A comprehensive analysis system and measurement method for ozone treatment of organic wastewater

Abstract

The invention discloses an ozone-treated organic wastewater comprehensive analysis system and a measurement method, comprising the ozone-treated organic wastewater comprehensive analysis system, an oxygen generator, an ozone generator, an ozone detector, a pump, a water inlet storage tank, an ozone destroyer, an ozone detector and a water outlet storage tank, wherein the air inlet of the ozone-treated organic wastewater comprehensive analysis system is connected to the ozone detector, the ozone detector is connected to the ozone generator, the ozone generator is connected to the oxygen generator, and the water inlet of the ozone-treated organic wastewater comprehensive analysis system is connected to the pump; the problem of ozone catalyst performance detection in the process of ozone catalytic oxidation of organic wastewater in a polluted environment is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and specifically relates to a comprehensive analysis system and a measurement method for ozone-treated organic wastewater. Background Art

[0002] In order to solve the problem of organic wastewater pollution in the environment, people are more willing to use clean, efficient and pollution-free technologies to treat organic wastewater. Ozone technology in advanced oxidation processes can quickly oxidize and decompose organic pollutants in wastewater. The oxygen produced after decomposition is harmless to the human body. Therefore, ozone is widely used in the field of organic wastewater treatment. The oxidation potential of ozone is 2.07V, while the oxidation potential of hydroxyl radicals is 2.80V. Therefore, industry usually uses ozone catalysts to decompose ozone to produce more hydroxyl radicals to degrade organic matter. The performance evaluation of catalysts in ozone catalytic oxidation processes has become a key criterion for industrial applications.

[0003] At present, in wastewater treatment, the economic benefits of ozone catalytic processes are mainly measured by the power consumption for producing ozone, the removal rate of wastewater COD by ozone catalytic oxidation, and the service life of the ozone catalyst. However, the optimization of reaction conditions such as ozone concentration and treatment time during ozone treatment of wastewater, as well as the selection of ozone catalysts and reaction kinetics analysis are often overlooked. The comprehensive analysis system for ozone treatment of organic wastewater provided by the present invention can not only analyze the catalytic performance of ozone catalysts in real time, including screening different types of ozone catalysts, measuring the kinetic process of catalyst catalytic degradation of COD, measuring the service life of catalysts, etc., but also measure the COD removal efficiency in wastewater at different ozone concentrations and flow rates, providing basic data support for actual engineering design. In summary, the present invention can comprehensively measure catalyst performance, more accurately evaluate the applicability of ozone catalytic oxidation processes, and more accurately control wastewater treatment costs, laying a foundation for better industrial application of ozone and ozone catalytic oxidation processes. Summary of the invention

[0004] The purpose of the present invention is to address the above shortcomings and provide an ozone treatment organic wastewater comprehensive analysis system and measurement method to solve the problem of organic wastewater pollution in the environment.

[0005] An ozone treatment organic wastewater comprehensive analysis system comprises, the ozone treatment organic wastewater comprehensive analysis system, an oxygen concentrator, an ozone generator, an ozone detector, a pump, an inlet storage tank, an ozone destroyer, an ozone detector and an outlet storage tank, the air inlet of the ozone treatment organic wastewater comprehensive analysis system is connected to the ozone detector, the ozone detector is connected to the ozone generator, the ozone generator is connected to the oxygen concentrator, the water inlet of the ozone treatment organic wastewater comprehensive analysis system is connected to the pump, the pump is connected to the inlet storage tank, the water outlet of the ozone treatment organic wastewater comprehensive analysis system is connected to the outlet storage tank, the air outlet of the ozone treatment organic wastewater comprehensive analysis system is connected to the ozone detector, and the ozone detector is connected to the ozone destroyer.

[0006] Preferably, the comprehensive analysis system for ozone treatment of organic wastewater includes: a device body, an air inlet, an air outlet, a water inlet, a water outlet, an aeration plate and a catalyst; the air inlet, the air outlet and the water outlet are arranged through the top of the device body, the water outlet is arranged through the side of the device body, an aeration plate is arranged on the inner bottom surface of the device body, and the catalyst is arranged inside the device body and the catalyst is arranged above the aeration plate.

[0007] Preferably, a measurement method for an ozone treatment organic wastewater comprehensive analysis system is applied, comprising the following steps:

[0008] Step 1: Reaction: After a certain amount of catalyst is loaded, the ozone catalyst performance detection system is connected, and the water inlet pump switch is turned on. When the wastewater level in the water inlet storage tank of the device is above the catalyst surface, the oxygen cylinder, ozone generator and ozone detector are turned on in sequence, and the reaction starts and the timing is started;

[0009] Step 2: Process monitoring: The ozone utilization rate is recorded by the comprehensive analysis system for ozone treatment of organic wastewater; the catalytic efficiency of the ozone catalyst can be measured by the COD value of the inlet and outlet water; the service life of the catalyst is obtained by the catalytic efficiency and reaction time of the wastewater;

[0010] Step 3: Reaction completed: turn off the ozone generator, oxygen and ozone detector in turn, and pour out the liquid in the device.

[0011] Compared with the prior art, the comprehensive analysis system and measurement method for ozone treatment of organic wastewater of the present invention have the following beneficial effects:

[0012] 1. The device of the present invention can analyze the catalytic performance of ozone catalysts in real time, including screening different types of ozone catalysts, measuring the kinetic process of COD degradation by catalysts, measuring the service life of catalysts, etc., so as to select suitable ozone catalysts for engineering.

[0013] 2. The device of the present invention can determine the reaction kinetic process parameters of ozone oxidation decomposition of organic pollutants, and provide support for engineering design, on-site commissioning and operation. The device can complete batch or continuous treatment. When no external water is added, the water outlet and the water inlet can be connected by a water pump to form an internal circulation to carry out wastewater batch treatment tests; water can also be continuously pumped into the detection system by a pump to simulate the on-site operation of industrial wastewater, detect the changes in the COD concentration of the inlet and outlet water, determine the removal efficiency of the ozone oxidation process unit, detect the relationship between ozone equivalent and pollutant removal and catalyst loss, and determine the operating cost of the ozone oxidation process unit. The present invention can comprehensively measure the performance of the catalyst, more accurately evaluate the applicability of the ozone catalytic oxidation process, and more accurately control the wastewater treatment cost, laying a foundation for better industrial application of ozone and ozone catalytic oxidation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the comprehensive analysis system for ozone treatment of organic wastewater of the present invention.

[0015] Figure 2 It is a connection diagram of the ozone catalyst performance detection system of the present invention.

[0016] Figure 3 This is the inlet and outlet ozone concentration diagram of Example 1 of the present invention.

[0017] Figure 4 This is the COD concentration diagram of the inlet and outlet of Example 1 of the present invention.

[0018] Figure 5 This is a graph showing the COD removal rate and catalyst service life in Example 1 of the present invention.

[0019] Figure 6 This is the inlet and outlet ozone concentration diagram of Example 2 of the present invention.

[0020] Figure 7 This is the COD concentration diagram of the inlet and outlet of Example 2 of the present invention.

[0021] Figure 8 This is a diagram of COD removal rate in Example 2 of the present invention.

[0022] Fig. 9 This is the inlet and outlet ozone concentration diagram of Example 3 of the present invention.

[0023] Fig.10 This is the COD concentration diagram of the inlet and outlet of Example 3 of the present invention.

[0024] Fig.11 This is a graph showing the COD removal rate and catalyst service life in Example 3 of the present invention.

[0025] Figure numerals: 1-device body, 2-air inlet, 3-air outlet, 4-water inlet, 5-water outlet, 6-aeration plate, 7-catalyst. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described below to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0027] Embodiment 1:

[0028] Example 1 provides a comprehensive analysis system and measurement method for ozone treatment of organic wastewater. The device is a rectangular parallelepiped with a size of 20cm*10cm*10cm. Figure 1 As shown. The catalyst used in this embodiment is a KXA ozone catalyst. The catalyst is composed of activated carbon and Al2O3 as a composite carrier, loaded with a variety of active ingredients and sintered; it is a cylindrical porous particle with an average diameter of about 4mm and a height of 6mm. The wastewater used is coking wastewater (COD: 2500-2800mg / L, initial pH: 9.0-10.0), which is the wastewater generated by a coking plant in Pingdingshan, Henan. The diameter of the micro-nano aeration disk used is 50mm. The ozone treatment organic wastewater comprehensive analysis system of the present invention is made of transparent plexiglass, the top is covered with a plexiglass blind plate and sealed with silicone. Among them, the top blind plate is provided with an air inlet, an air outlet, an aeration disk and a water inlet, and the side is connected with a water outlet. The device is used to load the catalyst, and the loading amount is not more than the liquid level of the wastewater to be treated.

[0029] The detection process is in a dynamic continuous test mode. The inlet and outlet ozone concentrations are used to detect the utilization rate of ozone reacted by the reaction system at any time. The inlet and outlet water rates are adjusted to ensure stable operation. Samples can be taken regularly at the outlet to detect the COD value of the water sample and measure the catalytic efficiency and life of the ozone catalyst.

[0030] The operation process of the comprehensive analysis system for ozone treatment of organic wastewater of the present invention is as follows:

[0031] Reaction: Figure 2 After loading the catalyst with a liquid-to-solid mass ratio of 3:1, connect the connection diagram of the comprehensive analysis system for ozone treatment of organic wastewater, turn on the water inlet pump switch, and when the wastewater level in the device is above the catalyst surface, turn on the oxygen cylinder, ozone generator and ozone detector in turn, and the reaction starts and the timing is started.

[0032] Process monitoring: ① The ozone utilization rate is recorded by an ozone detector; ② The catalytic efficiency of the ozone catalyst can be measured by the COD value of the inlet and outlet water; ③ The service life of the catalyst is obtained by the catalytic efficiency and reaction time of the wastewater.

[0033] Reaction completed: turn off the ozone generator, oxygen and ozone detector in turn, and pour out the liquid in the device.

[0034] Weigh the catalyst with a liquid-solid mass ratio of 3:1 and add it to the ozone treatment organic wastewater comprehensive analysis system and then seal it. Coking wastewater is added from the bottom of the device at a flow rate of 0.1L / min. Ozone is dispersed and added from the bottom through the micro-nano aeration plate to fully mix the gas and liquid. At a certain reaction time interval, a certain amount of water samples are taken from the inlet and outlet to test their COD values. The ozone utilization rate is detected and recorded by the ozone detector at the air inlet and outlet, such as Figure 3; Under room temperature, the ozone flow rate is 1.5L / min and the concentration is 75-80mg / L. The COD concentration of the inlet and outlet wastewater was sampled and measured within 0, 1, 2, 3, 4, and 5 days, and the results are shown in Figure 4. COD removal rate and service life are shown in Figure 4. Figure 5 shown.

[0035] Embodiment 2:

[0036] like Figure 1 As shown, the catalyst used in this embodiment is a KXB ozone catalyst. The catalyst is composed of activated carbon and Al2O3 as a composite carrier, loaded with a variety of active ingredients and sintered; it is a cylindrical porous particle with an average diameter of about 4mm and a height of 6mm. The wastewater used is landfill leachate (COD: 600-700mg / L, initial pH: 7.0-8.0), provided by a Guangdong environmental protection company. As in Example 1, the micro-nano aeration disk used is produced by Shenzhen Lao Yujiang Industrial Co., Ltd. and has a diameter of 50mm. The ozone treatment organic wastewater comprehensive analysis system of the present invention is made of transparent organic glass, the top is covered with an organic glass blind plate and sealed with silicone. Among them, the top blind plate is provided with an air inlet, an air outlet, an aeration disk and a water inlet, and the side is connected with a water outlet. The device is used to load the catalyst, and the loading amount is not more than the liquid level of the wastewater to be treated.

[0037] As in Example 1, the detection process is in a dynamic continuous test mode, and the inlet and outlet ozone concentrations are used to detect the utilization rate of the ozone reacted by the reaction system at any time; a certain inlet and outlet water rate is adjusted to ensure stable operation; samples can be taken regularly at the water outlet to detect the COD value of the water sample and measure the catalytic efficiency and life of the ozone catalyst.

[0038] The operation of the comprehensive analysis system for ozone treatment of organic wastewater of the present invention is the same as that of Example 1, and the process is as follows:

[0039] Reaction: Figure 2 After loading the catalyst with a liquid-to-solid mass ratio of 3:1, connect the connection diagram, turn on the water inlet pump switch, and when the wastewater level in the device is above the catalyst surface, turn on the oxygen cylinder, ozone generator and ozone detector in turn, and the reaction starts and the timing is started.

[0040] Process monitoring: ① The ozone utilization rate is recorded by an ozone detector; ② The catalytic efficiency of the ozone catalyst can be measured by the COD value of the inlet and outlet water; ③ The service life of the catalyst is obtained by the catalytic efficiency and reaction time of the wastewater.

[0041] Reaction completed: turn off the ozone generator, oxygen and ozone detector in turn, and pour out the liquid in the device.

[0042] Weigh the catalyst with a liquid-solid mass ratio of 3:1 and add it to the ozone treatment organic wastewater comprehensive analysis system and then seal it. Coking wastewater is added from the bottom of the device at a flow rate of 0.1L / min. Ozone is dispersed and added from the bottom through the micro-nano aeration plate to fully mix the gas and liquid. At a certain reaction time interval, a certain amount of water samples are taken from the inlet and outlet to test their COD values. The ozone utilization rate is detected and recorded by the ozone detector at the air inlet and outlet, such as Figure 6 ; Under room temperature, the ozone flow rate is 1.5L / min and the concentration is 75-80mg / L. The COD concentration of the inlet and outlet wastewater was sampled at 0, 1, 3, 5, 7, and 9 days respectively. The results are as follows Figure 7 As shown. COD removal rate and service life are as follows Figure 8 shown.

[0043] Embodiment 3:

[0044] like Figure 1 As shown, the catalyst used in this embodiment is a KXA ozone catalyst. The catalyst is made of activated carbon as a carrier, loaded with a variety of active ingredients and sintered; it is cylindrical porous particles with an average diameter of about 4mm and a height of 6mm. The wastewater used is pyrolysis wastewater (COD: 4000-4300mg / L, initial pH: 9.0-10.0), provided by a Henan Environmental Technology Co., Ltd. As in Example 1, the micro-nano aeration disk used is produced by Shenzhen Lao Yujiang Industrial Co., Ltd. and has a diameter of 50mm. The material of the ozone treatment organic wastewater comprehensive analysis system of the present invention is transparent plexiglass, the top is covered with a plexiglass blind plate and sealed with silicone. Among them, the top blind plate is provided with an air inlet, an air outlet, an aeration disk and a water inlet, and the side is connected with a water outlet. The device is used to load the catalyst, and the loading amount is not more than the liquid level of the wastewater to be treated.

[0045] As in Example 1, the detection process is in a dynamic continuous test mode, and the inlet and outlet ozone concentrations are used to detect the utilization rate of the ozone reacted by the reaction system at any time; a certain inlet and outlet water rate is adjusted to ensure stable operation; samples can be taken regularly at the water outlet to detect the COD value of the water sample and measure the catalytic efficiency and life of the ozone catalyst.

[0046] The operation of the comprehensive analysis system for ozone treatment of organic wastewater of the present invention is the same as that of Example 1, and the process is as follows:

[0047] Reaction: Figure 2 After loading the catalyst with a liquid-to-solid mass ratio of 3:1, connect the comprehensive analysis system for ozone treatment of organic wastewater, turn on the water inlet pump switch, and when the wastewater level in the device is above the catalyst surface, turn on the oxygen cylinder, ozone generator and ozone detector in turn, and the reaction starts and the timing begins.

[0048] Process monitoring: ① The ozone utilization rate is recorded by an ozone detector; ② The catalytic efficiency of the ozone catalyst can be measured by the COD value of the inlet and outlet water; ③ The service life of the catalyst is obtained by the catalytic efficiency and reaction time of the wastewater.

[0049] Reaction completed: turn off the ozone generator, oxygen and ozone detector in turn, and pour out the liquid in the device.

[0050] Weigh the catalyst with a liquid-solid mass ratio of 3:1 and add it to the ozone treatment organic wastewater comprehensive analysis system and then seal it. Coking wastewater is added from the bottom of the device at 0.03L / min. Ozone is dispersed and added from the bottom through the micro-nano aeration plate to fully mix the gas and liquid. At a certain reaction time interval, a certain amount of water samples are taken from the inlet and outlet to test their COD values. The ozone utilization rate is detected and recorded by the ozone detector at the air inlet and outlet, such as Fig. 9 ; Under room temperature, the ozone flow rate is 1.5L / min and the concentration is 75-80mg / L. The COD concentration of the inlet and outlet wastewater was sampled at 0, 1, 2, 3, 4, and 5 days respectively. The results are as follows Fig.10 COD removal rate and service life are shown in Fig.11 shown.

Claims

1. A measurement method for a comprehensive analysis system for treating organic wastewater using ozone, characterized in that: The following steps are involved: Step 1: Reaction: After a certain amount of catalyst is loaded, the ozone catalyst performance detection system is connected, and the water inlet pump switch is turned on. When the wastewater level in the water inlet storage tank of the device is above the catalyst surface, the oxygen cylinder, ozone generator and ozone detector are turned on in sequence, and the reaction starts and the timing is started; Step 2: Process monitoring: The ozone utilization rate is recorded by the comprehensive analysis system for ozone treatment of organic wastewater; the catalytic efficiency of the ozone catalyst can be measured by the COD value of the inlet and outlet water; the service life of the catalyst is obtained by the catalytic efficiency and reaction time of the wastewater; Step 3: Reaction completed: turn off the ozone generator, oxygen generator and ozone detector in sequence, and pour out the liquid in the device; A comprehensive analysis system for ozone treatment of organic wastewater comprises the comprehensive analysis system for ozone treatment of organic wastewater, an oxygen concentrator, an ozone generator, an ozone detector, a pump, an inlet tank, an ozone destroyer, an ozone detector and an outlet tank, wherein the air inlet (2) of the comprehensive analysis system for ozone treatment of organic wastewater is connected to the ozone detector, the ozone detector is connected to the ozone generator, the ozone generator is connected to the oxygen concentrator, the water inlet (4) of the comprehensive analysis system for ozone treatment of organic wastewater is connected to the pump, the pump is connected to the inlet tank, the water outlet (5) of the comprehensive analysis system for ozone treatment of organic wastewater is connected to the outlet tank, the air outlet (3) of the comprehensive analysis system for ozone treatment of organic wastewater is connected to the ozone detector, and the ozone detector is connected to the ozone destroyer; The ozone treatment organic wastewater comprehensive analysis system comprises: a device body (1), an air inlet (2), an air outlet (3), a water inlet (4), a water outlet (5), an aeration plate (6) and a catalyst (7); the air inlet (2), the air outlet (3) and the water outlet (5) are provided through a blind plate on the top of the device body (1); the water outlet (5) is provided through a side of the device body (1); the aeration plate (6) is provided on the inner bottom surface of the device body (1); the catalyst (7) is provided inside the device body (1) and the catalyst (7) is provided above the aeration plate (6).

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