CN113023968A

CN113023968A - Laboratory wastewater treatment device and laboratory wastewater treatment method

Info

Publication number: CN113023968A
Application number: CN202110375817.7A
Authority: CN
Inventors: 胡子安; 陈亚巍; 宋新明; 丁剑; 李建新; 毛晓科; 王庆锋
Original assignee: Hebei Anmiao Environmental Protection Technology Co ltd
Current assignee: Hebei Anmiao Environmental Protection Technology Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-06-25

Abstract

The invention is suitable for the technical field of laboratory wastewater treatment, and provides a laboratory wastewater treatment device which comprises a raw water storage module, a pH adjusting module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjusting back module, an intermediate buffer module, an ozone reaction module and a quartz sand filtering module which are sequentially connected. The invention can fully remove pollutants such as COD, SS and the like in the wastewater generated by a physicochemical laboratory by combining the micro-electrolysis process and the advanced oxidation process, the advanced oxidation process is operated by a Fenton oxidation process and an ozone oxidation process in series, the purification speed of the wastewater in the physicochemical laboratory is high, and the purification process is not influenced by temperature. And this embodiment passes through the pH value of twice regulation waste water of pH adjusting module and pH callback module, can provide the environmental condition of being convenient for little electrolysis process and advanced oxidation technology treatment waste water on the one hand, and on the other hand makes the waste water pH after handling up to standard, can directly discharge. The invention also provides a laboratory wastewater treatment method.

Description

Laboratory wastewater treatment device and laboratory wastewater treatment method

Technical Field

The invention belongs to the technical field of laboratory wastewater treatment, and particularly relates to a laboratory wastewater treatment device and a laboratory wastewater treatment method.

Background

During experimental work, a large amount of laboratory wastewater is generated by medicines, reagents, test solutions, instrument cleaning and the like. Pollutants in wastewater include two major categories, inorganic and organic. The inorganic pollutants comprise heavy metal ions (mercury, cadmium, chromium, lead, manganese, silver, nickel, zinc, copper, aluminum, arsenic, etc.), acid-base pH values (nitric acid, hydrochloric acid, sulfuric acid, hydrogen peroxide, potassium chloride, calcium chloride, etc.), halogen ions and other non-metal ions. The organic pollutants include organic solvent, petroleum, oil and fat, saccharide, protein, polycyclic aromatic hydrocarbon, halogenated hydrocarbon, toluene, phenol, alkane, olefin, ketone, ether, phenol, aldehyde, organophosphorus pesticide, etc.

The types of pollutants in laboratory wastewater produced vary from laboratory to laboratory. For the physicochemical laboratory, the main production is of pollutants of the COD, SS (suspended matter) and pH type. The current method for treating the wastewater in the physicochemical laboratory adopts a micro-electrolysis and microbial purification mode.

The applicant of the present invention finds that, in implementing the above technical solution, the above technical solution has at least the following disadvantages:

the speed of purifying and treating the wastewater in the physical and chemical laboratory by the microorganisms is low, and the activity of the microorganisms is greatly influenced by the temperature, so that the treatment speed of the wastewater in the physical and chemical laboratory is greatly influenced by the temperature.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a laboratory wastewater treatment apparatus, which aims to solve the problems mentioned in the background art.

The embodiment of the invention is realized in such a way that the laboratory wastewater treatment device comprises a raw water storage module, a pH adjusting module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjusting back module, an intermediate buffer module, an ozone reaction module and a quartz sand filtering module which are sequentially connected;

the raw water storage module is used for storing wastewater;

the pH adjusting module is used for adjusting the pH value of the wastewater;

the Fe/C micro-electrolysis module is used for carrying out electrolytic oxidation and reduction treatment on the wastewater treated by the pH adjusting module;

the Fenton reaction module is used for carrying out Fenton oxidation treatment on the wastewater treated by the Fe/C micro-electrolysis module;

the pH callback module is used for adjusting the pH value of the wastewater treated by the Fenton reaction module;

the intermediate buffer module is used for buffering the wastewater treated by the pH callback module;

the ozone reaction module is used for carrying out ozone oxidation treatment on the wastewater treated by the intermediate buffer module;

the quartz sand filtering module is used for separating particles from the wastewater treated by the ozone reaction module.

Preferably, the raw water storage module, the pH adjusting module, the Fenton reaction module, the pH callback module and the middle buffer module are all provided with stirring devices.

Preferably, the raw water storage module includes:

a raw water storage container for storing wastewater;

and the power pump is used for pumping the wastewater in the raw water storage container into the pH adjusting module.

Preferably, the raw water storage container is provided with a turbidity meter, a COD detector, a first pH meter, a first ultrahigh liquid level meter, a first high liquid level meter, a first middle liquid level meter and a first low liquid level meter; the turbidity meter is used for detecting the turbidity of the wastewater in the raw water storage container; the COD detector is used for detecting the COD value of the wastewater in the raw water storage container; the first pH meter is used for detecting the pH value of the wastewater in the raw water storage container; and the inlet end of the power pump is provided with a flowmeter for detecting the flow of the wastewater pumped into the pH adjusting module.

Preferably, the pH adjusting module includes:

a pH adjusting container;

the first acid dosing container is connected with the pH adjusting container and is used for storing acid;

the first acid dosing pump is used for adding the acid in the first acid dosing container into the pH adjusting container;

the first alkali dosing container is connected with the pH adjusting container and is used for storing alkali;

and the first alkali dosing pump is used for adding the alkali in the first alkali dosing container into the pH adjusting container.

Preferably, a second pH meter and a second ultrahigh liquid level meter are arranged on the pH adjusting container; the second pH meter is used for detecting the pH value of the wastewater in the pH adjusting container.

Preferably, the pH adjusting container and the acid dosing container are both provided with stirring devices.

Preferably, the Fe/C micro-electrolysis module comprises:

the Fe/C micro-electrolysis container is used for carrying out electrolytic oxidation and reduction treatment on the wastewater treated by the pH adjusting module;

the Fe/C circulating pump is used for circulating the wastewater in the Fe/C micro-electrolysis container;

the first rotary mixing aerator is arranged in the Fe/C micro-electrolysis container and is used for carrying out oxygenation and aeration on the wastewater in the Fe/C micro-electrolysis container in a multi-layer spiral cutting mode.

Preferably, a third pH meter and a third ultrahigh liquid level meter are arranged on the Fe/C micro-electrolysis container; and the third pH meter is used for detecting the pH value of the wastewater in the Fe/C micro-electrolysis container.

Preferably, the Fenton reaction module comprises:

a Fenton reaction vessel;

a ferrous iron dosing container connected with the Fenton reaction container and used for storing Fe2 +;

a ferrous iron dosing pump, which is used for adding Fe2+ in the ferrous iron dosing container into the Fenton reaction container;

the hydrogen peroxide dosing container is connected with the Fenton reaction container and is used for storing hydrogen peroxide;

and the hydrogen peroxide dosing pump is used for adding the hydrogen peroxide in the hydrogen peroxide dosing container into the Fenton reaction container.

Preferably, a fourth pH meter and a fourth ultrahigh liquid level meter are arranged on the Fenton reaction container; and the fourth pH meter is used for detecting the pH value of the wastewater in the Fenton reaction container.

Preferably, the Fenton reaction vessel, the ferrous iron dosing vessel and the hydrogen peroxide dosing vessel are all provided with stirring devices.

Preferably, the pH callback module comprises:

adjusting the pH back to the container;

the second acid dosing container is connected with the pH adjusting container and is used for storing acid;

and the second acid dosing pump is used for adding the acid in the second acid dosing container into the pH adjusting container.

The second alkali dosing container is connected with the pH adjusting container and is used for storing alkali;

and the second alkali dosing pump is used for adding the alkali in the second alkali dosing container into the pH adjusting container.

Preferably, a fifth pH meter and a fifth ultrahigh liquid level meter are arranged on the pH readjustment container; and the fifth pH meter is used for detecting the pH value of the wastewater in the pH readjustment container.

Preferably, the pH adjusting container and the alkali dosing container are both provided with stirring devices.

Preferably, the intermediate buffer module includes:

and the intermediate buffer container is used for buffering the wastewater treated by the pH callback module.

Preferably, a sixth pH meter, a sixth ultrahigh liquid level meter, a second high liquid level meter, a second middle liquid level meter and a second low liquid level meter are arranged on the intermediate buffer container; and the sixth pH meter is used for detecting the pH value of the wastewater in the intermediate buffer container.

Preferably, the ozone reaction module includes:

an ozone reaction vessel;

a booster pump for pumping the wastewater in the intermediate buffer module into an ozone reaction vessel;

the ozone generator is connected with the ozone reaction container and is used for generating ozone;

the ozone circulating pump is used for circulating the ozone in the ozone reaction container;

the air compressor is connected with the ozone circulating pump;

and the second rotary mixing aerator is arranged in the ozone reaction container and is used for carrying out oxygenation and aeration on the wastewater in the ozone reaction container in a multi-layer spiral cutting mode.

Preferably, the silica sand filter module includes:

the quartz sand filtering container is used for carrying out particle separation on the wastewater treated by the ozone reaction module;

and the third rotary mixing aerator is arranged in the quartz sand filtering container and is used for carrying out oxygenation and aeration on the wastewater in the quartz sand filtering container in a multi-layer spiral cutting mode.

Preferably, the laboratory wastewater treatment apparatus further comprises:

and the control module is used for controlling the operation and the stop of the laboratory wastewater treatment device.

Another object of an embodiment of the present invention is to provide a laboratory wastewater treatment apparatus, including:

a box body;

a pH adjusting module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjusting back module, an intermediate buffer module, an ozone reaction module and a quartz sand filtering module which are connected in sequence are arranged in the box body;

the pH adjusting module is used for adjusting the pH value of the wastewater;

the quartz sand filtering module is used for performing particle separation on the wastewater treated by the ozone reaction module;

and a control module is further arranged in the box body and is used for controlling the operation and the stop of the laboratory wastewater treatment device.

Another object of an embodiment of the present invention is to provide a laboratory wastewater treatment method based on any one of the above laboratory wastewater treatment apparatuses, including the steps of:

adjusting the pH value of the wastewater through a pH adjusting module;

carrying out electrolytic oxidation and reduction treatment on the wastewater treated by the pH adjusting module through a Fe/C micro-electrolysis module;

carrying out Fenton oxidation treatment on the wastewater treated by the Fe/C micro-electrolysis module through a Fenton reaction module;

adjusting the pH value of the wastewater treated by the Fenton reaction module through a pH callback module;

buffering the wastewater treated by the pH callback module through an intermediate buffer module;

carrying out ozone oxidation treatment on the wastewater treated by the middle buffer module through an ozone reaction module;

and (4) carrying out particle separation on the wastewater treated by the ozone reaction module through a quartz sand filtering module.

Another object of an embodiment of the present invention is to provide a laboratory wastewater treatment method, including the steps of:

adjusting the pH value of the wastewater;

carrying out electrolytic oxidation and reduction treatment on the wastewater after the pH value is adjusted;

carrying out Fenton oxidation treatment on the wastewater after the electrolytic oxidation and reduction treatment;

regulating the pH value of the wastewater after the Fenton oxidation treatment again;

buffering the wastewater after the pH value is adjusted again;

carrying out ozone oxidation treatment on the buffered wastewater;

and (4) carrying out particle separation on the wastewater after the ozone oxidation treatment.

The laboratory wastewater treatment device provided by the embodiment of the invention comprises a raw water storage module, a pH adjusting module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjusting back module, an intermediate buffer module, an ozone reaction module and a quartz sand filtering module which are sequentially connected; the raw water storage module is used for storing wastewater; the pH adjusting module is used for adjusting the pH value of the wastewater; the Fe/C micro-electrolysis module is used for carrying out electrolytic oxidation and reduction treatment on the wastewater treated by the pH adjusting module; the Fenton reaction module is used for carrying out Fenton oxidation treatment on the wastewater treated by the Fe/C micro-electrolysis module; the pH callback module is used for adjusting the pH value of the wastewater treated by the Fenton reaction module; the intermediate buffer module is used for buffering the wastewater treated by the pH callback module; the ozone reaction module is used for carrying out ozone oxidation treatment on the wastewater treated by the intermediate buffer module; the quartz sand filtering module is used for separating particles from the wastewater treated by the ozone reaction module.

Compared with the prior art, the invention can fully remove pollutants such as COD, SS and the like in the wastewater generated by a physicochemical laboratory by combining the micro-electrolysis process and the advanced oxidation process, the advanced oxidation process is operated by the Fenton oxidation process and the ozone oxidation process in series, the purification speed of the wastewater in the physicochemical laboratory is high, and the purification process is not influenced by temperature. And this embodiment passes through the pH value of twice regulation waste water of pH adjusting module and pH callback module, can provide the environmental condition of being convenient for little electrolysis process and advanced oxidation technology treatment waste water on the one hand, and on the other hand makes the waste water pH after handling up to standard, can directly discharge.

Drawings

FIG. 1 is a schematic structural view of a laboratory wastewater treatment apparatus provided in example 1 of the present invention;

FIG. 2 is a schematic structural diagram of a medicated container provided in an embodiment of the present invention;

FIG. 3 is a plan view of a laboratory wastewater treatment apparatus according to example 2 of the present invention;

FIG. 4 is a schematic view of the back side of a laboratory wastewater treatment apparatus provided in example 2 of the present invention;

fig. 5 is a schematic front view of a laboratory wastewater treatment apparatus according to example 2 of the present invention.

In the drawings: 1. a box body; 11. a raw water storage container; 12. a power pump; 21. a pH adjusting container; 22. a first acid dosing container; 23. a first base dosing container; 24. a first acid dosing pump; 25. a first base dosing pump; 31. an Fe/C micro-electrolysis vessel; 32. a Fe/C circulating pump; 33. a first rotary mixing aerator; 41. a Fenton reaction vessel; 42. a ferrous iron dosing container; 43. a hydrogen peroxide dosing container; 44. a ferrous dosing pump; 45. a hydrogen peroxide dosing pump; 51. adjusting the pH back to the container; 52. a second acid dosing container; 53. a second acid dosing container; 54. a second acid dosing pump; 55. a second base dosing pump; 61. an intermediate buffer container; 71. an ozone reaction vessel; 72. an ozone generator; 73. a booster pump; 74. a second rotary mixing aerator; 75. an ozone circulating pump; 76. an ozone buffer tank; 81. a quartz sand filter container; 82. a third rotary mixing aerator; 90. an emergency evacuation pump; 100. a precision filter; 110. and a control module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Example 1

As shown in fig. 1 and 2, a laboratory wastewater treatment apparatus according to an embodiment of the present invention includes a raw water storage module, a pH adjustment module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjustment back module, an intermediate buffer module, an ozone reaction module, and a quartz sand filtration module, which are connected in sequence;

the raw water storage module is used for storing wastewater;

the pH adjusting module is used for adjusting the pH value of the wastewater;

In the embodiment of the invention, the raw water storage module, the pH adjusting module, the Fe/C micro-electrolysis module, the Fenton reaction module, the pH adjusting back module, the intermediate buffer module, the ozone reaction module and the quartz sand filtering module are sequentially connected through a sewage pipeline.

The working principle of the embodiment of the invention is as follows:

the wastewater generated in a physical and chemical laboratory is dynamically conveyed into a raw water storage module for storage, the wastewater in the raw water storage module enters a pH adjusting module through a sewage pipeline, the pH value of the wastewater is adjusted through the pH adjusting module, the wastewater after the pH value adjustment enters an Fe/C micro-electrolysis module, the wastewater is subjected to electrolytic oxidation and reduction treatment through the Fe/C micro-electrolysis module, the COD and the chroma of the wastewater are greatly reduced, then the wastewater enters a Fenton reaction module through the sewage pipeline, the Fenton oxidation treatment is performed on the wastewater through the Fenton reaction module, the oxidation of organic matters and reducing substances in the wastewater is accelerated, then the wastewater enters a pH adjusting module, the pH value is adjusted again, the wastewater after the secondary pH value adjustment enters an intermediate buffer module through the sewage pipeline, the wastewater is buffered in the intermediate buffer die block, all parts of the wastewater have uniform physicochemical properties, and then the wastewater enters an ozone reaction module, the ozone oxidation treatment is carried out on the wastewater by the ozone reaction module, the wastewater is disinfected, decolored, deodorized and organic matter and COD are removed, finally, the wastewater enters the quartz sand filtering module, and particulate matters (namely SS) in the wastewater are filtered by the quartz sand filtering module to obtain the treated water body reaching the standard.

As shown in fig. 1, as a preferred embodiment of the present invention, the raw water storage module, the pH adjusting module, the Fenton reaction module, the pH adjusting module and the intermediate buffer module are all provided with stirring devices.

Specifically, the stirring device can improve the chemical reaction speed in the wastewater treatment process and can keep the uniform physicochemical property of each part of the wastewater.

As shown in fig. 1 and 2, as a preferred embodiment of the present invention, the raw water storage module includes:

a raw water storage container 11 for storing wastewater;

and the power pump 12 is used for pumping the wastewater in the raw water storage container 11 into the pH adjusting module.

Specifically, the wastewater generated in the physicochemical laboratory is conveyed to a raw water storage container 11 for storage under power, and then the wastewater in the raw water storage container 11 is pumped into a pH adjusting module by a power pump 12 to adjust the pH.

In addition, the raw water storage container 11 is provided with a first turbidity meter, a first COD detector, a first pH meter, a first ultrahigh level meter, a first high level meter, a first middle level meter and a first low level meter. The first turbidity meter is used for detecting the turbidity of the wastewater in the raw water storage container 11; the first COD detector is used for detecting the COD value of the wastewater in the raw water storage container 11; the first pH meter is used for detecting the pH value of the wastewater in the raw water storage container 11; the first ultrahigh liquid level meter, the first high liquid level meter, the first middle liquid level meter and the first low liquid level meter are respectively used for detecting liquid levels at an ultrahigh point, a high point, a middle point and a low point on the raw water storage container 11. The inlet end of the power pump 12 is provided with a flow meter for detecting the flow of the wastewater pumped into the pH adjusting module.

As shown in fig. 1 and 2, as a preferred embodiment of the present invention, the pH adjusting module includes:

a pH adjusting vessel 21;

a first acid adding container 22 connected to the pH adjusting container 21 for storing acid;

a first acid adding pump 24 for adding the acid in the first acid adding container 22 into the pH adjusting container 21;

a first alkali dosing container 23 connected to the pH adjusting container 21 for storing alkali;

and a first alkali dosing pump 25 for adding the alkali in the first alkali dosing container 23 into the pH adjusting container 21.

Specifically, the pH adjusting container 21 is connected to the power pump 12 through a sewage line, and the raw water storage container 11 is pumped into the pH adjusting container 21 by the power pump 12. Then, acid or/and alkali is added into the pH adjusting container 21 through a first acid dosing container 22, a first acid dosing pump 24, a first alkali dosing container 23 and a first alkali dosing pump 25, and the pH value of the wastewater is adjusted.

In addition, a second pH meter and a second ultrahigh liquid level meter are arranged on the pH adjusting container 21; the second pH meter is used for detecting the pH value of the wastewater in the pH adjusting container 21, and the second ultrahigh liquid level meter is used for detecting the liquid level of an ultrahigh point on the pH adjusting container 21.

In addition, the pH adjusting container 21 and the acid adding container are both provided with stirring devices, and the physical and chemical properties of all parts of the wastewater in the pH adjusting container 21 are homogenized through the stirring devices.

As shown in fig. 1 and 2, the Fe/C micro-electrolysis module, as a preferred embodiment of the present invention, comprises:

the Fe/C micro-electrolysis container 31 is used for carrying out electrolytic oxidation and reduction treatment on the wastewater treated by the pH adjusting module;

an Fe/C circulation pump 32 for circulating the wastewater in the Fe/C micro-electrolysis vessel 31;

and a first rotary mixing aerator 33 arranged in the Fe/C micro-electrolysis container 31 and used for carrying out oxygenation aeration on the wastewater in the Fe/C micro-electrolysis container 31 in a multi-layer spiral cutting mode.

Specifically, the micro-electrolysis technology is an ideal process for treating high-concentration wastewater at present, and the process is used for treating high-salinity wastewater which is difficult to degrade and has high chroma, and can greatly reduce COD and chroma. The technology is to treat the wastewater by using the micro-electrolysis filler filled in the micro-electrolysis equipment to generate the 'galvanic cell' effect under the condition of no power supply. When water is supplied, countless 'primary batteries' with the potential difference of 1.2V are formed in the device. The 'primary battery' takes waste water as electrolyte, forms current through discharge to carry out electrolytic oxidation and reduction treatment on the waste water, and nascent states [. OH ], [ H ], [ O ], Fe2+, Fe3+ and the like generated in the treatment process can carry out redox reaction with a plurality of components in the waste water, such as chromophoric groups or chromophoric groups of colored substances in colored waste water can be destroyed, even chain breakage is carried out, so as to achieve the effects of degradation and decoloration; the generated Fe2+ is further oxidized into Fe3+, and the hydrates of the Fe2+ have stronger adsorption flocculation activity, particularly ferrous hydroxide and ferric hydroxide colloid flocculants are generated after pH value is adjusted by adding a pH regulator, the flocculation capacity of the ferric hydroxide and the ferric hydroxide colloid flocculants is far higher than that of ferric hydroxide colloids obtained by hydrolysis of common medicaments, and the ferric hydroxide colloid flocculants can greatly flocculate micro particles, metal particles and organic macromolecules dispersed in water. The working principle of the method is based on the combined action of electrochemistry, oxidation reduction, physics and flocculation precipitation so as to achieve the purpose of degrading organic pollutants.

In this embodiment, the micro-electrolysis process is implemented by the Fe/C micro-electrolysis vessel 31, and the pH of the wastewater entering the Fe/C micro-electrolysis vessel 31 is adjusted in advance by the pH adjusting vessel 21. The Fe/C circulation pump 32 is used to circulate the wastewater in the Fe/C micro-electrolysis vessel 31, so that each part of the wastewater in the Fe/C micro-electrolysis vessel 31 can be micro-electrolyzed. The first rotary mixing aerator 33 can perform oxygen-charging aeration on the wastewater in the Fe/C micro-electrolysis vessel 31 in the form of multi-layer spiral cutting, thereby improving the micro-electrolysis efficiency of the wastewater in the Fe/C micro-electrolysis vessel 31. Through the process, the COD and the chroma of the wastewater can be greatly reduced.

In addition, a third pH meter and a third ultrahigh liquid level meter are arranged on the Fe/C micro-electrolysis container 31; the third pH meter is used for detecting the pH value of the wastewater in the Fe/C micro-electrolysis container 31, and the third ultra-high liquid level meter is used for detecting the liquid level of an ultra-high point on the Fe/C micro-electrolysis container 31.

As shown in fig. 1 and 2, as a preferred embodiment of the present invention, the Fenton reaction module comprises:

a Fenton reaction vessel 41;

a ferrous iron dosing container 42 connected to the Fenton reaction container 41 for storing Fe2 +;

a ferrous dosing pump 44, configured to add Fe2+ in the ferrous dosing container 42 into the Fenton reaction container 41;

the hydrogen peroxide dosing container 43 is connected with the Fenton reaction container 41 and is used for storing hydrogen peroxide;

and the hydrogen peroxide dosing pump 45 is used for adding the hydrogen peroxide in the hydrogen peroxide dosing container 43 into the Fenton reaction container 41.

Specifically, the oxidation technology system formed by hydrogen peroxide and a catalyst Fe2+ is called Fenton reagent. It is a chemical oxidation water treatment technology which does not need high temperature and high pressure and has simple process. Recent studies have shown that the oxidation mechanism of Fenton is due to the highly reactive hydroxyl radicals generated by the catalytic decomposition of hydrogen peroxide under acidic conditions. Under the action of Fe2+ catalyst, H2O2 can generate two active hydroxyl radicals, so that the radical chain reaction is initiated and propagated, and the oxidation of organic matters and reducing substances is accelerated.

In this embodiment, the oxidation process is implemented by adding Fe2+ in the ferrous dosing container 42 into the Fenton reaction container 41 through the ferrous dosing pump 44, and adding hydrogen peroxide in the hydrogen peroxide dosing container 43 into the Fenton reaction container 41 through the hydrogen peroxide dosing pump 45.

In addition, a fourth pH meter and a fourth ultra-high liquid level meter are arranged on the Fenton reaction vessel 41; the fourth pH meter is used for detecting the pH value of the wastewater in the Fenton reaction vessel 41, and the fourth ultra-high level meter is used for detecting the liquid level of the ultra-high point on the Fenton reaction vessel 41.

In addition, the Fenton reaction vessel 41, the ferrous iron dosing vessel 42 and the hydrogen peroxide dosing vessel 43 are all provided with stirring devices, so that the Fenton oxidation reaction is accelerated and the physicochemical properties of all parts of the wastewater are homogenized through the stirring devices.

As shown in fig. 1 and 2, as a preferred embodiment of the present invention, the pH callback module includes:

adjusting the pH back to the container;

a second acid dosing container 5352 connected to the pH adjustment container for storing acid;

a second acid dosing pump 54 for adding the acid in the second acid dosing container 5352 to the pH adjustment container.

and the second alkali dosing pump 55 is used for adding the alkali in the second alkali dosing container into the pH adjusting container.

Specifically, the waste water after Fenton oxidation enters into a pH adjusting container, and acid or/and alkali is added into the pH adjusting container through a second acid dosing container 5352, a second acid dosing pump 54, a second alkali dosing container and a second alkali dosing pump 55, so that the pH value of the waste water is changed, and the subsequent ozone oxidation is facilitated.

In addition, a fifth pH meter and a fifth ultrahigh liquid level meter are arranged on the pH adjusting-back container; the fifth pH meter is used for detecting the pH value of the wastewater in the pH readjustment container, and the fifth ultrahigh liquid level meter is used for detecting the liquid level of an ultrahigh point on the pH readjustment container.

In addition, pH recalling container and alkali medicine container all are equipped with agitating unit, make each partial physicochemical property homogenization of waste water in the pH recalling container through agitating unit.

As shown in fig. 1, as a preferred embodiment of the present invention, the intermediate buffer module includes:

and the intermediate buffer container 61 is used for buffering the wastewater treated by the pH callback module.

Specifically, the pH of the wastewater is buffered by the intermediate buffer container 61.

In addition, a sixth pH meter, a sixth ultrahigh liquid level meter, a second high liquid level meter, a second middle liquid level meter and a second low liquid level meter are arranged on the intermediate buffer container 61; the sixth pH meter is used for detecting the pH value of the wastewater in the intermediate buffer container 61, and the sixth ultrahigh level meter, the second medium level meter and the second low level meter are respectively used for detecting the liquid levels of an ultrahigh point, a high point, a middle point and a low point on the intermediate buffer container 61.

As shown in fig. 1, as a preferred embodiment of the present invention, the ozone reaction module comprises:

an ozone reaction vessel 71;

a booster pump 73 for pumping the wastewater in the intermediate buffer module into the ozone reaction vessel 71;

an ozone generator 72 connected to the ozone reaction container 71 for generating ozone;

an ozone circulation pump 75 for circulating ozone in the ozone reaction vessel 71;

an air compressor connected to the ozone circulation pump 75;

and a second rotary mixing aerator 74 disposed in the ozone reaction vessel 71 for oxygenating and aerating the wastewater in the ozone reaction vessel 71 in the form of multi-layer spiral cutting.

Specifically, ozone is an excellent strong oxidant, and has good effects in sewage disinfection, color removal, deodorization, organic matter removal and COD removal. The ozone oxidation method has the advantages of high organic matter degradation speed, mild conditions and no secondary pollution. The ozone treatment of sewage is mainly characterized in that ozone is directly oxidized, and free radical oxidation is carried out through formed hydroxyl free radicals. In this embodiment, the ozone oxidation process is performed by introducing ozone generated by the ozone generator 72 into the ozone reaction vessel 71.

In the embodiment, Fenton oxidation and ozone oxidation are connected in series for operation, and the operation frequency and the operation intensity of the two processes are reasonably controlled according to the monitoring value of COD at the raw water buffer container.

In this embodiment, the ozone generator 72 is connected to the second vortex mixing aerator 74 in the ozone reaction vessel 71 through an air pipe, and two flow meters and a pressure gauge are provided on the ozone generator 72. The ozone reaction container 71 is provided with a safety valve, and a sewage pipeline connected with the ozone reaction container 71 and the quartz sand filtering module is provided with a pH meter and a pressure gauge.

As shown in fig. 1, as a preferred embodiment of the present invention, the silica sand filtering module includes:

the quartz sand filtering container 81 is used for carrying out particle separation on the wastewater treated by the ozone reaction module;

and a third rotary mixing aerator 82 arranged in the quartz sand filtering container 81 and used for carrying out oxygenation aeration on the wastewater in the quartz sand filtering container 81 in a multi-layer spiral cutting mode.

Specifically, a second COD detector, a pressure gauge and a second turbidity meter are arranged on the output pipeline of the quartz sand filtering container 81. The second COD detector is used for detecting the COD value of the water body after the particles are filtered by the quartz sand filtering container 81, and the second turbidity meter is used for detecting the turbidity of the water body after the particles are filtered by the quartz sand filtering container 81. When the COD value and the turbidity of the water body reach the standard, the water body can be directly discharged, and the water body which does not reach the standard and the backwashing water in the quartz sand filtering container 81 flow back to the pH adjusting container 21 and go through the purification treatment process again.

In addition, the bottom ends of the raw water storage container 11, the pH adjusting container 21, the Fe/C micro-electrolysis container 31, the Fenton reaction container 41, the pH adjusting container, the intermediate buffer container 61 and the quartz sand filter container 81 are all communicated with a sewage pipeline, and the sewage pipeline is finally connected to an emergency evacuation pump 90, and emergency evacuation and ozone evacuation are realized through the emergency evacuation pump 90.

As a preferred embodiment of the present invention, the laboratory wastewater treatment apparatus further comprises:

and the control module 110 is used for controlling the operation and the stop of the laboratory wastewater treatment device.

Specifically, control module 110 has been add on above-mentioned laboratory wastewater treatment device's basis to this embodiment for this laboratory wastewater treatment device can realize unmanned on duty automatic operation, and through the running state of the automatic regulation and control device of technical index such as instrument real-time supervision quality of water, water yield.

In addition, the control module 110 in this embodiment may further include a remote transmission system, so as to transmit the operation condition of the laboratory wastewater treatment apparatus to an intelligent terminal such as a PC terminal or a mobile terminal in real time, including data transmission of an automatic monitoring instrument, transmission of fault information, data transmission of water quality of inlet and outlet water, data transmission of treated water amount, transmission of operation condition of each process unit device, and the like.

Example 2

As shown in fig. 3 to 5, an embodiment of the present invention further provides a laboratory wastewater treatment apparatus, including:

a box body 1;

a pH adjusting module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjusting back module, an intermediate buffer module, an ozone reaction module and a quartz sand filtering module which are connected in sequence are arranged in the box body 1;

the pH adjusting module is used for adjusting the pH value of the wastewater;

the box body 1 is also internally provided with a control module 110, and the control module 110 is used for controlling the operation and the stop of the laboratory wastewater treatment device.

Specifically, the present embodiment provides an integrated laboratory wastewater treatment apparatus, which integrates the laboratory wastewater treatment apparatus of embodiment 1 into one tank 1 to form a box structure. Different from the embodiment 1, the embodiment does not have a raw water storage module, and adds a precision filter 100 after the quartz sand filtering module, so as to further filter the water body. In addition, an ozone buffer tank 76 is additionally arranged in the ozone reaction module to buffer the generated ozone so as to homogenize the physicochemical property of the ozone. Various instruments in the device are also integrated on the control module 110, a touch screen is further arranged on the control module 110, and a control instruction is issued to the control module 110 through the touch screen, so that the device is convenient to use.

Compared with embodiment 1, this embodiment has not only the advantages of embodiment 1, but also various advantages such as easy movement and easy installation.

Example 3

The present example provides a laboratory wastewater treatment method based on the laboratory wastewater treatment apparatus of example 1 or example 2, including the steps of:

adjusting the pH value of the wastewater through a pH adjusting module;

Through the steps, the water body reaching the standard can be finally obtained. The following table is a parameter change table of the wastewater treatment process provided in this embodiment, and it can be clearly seen that pollutants such as COD, SS, and the like in wastewater can be substantially removed by using the method of this embodiment, and the treated wastewater reaches the discharge standard.

Project (mg/L)	COD_cr	Electrical conductivity of	pH	SS	Total zinc	Total metal species
							Waste water	830	1500	4-9	100	5	15
PH adjusting module	830	1500	4-9	100	5	15
							Fe/C micro-electrolysis module	830	1500	3	100	5	15
Fenton reaction module	510	1800	3	150	5	20
							PH (potential of hydrogen) callback module	200	1800	3	150	5	20
Intermediate buffer module	200	1800	8.5	150	5	20
							Ozone reaction module	200	1800	8.5	150	5	20
Quartz sand filtering module	100	1800	7.5	150	5	20
							Discharging water	30	300	7.5	10	0.5	5
Removal rate	96.4％	80％	-	90％	90％	66.7％

Example 4

An embodiment of the present invention also provides a laboratory wastewater treatment method, including the steps of:

adjusting the pH value of the wastewater;

buffering the wastewater after the pH value is adjusted again;

carrying out ozone oxidation treatment on the buffered wastewater;

The method of this example has the same treatment effect as the method of example 3, but the method of this example does not depend on the laboratory wastewater treatment apparatus of examples 1 and 2, and has wider applicability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A laboratory wastewater treatment device is characterized by comprising a raw water storage module, a pH adjusting module, a Fe/C micro-electrolysis module, a Fenton reaction module, a pH adjusting back module, an intermediate buffer module, an ozone reaction module and a quartz sand filtering module which are sequentially connected;

the raw water storage module is used for storing wastewater;

the pH adjusting module is used for adjusting the pH value of the wastewater;

2. The laboratory wastewater treatment device according to claim 1, wherein the raw water storage module, the pH adjustment module, the Fenton reaction module, the pH adjustment module and the intermediate buffer module are provided with stirring devices.

3. The laboratory wastewater treatment apparatus according to claim 1, wherein said Fe/C micro-electrolysis module comprises:

4. The laboratory wastewater treatment device according to claim 1, wherein the Fenton reaction module comprises:

a Fenton reaction vessel;

5. The laboratory wastewater treatment apparatus according to claim 1, wherein the ozone reaction module comprises:

an ozone reaction vessel;

the air compressor is connected with the ozone circulating pump;

6. The laboratory wastewater treatment apparatus according to claim 1, wherein the silica sand filter module comprises:

7. The laboratory wastewater treatment apparatus according to claim 1, further comprising:

8. A laboratory wastewater treatment apparatus, comprising:

a box body;

the pH adjusting module is used for adjusting the pH value of the wastewater;

9. A laboratory wastewater treatment method based on the laboratory wastewater treatment device according to any one of claims 1 to 8, comprising the steps of:

adjusting the pH value of the wastewater through a pH adjusting module;

10. A laboratory wastewater treatment method is characterized by comprising the following steps:

adjusting the pH value of the wastewater;

buffering the wastewater after the pH value is adjusted again;

carrying out ozone oxidation treatment on the buffered wastewater;