CN105776672B - A kind of energy-efficient waste water treatment process - Google Patents

A kind of energy-efficient waste water treatment process Download PDF

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CN105776672B
CN105776672B CN201610318610.5A CN201610318610A CN105776672B CN 105776672 B CN105776672 B CN 105776672B CN 201610318610 A CN201610318610 A CN 201610318610A CN 105776672 B CN105776672 B CN 105776672B
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waste water
treatment process
tank
energy
water treatment
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CN105776672A (en
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王文庆
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Qinhuangdao Baigong Iron And Steel Co ltd
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Qinhuangdao Baigong Iron And Steel Co Ltd
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • 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
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

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

Abstract

The invention discloses a kind of energy-efficient waste water treatment process, the following steps are included: then nitrogenous phosphate, which is added, first with plant based biomass heats up activation into charcoal, obtain modified active carbon, then pending water is injected into pre- ozone contact tank, then coagulating sedimentation is carried out, enter back into sand filter filtering, filtrate enters main ozone contact tank, subsequently into biological activated carbon pond, active carbon obtained is added in biological activated carbon pond, adsorption treatment 2-3h, subsequently into conditioning tank, and coagulant is added in conditioning tank, pass through pneumatic stirring, it is sufficiently mixed coagulant with waste water, finally by inclined-tube sedimentation tank, solid-liquid ingredient in waste water is separated, the water chlorination separated, reach discharge standard.Waste water treatment process disclosed by the invention, at low cost, high-efficient, environmental protection and energy saving.

Description

A kind of energy-efficient waste water treatment process
Technical field:
The present invention relates to water-treatment technology fields, are specifically related to a kind of energy-efficient waste water treatment process.
Background technique:
Active carbon has stronger adsorptivity and a catalytic performance as a kind of environmentally friendly adsorbent, raw material it is sufficient and It is highly-safe, the advantages that acid and alkali-resistance, heat-resisting, not soluble in water and organic solvent, Yi Zaisheng, such as to the organic pollutant dissolved in water Benzene-like compounds, phenolic compound, petroleum and oil product etc. have stronger adsorption capacity, and to bioanalysis and other Chemical method is difficult to the organic pollutant removed, such as coloration, methylene blue surface reactive material, herbicide, insecticide, synthetic dyestuffs And many artificial synthesized organic compounds have preferable removal effect；In addition, active carbon is to electroplating wastewater and metallurgy industry Heavy metal in waste water also has stronger adsorption capacity；There is apparent clarification to water turbidity, can remove different in water Smelly, peculiar smell also has fabulous filtration to bacterium.Therefore, active carbon is increasingly taken seriously in water process.But by In normal activated carbon, there are ash content height, Kong Rong little, micropores to be distributed the features such as wide, specific surface area is small and adsorptive selectivity can be poor, In addition some limitations of its surface functional group and electrochemical properties, keep it limited to the Adsorption effect of pollutant, far from It is able to satisfy the requirement of domestic and international market.Therefore, it is necessary to be modified to its structure and property, to increase its adsorption capacity, delay Solve water pollution pressure.And presently, there are water treatment technology short time consumption it is long, it is at high cost, and efficiency is relatively low,.
Summary of the invention:
The object of the present invention is to provide a kind of energy-efficient waste water treatment process, and the technological operation is simple, at low cost, and locate Adsorbent during reason is prepared by discarded plant based biomass, is not only contributed to environmental protection, is also substantially reduced Production cost, and the activated carbon adsorption amount is big, waste water treatment efficiency is high.
To achieve the above object, the invention adopts the following technical scheme:
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 100-120 parts of plant base biomass are crushed, 5-180 parts of nitrogenous phosphate is added, stirred 12-48h, mixed Close material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating of 10-15 DEG C/min Speed is warming up to 550-650 DEG C, keeps constant temperature 30-50min, then with the heating rate of 18-20 DEG C/min, be brought rapidly up to 800-900 DEG C, constant temperature 1-2h is kept, activates into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in true In empty drying box, dries at 100-120 DEG C to constant weight, obtain active carbon；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, subsequently into biological activated carbon pond, activity made from step (1) is added in biological activated carbon pond Subsequently into conditioning tank, and coagulant is added in charcoal, adsorption treatment 2-3h in conditioning tank, by pneumatic stirring, makes coagulation Agent is sufficiently mixed with waste water, and finally by inclined-tube sedimentation tank, the solid-liquid ingredient in waste water is separated, the water chlorination separated Disinfection, that is, reach discharge standard.
As a preferred embodiment of the above technical solution, in step 1), the plant based biomass is sawdust, bamboo scraps, stalk, corn One of core, walnut shell, bagasse, vinasse or a variety of mixing.
As a preferred embodiment of the above technical solution, in step 1), the nitrogenous phosphate is melamine phosphate, melamine One of amine Quadrafos, ammonium phosphate, ammonium polyphosphate or a variety of mixing.
As a preferred embodiment of the above technical solution, in step (2), main ozone input amount is 1.0-2.0mg/L.
As a preferred embodiment of the above technical solution, in step (2), the biological activated carbon filter is reprint filter tank, and filtering velocity is 12-15m/h, active carbon layer is with a thickness of 2-3m.
As a preferred embodiment of the above technical solution, in step (2), the coagulant is aluminium polychloride, polyacrylamide The mixture of amine, the two mass ratio are 1:1.5-2.
As a preferred embodiment of the above technical solution, in step (2), discontinuity that the pneumatic stirring is controlled using PLC Aeration stirrer.
As a preferred embodiment of the above technical solution, in step (2), the inclined-tube sedimentation tank is using polyvinyl chloride material bee Nest shape inclined tube, inclination angle are 60-70 DEG C, plagioclase 1-1.2m.
Compared with prior art, the invention has the following advantages that
(1) present invention prepares active carbon as adsorbent using plant base biological agent, the plant based biomass used Degradation temperature matches with nitrogenous phosphate, and biomass can efficiently use the phosphorus that nitrogenous phosphate generates during degradation Acid and nitrogenous gas, greatly reduce the dosage of activator, to reduce cost of water treatment；
(2) the nitrogenous phosphate that the present invention uses can generate amine or nitrogenous heterocyclic active group in activated carbon surface Group, to substantially increase the activity and adsorption rate of active carbon；
(3) present invention rationally controls the dosage of active carbon and coagulant, and controls waste water treatment process condition, makes Waste water treatment efficiency height is obtained, the organic pollutant removal rate in waste water is high, and processing cost is low.
Specific embodiment:
In order to better understand the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solving The present invention is released, any restriction will not be constituted to the present invention.
Embodiment 1
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 100 parts of sawdusts are crushed, 5 parts of melamine phosphates is added, stirred 12h, obtain mixed material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 10 DEG C/min 550 DEG C are warming up to, constant temperature 30min is kept to be brought rapidly up then with the heating rate of 18 DEG C/min to 800 DEG C, keeps constant temperature 1h is activated into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in a vacuum drying oven, and is done at 100 DEG C It is dry to constant weight, obtain active carbon；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, main ozone input amount is 1.0mg/L, subsequently into biological activated carbon pond, filtering velocity 12m/h, activity Carbon layer is 2m, adsorption treatment 2h, subsequently into conditioning tank, and be added in conditioning tank 1 part of aluminium polychloride, 1.5 parts it is poly- Acrylamide is sufficiently mixed coagulant with waste water by pneumatic stirring, the solid-liquid finally by inclined-tube sedimentation tank, in waste water Ingredient is separated, the water chlorination separated reaches discharge standard.
Embodiment 2
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 120 parts of bamboo scraps are crushed, 180 parts of melamine phosphates is added, stirred 48h, obtain mixed material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 15 DEG C/min 650 DEG C are warming up to, constant temperature 50min is kept to be brought rapidly up then with the heating rate of 20 DEG C/min to 900 DEG C, keeps constant temperature 2h is activated into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in a vacuum drying oven, and is done at 120 DEG C It is dry to constant weight, obtain active carbon；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, main ozone input amount is 2.0mg/L, subsequently into biological activated carbon pond, filtering velocity 15m/h, activity Carbon layer is 3m, adsorption treatment 3h, subsequently into conditioning tank, and 2 parts of aluminium polychlorides, 4 parts poly- third is added in conditioning tank Acrylamide is sufficiently mixed coagulant with waste water by pneumatic stirring, finally by inclined-tube sedimentation tank, solid-liquid in waste water at Divide and separated, the water chlorination separated reaches discharge standard.
Embodiment 3
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 105 parts of stalks are crushed, 35 parts of melamine polyphosphates is added, stirred 16h, obtain mixed material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 11 DEG C/min 550 DEG C are warming up to, constant temperature 35min is kept to be brought rapidly up then with the heating rate of 19 DEG C/min to 800 DEG C, keeps constant temperature 1.2h is activated into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in a vacuum drying oven, at 105 DEG C Drying obtains active carbon to constant weight；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, main ozone input amount is 1.2mg/L, subsequently into biological activated carbon pond, filtering velocity 13m/h, activity Carbon layer is 2.2m, adsorption treatment 2.2h, subsequently into conditioning tank, and 1.2 parts of aluminium polychlorides, 2 is added in conditioning tank Part polyacrylamide is sufficiently mixed coagulant with waste water by pneumatic stirring, finally by inclined-tube sedimentation tank, in waste water Solid-liquid ingredient is separated, the water chlorination separated reaches discharge standard.
Embodiment 4
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 110 parts of sawdusts, bamboo scraps, stalk, corncob, walnut shell, bagasse, vinasse are crushed, 75 parts of melamines is added Amine phosphate, melamine polyphosphate, ammonium phosphate, ammonium polyphosphate stir 20h, obtain mixed material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 12 DEG C/min 580 DEG C are warming up to, constant temperature 40min is kept to be brought rapidly up then with the heating rate of 20 DEG C/min to 850 DEG C, keeps constant temperature 1.4h is activated into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in a vacuum drying oven, at 110 DEG C Drying obtains active carbon to constant weight；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, main ozone input amount is 1.4mg/L, subsequently into biological activated carbon pond, filtering velocity 14m/h, activity Carbon layer is 2.4m, adsorption treatment 2.4h, subsequently into conditioning tank, and in conditioning tank be added 1.4 parts of aluminium polychlorides, 2.5 parts of polyacrylamides are sufficiently mixed coagulant with waste water by pneumatic stirring, finally by inclined-tube sedimentation tank, in waste water Solid-liquid ingredient separated, the water chlorination separated reaches discharge standard.
Embodiment 5
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 115 parts of sawdusts, bamboo scraps, stalk, corncob, walnut shell, bagasse, vinasse are crushed, 115 parts of melamines is added Amine phosphate, melamine polyphosphate, ammonium phosphate, ammonium polyphosphate stir 27h, obtain mixed material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 13 DEG C/min 600 DEG C are warming up to, constant temperature 45min is kept to be brought rapidly up then with the heating rate of 18 DEG C/min to 900 DEG C, keeps constant temperature 1.6h is activated into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in a vacuum drying oven, at 115 DEG C Drying obtains active carbon to constant weight；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, main ozone input amount is 1.6mg/L, subsequently into biological activated carbon pond, filtering velocity 14m/h, activity Carbon layer is 2.6m, adsorption treatment 2.6h, subsequently into conditioning tank, and 1.6 parts of aluminium polychlorides, 3 is added in conditioning tank Part polyacrylamide is sufficiently mixed coagulant with waste water by pneumatic stirring, finally by inclined-tube sedimentation tank, in waste water Solid-liquid ingredient is separated, the water chlorination separated reaches discharge standard.
Embodiment 6
A kind of energy-efficient waste water treatment process, comprising the following steps:
(1) preparation of adsorbent:
1) 120 parts of sawdusts, bamboo scraps, stalk, corncob, walnut shell, bagasse, vinasse are crushed, 145 parts of melamines is added Amine phosphate, melamine polyphosphate, ammonium phosphate, ammonium polyphosphate stir 35h, obtain mixed material；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 14 DEG C/min 630 DEG C are warming up to, constant temperature 50min is kept to be brought rapidly up then with the heating rate of 19 DEG C/min to 850 DEG C, keeps constant temperature 1.8h is activated into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, is placed in a vacuum drying oven, at 120 DEG C Drying obtains active carbon to constant weight；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate Into main ozone contact tank, main ozone input amount is 1.8mg/L, subsequently into biological activated carbon pond, filtering velocity 15m/h, activity Carbon layer is 2.8m, adsorption treatment 2.8h, subsequently into conditioning tank, and in conditioning tank be added 1.8 parts of aluminium polychlorides, 3.5 part polyacrylamide is sufficiently mixed coagulant with waste water by pneumatic stirring, finally by inclined-tube sedimentation tank, in waste water Solid-liquid ingredient separated, the water chlorination separated reaches discharge standard.

Claims (6)

1. a kind of energy-efficient waste water treatment process, which comprises the following steps:
(1) preparation of adsorbent:
1) 100-120 parts of plant base biomass are crushed, 5-180 parts of nitrogenous phosphate is added, stirred 12-48h, obtain mixture Material；Wherein, the nitrogenous phosphate is one of melamine phosphate, melamine polyphosphate, ammonium polyphosphate or more Kind mixing；
2) mixed material for obtaining step 1) is placed in tube furnace under nitrogen protection, with the heating rate of 10-15 DEG C/min It is warming up to 550-650 DEG C, constant temperature 30-50min is kept to be brought rapidly up then with the heating rate of 18-20 DEG C/min to 800- 900 DEG C, constant temperature 1-2h is kept, activates into charcoal, obtained sample is washed with deionized to filtrate and is in neutrality, it is dry to be placed in vacuum In dry case, dries at 100-120 DEG C to constant weight, obtain active carbon；
(2) pending water is injected into pre- ozone contact tank, then carries out coagulating sedimentation, enter back into sand filter filtering, filtrate enters Active carbon made from step (1) is added subsequently into biological activated carbon pond in main ozone contact tank in biological activated carbon pond, inhales Attached processing 2-3h, subsequently into conditioning tank, and is added coagulant in conditioning tank, by pneumatic stirring, make coagulant with Waste water is sufficiently mixed, and finally by inclined-tube sedimentation tank, the solid-liquid ingredient in waste water is separated, the water chlorination separated, Reach discharge standard；Wherein, the biological activated carbon pond be reprint filter tank, filtering velocity 12-15m/h, active carbon layer with a thickness of 2-3m。
2. a kind of energy-efficient waste water treatment process as described in claim 1, which is characterized in that in step 1), the plant Based biomass is one of sawdust, bamboo scraps, stalk, corncob, walnut shell, bagasse, vinasse or a variety of mixing.
3. a kind of energy-efficient waste water treatment process as described in claim 1, which is characterized in that in step (2), main ozone is thrown Entering amount is 1.0-2.0mg/L.
4. a kind of energy-efficient waste water treatment process as described in claim 1, which is characterized in that described efficient in step (2) Coagulant is the mixture of aluminium polychloride, polyacrylamide, and the two mass ratio is 1:1.5-2.
5. a kind of energy-efficient waste water treatment process as described in claim 1, which is characterized in that described pneumatic in step (2) Stir the discontinuity aeration stirrer controlled using PLC.
6. a kind of energy-efficient waste water treatment process as described in claim 1, which is characterized in that in step (2), the inclined tube Sedimentation basin is using polyvinyl chloride material alveolate leaning pipe, and inclination angle is 60-70 DEG C, plagioclase 1-1.2m.
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CN106006795B (en) * 2016-07-25 2019-04-09 南京德润环保科技有限公司 A kind of waste water treating agent of bagasse bentonite Composite type kaolin
CN106365278A (en) * 2016-08-31 2017-02-01 北京理工水环境科学研究院有限公司 Water body heavy metal removal technique
CN110339812A (en) * 2019-07-09 2019-10-18 四川大学 Modification biological charcoal and its application in absorption VOCs

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