactor 2, and the electric valve on the overflow emptying collection pipe 15 is opened and emptied.

[0030] The entire system is controlled by a PLC control system. The PLC collects DO data for each batch and automatically calculates the oxygen consumption rate (K) of the biochemical sludge. It then determines the data confidence level (R2). The accuracy of the oxygen decay rate (K) is verified based on the R2 value. A value greater than 0.98 indicates a relatively accurate decay rate (K). Once accurate biochemical sludge oxygen consumption rate data is obtained, the specific oxygen utilization rate (SOUR) of the biochemical sludge can be further calculated. The SOUR value is used to determine the toxicity of the influent.

[0031] The utility model proposes a sewage treatment plant influent toxicity monitoring system, comprising a biochemical sludge reactor, a biochemical sewage activity monitoring reactor, a sludge sampling pump, a sewage sampling pump, a sludge inlet pipe, a water inlet pipe, a sludge air inlet pipe, a sewage air inlet pipe, a manual ball valve, an electric valve, a sludge flow switch, a sewage flow switch, a dissolved oxygen meter, an agitator, an overflow emptying collection pipe, a micro aerator, and a PLC control system. By monitoring influent toxicity, the influent water quality of the sewage treatment plant can be monitored in real time. Based on the monitoring results, judgments can be made and corresponding countermeasures can be quickly taken to minimize the inhibitory effect of toxic substances on biochemical sludge activity and ensure that the effluent quality meets the standards.

[0032] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A monitoring system for the toxicity of influent in a sewage treatment plant, characterized in that: include: Biochemical sludge reactor (1), biochemical sewage activity monitoring reactor (2), micro aerator 1 (18), micro aerator 2 (16), sludge sampling pump (3), sewage sampling pump (4) and PLC control system (17); The sludge sampling pump (3) is connected to the biochemical sludge reactor (1) through the sludge inlet pipe (5), and the micro aerator (18) is connected to the biochemical sludge reactor (1) through the sludge air inlet pipe (7); the sewage sampling pump (4) is connected to the biochemical sewage activity monitoring reactor (2) through the water inlet pipe (6), and the micro aerator (2) is connected to the sewage air inlet pipe (8). An overflow pipe (1) is also provided in parallel on the sludge inlet pipe (5), and an overflow pipe (2) is provided in parallel on the water inlet pipe (6); The sludge inlet pipe (5), the sludge air inlet pipe (7), the water inlet pipe (6) and the sewage air inlet pipe (8) are all equipped with electric valves (10); a dissolved oxygen meter (13) is provided on the side wall of the biochemical sewage activity monitoring reactor (2); and the first micro aerator, the second micro aerator, the sludge sampling pump (3), the sewage sampling pump (4), the electric valve (10) and the dissolved oxygen meter (13) are respectively electrically connected to the PLC control system.

2. The sewage treatment plant influent toxicity monitoring system according to claim 1, characterized in that: A sludge flow switch (11) is installed on the overflow pipe 1, and the sludge flow switch (11) is electrically connected to the PLC control system.

3. The monitoring system for influent toxicity of a sewage treatment plant according to claim 1, characterized in that: A sewage flow switch (12) is installed on the overflow pipe 2, and the sewage flow switch (12) is electrically connected to the PLC control system.

4. The monitoring system for influent toxicity of a sewage treatment plant according to claim 1, characterized in that: The biochemical sewage activity monitoring reactor (2) is provided with a stirrer (14), and the stirrer (14) is electrically connected to the PLC control system.

5. The monitoring system for influent toxicity of a sewage treatment plant according to claim 1, characterized in that: Manual ball valves (9) are installed on the sludge inlet pipe (5), the sludge air inlet pipe (7), the water inlet pipe (6) and the sewage air inlet pipe (8).

6. The sewage treatment plant influent toxicity monitoring system according to claim 1, characterized in that: The water inlet pipe (6) and the sludge inlet pipe (5) are connected via a connecting pipe 1, and a manual ball valve (9) and an electric valve (10) are installed in the connecting pipe 1.

7. The monitoring system for influent toxicity of a sewage treatment plant according to claim 1, characterized in that: The output end of the biochemical sludge reactor (1) is connected to the biochemical sewage activity monitoring reactor (2) via a second connecting pipe.

8. The monitoring system for influent toxicity of a sewage treatment plant according to claim 1, characterized in that: The upper end of the biochemical sewage activity monitoring reactor (2) is also provided with an overflow exhaust pipe.

9. The sewage treatment plant influent toxicity monitoring system according to claim 8, characterized in that: The overflow pipe 1, overflow pipe 2 and overflow exhaust pipe are connected in parallel to the overflow emptying collection pipe (15) and discharged through the overflow outlet.

10. The monitoring system for influent toxicity of a sewage treatment plant according to claim 9, characterized in that: The sewage outlet at the bottom of the biochemical sewage activity monitoring reactor (2) is also connected in parallel to the overflow emptying collection pipe (15) through a pipeline.

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