CN113371883A - Treatment system and process for arsenic-containing wastewater - Google Patents

Treatment system and process for arsenic-containing wastewater Download PDF

Info

Publication number
CN113371883A
CN113371883A CN202110769427.8A CN202110769427A CN113371883A CN 113371883 A CN113371883 A CN 113371883A CN 202110769427 A CN202110769427 A CN 202110769427A CN 113371883 A CN113371883 A CN 113371883A
Authority
CN
China
Prior art keywords
water
arsenic
reaction tank
adsorbent
ceramic tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110769427.8A
Other languages
Chinese (zh)
Inventor
孙翠珍
樊浩宇
刘汝鹏
陈冬辰
金岩
张震
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Jianzhu University
Original Assignee
Shandong Jianzhu University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Jianzhu University filed Critical Shandong Jianzhu University
Priority to CN202110769427.8A priority Critical patent/CN113371883A/en
Publication of CN113371883A publication Critical patent/CN113371883A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/103—Arsenic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The invention discloses a treatment system and a treatment process for arsenic-containing wastewater, and relates to the technical field of sewage treatment. Compared with the prior art, the invention has the beneficial effects that: the nano bubbles generated by the nano bubble generator react with As (III) to be converted into As (V), so that the oxidation rate and the oxidation efficiency of As (III) are greatly improved, secondary pollution is avoided, and the arsenic-containing wastewater treatment efficiency is high, economic and environment-friendly.

Description

Treatment system and process for arsenic-containing wastewater
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a treatment system and a treatment process for arsenic-containing wastewater.
Background
Currently, arsenic (As) contamination has become one of the most serious heavy (metal-like) contamination and is a global problem. To date, around 1.5 million people are affected worldwide, most of them are asian countries, and china is one of the most seriously harmed countries by arsenic pollution. Long-term drinking of high arsenic water can cause skin damage and pigmentation, and further develop into skin cancer. Studies have shown that cumulative arsenic intake can lead to a range of diseases such as cardiovascular disease, respiratory disease, and various cancers (kidney, liver, lung, bladder, and skin), ultimately leading to death.
As in water, the arsenic exists mainly in the form of As (III) and As (V) inorganic forms, the toxicity of As (III) is more than 60 times that of As (V), and As (III) has stronger mobility in water, so that the treatment effect of most water treatment methods on As (III) is obviously lower than that of As (V). Therefore, in actual processes, in order to improve the removal effect of As (iii), it is often necessary to pre-oxidize As (iii). However, because of the high redox potential of the As (III) -As (V) system, it is necessary to add a large amount of a strong oxidizing agent (e.g., Cl) to achieve a high As (III) oxidation efficiency2、O3Permanganate, Fenton reagent, etc.). Cl2Can generate Trihalomethanes (THMs) and haloacetic acids (HAAs) with organic matters in water to cause carcinogenicity, and is stopped being used by most countries. O is3Strong oxidizing power to As (III), but O3The system has high operating cost, and the insufficient collection of residual gas can cause certain influence on the human health. The permanganate can introduce manganese ions and potassium ions, which affects the operation of the subsequent water treatment process. For the Fenton reagent oxidation method, if the operation is improper, the oxidation effect can be greatly reduced, and the problem of residual iron ions in water or subsequent sludge disposal is easily caused. There are also drawbacks to the new advanced oxidation technology, such as UV/Fe (iii) generation of contaminated solid waste that must be further processed; UV/S2O8 2-The safety influence of the generated intermediate product on the water body is unknown; h2O2The cost is high, and the storage and transportation are difficult. Therefore, there is a strong need for a method of enablingEffectively oxidize As (III), and produce by-product and economic and efficient preoxidation means.
Nanobubbles (NBs) provide a new means for pre-oxidation of As (iii). Under natural conditions, a large amount of free hydroxyl radicals OH exist in the Nanobubble (NBs) aqueous solution, and OH has strong oxidizing property and can oxidize As (III) into As (V) with lower toxicity. And the NBs can stay in water for a long time, release of internal bearing gas into the water can be slowed down, the full utilization of the bearing gas is facilitated, and energy conservation and consumption reduction can be realized. Therefore, the method for pre-oxidizing As (III) in water by using NBs can improve the oxidation efficiency and the oxidation rate, save energy and reduce consumption, and is environment-friendly and economical. After arsenic in water is converted into As (V), further removal is needed. The common arsenic removal method mainly comprises the following steps: oxidation, coagulating sedimentation, ion exchange, membrane separation, adsorption, and the like. Compared with other methods, the adsorption method is simple and feasible, reproducible and good in selectivity. The active alumina is a common, cheap and efficient solid adsorbent, has porous adsorption and catalytic performances and large adsorption capacity. Therefore, activated alumina is selected As the adsorbent after As (iii) pre-oxidation.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a treatment system and a treatment process for arsenic-containing wastewater, wherein the As (III) in water is subjected to deep oxidation treatment by utilizing nano bubbles to be converted into As (V), and the As (V) is adsorbed by utilizing activated alumina, so that the treatment efficiency of the arsenic-containing wastewater is high, and the treatment system and the treatment process are economic and environment-friendly.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a processing system for containing arsenic waste water, includes inlet tube and reaction tank I, I inside nanometer bubble generator that sets up of reaction tank, nanometer bubble generator passes through gas delivery pipe and connects the gas pitcher, I connection reaction tank II of reaction tank, it throws the hopper to set up the adsorbent on the reaction tank II, the outlet pipe is connected to reaction tank II.
The nano bubble generator comprises a nano ceramic tube, a hydrophobic molecular membrane is coated on the nano ceramic tube, a plurality of micropores are formed in the nano ceramic tube, and the diameter of each micropore is less than 100 nm.
The preparation process of the hydrophobic molecular membrane is as follows:
s1, carrying out ultrasonic treatment on the nano ceramic tube for 20-30min to remove pollutants attached to the surface, and washing the nano ceramic tube for multiple times by using water after the ultrasonic treatment is finished;
s2, rubber caps are plugged at two ends of the nano ceramic tube to prevent the interior of the ceramic tube from being exposed in the solution;
s3, placing the nano ceramic tube in the solution containing the surface coating material for 36-48h, and slightly stirring the nano ceramic tube during the period;
s4, taking the nano ceramic tube out of the solution containing the surface coating material, and washing the nano ceramic tube for multiple times by using deionized water and ethanol to remove the excessive solution of the surface coating material adsorbed on the surface of the nano ceramic tube;
s5, drying the processed nano ceramic tube for 24-48h under the vacuum condition of 60-80 ℃.
A first power device is arranged on the water inlet pipe, a first valve and a second valve which are used for controlling the water inflow are arranged on two sides of the first power device, and the water inflow is controlled to be 600-3/h。
The reaction tank II is connected with a precipitation tank, an arsenic detector is arranged in the precipitation tank, the precipitation tank is connected with an adsorbent collecting device, the precipitation tank is communicated with a water return pipe connected with a water inlet pipe, and the precipitation tank is connected with a water outlet pipe.
And the gas conveying pipe is provided with a valve, a barometer and a gas flowmeter for controlling the gas inflow, and the gas inflow is controlled to be 12-16L/h.
And a second power device is arranged on the water return pipe, and a third valve and a fourth valve are arranged on two sides of the second power device.
And a stirring device is arranged in the reaction tank II.
A process for an arsenic-containing wastewater treatment system, comprising the steps of:
s1 raw water enters the reaction tank I through the water inlet pipe and the first power device, is primarily filtered through the pre-filtering device arranged on the water inlet pipe, and is regulatedOne valve and the second valve control the water inlet quantity at 600-700m3/h；
S2, opening a valve on the gas delivery pipe, adjusting a barometer and a gas flowmeter, and enabling oxygen in the gas tank to enter the nano bubble generator at the air inflow of 12-16L/h, wherein the retention time of raw water in the reaction tank I is 20-40 min;
s3, adding an adsorbent into the reaction tank II through an adsorbent adding funnel, wherein the particle size of the adsorbent is 0.6-0.8mm, the adding amount of the adsorbent is 3.0-5.0g/L, starting a stirring device in the reaction tank II, and the reaction time of the adsorbent and raw water is 24-72 hours;
s4, the raw water enters a precipitation tank, the arsenic content in the raw water is detected by an arsenic detector, when the arsenic content in the raw water is greater than 0.1mg/L, the raw water enters the reaction tank I again through the power device II and the water return pipe, when the arsenic content in the raw water is less than or equal to 0.1mg/L, the raw water is discharged through the water outlet pipe, and the raw water treatment is finished;
and (S5) after the raw water treatment is finished, collecting the adsorbent by an adsorbent collecting device.
The adsorbent is activated alumina.
Compared with the prior art, the invention has the beneficial effects that:
1. the nano bubble technology and the adsorption technology are fully combined, so that the arsenic in the wastewater can be effectively removed, and the discharge amount of the arsenic meets the discharge standard.
2. The application nanobubble technique carries out preoxidation to As (III), nanobubbles can generate a large amount of hydroxyl radicals, the hydroxyl radicals have strong oxidizing property, the oxidation rate and the oxidation efficiency of As (III) are greatly improved, byproducts are not generated, secondary pollution is not generated, and the product is more environment-friendly.
3. The nano bubbles are used for pre-oxidation, so that the full utilization of the bearing gas can be realized besides the characteristic of high oxidation efficiency, and the energy conservation and consumption reduction can be realized. And the active alumina used as the adsorbent has large adsorption capacity, low cost and high efficiency. The combination of the two can not only improve the arsenic removal effect, but also reduce the operation cost.
4. The system has the advantages of small overall occupied area, simple process flow, high automation degree, low cost and convenient operation.
5. The size of the generated nanobubbles and the number of the generated nanobubbles can be controlled when the nanobubbles are produced, and the cost is saved.
Drawings
FIG. 1 is a system flow diagram of the present invention;
FIG. 2 is a structural diagram of the nanobubble generator of the present invention;
FIG. 3 is a cross-sectional view of the lateral structure of the nanobubble generator of the present invention;
FIG. 4 is a longitudinal structural sectional view of the nanobubble generator of the present invention;
FIG. 5 is a scanning electron microscope image of the nanobubble generator of the present invention;
FIG. 6 is a graph showing the relationship between the time of nanobubble injection (NBs) and the concentration of OH probes generated in the present invention.
Reference numerals shown in the drawings:
1. a first valve; 2. a first power unit; 3. a second valve; 4. a pre-filtration device; 5. a reaction tank I; 6. a nanobubble generator; 7. a gas tank; 8. a valve; 9. a barometer; 10. a gas flow meter; 11. a gas delivery pipe; 12. a reaction tank II; 13. a stirring device; 14. adding an adsorbent into a hopper; 15. a settling tank; 16. an arsenic detector; 17. an adsorbent collection device; 18. a third valve; 19. a second power unit; 20. a fourth valve; 21. a nano ceramic tube; 22. and (4) micro-pores.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The first embodiment is as follows:
as shown in figure 1, a processing system for arsenic-containing waste water, includes inlet tube and reaction tank I5, reaction tank I5 is inside to be set up nanometer bubble generator 6, nanometer bubble generator 6 passes through gas delivery pipe 11 and connects gas pitcher 7, reaction tank I5 is connected reaction tank II 12, set up adsorbent on reaction tank II 12 and throw feeder hopper 14, reaction tank II 12 is connected the outlet pipe.
As shown in fig. 2 to 5, the nano bubble generator 6 includes a nano ceramic tube 21, the nano ceramic tube 21 is coated with a hydrophobic molecular film, a stearic acid film is selected in this embodiment, the nano ceramic tube 21 is provided with a plurality of micropores 22, the pore diameter of the micropores 22 is less than 100nm, in this embodiment, the pore diameter of the micropores 22 is 60nm, and the size of the generated nano bubbles and the number of the generated nano bubbles are controlled by controlling the diameter and the number of the micropores 22, thereby saving the cost and avoiding the waste.
Further, the preparation process of the hydrophobic molecular membrane is as follows:
s1, carrying out ultrasonic treatment on the nano ceramic tube 21 for 20min to remove pollutants attached to the surface, and washing the nano ceramic tube with water for multiple times after the ultrasonic treatment is finished;
s2, rubber caps are plugged at two ends of the nano ceramic tube 21 to prevent the interior of the ceramic tube from being exposed in the solution;
s3, placing the nano ceramic tube 21 in a solution containing stearic acid for 36h, and slightly stirring the mixture during the period;
s4, taking the nano-ceramic tube 21 out of the solution containing stearic acid, washing the tube with deionized water and ethanol for several times to remove the excess stearic acid solution adsorbed on the surface of the nano-ceramic tube 21;
s5, the processed nano ceramic tube 21 is dried for 24 hours under the vacuum condition of 60 ℃.
Furthermore, set up first power device 2 on the inlet tube, 2 both sides of first power device set up first valve 1 and second valve 3 that are used for controlling the inflow, the inflow control is at 660m3/h。
Further, reaction tank II 12 is connected with precipitation tank 15, set up arsenic detector 16 in precipitation tank 15, precipitation tank 15 is connected adsorbent collection device 17, precipitation tank 15 communicates the wet return that is connected with the inlet tube, precipitation tank 15 is connected the outlet pipe.
Further, a valve 8 for controlling the air inflow, a barometer 9 and a gas flowmeter 10 are arranged on the gas delivery pipe 11, and the air inflow is controlled to be 14L/h
Further, a second power device 19 is arranged on the water return pipe, and a third valve 18 and a fourth valve 20 are arranged on two sides of the second power device 19.
Further, a stirring device 13 is arranged in the reaction tank II 12.
This system fully combines nanometer bubble technique and adsorption technology, can effectually get rid of the arsenic in the waste water, makes the emission of arsenic satisfy emission standard, utilizes nanometer bubble technique to carry out the pre-oxidation to As (III), and the nanometer bubble can produce a large amount of hydroxyl free radicals, and the hydroxyl free radical has strong oxidizing property, has improved the oxidation rate and the oxidation efficiency of As (III) greatly, does not produce the accessory substance, can not produce secondary pollution, environmental protection more. The nano bubbles are used for pre-oxidation, so that the full utilization of the bearing gas can be realized besides the characteristic of high oxidation efficiency, and the energy conservation and consumption reduction can be realized. The system has the advantages of small overall occupied area, simple process flow, high automation degree, low cost and convenient operation.
A process for an arsenic-containing wastewater treatment system, comprising the steps of:
s1 raw water enters a reaction tank I5 through a water inlet pipe and a first power device 2, primary filtration is carried out through a pre-filtering device 4 arranged on the water inlet pipe, impurities in the raw water are filtered, and the water inlet amount is controlled to be 650m by adjusting a first valve 1 and a second valve 33/h；
S2, a valve 8 on a gas conveying pipe 11 is opened, a barometer 9 and a gas flowmeter 10 are adjusted, oxygen in a gas tank 7 enters a nano bubble generator 6 with the air inflow of 14L/h, the oxygen is injected from two ends of a nano ceramic pipe 21, the oxygen is diffused from micropores 22 to generate required nano bubbles to enter a reaction tank I5, the retention time of raw water in the reaction tank I5 is 30min, a large amount of free hydroxyl radicals OH exist in a Nano Bubble (NBs) aqueous solution, OH has strong oxidizing property, As (III) can be oxidized into As (V) with lower toxicity, the Nano Bubbles (NBs) can stay in water for a long time, release of internal bearing gas into the water can be slowed, full utilization of the bearing gas is facilitated, energy conservation and consumption reduction can be realized, pre-oxidation of As (III) in the water by the NBs can not only improve the oxidation efficiency and the oxidation rate, meanwhile, the energy can be saved, the consumption can be reduced, and the environment is protected and the economy is realized.
The average concentration of. OH generated by Nanobubbles (NBs) was calculated using the following equation:
C＝(∫(C0-Ct)dt)/T
wherein C is the average OH formation concentration (. mu.M), C0The initial concentration of the molecular probe for detection, Ct is the concentration of the molecular probe after T (h), and T is the measurement time.
S3 adding an adsorbent into the reaction tank II 12 through the adsorbent adding hopper 14, wherein the particle size of the adsorbent is 0.7mm, the adding amount of the adsorbent is 4.0g/L, the stirring device 13 in the reaction tank II 12 is started, the raw water and the adsorbent can be uniformly stirred by rotation of the stirring device 13 and fully contacts with the adsorbent, the reaction time of the adsorbent and the raw water is 24 hours, in the embodiment, the adsorbent is activated alumina, and the activated alumina is a common, cheap and efficient solid adsorbent, has porous adsorption and catalytic performances, is large in adsorption capacity, and can save cost.
S4, the raw water enters a precipitation tank 15, the arsenic content in the raw water is detected by an arsenic detector 16, when the arsenic content in the raw water is more than 0.1mg/L, the raw water enters a reaction tank I5 again through a power device II and a water return pipe, when the arsenic content in the raw water is less than or equal to 0.1mg/L, the raw water is discharged through a water outlet pipe, and the raw water treatment is finished;
after the raw water treatment of S5 is completed, the adsorbent is collected by the adsorbent collecting device 17, so that the adsorbent is recycled, and resources are saved.
The implementation effect of the first embodiment:
the time for generating NBs by injecting gas into the nanobubble generator and the concentration of the probe for detecting OH are shown in FIG. 6, and NBs can continuously generate OH in As (III) -containing wastewater and continuously oxidize As (III).
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the features described above have similar functions to (but are not limited to) those disclosed in this application.

Claims (10)

1. A treatment system for arsenic-containing wastewater, characterized by: including inlet tube and reaction tank I (5), reaction tank I (5) are inside to be set up nanometer bubble generator (6), nanometer bubble generator (6) are through gas delivery pipe (11) connection gas pitcher (7), reaction tank I (5) are connected reaction tank II (12), set up the adsorbent on reaction tank II (12) and throw hopper (14), outlet pipe is connected in reaction tank II (12).
2. The system of claim 1, wherein: the nano bubble generator (6) comprises a nano ceramic tube (21), a hydrophobic molecular membrane is coated on the nano ceramic tube (21), a plurality of micropores (22) are formed in the nano ceramic tube (21), and the diameter of each micropore (22) is smaller than 100 nm.
3. The treatment system for arsenic-containing wastewater as claimed in claim 2, wherein the hydrophobic molecular membrane is prepared by the following steps:
s1, carrying out ultrasonic treatment on the nano ceramic tube (21) for 20-30min to remove pollutants attached to the surface, and washing the nano ceramic tube with water for multiple times after the ultrasonic treatment is finished;
s2, rubber caps are plugged at two ends of the nano ceramic tube (21) to prevent the interior of the ceramic tube from being exposed in the solution;
s3, placing the nano ceramic tube (21) in the solution containing the surface coating material for 36-48h, and slightly stirring the mixture;
s4, taking the nano ceramic tube (21) out of the solution containing the surface coating material, and washing the nano ceramic tube with deionized water and ethanol for multiple times to remove the excessive solution of the surface coating material adsorbed on the surface of the nano ceramic tube (21); s5, drying the processed nano ceramic tube (21) for 24-48h under the vacuum condition of 60-80 ℃.
4. A treatment system for arsenic-containing waste water according to any one of claims 1 to 3, wherein: a first power device (2) is arranged on the water inlet pipe, a first valve (1) and a second valve (3) for controlling the water inflow are arranged on two sides of the first power device (2), and the water inflow is controlled to be 600-700m3/h。
5. The system of claim 1, wherein: reaction tank II (12) is connected precipitation tank (15), set up arsenic detector (16) in precipitation tank (15), adsorbent collection device (17) is connected in precipitation tank (15), return water pipe that precipitation tank (15) intercommunication and inlet tube are connected, the outlet pipe is connected in precipitation tank (15).
6. A treatment system for arsenic-containing waste water according to any one of claims 1 to 5, wherein: and a valve (8) for controlling air inflow, a barometer (9) and a gas flowmeter (10) are arranged on the gas delivery pipe (11), and the air inflow is controlled to be 12-16L/h.
7. The system of claim 5, wherein: and a second power device (19) is arranged on the water return pipe, and a third valve (18) and a fourth valve (20) are arranged on two sides of the second power device (19).
8. A treatment system for arsenic-containing waste water according to any one of claims 1 to 7, wherein: and a stirring device (13) is arranged in the reaction tank II (12).
9. A process for an arsenic wastewater treatment system, comprising the steps of:
s1 raw water is fed through a water inlet pipe and a first power device (2)Enters a reaction tank I (5), carries out primary filtration through a pre-filtering device (4) arranged on a water inlet pipe, adjusts the first valve (1) and the second valve (3) to control the water inlet amount to be 600-fold-700 m3/h；
S2, opening a valve (8) on a gas conveying pipe (11), adjusting a barometer (9) and a gas flowmeter (10) to enable oxygen in a gas tank (7) to enter a nano bubble generator (6) with the air inflow of 12-16L/h, wherein the retention time of raw water in a reaction tank I (5) is 20-40 min;
s3, adding an adsorbent into a reaction tank II (12) through an adsorbent adding funnel (14), wherein the particle size of the adsorbent is 0.6-0.8mm, the adding amount of the adsorbent is 3.0-5.0g/L, starting a stirring device (13) in the reaction tank II (12), and the reaction time of the adsorbent and raw water is 24-72 hours;
s4, the raw water enters a precipitation tank (15), the arsenic content in the raw water is detected by an arsenic detector (16), when the arsenic content in the raw water is more than 0.1mg/L, the raw water enters a reaction tank I (5) again through a power device II and a water return pipe, when the arsenic content in the raw water is less than or equal to 0.1mg/L, the raw water is discharged through a water outlet pipe, and the raw water treatment is finished;
after the raw water treatment of S5 is completed, the adsorbent is collected by an adsorbent collecting device (17).
10. The process of claim 9, wherein the treatment system comprises: the adsorbent is activated alumina.
CN202110769427.8A 2021-07-07 2021-07-07 Treatment system and process for arsenic-containing wastewater Pending CN113371883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110769427.8A CN113371883A (en) 2021-07-07 2021-07-07 Treatment system and process for arsenic-containing wastewater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110769427.8A CN113371883A (en) 2021-07-07 2021-07-07 Treatment system and process for arsenic-containing wastewater

Publications (1)

Publication Number Publication Date
CN113371883A true CN113371883A (en) 2021-09-10

Family

ID=77581329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110769427.8A Pending CN113371883A (en) 2021-07-07 2021-07-07 Treatment system and process for arsenic-containing wastewater

Country Status (1)

Country Link
CN (1) CN113371883A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102531249A (en) * 2011-12-29 2012-07-04 同济大学 Method for removing As(III) by photocatalytic oxidation and coagulation
CN103351040A (en) * 2013-08-01 2013-10-16 中国水产科学研究院黄海水产研究所 Removing apparatus and removing method for inorganic arsenic in aquaculture underground seawater
CN106277178A (en) * 2016-08-05 2017-01-04 北京未名清源环保科技有限公司 A kind of micro-nano bubble degradation treatment system and method containing organic pollution water body
US20190083945A1 (en) * 2017-09-20 2019-03-21 New Jersey Institute Of Technology System, device, and method to manufacture nanobubbles
CN111729523A (en) * 2020-06-16 2020-10-02 上海交通大学 Method for generating nano bubbles with uniform and controllable particle size

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102531249A (en) * 2011-12-29 2012-07-04 同济大学 Method for removing As(III) by photocatalytic oxidation and coagulation
CN103351040A (en) * 2013-08-01 2013-10-16 中国水产科学研究院黄海水产研究所 Removing apparatus and removing method for inorganic arsenic in aquaculture underground seawater
CN106277178A (en) * 2016-08-05 2017-01-04 北京未名清源环保科技有限公司 A kind of micro-nano bubble degradation treatment system and method containing organic pollution water body
US20190083945A1 (en) * 2017-09-20 2019-03-21 New Jersey Institute Of Technology System, device, and method to manufacture nanobubbles
CN111729523A (en) * 2020-06-16 2020-10-02 上海交通大学 Method for generating nano bubbles with uniform and controllable particle size

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
孙彩娟: "纳米气泡对水中As（III）的去除性能研究", 《中国优秀博硕士学位论文全文数据库（硕士）—工程科技I辑》 *

Similar Documents

Publication Publication Date Title
CN102897889B (en) Method and device for purifying cadmium in waste water through nano zero-valent iron
WO2015081658A1 (en) Sludge treatment system and method therefor
CN206089281U (en) Steel industry sulphuric acid pickling liquid waste's processing recovery system
CN113371849A (en) Fenton iron mud separation and recycling method and device
CN205501051U (en) Landfill leachate degree of depth processing system based on ozone advanced oxidation
CN103102026A (en) Sudden raw water thallium pollution emergency treatment system and method
CN102992527A (en) Method for pre-treating high-concentration and non-degradable organic wastewater
CN208762301U (en) A kind of depth removes the device of cyanide in coking wastewater
CN208055154U (en) Sewage purifying and treating device
CN103951125B (en) EDTA cleans the treatment process of waste liquid and the reaction unit of correspondence thereof
CN106082530A (en) A kind of integrated treatment photovoltaic energy enterprise productive life method of wastewater treatment
CN107954504B (en) The technique for removing bisphenol-A in drinking water
CN113371883A (en) Treatment system and process for arsenic-containing wastewater
CN205473096U (en) Sour mother liquor effluent disposal system of purple urea
CN210012683U (en) Electroplating wastewater treatment device
CN215439972U (en) Be used for arsenic effluent treatment plant
CN106219866A (en) A kind of sewage aeration processing equipment processed with waste gas purification
CN205892984U (en) Production life effluent disposal system of photovoltaic energy enterprise
CN203360177U (en) Arsenical waste water treatment system
CN110215824A (en) A kind of method and system of wet-treating nitrous oxides exhaust gas
CN102633393B (en) Nanotechnology integral treating device for inorganic/ organic waste water
CN206767893U (en) A kind of integrated aquaculture wastewater processing equipment
CN205461801U (en) Organic waste gas processing system based on composite Biological catalytic technology
CN113354060A (en) Method for realizing efficient degradation of environmental pollutants by using red phosphorus in ferric iron/persulfate system
CN207498239U (en) A kind of urban domestic wastewater processing unit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination