CN107337250A - A kind of processing method of waste water - Google Patents

A kind of processing method of waste water Download PDF

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Publication number
CN107337250A
CN107337250A CN201710798972.3A CN201710798972A CN107337250A CN 107337250 A CN107337250 A CN 107337250A CN 201710798972 A CN201710798972 A CN 201710798972A CN 107337250 A CN107337250 A CN 107337250A
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fixed
bed
valve
pei
adsorption
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谢新玲
高红亮
秦祖赠
苏通明
纪红兵
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Guangxi University
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Guangxi University
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    • 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
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/324—Inorganic material layers containing free carbon, e.g. activated carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
    • 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
    • C02F2101/20—Heavy metals or heavy metal compounds

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Materials Engineering (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The present invention discloses a kind of processing method of waste water containing cadmium ion, this method is carried on activated carbon (AC) using polyethyleneimine (PEI) and is used as adsorbent, it is placed in fixed adsorption bed, fixed-bed adsorber is entered with 1mL/min containing the waste water that concentration of cadmium ions is 0.05~20mg/L, continuously adsorbed under 25 DEG C of normal pressures, the content of the cadmium ion in waste water can be made to be reduced to below 0.05mg/L, the PEI/AC adsorbents of adsorption saturation regenerate after 0.1mol/L HCl solution washing.Advantages of the present invention：Technique is simple, novel, easy to operate, and clearance is high, and adsorbent repeats regeneration and is used for multiple times, and process is green.

Description

A kind of processing method of waste water
Technical field
The invention belongs to field of waste water treatment.The method that cadmium ion removes in specifically a kind of heavy metal ion-containing waste water.
Background technology
With Chinese society urbanization, it is industrialized develop rapidly, the water pollution situation in China is on the rise, most The water quality in city is all contaminated.Much sunk without treated municipal refuse, industrial wastewater and sanitary sewage and waste gas Product thing is continually drained in water body, steeply rises the content of beary metal in water body.According to statistics, a huge sum of money for China's river,lake and reservior substrate Category pollution rate is up to 80.1%.Except the heavy metal pollution of water body, the heavy metal pollution of soil phenomenon in China is also extremely serious. National Soil Pollution Investigation publication in 2014 shows that the total exceeding standard rate of national soil is 16.1%, and pollution type is with inorganic type Based on, account for the 82.8% of total super punctuation bit, mainly 8 kinds of cadmium, mercury, arsenic, lead, copper, nickel, chromium, zinc inorganic pollutions.With society Expanding economy, the living standard of people increasingly improve.But people are also faced with the ring of sternness while the modern life is enjoyed Border pollution problem (People's Republic of China's Environmental Protection Department, Ministry of Land and Resources, national Soil Pollution Investigation publication .2014- 4-17)。
Signified heavy metal is primarily referred to as the significant mercury of bio-toxicity, cadmium, lead, chromium and metalloid in terms of environmental pollution Arsenic, in addition to the pollutant such as the virose heavy metal zinc of tool, copper, cobalt, nickel, tin, vanadium.Heavy metal ion is in water body, soil A kind of important pollutant, is mainly derived from the filter of the waste water and solid waste landfills of the industrial discharges such as mining, metallurgy, plating Liquid.Because heavy metal element can not be biodegradable, once into water body and soil, it is difficult to eliminate.Therefore, various countries will weight Metallic element, particularly Pb, Cr, Cd, Zn, As and Hg etc. be classified as Environment Priority control pollutant (light science and technology, 2013,173 (4)：98-99).
Cadmium and cadmium class compound all have very big toxicity, and cadmium can be enriched with human body, to a certain degree afterwards can be to human body Organ and system cause different degrees of harm, insulting nerve, urinary system and immune system etc..Cadmium can not only influence Intracorporeal organ tissue, can also influence human body bone growing state, and internal cadmium content can cause " Itai-itai diseases " when too high, show as from So fracture, osteoporosis softening, bone gross distortion, lethal can die when serious.In addition, the cadmium in the aqueous solution can be easy to by Vegetables, crop absorb, and then cause person poultry poisoning by food chain effect indirect.Being capable of shadow when cadmium concentration is too high in water Ring growing and the death of fish and other aquatic animals being caused for aquatic crops.
The traditional handicraft of the heavy metal gone at present in water removal includes three major types：The first kind is chemical method, including chemical precipitation Method, heavy metal chelating agent method, ion exchange etc.；Second class is physical-chemical process, including absorption, UF membrane and solvent extraction etc.； 3rd class is biologic treating technique, and heavy metal, including biology are removed by effects such as the absorption and sorption of plant or microorganism, enrichments Absorption, plant ecological reparation etc. (guangdong agricultural science, 2008, (8)：143-146.).
The content of the invention
The present invention discloses a kind of processing method of heavy metal ion-containing waste water, and this method is environment-friendly, and technique is simple, newly Grain husk, easy to operate, clearance is high, and adsorbent repeats regeneration and is used for multiple times, and meets Green Chemistry requirement.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
1. a kind of processing method of waste water, it is characterised in that polyethyleneimine (PEI) is loaded to by activity by infusion process Adsorbent is used as on charcoal (AC) carrier, the heavy metal ion cadmium in waste water is removed using the attached method of fixed bed continuous adsorption.Step is as follows：
(1) preparation of adsorbent：By 50~400 mesh 5.0g graininess AC be added to 50mL concentration for 1.0~10.0g/L, Mixture is formed in the PEI ethanol solutions that molecular weight is 10000,5000 or 2500, by mixture in 75W ultrasonic cleaning instrument Scattered 30min, then stirs 1h at 300 rpm, by said mixture after 50 DEG C are heated to ethanol evaporating completely, spend from Sub- water washing 5 times, 12h is then dried in 50 DEG C of vacuum drying chamber, the PEI/AC that load capacity is 2~10wt% is made and adsorbs Agent.
(2) continuous adsorption process：Weigh 0.2g PEI/AC adsorbents to be put into fixed adsorption bed, under 25 DEG C of normal pressures, by cadmium The waste water that ion concentration is 0.05~20mg/L, by fixed adsorption bed, is carried out continuous adsorption reaction, gone out with 1mL/min flow velocity Removal of Cadmium from wastewater concentration is less than 0.05mg/L at mouthful.
(3) adsorbent reactivation：The PEI/AC adsorbents of adsorption saturation, are washed again using 0.1mol/L HCl solution Raw, desorption reaction occurs in HCl solution for 0.5~1mL/min of flow velocity, adsorbent PEI/AC, 30~60min of time, regenerates tail Cadmium ion containing high concentration in liquid, can be removed by the precipitation method.
The fixed bed continuous adsorption adsorption device is by wastewater feed pump 1, recovering liquid feed pump 2, inlet valve 3, inlet valve Door 4, inlet valve 5, inlet valve 6, fixed-bed adsorber 7, fixed-bed adsorber 8, outlet valve 9, outlet valve 10, outlet Valve 11, outlet valve 12 form.
Pending waste water is connected by wastewater feed pump 1 and inlet valve 5,6 with fixed-bed adsorber 7,8.Recovering liquid Connected by feed pump 2 and inlet valve 3,4 with fixed-bed adsorber 7,8.
2. continuous adsorption reaction is carried out in fixed-bed adsorber.0.2g (load capacity 10%) adsorbent is added to fixation In bed fillers layer, the 10mg/L Cd aqueous solution flows through fixed bed with 1.00mL/min, is continuously adsorbed, after 100min, measure Cd ion concentrations in solution after absorption.
The present invention compared with prior art, has the following advantages that：
1. the present invention is carried on activated carbon as adsorbent, using continuous in fixed-bed adsorber using polyethyleneimine Absorption method, technique is simple, easy to operate, and treating capacity is big.
2. the present invention, used adsorbent can repeatedly regenerate, and reuse, good economy performance, it is environment-friendly meet it is green Colour chemistry requirement.
Brief description of the drawings
Fig. 1 is preventing fixed bed adsorber structural representation of the present invention.
In Fig. 1, waste liquid feed pump 1 to be adsorbed, recovering liquid feed pump 2, inlet valve 3, inlet valve 4, inlet valve 5th, inlet valve 6, fixed-bed adsorber 7, fixed-bed adsorber 8, outlet valve 9, outlet valve 10, outlet valve 11, outlet Valve 12.
Embodiment
The present invention is further detailed with reference to embodiment, but it should be noted that the present invention application not It is confined to these embodiments.
Fixed bed continuous adsorption adsorption device structure of the present invention is as shown in figure 1, by wastewater feed pump 1, recovering liquid feed pump 2, Valve 3,4,5,6,9,10,11,12, fixed-bed adsorber 7,8 forms.
During beginning, fixed bed 7 first carries out adsorption operations, and inlet valve 3,6 is closed, and inlet valve 5 is opened, outlet valve 10,11 are closed, and outlet valve 9 is opened.Waste water to be adsorbed is passed through in fixed-bed adsorber 7 by wastewater feed pump 1, is carried out continuous Adsorption reaction, fixed-bed adsorber is then flowed out by outlet valve 9.The now progress of fixed bed 8 regenerated from washing operation, valve 4, 12 are opened, and recovering liquid is entered in fixed-bed adsorber 8 by recovering liquid feed pump 2, are carried out regenerated from washing reaction, are passed through valve The outflow regeneration tail washings of door 12.
After a period of time, switch the mode of operation of fixed-bed adsorber 7,8, upper end valve 4,5 is closed, and valve 3,6 is opened Open, bottom valve 9,12 is closed, and valve 10,11 is opened.Now fixed bed 7 carries out regenerated from washing operation, and fixed bed 8 is adsorbed Operation.
Embodiment 1
(1) that 200 mesh 5.0g graininess AC are added into the PEI ethanol that 50mL concentration is 4.0g/L, molecular weight is 2500 is molten Mixture is formed in liquid, mixture is disperseed into 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, will be upper Mixture is stated after 50 DEG C are heated to ethanol evaporating completely, is washed with deionized 5 times, then in 50 DEG C of vacuum drying chamber 12h is dried, the PEI/AC adsorbents that load capacity is 4wt% are made.
(2) the PEI/AC adsorbents that 0.2g load capacity is 4wt% are weighed to be put into fixed adsorption bed, will under 25 DEG C of normal pressures The waste water that concentration of cadmium ions is 20mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, 300min with 1mL/min flow velocity Removal of Cadmium from wastewater concentration in exit is less than 0.05mg/L afterwards.
(3) the PEI/AC adsorbents of adsorption saturation, regenerated from washing, flow velocity 1mL/ are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction occurs in HCl solution for min, adsorbent PEI/AC, time 30min, regenerates in tail washings and contains high concentration Cadmium ion, can be removed by the precipitation method.
Embodiment 2
(1) that 200 mesh 5.0g graininess AC are added into the PEI ethanol that 50mL concentration is 6.0g/L, molecular weight is 2500 is molten Mixture is formed in liquid, mixture is disperseed into 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, will be upper Mixture is stated after 50 DEG C are heated to ethanol evaporating completely, is washed with deionized 5 times, then in 50 DEG C of vacuum drying chamber 12h is dried, the PEI/AC adsorbents that load capacity is 6wt% are made.
(2) the PEI/AC adsorbents that 0.2g load capacity is 6wt% are weighed to be put into fixed adsorption bed, will under 25 DEG C of normal pressures The waste water that concentration of cadmium ions is 20mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, 400min with 1mL/min flow velocity Removal of Cadmium from wastewater concentration in exit is less than 0.05mg/L afterwards.
(3) the PEI/AC adsorbents of adsorption saturation, regenerated from washing, flow velocity 1mL/ are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction occurs in HCl solution for min, adsorbent PEI/AC, time 50min, regenerates in tail washings and contains high concentration Cadmium ion, can be removed by the precipitation method.
Embodiment 3
(1) that 400 mesh 5.0g graininess AC are added into the PEI ethanol that 50mL concentration is 4.0g/L, molecular weight is 5000 is molten Mixture is formed in liquid, mixture is disperseed into 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, will be upper Mixture is stated after 50 DEG C are heated to ethanol evaporating completely, is washed with deionized 5 times, then in 50 DEG C of vacuum drying chamber 12h is dried, the PEI/AC adsorbents that load capacity is 4wt% are made.
(2) the PEI/AC adsorbents that 0.2g load capacity is 4wt% are weighed to be put into fixed adsorption bed, will under 25 DEG C of normal pressures The waste water that concentration of cadmium ions is 20mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, 300min with 1mL/min flow velocity Removal of Cadmium from wastewater concentration in exit is less than 0.05mg/L afterwards.
(3) the PEI/AC adsorbents of adsorption saturation, regenerated from washing, flow velocity 1mL/ are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction occurs in HCl solution for min, adsorbent PEI/AC, time 30min, regenerates in tail washings and contains high concentration Cadmium ion, can be removed by the precipitation method.
Embodiment 4
(1) that 400 mesh 5.0g graininess AC are added into the PEI ethanol that 50mL concentration is 8.0g/L, molecular weight is 2500 is molten Mixture is formed in liquid, mixture is disperseed into 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, will be upper Mixture is stated after 50 DEG C are heated to ethanol evaporating completely, is washed with deionized 5 times, then in 50 DEG C of vacuum drying chamber 12h is dried, the PEI/AC adsorbents that load capacity is 8wt% are made.
(2) the PEI/AC adsorbents that 0.2g load capacity is 8wt% are weighed to be put into fixed adsorption bed, will under 25 DEG C of normal pressures The waste water that concentration of cadmium ions is 10mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, 400min with 1mL/min flow velocity Removal of Cadmium from wastewater concentration in exit is less than 0.05mg/L afterwards.
(3) the PEI/AC adsorbents of adsorption saturation, regenerated from washing, flow velocity 1mL/ are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction occurs in HCl solution for min, adsorbent PEI/AC, time 30min, regenerates in tail washings and contains high concentration Cadmium ion, can be removed by the precipitation method.
Embodiment 5
(1) that 400 mesh 5.0g graininess AC are added into the PEI ethanol that 50mL concentration is 10.0g/L, molecular weight is 5000 is molten Mixture is formed in liquid, mixture is disperseed into 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, will be upper Mixture is stated after 50 DEG C are heated to ethanol evaporating completely, is washed with deionized 5 times, then in 50 DEG C of vacuum drying chamber 12h is dried, the PEI/AC adsorbents that load capacity is 10wt% are made.
(2) the PEI/AC adsorbents that 0.2g load capacity is 10wt% are weighed to be put into fixed adsorption bed, will under 25 DEG C of normal pressures The waste water that concentration of cadmium ions is 20mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, 300min with 1mL/min flow velocity Removal of Cadmium from wastewater concentration in exit is less than 0.05mg/L afterwards.
(3) the PEI/AC adsorbents of adsorption saturation, regenerated from washing, flow velocity 1mL/ are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction occurs in HCl solution for min, adsorbent PEI/AC, time 40min, regenerates in tail washings and contains high concentration Cadmium ion, can be removed by the precipitation method.
Embodiment 6
(1) that 200 mesh 5.0g graininess AC are added into the PEI ethanol that 50mL concentration is 4.0g/L, molecular weight is 10000 is molten Mixture is formed in liquid, mixture is disperseed into 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, will be upper Mixture is stated after 50 DEG C are heated to ethanol evaporating completely, is washed with deionized 5 times, then in 50 DEG C of vacuum drying chamber 12h is dried, the PEI/AC adsorbents that load capacity is 4wt% are made.
(2) the PEI/AC adsorbents that 0.2g load capacity is 4wt% are weighed to be put into fixed adsorption bed, will under 25 DEG C of normal pressures The waste water that concentration of cadmium ions is 20mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, 200min with 1mL/min flow velocity Removal of Cadmium from wastewater concentration in exit is less than 0.05mg/L afterwards.
(3) the PEI/AC adsorbents of adsorption saturation, regenerated from washing, flow velocity 1mL/ are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction occurs in HCl solution for min, adsorbent PEI/AC, time 40min, regenerates in tail washings and contains high concentration Cadmium ion, can be removed by the precipitation method.

Claims (2)

1. a kind of processing method of waste water, it is characterised in that polyethyleneimine (PEI) is loaded to by activated carbon by infusion process (AC) adsorbent is used as on carrier, the heavy metal cadmium ion in waste water is removed using the attached method of fixed bed continuous adsorption.Step is as follows：
(1) preparation of adsorbent：By 50~400 mesh 5.0g granular active carbons (AC) be added to 50mL concentration for 1.0~ 10.0g/L, molecular weight 10000,5000 or 2500 polyethyleneimine (PEI) ethanol solution in form mixture, will mix Thing disperses 30min in 75W ultrasonic cleaning instrument, then stirs 1h at 300 rpm, said mixture is heated at 50 DEG C After ethanol evaporating completely, it is washed with deionized 5 times, 12h is then dried in 50 DEG C of vacuum drying chamber, obtained load capacity is 2~10wt% polyethyleneimine is carried on absorbent charcoal carrier (PEI/AC) adsorbent.
(2) continuous adsorption process：Weigh 0.2g PEI/AC adsorbents to be put into fixed adsorption bed, under 25 DEG C of normal pressures, by cadmium ion The waste water that concentration is 0.05~20mg/L, by fixed adsorption bed, carries out continuous adsorption reaction, exit with 1mL/min flow velocity Removal of Cadmium from wastewater concentration is less than 0.05mg/L.
(3) adsorbent reactivation：The PEI/AC adsorbents of adsorption saturation, regenerated from washing, stream are carried out using 0.1mol/L HCl solution Cadmium ion desorption reaction, 30~60min of time, regeneration tail occur in HCl solution for speed 0.5~1mL/min, adsorbent PEI/AC Cadmium ion containing high concentration in liquid, can be removed by the precipitation method.
The fixed bed continuous adsorption adsorption device by wastewater feed pump 1, recovering liquid feed pump 2, inlet valve 3, inlet valve 4, Inlet valve 5, inlet valve 6, fixed-bed adsorber 7, fixed-bed adsorber 8, outlet valve 9, outlet valve 10, outlet valve 11st, outlet valve 12 forms.
Pending waste water is connected by wastewater feed pump 1 and inlet valve 5,6 with fixed-bed adsorber 7,8.Recovering liquid passes through Feed pump 2 and inlet valve 3,4 connect with fixed-bed adsorber 7,8.
2. the processing method of a kind of waste water according to claim 1, it is characterised in that described method of wastewater treatment is solid Fixed bed continuously adsorbs, and adsorption process is as follows：
Described waste water when carrying out continuous Adsorption cadmium ion, open, go out first by inlet valve 3,6 closings, inlet valve 5 Mouth valve 10,11 is closed, and outlet valve 9 is opened.Waste water to be adsorbed is passed through in fixed-bed adsorber 7 by wastewater feed pump 1, is entered The continuous adsorption reaction of row, then flows out fixed-bed adsorber by outlet valve 9.Now valve 4,12 open, and HCl solution passes through Recovering liquid feed pump 2 enters in fixed-bed adsorber 8, carries out desorption reaction, and adsorbent is regenerated by washing, passes through valve The outflow regeneration tail washings of door 12.
After 60~100min, switching the mode of operation of fixed-bed adsorber 7,8, valve 4,5 is closed, and valve 3,6 is opened, valve 9, 12 are closed, and valve 10,11 is opened.Now fixed bed 7 carries out desorption manipulation, and fixed bed 8 carries out adsorption operations.
CN201710798972.3A 2017-09-07 2017-09-07 A kind of processing method of waste water Pending CN107337250A (en)

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CN114147052A (en) * 2020-09-05 2022-03-08 中国石油化工股份有限公司 High-boiling-point substance metal ion adsorption renewable system and process
CN114147052B (en) * 2020-09-05 2023-01-24 中国石油化工股份有限公司 High-boiling-point substance metal ion adsorption renewable system and process
CN114291934A (en) * 2022-01-05 2022-04-08 云南大学 Method for treating cadmium-containing wastewater by filling fixed bed with adsorbent prepared from kitchen waste oil

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Application publication date: 20171110