CN114275968A - Wastewater treatment system and wastewater treatment process - Google Patents

Wastewater treatment system and wastewater treatment process Download PDF

Info

Publication number
CN114275968A
CN114275968A CN202111540337.8A CN202111540337A CN114275968A CN 114275968 A CN114275968 A CN 114275968A CN 202111540337 A CN202111540337 A CN 202111540337A CN 114275968 A CN114275968 A CN 114275968A
Authority
CN
China
Prior art keywords
unit
water
weight
precipitation
parts
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
CN202111540337.8A
Other languages
Chinese (zh)
Inventor
叶俊麟
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.)
Jiangsu Suqian Runtai Environmental Protection Technology Co ltd
Original Assignee
Jiangsu Suqian Runtai Environmental Protection Technology Co ltd
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 Jiangsu Suqian Runtai Environmental Protection Technology Co ltd filed Critical Jiangsu Suqian Runtai Environmental Protection Technology Co ltd
Priority to CN202111540337.8A priority Critical patent/CN114275968A/en
Publication of CN114275968A publication Critical patent/CN114275968A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a wastewater treatment system, which comprises a precipitation device (1), a filtering device (2) and a disinfection and purification device (3); the filtering device uses filtering agent based on activated carbon, and the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines. The invention adopts the filtering agent based on the activated carbon to treat organic micromolecular pollutants, heavy metals and solid particles which are difficult to remove in the sewage. The activated carbon, the diatomite and the zeolite are mixed and dried, the activated carbon and the diatomite can uniformly cover the surface of the zeolite, the surface area of a sewage treatment agent is greatly increased, the adsorption effect of the activated carbon and the diatomite is fully utilized, and the treatment effect on solid particles and organic pollutants which are difficult to go out is better.

Description

Wastewater treatment system and wastewater treatment process
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment system and a wastewater treatment process.
Background
With the rapid development of economy, the living standard of people in China is qualitatively improved. However, the increase in economic and living standards also brings about serious damage to the natural environment, especially water resources. Every day, China discharges a large amount of industrial wastewater and domestic sewage, which contains various organic pollutants, heavy metals, microorganisms, solid particles and the like, and brings great burden to the sewage treatment work of China.
The current sewage treatment mode mainly depends on the traditional process, the traditional process has long flow, a large number of workers are needed to maintain equipment, the operation and management are very complicated, and the traditional treatment process is also greatly challenged by the large-amount sewage discharge in the modern society. In addition, the quality of articles for daily use is improved by people in modern society, a large amount of package pollution is brought, a large amount of solid particles, heavy metals and organic wastes which are difficult to degrade are generated after the pollutants enter a water source, the pollution degree of a plurality of waste gas and sewage is even close to that of industrial wastewater, the current domestic sewage treatment process has poor effect on the industrial wastewater, the damage degree to equipment in the treatment process is extremely high, the consumption of various water treatment agents is also extremely high, and the treatment cost is improved.
For the reasons, a novel sewage treatment process is urgently needed to be researched to meet the requirement of modern domestic sewage treatment, simplify the sewage treatment process and reduce the sewage treatment cost.
Disclosure of Invention
In order to solve the above problems, the present invention provides a wastewater treatment system and a wastewater treatment process.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit;
the filtering device uses an activated carbon-based filtering agent, and the activated carbon-based filtering agent is prepared by the following steps:
mixing 100 parts by weight of activated carbon, 20-25 parts by weight of diatomite and 30-40 parts by weight of zeolite, adding 300-400 parts by weight of distilled water, performing ultrasonic treatment, filtering, washing a filter cake with 100-200 parts by weight of detergent, drying at 100-150 ℃, crushing to a particle size of 200-300 mu m to obtain solid powder, mixing the obtained solid powder with 15-22 parts by weight of tributyl phosphate, 5-8 parts by weight of polyethylene glycol, 3-6 parts by weight of polyvinyl pyrrolidone, 4-8 parts by weight of disodium ethylenediamine tetraacetic acid and 400-450 parts by weight of water, heating to 100-150 ℃, stirring for 10 minutes, adding 5-7 parts by weight of gelatin, stirring for 10 minutes, performing extrusion molding, and performing vacuum drying at 30-50 ℃ to obtain a filter agent based on activated carbon;
the detergent is water or ethanol.
Preferably, the settling device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines.
Preferably, the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
Preferably, the detergent is water.
A process for wastewater treatment comprising the steps of:
Figure DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, forming air-dissolved water through air-dissolved flotation, enabling the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
Figure 379188DEST_PATH_IMAGE002
step (ii) of
Figure 279011DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure DEST_PATH_IMAGE003
step (ii) of
Figure 845122DEST_PATH_IMAGE002
The treated clear water enters an anaerobic aerobic unit, oxygen is added into the anaerobic aerobic unit, the aerobic microorganisms in the anaerobic aerobic unit decompose the residual organic pollutants, and the organic pollutants in the anaerobic aerobic unit are decomposed along with the decomposition of the organic pollutantsThe water is gradually changed from aerobic state to anaerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clear water enters the MBR unit and is filtered through the MBR membrane, and the treated water is generated.
Preferably, the MBR membrane is a hollow fiber membrane.
Compared with the prior art, the invention has the following advantages:
the invention adopts the filtering agent based on the activated carbon to treat organic micromolecular pollutants, heavy metals and solid particles which are difficult to remove in the sewage. The activated carbon, the diatomite and the zeolite are mixed and dried, the activated carbon and the diatomite can uniformly cover the surface of the zeolite, the surface area of a sewage treatment agent is greatly increased, the adsorption effect of the activated carbon and the diatomite is fully utilized, and the treatment effect on solid particles and organic pollutants which are difficult to go out is better. Meanwhile, disodium ethylene diamine tetraacetate, polyvinyl pyrrolidone, polyethylene glycol and the like are added, so that the composite material has excellent coordination performance and has a very good treatment effect on heavy metal ions in sewage. According to the invention, gelatin is added in the process of preparing the activated carbon-based filtering agent, the prepared filtering agent particles are stable in state, and the phenomenon that the particles are gradually crushed after long-term use to cause blockage or lower abdomen effect is not reduced is avoided.
The anaerobic and aerobic unit can remove small molecular organic matters through further microbial decomposition, and the MBR unit can remove microbes in sewage through the filtering action of the MBR membrane.
The sewage treatment stage of the invention is totally simplified into 3 processes, including (1) precipitation, (2) filtration, (3) disinfection and purification, the treatment process is greatly simplified, the sewage treatment effect is greatly improved, the cost is low, the sewage treatment capacity is large, and the invention is suitable for the requirements of sewage treatment in the modern society.
Detailed Description
The invention aims to provide a wastewater treatment system and a wastewater treatment process, which are realized by the following technical scheme:
a wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit;
the filtering device uses an activated carbon-based filtering agent, and the activated carbon-based filtering agent is prepared by the following steps:
mixing 100 parts by weight of activated carbon, 20-25 parts by weight of diatomite and 30-40 parts by weight of zeolite, adding 300-400 parts by weight of distilled water, performing ultrasonic treatment, filtering, washing a filter cake with 100-200 parts by weight of detergent, drying at 100-150 ℃, crushing to a particle size of 200-300 mu m to obtain solid powder, mixing the obtained solid powder with 15-22 parts by weight of tributyl phosphate, 5-8 parts by weight of polyethylene glycol, 3-6 parts by weight of polyvinyl pyrrolidone, 4-8 parts by weight of disodium ethylenediamine tetraacetic acid and 400-450 parts by weight of water, heating to 100-150 ℃, stirring for 10 minutes, adding 5-7 parts by weight of gelatin, stirring for 10 minutes, performing extrusion molding, and performing vacuum drying at 30-50 ℃ to obtain a filter agent based on activated carbon;
the detergent is water or ethanol.
Preferably, the settling device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines.
Preferably, the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
Preferably, the detergent is water.
A process for wastewater treatment comprising the steps of:
Figure 84473DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, forming air-dissolved water through air-dissolved flotation, enabling the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
the flocculating agent can be one or more of polyaluminium chloride, polyferric sulfate or polyacrylamide;
the dissolved air floatation forms dissolved air water, the air which can be sent into an air tank by an air compressor is brought into the dissolved air tank through a jet device, and is forcedly dissolved in the water under the pressure of about 0.35Mpa to form the dissolved air water;
Figure 445047DEST_PATH_IMAGE002
step (ii) of
Figure 832166DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure 139651DEST_PATH_IMAGE003
step (ii) of
Figure 30247DEST_PATH_IMAGE002
The treated clean water enters an anaerobic aerobic unit, oxygen is charged into the anaerobic aerobic unit, the residual organic pollutants are decomposed by using aerobic microorganisms in the anaerobic aerobic unit, along with the decomposition of the organic pollutants, the water in the anaerobic unit is gradually changed into an anaerobic state from an aerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through MBR membrane filtration.
Preferably, the MBR membrane is a hollow fiber membrane.
Example 1
An activated carbon-based filtering agent is prepared by the following steps:
mixing 100kg of activated carbon, 20kg of diatomite and 30kg of zeolite, adding 300kg of distilled water, carrying out ultrasonic treatment, filtering, washing a filter cake with 100kg of water, drying at 100-105 ℃, crushing to obtain solid powder with the particle size of 200-210 mu m, mixing the obtained solid powder with 15kg of tributyl phosphate, 5kg of polyethylene glycol, 3kg of polyethylene pyrrolidone, 4kg of disodium ethylene diamine tetraacetate and 400kg of water, heating to 100-105 ℃, stirring for 10 minutes, adding 5kg of gelatin, stirring for 10 minutes, carrying out extrusion molding, and carrying out vacuum drying at 30-35 ℃ to obtain the activated carbon-based filtering agent.
Example 2
An activated carbon-based filtering agent is prepared by the following steps:
mixing 100kg of activated carbon, 25kg of diatomite and 40kg of zeolite, adding 400kg of distilled water, carrying out ultrasonic treatment, filtering, washing a filter cake with 200kg of ethanol, drying at 145-150 ℃, crushing to obtain solid powder with the particle size of 290-300 mu m, mixing the obtained solid powder with 22kg of tributyl phosphate, 8kg of polyethylene glycol, 6kg of polyethylene pyrrolidone, 8kg of disodium ethylene diamine tetraacetate and 450kg of water, heating to 100-150 ℃, stirring for 10 minutes, adding 7kg of gelatin, stirring for 10 minutes, carrying out extrusion molding, and carrying out vacuum drying at 45-50 ℃ to obtain the activated carbon-based filtering agent.
Example 3
An activated carbon-based filtering agent is prepared by the following steps:
mixing 100kg of activated carbon, 22kg of diatomite and 32kg of zeolite, adding 380kg of distilled water, carrying out ultrasonic treatment, filtering, washing a filter cake with 180kg of ethanol, drying at 110-120 ℃, crushing to obtain solid powder with the particle size of 220-230 microns, mixing the obtained solid powder with 18kg of tributyl phosphate, 6kg of polyethylene glycol, 4kg of polyethylene pyrrolidone, 5kg of disodium ethylene diamine tetraacetate and 415kg of water, heating to 110-115 ℃, stirring for 10 minutes, adding 6kg of gelatin, stirring for 10 minutes, carrying out extrusion molding, and carrying out vacuum drying at 35-40 ℃ to obtain the activated carbon-based filtering agent.
Example 4
An activated carbon-based filtering agent is prepared by the following steps:
mixing 100kg of activated carbon, 24kg of diatomite and 36kg of zeolite, adding 350kg of distilled water, carrying out ultrasonic treatment, filtering, washing a filter cake with 150kg of water, drying at 130-135 ℃, crushing to a particle size of 270-280 microns to obtain solid powder, mixing the obtained solid powder with 20kg of tributyl phosphate, 7kg of polyethylene glycol, 5kg of polyethylene pyrrolidone, 6kg of disodium ethylene diamine tetraacetate and 430kg of water, heating to 130-135 ℃, stirring for 10 minutes, adding 6.5kg of gelatin, stirring for 10 minutes, carrying out extrusion molding, and carrying out vacuum drying at 40-45 ℃ to obtain the activated carbon-based filtering agent.
Example 5
A wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit; the activated carbon-based filtering agent obtained in example 1 was used in a filtering apparatus;
the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines;
the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
Example 6
A wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit; the activated carbon-based filter obtained in example 2 was used in a filtration apparatus;
the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines;
the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
Example 7
A wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit; the activated carbon-based filter obtained in example 3 was used in a filtration apparatus;
the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines;
the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
Example 8
A wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit; the activated carbon-based filter obtained in example 4 was used in a filtration apparatus;
the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines;
the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
Example 9
A wastewater treatment process adopts the wastewater treatment system in the embodiment 1, and specifically comprises the following steps:
Figure 827301DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, adding air-dissolved water to enable the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
the flocculating agent is selected from polyacrylamide;
the dissolved air floatation forms dissolved air water, the air which can be sent into an air tank by an air compressor is brought into the dissolved air tank through a jet device, and is forcedly dissolved in the water under the pressure of about 0.35Mpa to form the dissolved air water;
Figure 866496DEST_PATH_IMAGE002
step (ii) of
Figure 39989DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure 50670DEST_PATH_IMAGE003
step (ii) of
Figure 956309DEST_PATH_IMAGE002
The treated clean water enters an anaerobic aerobic unit, oxygen is charged into the anaerobic aerobic unit, the residual organic pollutants are decomposed by using aerobic microorganisms in the anaerobic aerobic unit, along with the decomposition of the organic pollutants, the water in the anaerobic unit is gradually changed into an anaerobic state from an aerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through MBR membrane filtration.
Example 10
A wastewater treatment process, using the wastewater treatment system of example 2, comprising the steps of:
Figure 52441DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, adding air-dissolved water to enable the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
the flocculant is polyaluminium chloride;
the dissolved air floatation forms dissolved air water, the air which can be sent into an air tank by an air compressor is brought into the dissolved air tank through a jet device, and is forcedly dissolved in the water under the pressure of about 0.35Mpa to form the dissolved air water;
Figure 764045DEST_PATH_IMAGE002
step (ii) of
Figure 566916DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure 705773DEST_PATH_IMAGE003
step (ii) of
Figure 289201DEST_PATH_IMAGE002
The treated clean water enters an anaerobic aerobic unit, oxygen is charged into the anaerobic aerobic unit, the residual organic pollutants are decomposed by using aerobic microorganisms in the anaerobic aerobic unit, along with the decomposition of the organic pollutants, the water in the anaerobic unit is gradually changed into an anaerobic state from an aerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through MBR membrane filtration.
Example 11
A wastewater treatment process using the wastewater treatment system of example 3, comprising the steps of:
Figure 538917DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, adding air-dissolved water to enable the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
the flocculating agent is selected from polymeric ferric sulfate and polyacrylamide;
the dissolved air floatation forms dissolved air water, the air which can be sent into an air tank by an air compressor is brought into the dissolved air tank through a jet device, and is forcedly dissolved in the water under the pressure of about 0.35Mpa to form the dissolved air water;
Figure 461874DEST_PATH_IMAGE002
step (ii) of
Figure 771632DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure 842357DEST_PATH_IMAGE003
step (ii) of
Figure 331981DEST_PATH_IMAGE002
The treated clean water enters an anaerobic-aerobic unit, oxygen is added into the anaerobic-aerobic unit, the aerobic microorganisms in the anaerobic-aerobic unit are used for decomposing the residual organic pollutants, along with the decomposition of the organic pollutants, the water in the unit is gradually changed from an aerobic state to an anaerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through the filtration of an MBR membrane;
the MBR membrane is a hollow fiber membrane.
Example 12
A wastewater treatment process using the wastewater treatment system of example 4, comprising the steps of:
Figure 171761DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, adding air-dissolved water to enable the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
the flocculating agent is selected from polyaluminium chloride and polyacrylamide;
the dissolved air floatation forms dissolved air water, the air which can be sent into an air tank by an air compressor is brought into the dissolved air tank through a jet device, and is forcedly dissolved in the water under the pressure of about 0.35Mpa to form the dissolved air water;
Figure 652421DEST_PATH_IMAGE002
step (ii) of
Figure 882546DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filterRemoving micromolecular organic matters, heavy metals and solid particle impurities in the waste water by using a filtering agent based on activated carbon;
Figure 739643DEST_PATH_IMAGE003
step (ii) of
Figure 433930DEST_PATH_IMAGE002
The treated clean water enters an anaerobic-aerobic unit, oxygen is added into the anaerobic-aerobic unit, the aerobic microorganisms in the anaerobic-aerobic unit are used for decomposing the residual organic pollutants, along with the decomposition of the organic pollutants, the water in the unit is gradually changed from an aerobic state to an anaerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through the filtration of an MBR membrane;
the MBR membrane is a hollow fiber membrane.
Comparative example 1
A wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit; a conventional activated carbon filtering agent is used in the filtering device;
the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines;
the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
A process for treating wastewater adopts the wastewater treatment system, and specifically comprises the following steps:
Figure 23174DEST_PATH_IMAGE001
introducing wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after entering a coagulation reaction unit, fully mixing, entering a precipitation unit for natural precipitation, enabling supernatant to enter a micro-electrolysis unit, removing metal salt in the supernatant through electrolysis, then entering an air flotation unit, adding dissolved air water, and enabling the generated sludge to float on the surfaceRemoving sludge on the surface to obtain clear water to be treated;
the flocculating agent is selected from polyaluminium chloride and polyacrylamide;
the dissolved air floatation forms dissolved air water, the air which can be sent into an air tank by an air compressor is brought into the dissolved air tank through a jet device, and is forcedly dissolved in the water under the pressure of about 0.35Mpa to form the dissolved air water;
Figure 68490DEST_PATH_IMAGE002
step (ii) of
Figure 463700DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure 950176DEST_PATH_IMAGE003
step (ii) of
Figure 38217DEST_PATH_IMAGE002
The treated clean water enters an anaerobic-aerobic unit, oxygen is added into the anaerobic-aerobic unit, the aerobic microorganisms in the anaerobic-aerobic unit are used for decomposing the residual organic pollutants, along with the decomposition of the organic pollutants, the water in the unit is gradually changed from an aerobic state to an anaerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through the filtration of an MBR membrane;
the MBR membrane is a hollow fiber membrane.
200L of industrial sewage of a certain chemical plant is taken, the content of main pollution factors in the industrial sewage is detected before the test, a full-automatic water quality analyzer is adopted for detecting, the content of metal ions is detected by an ultraviolet spectrophotometer, the sewage is treated by adopting the wastewater treatment process of the embodiment 9-12, and the detection result is shown in the table 1;
COD,mg/l suspended substance, mg/l Ammonia nitrogen, mg/l Cu2+,mg/l Pb2+,mg/l
Sewage before treatment 6500 640 65 7.8 2.5
Example 9 650 18 8 0.03 0.03
Example 10 710 14 7 0.01 0.02
Example 11 550 11 5 0.01 0.02
Example 12 520 10 5 Not detected out 0.01
Comparative example 2500 85 24 1.54 1.24
As can be seen from the results in table 1, the processes for wastewater treatment described in examples 9 to 12 can effectively treat COD, suspended matters, ammonia nitrogen and metal ions in organic wastewater, and the removal effect is limited, and since the common activated carbon filtering agent is used in the comparative example, the removal effect of COD, suspended matters, ammonia nitrogen and metal ions in organic wastewater is significantly lower than that of examples 9 to 12.

Claims (6)

1. A wastewater treatment system comprising (1) a precipitation unit, (2) a filtration unit, (3) a disinfection and purification unit; the method is characterized in that:
the filtering device uses an activated carbon-based filtering agent, and the activated carbon-based filtering agent is prepared by the following steps:
mixing 100 parts by weight of activated carbon, 20-25 parts by weight of diatomite and 30-40 parts by weight of zeolite, adding 300-400 parts by weight of distilled water, performing ultrasonic treatment, filtering, washing a filter cake with 100-200 parts by weight of detergent, drying at 100-150 ℃, crushing to a particle size of 200-300 mu m to obtain solid powder, mixing the obtained solid powder with 15-22 parts by weight of tributyl phosphate, 5-8 parts by weight of polyethylene glycol, 3-6 parts by weight of polyvinyl pyrrolidone, 4-8 parts by weight of disodium ethylenediamine tetraacetic acid and 400-450 parts by weight of water, heating to 100-150 ℃, stirring for 10 minutes, adding 5-7 parts by weight of gelatin, stirring for 10 minutes, performing extrusion molding, and performing vacuum drying at 30-50 ℃ to obtain a filter agent based on activated carbon;
the detergent is water or ethanol.
2. A wastewater treatment system according to claim 1, characterized in that: the precipitation device comprises: the device comprises a pretreatment adjusting unit, a coagulation reaction unit, a precipitation unit, a micro-electrolysis unit and an air flotation unit, wherein all the units are communicated in sequence through pipelines.
3. A wastewater treatment system according to claim 1, characterized in that: the disinfection and purification device comprises an anaerobic-aerobic unit and an MBR unit which are communicated through a pipeline.
4. A wastewater treatment system according to claim 1, characterized in that: the detergent is water.
5. A process for wastewater treatment, which is characterized by comprising the following steps: the method comprises the following steps:
Figure 164626DEST_PATH_IMAGE001
introducing the wastewater into a precipitation device, adjusting the pH value of the wastewater to 3-9 in a pretreatment adjusting unit, adding a flocculating agent after the wastewater enters a coagulation reaction unit, fully mixing, naturally precipitating in a precipitation unit, removing metal salts in a supernatant liquid after the supernatant liquid enters a micro-electrolysis unit through electrolysis, then entering an air flotation unit, forming air-dissolved water through air-dissolved flotation, enabling the generated sludge to float on the surface, and removing the sludge on the surface to obtain clear water to be treated;
Figure 799744DEST_PATH_IMAGE002
step (ii) of
Figure 203044DEST_PATH_IMAGE001
The obtained clear water to be treated enters a filtering device, and micromolecular organic matters, heavy metals and solid particle impurities in the clear water are removed through a filtering agent based on active carbon;
Figure 461987DEST_PATH_IMAGE003
step (ii) of
Figure 153999DEST_PATH_IMAGE002
The treated clean water enters an anaerobic aerobic unit, oxygen is charged into the anaerobic aerobic unit, the residual organic pollutants are decomposed by using aerobic microorganisms in the anaerobic aerobic unit, along with the decomposition of the organic pollutants, the water in the anaerobic unit is gradually changed into an anaerobic state from an aerobic state, activated sludge is generated through precipitation, the sludge is precipitated to the bottom, the upper layer clean water enters an MBR unit, and the treated water is generated through MBR membrane filtration.
6. A process according to claim 5, characterized in that: the MBR membrane is a hollow fiber membrane.
CN202111540337.8A 2021-12-16 2021-12-16 Wastewater treatment system and wastewater treatment process Pending CN114275968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111540337.8A CN114275968A (en) 2021-12-16 2021-12-16 Wastewater treatment system and wastewater treatment process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111540337.8A CN114275968A (en) 2021-12-16 2021-12-16 Wastewater treatment system and wastewater treatment process

Publications (1)

Publication Number Publication Date
CN114275968A true CN114275968A (en) 2022-04-05

Family

ID=80872458

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111540337.8A Pending CN114275968A (en) 2021-12-16 2021-12-16 Wastewater treatment system and wastewater treatment process

Country Status (1)

Country Link
CN (1) CN114275968A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115583751A (en) * 2022-10-12 2023-01-10 天津中环领先材料技术有限公司 Epitaxial wafer washing water treatment device and treatment method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103143204A (en) * 2013-03-27 2013-06-12 李彤 Method for preparing active carbon composite filter core
CN106902788A (en) * 2017-03-31 2017-06-30 中国海洋石油总公司 A kind of preparation method of heavy metal absorbent
CN107022411A (en) * 2017-06-05 2017-08-08 蚌埠市江淮粮油有限公司 A kind of preparation method of giving off a strong fragrance rapeseed oil
CN108264194A (en) * 2018-01-09 2018-07-10 奇瑞汽车股份有限公司 A kind of MBR Wastewater Disposal Line of Automobile Coating and treatment process
CN109502911A (en) * 2018-12-20 2019-03-22 江苏迈奥环保科技有限公司 A kind of sewage water treatment method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103143204A (en) * 2013-03-27 2013-06-12 李彤 Method for preparing active carbon composite filter core
CN106902788A (en) * 2017-03-31 2017-06-30 中国海洋石油总公司 A kind of preparation method of heavy metal absorbent
CN107022411A (en) * 2017-06-05 2017-08-08 蚌埠市江淮粮油有限公司 A kind of preparation method of giving off a strong fragrance rapeseed oil
CN108264194A (en) * 2018-01-09 2018-07-10 奇瑞汽车股份有限公司 A kind of MBR Wastewater Disposal Line of Automobile Coating and treatment process
CN109502911A (en) * 2018-12-20 2019-03-22 江苏迈奥环保科技有限公司 A kind of sewage water treatment method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
核工业第二研究设计院主编: "《给水排水设计手册 第2册，建筑给水排水》", 31 May 2001, 中国建筑工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115583751A (en) * 2022-10-12 2023-01-10 天津中环领先材料技术有限公司 Epitaxial wafer washing water treatment device and treatment method

Similar Documents

Publication Publication Date Title
CN101508514B (en) Zero discharge recycle treatment method for garbage leachate
CN203568944U (en) Coking wastewater reuse treatment system
CN102167452B (en) Method and system for treating landfill leachate
CN108483743B (en) Coating wastewater treatment system and method
CN105084661A (en) Coal-based ethylene glycol sewage treatment method and system
CN110002639A (en) A kind of processing unit and method of middle and advanced stage aged refuse in MSW landfill percolate
CN110894125A (en) Sewage treatment process for recycling N-methyl pyrrolidone
CN102344225B (en) Processing method of salty wastewater in cellulose ether production
CN114262093B (en) Fluorine treatment method and comprehensive treatment method for wet electronic chemical wastewater
CN114275968A (en) Wastewater treatment system and wastewater treatment process
CN113149352A (en) System and method for deeply recycling urban reclaimed water into industrial water of thermal power plant
CN106242181A (en) A kind of coal chemical industrial waste water administering method of economical and efficient
CN111252961B (en) Treatment method of garbage penetrating fluid
CN205222944U (en) Sewage treatment system
CN104787964A (en) Method and device for treating sewage and producing biogas
CN216236438U (en) Pretreatment system for garbage extrusion leachate
CN215049500U (en) System for deep reuse of urban reclaimed water into industrial water of thermal power plant
CN212504490U (en) Landfill leachate treatment device
CN112441689B (en) Membrane concentrate harmless treatment system and method
CN210215082U (en) COD's degradation system in waste water
KR20020018572A (en) Electro coagulation and Bio-wrinkled circulation nutrients removal system
CN113880223A (en) Treating agent and method for producing sewage based on bulk drugs
CN113307419A (en) Small garbage transfer station leachate treatment device and treatment method
CN111499097A (en) Municipal sewage treatment process
CN111925008A (en) Ozone treatment process for advanced sewage treatment

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20220405

RJ01 Rejection of invention patent application after publication