CN108862849A - The treatment process and processing system of Almond debitterizing wastewater - Google Patents

The treatment process and processing system of Almond debitterizing wastewater Download PDF

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Publication number
CN108862849A
CN108862849A CN201810718215.5A CN201810718215A CN108862849A CN 108862849 A CN108862849 A CN 108862849A CN 201810718215 A CN201810718215 A CN 201810718215A CN 108862849 A CN108862849 A CN 108862849A
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treatment
wastewater
aerobic
almond
processing
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吴举
陈强
冉光阳
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Qinhuangdao Green Environmental Engineering Co Ltd
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Qinhuangdao Green Environmental Engineering Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/20Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2846Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes

Abstract

The invention discloses a kind for the treatment of process of Almond debitterizing wastewater, decyanation unit removing hydrogen cyanide is first passed through using by Almond debitterizing wastewater to be processed, water outlet is then in air-floating apparatus through flocculation treatment, it enters back into UASB reactor and carries out anaerobic reaction, enter biological reaction pool group later and carries out biodegrade, finally through filter element, the water outlet for meeting urban wastewater treatment firm pollutant emission standard is obtained.The Almond debitterizing wastewater treatment process of acquisition, further combined with the use of processing system, it completes to Almond debitterizing wastewater pollutant efficiently to administer, improve waste water quality after administering, guarantee stable water outlet, so that water outlet is met urban wastewater treatment firm pollutant emission standard, is the Almond debitterizing wastewater treatment process with significant economical and environmentally friendly meaning.

Description

The treatment process and processing system of Almond debitterizing wastewater
Technical field
The present invention relates to Almond debitterizing wastewater processing technology field more particularly to a kind of processing works of Almond debitterizing wastewater The processing system that skill and the treatment process use.
Background technique
Almond contains about 50% fat oil and flavonoids abundant, polyphenols, and energy is relieving cough and asthma, moistens skin makeup, The initiation potential of heart disease, a variety of chronic diseases, pre- preventing tumor, therefore nutritive value with higher and medicinal valence can also be reduced Value.Due to also containing about 4% amygdalin, effect of the amygdalin in the emulsin and prunase coexisted with it in almond Under can decompose and generate benzaldehyde and hydrogen cyanide, and hydrogen cyanide belongs to extremely toxic substance, therefore almond becomes all kinds of in deep processing De- suffering reason is had to pass through before food.It is soluble in boiling water in view of amygdalin, industrially generallys use the mode of thermophilic digestion De- hardship, the process are also accompanied by the dissolution of a large amount of protein, fat, carbohydrate simultaneously, to generate a large amount of toxic highly concentrated Organic wastewater is spent, this kind of waste water directly endangers water source and surrounding enviroment, so strictly to be handled before discharge, but application at present More mature sewage treatment process is all difficult to reach discharge standard for the processing of Almond debitterizing wastewater.
Summary of the invention
To solve the shortcomings of the prior art, the present invention provides a kind for the treatment of process of Almond debitterizing wastewater, the works Skill breaks conventional treatment method, by organically combining materialization decyanation processing and biochemical treatment, realizes useless to bitterness from almond The stably reaching standard of this kind of toxic high concentrated organic wastewater of water is handled.
To achieve the above object, the treatment process of Almond debitterizing wastewater provided by the invention is to take off almond to be processed Bitter waste water is first passed through decyanation unit removing hydrogen cyanide, and water outlet enters back into UASB reaction then in air-floating apparatus through flocculation treatment Device carries out anaerobic reaction, enters biological reaction pool group later and carries out biodegrade, finally through filter element, obtains meeting cities and towns dirt The water outlet of water treatment plant's pollutant emission standard;
The dehydrogenation unit removes the Almond debitterizing wastewater after adjusting pH via alkali using the method for aeration stripping The processing of toxicant hydrogen cyanide;
Biodegrade processing in the biological reaction pool group includes the hydrolysis successively carried out, precipitates, aerobic, precipitating, with And enhanced hydrolysis, precipitating, strengthen aerobic, sedimentation treatment step.
Treatment process of the invention, for a large amount of organic pollutants and extremely toxic substance hydrogen cyanogen contained in Almond debitterizing wastewater The intractability of acid, breaks conventional treatment method, uses elder generation to eliminate in the method that alkali adjusts waste water and then passes through aeration stripping useless The toxic pollutant hydrogen cyanide of water, on the basis of removing the property the killed influence that wastewater toxicity handle subsequent biochemical, then via The flocculated mode of air bearing removes the suspended matters such as the fat oil in waste water again, and plays the rank combined with subsequent UASB anaerobism simultaneously Effect is connect, so that materialization decyanation processing and biochemical treatment is reached combination, avoids mutual adverse effect, give full play to difference The respective effect of processing method reaches synergistic treatment effect;Finally by by hydrolyzing, aerobic, enhanced hydrolysis, strengthening The array of biochemical facture that oxygen is constituted completes the efficient improvement to Almond debitterizing wastewater pollutant, and water outlet is made to meet town sewage Treatment plant's pollutant emission standard.In addition, in array of biochemical facture, cooperate precipitating after the hydrolysis of progress, it is aerobic after precipitating, Aerobic rear precipitating is precipitated and strengthened after enhanced hydrolysis, waste water quality after improvement can be very significantly improved, be guaranteed water outlet Stability.
As the restriction to above-mentioned technical proposal, the treatment process of the Almond debitterizing wastewater includes the following steps:
A, hydrogen cyanide is removed:Almond debitterizing wastewater pH to be processed is first adjusted to 7~8 using calcium hydroxide, is then led to Enter decyanation unit, in 2~5L/m2Aeration stripping processing is carried out to waste water under the aeration condition of s, the gas that stripping is come out is received UV emission-control equipment is delivered to after collection;
B, air bearing is flocculated:The water outlet of decyanation unit enters air-floating apparatus, and 3~10% coagulations are then added into air-floating apparatus Agent, 0.3~0.8 ‰ flocculants remove the suspended matter in waste water by flocculation reaction;
C, UASB reacts:The waste water being discharged from air-floating apparatus enters UASB reactor through water pump lifting, in reactor volume 2~4kg/ of load (m3D) under the conditions of, the Anaerobic Treatment to waste water is completed;
D, biodegrade:Waste water after UASB reactor for treatment enters biological reaction pool group, is successively hydrolyzed, sinks It forms sediment, aerobic, precipitating and enhanced hydrolysis, precipitating strengthen the processing step of aerobic precipitating;
In the hydrolysis, sedimentation treatment step, hydrolyzing sludge amount is maintained at 3~5g/L, and the hydrolysis residence time 8~12 is small When, the sedimentation time 3~5 hours, there are sludge reflux, reflux ratios 1 between precipitating and hydrolysis:(0.5~1.5);
In the aerobic, sedimentation treatment step, aerobic sludge amount is maintained at 3~5g/L, the gas-water ratio of aerobic aeration (40~ 200):1,28~36 hours aerobic residence times, the sedimentation time 3~5 hours, there are sludge reflux, reflux between precipitating and being aerobic Than being 1:(0.5~1.5);
In the enhanced hydrolysis, sedimentation treatment step, enhanced hydrolysis sludge quantity is maintained at 2~4g/L, and enhanced hydrolysis stops Time 4~8 hours, the sedimentation time 3~5 hours, precipitating enhanced hydrolysis between there are sludge reflux, reflux ratio be (0.5~ 1.5);
It is described to strengthen in aerobic, sedimentation treatment step, strengthen aerobic sludge amount and be maintained at 2~4g/L, strengthens aerobic aeration Gas-water ratio (20~80):1, strengthen 15~20 hours aerobic residence times, the sedimentation time 3~5 hours, precipitating and reinforcing are aerobic Between there are sludge reflux, reflux ratios 1:(0.5~1.5);
E, filtering, discharge:Through step d biodegrade treated waste water, then it is single by filtering with the flow velocity of 10~15m/s Member obtains the water outlet for meeting urban wastewater treatment firm pollutant emission standard.
The operating parameter and other factors that processing mode is respectively walked in treatment process are further limited, to improve to bitterness from almond While waste water stablizes processing, optimization processing effect;Wherein in biodegradable processing step, by being arranged in each precipitating link Sludge reflux operation, both ensure that the sludge quantity in each biological reaction pool, stable biodegradable effect, and effectively prevent activity Sludge enters junior's reaction tank, avoids microorganism growth from being suppressed even dead, the high bioactivity of sludge is kept, thus excellent Change outlet effect.
As the restriction to above-mentioned technical proposal, pre-treatment step is additionally provided with before step a, i.e., by apricot to be processed The de- bitter waste water of benevolence first carries out grid and intercepts filtering, then carries out removing hydrogen cyanide and subsequent processing steps.
As the restriction to above-mentioned technical proposal, following operation, i.e., the waste water being discharged from air-floating apparatus are added in step c It is first lifted into prehydrolysis acidification pool through water pump, enters promotion pond after carrying out prehydrolysis processing to waste water, is controlled being promoted in pond 30~40 DEG C of waste water temperature, it is then promoted to UASB reactor again.
As the restriction to above-mentioned technical proposal, coagulant described in step b selects the polymerization chlorine of 0.01~0.05mg/ml Change aluminium, the flocculant selects the polyacrylamide of 0.02~0.05mg/ml.
As the restriction to above-mentioned technical proposal, in UASB reactor described in step c inlet flow-patterm control 6.5~7.5, Water temperature is controlled at 33~38 DEG C.
Pretreatment process is added in treatment process, and hydrolysis acidification and water temperature control behaviour are added before entering UASB reactor Make, limits the operations ginseng such as water inlet requirement of coagulant, flocculant type and UASB reactor that air bearing flocculation step is selected Number guarantees waste water stable operation, and is conducive to intensive treatment effect.
Meanwhile the present invention also provides a kind of processing systems of Almond debitterizing wastewater, including successively go here and there from upstream to downstream Aerating regulation pond, decyanization reaction device, air-floating apparatus, water pump, UASB reactor, biological reaction pool group and the filter device of connection; The biological reaction pool group includes the one-stage hydrolysis pool being sequentially connected in series, first stage precipitation tank, level-one aerobic tank, second-level settling pond, and two Grade hydrolytic tank, three-level sedimentation basin, with second level aerobic tank, level Four sedimentation basin;Between the first stage precipitation tank and one-stage hydrolysis pool, second level Distinguish between sedimentation basin and level-one aerobic tank, between three-level sedimentation basin and second level hydrolytic tank, between level Four sedimentation basin and second level aerobic tank Equipped with independent sludge refluxing apparatus.
Each hydrolysis, Aerobic biological process unit are equipped with individual sludge recirculation system, guarantee wastewater sludge content, together When avoid entering because of anaerobic sludge aerobic tank etc. and bring impact to waste water and sludge, guarantee sludge settling effect and to return mud uniform.
As the restriction to above-mentioned technical proposal, pretreatment pool is set in aerating regulation pond upstream.
As the restriction to above-mentioned technical proposal, the aerating regulation pond is set to underground, the decyanization reaction device packet Include the decyanation pond for being equipped with gas collecting apparatus and being totally-enclosed pond body;The air-floating apparatus is using appearance gas air-flotation type;The filter element Including at least one of more medium filter, active carbon filter.
As the restriction to above-mentioned technical proposal, filler and diving mixing device are respectively equipped in hydrolytic tanks at different levels;Respectively Filler and aerator are respectively equipped in grade aerobic tank;Sedimentation basins at different levels are all made of flat flow mudpan, and in sludge Scraping and sucking machine is additionally provided in sedimentation basin.
For convenient for the stable operation of Almond debitterizing wastewater processing, the present invention also provides more applicable processing systems, go forward side by side One step limits each processing unit device, to obtain the stabilization to Almond debitterizing wastewater, thoroughly administer, has significant economy and ring Protect meaning.
In conclusion using technical solution of the present invention, the Almond debitterizing wastewater treatment process of acquisition breaks conventional treatment The toxic pollutant hydrogen cyanide of method, the Almond debitterizing wastewater for using elder generation that will modulate alkalinity with aeration stripping method removes, then via The flocculated mode of air bearing is connected subsequent UASB anaerobism, finally by by hydrolysis, aerobic, enhanced hydrolysis, strengthen it is aerobic constitute be Column biochemical treatment process, and sink after precipitating, aerobic rear precipitating, enhanced hydrolysis after each biodegradable link cooperation is hydrolyzed It forms sediment and strengthens aerobic rear precipitating, complete to Almond debitterizing wastewater pollutant efficiently to administer, waste water quality after improvement is administered, Guarantee stable water outlet, water outlet is made to meet urban wastewater treatment firm pollutant emission standard, is to have significantly economical and environmentally friendly to anticipate The Almond debitterizing wastewater treatment process of justice.The treatment process is carried out in applicable processing system, is realized to Almond debitterizing wastewater Stabilization, thoroughly administer.
Detailed description of the invention
Fig. 1 is the Almond debitterizing wastewater processing system schematic device that embodiment of the present invention is related to;
In figure:1, pretreatment pool;2, aerating regulation pond;3, dehydrogenation reaction device;4, air-floating apparatus;5, water pump;6,USAB Reactor;61, prehydrolysis acidification pool;62, pond is promoted;7, one-stage hydrolysis pool;8, first stage precipitation tank;9, level-one sludge reflux fills It sets;10, level-one aerobic tank;11, second-level settling pond;12, secondary sludge reflux unit;13, second level hydrolytic tank;14, three-level precipitates Pond;15, three-level sludge refluxing apparatus;16, second level aerobic tank;17, level Four sedimentation basin;18, level Four sludge refluxing apparatus;19, mistake Filter device.
Specific embodiment
Below in conjunction with embodiment, technical solution of the present invention is clearly and completely described, it is clear that described Embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field Those of ordinary skill's every other embodiment obtained without making creative work, belongs to protection of the present invention Range.
Embodiment one
The present embodiment is related to the treatment process to Almond debitterizing wastewater.
The treatment process can carry out in Almond debitterizing wastewater processing system as shown in Figure 1, and the processing system includes The aerating regulation pond 2 that is sequentially connected in series from upstream to downstream, decyanization reaction device 3, air-floating apparatus 4, water pump 5, UASB reactor 6, Biological reaction pool group and filter device 19;The biological reaction pool group includes the one-stage hydrolysis pool 7 being sequentially connected in series, level-one precipitating Pond 8, level-one aerobic tank 10, second-level settling pond 11, second level hydrolytic tank 13, three-level sedimentation basin 14 are heavy with second level aerobic tank 16, level Four Shallow lake pond 17;Level-one sludge refluxing apparatus 9, the level-one aerobic tank are provided between the one-stage hydrolysis pool 7 and first stage precipitation tank 8 Secondary sludge reflux unit 12 is equipped between 10 and second-level settling pond 11, between the second level hydrolytic tank 13 and three-level sedimentation basin 14 Equipped with three-level sludge refluxing apparatus 15, level Four sludge refluxing apparatus is equipped between the second level aerobic tank 16 and level Four sedimentation basin 17 18;
Wherein aerating regulation pond 2 is completely set up in underground, and decyanization reaction device 3 is equipped with gas collecting apparatus and is totally-enclosed pond The decyanation pond of body;Air-floating apparatus 3 is using appearance gas air-flotation type;Filter device 19 may include more medium filter and/or active carbon mistake Filter;
Filler and diving mixing device are respectively equipped in hydrolytic tanks at different levels;Be respectively equipped in aerobic tanks at different levels filler with Aerator;Sedimentation basins at different levels are all made of flat flow mudpan, and scraping and sucking machine is additionally provided in mudpan.
In addition, setting pretreatment pool 1 is connect with the water inlet in aerating regulation pond 2 in 2 upstream of aerating regulation pond, it is described pre- The concretely grid pond of processing pond 1;Prehydrolysis acidification pool 61 can be also added between water pump 5 and UASB reactor and promotes pond 62, being promoted, steam pipework and temperature control system are set in pond 62.
Embodiment 1.1
Almond debitterizing wastewater from Chengde Asia and Europe kernel Co., Ltd, COD 20000mg/L, BOD5For 8000mg/ L, SS 1800mg/L, waste water contain the organic pollutant of a large amount of cyanides (cyanide content is 30~75mg/L), high concentration Matter, ammonia nitrogen, suspended impurity etc. are handled the waste water using following technique;
Waste water can first pass through simple grid and intercept filtering, after removing the bulky grain pollutant in waste water, then successively carry out Following treatment process:
A, hydrogen cyanide is removed:Almond debitterizing wastewater pH to 8 is adjusted using calcium hydroxide, by Almond debitterizing wastewater to be processed With 300m3The flow of/d is passed through decyanation pond, is then 3L/m in aeration quantity2Aeration stripping processing is carried out to waste water under the conditions of s, The processing of UV emission-control equipment will be delivered to after the gas collection of stripping out;
The boiling point and room temperature of hydrogen cyanide are close, and hydrogen cyanide is a kind of volatile acid, and hydrogen cyanide is extremely unstable, easily occur anti- It answers:
HCN+H2O=HCOONH4=NH3+HCOOH
By being aerated to waste water containing hydrogen cyanide, hydrogen cyanide stripping is converted into ammonia and formic acid;
B, air bearing is flocculated:Decyanation pond is discharged with 15m3The flow of/h enters air-floating apparatus, then adds into air-floating apparatus The PAC of 5% (numerical value is mass percent, i.e. coagulant charging quantity accounts for the mass fraction of water) coagulant 0.01mg/ml, The PAM of 0.5 ‰ (numerical value is mass percent, i.e. flocculant dosage accounts for the mass fraction of water) flocculant 0.02mg/ml, Aeration stirring about 1 hour, the suspended matter in waste water is removed by flocculation reaction;
The air-floating apparatus of air-dissolving air-float can generate in water a large amount of micro air bubble by molten gas and release system, make it It is adhered in waste water on the solid or liquid particle close with water density, to remove fine suspension, and air-dissolving air-float water Power load is high, and place to go effect is good;
C, UASB reacts:The waste water being discharged from air-floating apparatus enters UASB reactor through water pump lifting, and control inlet flow-patterm exists 6.5~7.5, most preferably 6.8~7.2, inlet water temperature is at 35 DEG C or so, in reactor volume load 2.5kg/ (m3D) condition The lower Anaerobic Treatment completed to waste water;
D, biodegrade:Waste water after UASB reactor for treatment enters biological reaction pool group, is successively hydrolyzed, sinks It forms sediment, aerobic, precipitating and enhanced hydrolysis, precipitating strengthen the processing step of aerobic precipitating;
In the hydrolysis, sedimentation treatment step, sludge quantity is maintained at 3.5g/L or so in hydrolytic tank, and diving mixing device is strong Degree is in 10W/m3Left and right, hydrolysis stop 10 hours;Precipitating 4 hours in sedimentation basin, and controlling clarifier sludge reflux ratio is about 1: 1;
In the aerobic, sedimentation treatment step, sludge quantity is maintained at 3g/L, the gas-water ratio 45 of aerobic aeration in aerobic tank: 1, aerobic tank stop 36 hours, the sedimentation time 4 hours, and controlling clarifier sludge reflux ratio is about 1:1;
In the enhanced hydrolysis, sedimentation treatment step, sludge quantity is maintained at 2.5g/L or so in enhanced hydrolysis pond, and diving stirs Device intensity is mixed in 10W/m3Left and right, enhanced hydrolysis stop 6 hours;Precipitating 4 hours in sedimentation basin, and control clarifier sludge and return Stream is than about 1:1;
It is described to strengthen in aerobic, sedimentation treatment step, strengthen sludge quantity in aerobic tank and is maintained at 2.5g/L, aerobic aeration Gas-water ratio 25:1, reinforcing aerobic tank stop 20 hours, the sedimentation time 4 hours, and controlling clarifier sludge reflux ratio is about 1:1;;
E, filtering, discharge:Pass through multimedium, work through step d biodegrade treated waste water, then with the flow velocity of 15m/s Property charcoal filtering, after advanced treating, obtain the water outlet for meeting urban wastewater treatment firm pollutant emission standard.
The processing of waste water can carry out in full-automatic wastewater operating system, wherein in decyanation pond lye addition via pH from Dynamic detector controls caustic dosage, and the addition of flocculant, coagulant is added by automatic gauge pump in air-floating apparatus, and water pump is by automatic liquid Level controller controls start and stop, and each Aeration fan controls start and stop by PLC self controlled element, and UASB reactor inflow temperature is by temperature sensing Device controls water temperature etc., and for whole system in addition to manually making up a prescription, other can be fully automatic operation mode.
Embodiment 1.2
Almond debitterizing wastewater from the processing of Chengde semen armeniacae amarae, COD 12000mg/L, SS 3500mg/L, pollutant Waste water from cooking and pickling process waste water, predominantly high-enriched organics and cyanide (cyanide predominantly in process of manufacture Content is 30~75mg/L), processing difficulty is larger, is handled using following technique the waste water;
Waste water can first pass through simple grid and intercept filtering, and two-stage grid filtration (coarse rack, fine fack) removes in waste water Bulky grain pollutant after, then successively carry out the following processing process:
A, hydrogen cyanide is removed:By Almond debitterizing wastewater to be processed with 400m3The flow of/d is first passed through to full underground and is aerated Conditioning tank, water outlet is boosted to enter pH conditioning tank, adds alkali (calcium hydroxide) to adjust wastewater pH and reaches 7.5, water outlet gravity flow is passed through de- Cyanogen pond, then in aeration quantity 3L/m2Stripping is carried out to waste water under conditions of s and removes hydrogen cyanide, ammonia is blown out and formic acid, decyanation pond is Totally-enclosed pond body reserves exhaust pipe, and the gas that stripping goes out is led to waste gas pollution control and treatment facility via air-introduced machine and is further processed, and gives up Gas qualified discharge;
B, air bearing is flocculated:Decyanation unit is discharged through 20m3The water pump lifting of/h is sent to air-floating apparatus, then to air-floating apparatus Inside add 8% (numerical value is mass percent, i.e. coagulant charging quantity accounts for the mass fraction of water) coagulant 0.01mg/ml's PAC, 0.6 ‰ (numerical value is mass percent, i.e. flocculant dosage accounts for the mass fraction of water) flocculant 0.02mg/ml PAM aeration stirring about 40 minutes, removes the suspended matter in waste water by flocculation reaction;
C, UASB reacts:The waste water being discharged from air-floating apparatus enters prehydrolysis acidification pool through water pump lifting, dives under water and stirs in pond Mixing intensity is about 10W/m3, prehydrolysis processing is carried out to waste water, water outlet gravity flow, which enters, promotes pond, and waste water temperature is controlled in pond being promoted Then waste water is delivered to UASB reactor again, in UASB volumetric loading 3kg/ (m between 30~40 DEG C by degree3D) condition Under, control UASB reactor inlet COD concentration is 5000mg/L, and inlet flow-patterm is 6.5~7.5, completes the Anaerobic Treatment to waste water; Measurement pH value of waste water is needed in USAB reactor, if inlet flow-patterm is less than 6.5, is then added sodium bicarbonate to prehydrolysis acidification pool and is adjusted pH;
D, biodegrade:Waste water after UASB reactor for treatment enters biological reaction pool group, is successively hydrolyzed, sinks It forms sediment, aerobic, precipitating and enhanced hydrolysis, precipitating strengthen the processing step of aerobic precipitating;
In the hydrolysis, sedimentation treatment step, sludge quantity is maintained at 3.5g/L or so in hydrolytic tank, and diving mixing device is strong Degree is in 10W/m3Left and right, hydrolysis stop 8 hours;Precipitating 3.5 hours in sedimentation basin, and controlling clarifier sludge reflux ratio is about 1: 1.2;
In the aerobic, sedimentation treatment step, sludge quantity is maintained at 3.5g/L, the gas-water ratio of aerobic aeration in aerobic tank 40:1, aerobic tank stop 28 hours, the sedimentation time 3.5 hours, and controlling clarifier sludge reflux ratio is about 1:1.2;
In the enhanced hydrolysis, sedimentation treatment step, sludge quantity is maintained at 2g/L or so, submersible agitating in enhanced hydrolysis pond Device intensity is in 10W/m3Left and right, enhanced hydrolysis stop 4 hours;Precipitating 3.5 hours in sedimentation basin, and control clarifier sludge and return Stream is than about 1:1.2;
It is described to strengthen in aerobic, sedimentation treatment step, strengthen sludge quantity in aerobic tank and is maintained at 2g/L, the gas of aerobic aeration Water is than 20:1, reinforcing aerobic tank stop 15 hours, the sedimentation time 3.5 hours, and controlling clarifier sludge reflux ratio is about 1: 1.2;
E, filtering, discharge:Pass through multimedium, work through step d biodegrade treated waste water, then with the flow velocity of 15m/s Property charcoal filtering, the water outlet for meeting urban wastewater treatment firm pollutant emission standard is obtained after advanced treating.
Comparative example 1
It is for the common processing method of Almond debitterizing wastewater at present:Neutralization+anaerobism+aerobic contact oxidation+aerobic reinforcing+ Aerobic precipitating+advanced treatment process+qualified discharge (various processes are successively carried out by above-mentioned statement sequence), because waste water is not to cyanogen Compound processing, cyanide have fatal toxicity for microorganism, cause to impact to biosystem, most probably cause Spawn incubation tired Difficulty, water outlet are difficult to stably reaching standard.
Comparative example 2
At present for cyanide wastewater processing, conventional process is:1, (adjust wastewater pH is 2~3 to acid adding decyanation method, and aeration is blown Remove hydrogen cyanide);2, plus alkali chlorination handles and (waste water is adjusted to alkalinity, hypochlorite oxidation Cyanide in Waste Water root is added);3. dioxygen Water oxidation (adjusts waste water to alkalinity, hydrogen peroxide oxidation is added as catalyst using copper ion and decomposes cyanogen root).
Soda acid is frequently added in above several decyanation methods first, increases operating cost and increases waste water salt content, is secondly added Oxidant:Sodium hypochlorite, hydrogen peroxide etc., all have bactericidal effect, administer to subsequent bio and increase difficulty.It is not necessarily in this technique Soda acid is frequently added, ensures that subsequent bio improvement can stable operation while saving operating cost.
At present in common Processing tecchnics, biological treatment is frequently with anaerobism+aerobic+sedimentation processing technology, because of anaerobic pond Interior anaerobic bacteria need to survive under anaerobism or anaerobic condition, be directly entered aerobic tank, first anaerobism as do not set sedimentation basin after anaerobic pond Bacterium can bring impact to aerobe in aerobic tank, influence aerobic tank treatment effect, and secondly anaerobe is lost, and not can guarantee Anaerobic pond sludge concentration.
And in treatment process of the invention anaerobism, it is aerobic be equipped with mudpan, anaerobic-aerobic system is individual Closed cycle guarantees microbe survival environment and concentration, to guarantee sewage outlet effect stably reaching standard.
In conclusion Almond debitterizing wastewater treatment process of the invention, uses elder generation that will modulate alkalinity with aeration stripping method The toxic pollutant hydrogen cyanide of Almond debitterizing wastewater removes, then is connected subsequent UASB anaerobism via the flocculated mode of air bearing, finally By the way that by hydrolyzing, precipitating, aerobic, precipitating, enhanced hydrolysis, precipitating strengthen the array of biochemical facture that aerobic, precipitating is constituted, complete It efficiently administers to pairs of Almond debitterizing wastewater pollutant, improves waste water quality after administering, guarantee stable water outlet, meet water outlet Urban wastewater treatment firm pollutant emission standard.

Claims (10)

1. a kind for the treatment of process of Almond debitterizing wastewater, it is characterised in that:The treatment process is that bitterness from almond to be processed gives up Water is first passed through decyanation unit removing hydrogen cyanide, water outlet then in air-floating apparatus through flocculation treatment, enter back into UASB reactor into Row anaerobic reaction enters biological reaction pool group later and carries out biodegrade, finally through filter element, obtains meeting at town sewage Manage the water outlet of factory's pollutant emission standard;
The dehydrogenation unit carries out removing toxicity to the Almond debitterizing wastewater after adjusting pH via alkali using the method for aeration stripping The processing of substance hydrogen cyanide;
Biodegrade processing in the biological reaction pool group includes the hydrolysis successively carried out, precipitating, aerobic, precipitating, Yi Jiqiang Change hydrolysis, precipitating, strengthens aerobic, sedimentation treatment step.
2. the treatment process of Almond debitterizing wastewater according to claim 1, it is characterised in that:The treatment process includes following Step:
A, hydrogen cyanide is removed:Almond debitterizing wastewater pH to be processed is first adjusted to 7~8 using calcium hydroxide, is then passed to de- Cyanogen unit, in 2~5L/m2Aeration stripping processing is carried out to waste water under the aeration condition of s, after the gas collection that stripping is come out It is delivered to UV emission-control equipment;
B, air bearing is flocculated:The water outlet of decyanation unit enters air-floating apparatus, and 3~10% coagulant, 0.3 are then added into air-floating apparatus ~0.8 ‰ flocculant removes the suspended matter in waste water by flocculation reaction;
C, UASB reacts:The waste water being discharged from air-floating apparatus enters UASB reactor through water pump lifting, in reactor volume load 2 ~4kg/ (m3D) under the conditions of, the Anaerobic Treatment to waste water is completed;
D, biodegrade:Waste water after UASB reactor for treatment enters biological reaction pool group, is successively hydrolyzed, precipitates, good Oxygen, precipitating and enhanced hydrolysis, precipitating strengthen the processing step of aerobic precipitating;
In the hydrolysis, sedimentation treatment step, hydrolyzing sludge amount is maintained at 3~5g/L, hydrolyzes the residence time 8~12 hours, sinks It forms sediment the time 3~5 hours, there are sludge reflux, reflux ratios 1 between precipitating and hydrolysis:(0.5~1.5);
In the aerobic, sedimentation treatment step, aerobic sludge amount is maintained at 3~5g/L, the gas-water ratio of aerobic aeration (40~ 200):1,28~36 hours aerobic residence times, the sedimentation time 3~5 hours, there are sludge reflux, reflux between precipitating and being aerobic Than being 1:(0.5~1.5);
In the enhanced hydrolysis, sedimentation treatment step, enhanced hydrolysis sludge quantity is maintained at 2~4g/L, enhanced hydrolysis residence time 4 ~8 hours, the sedimentation time 3~5 hours, there are sludge reflux between precipitating and enhanced hydrolysis, reflux ratio was (0.5~1.5);
It is described to strengthen in aerobic, sedimentation treatment step, strengthen aerobic sludge amount and be maintained at 2~4g/L, strengthens the gas of aerobic aeration Water ratio (20~80):1, strengthen 15~20 hours aerobic residence times, the sedimentation time 3~5 hours, precipitate and strengthen it is aerobic between deposit In sludge reflux, reflux ratio 1:(0.5~1.5);
E, filtering, discharge:Pass through filter element through step d biodegrade treated waste water, then with the flow velocity of 10~15m/s, Obtain the water outlet for meeting urban wastewater treatment firm pollutant emission standard.
3. the treatment process of Almond debitterizing wastewater according to claim 2, it is characterised in that:It is also set up before step a Have pre-treatment step, i.e., Almond debitterizing wastewater to be processed is first carried out grid intercept filtering, then carry out removing hydrogen cyanide and after Continuous processing step.
4. the treatment process of Almond debitterizing wastewater according to claim 2, it is characterised in that:Coagulant described in step b The aluminium polychloride of 0.01~0.05mg/ml is selected, the flocculant selects the polyacrylamide of 0.02~0.05mg/ml.
5. the treatment process of Almond debitterizing wastewater according to claim 2, it is characterised in that:It is added in step c following Operation is first lifted into prehydrolysis acidification pool through water pump from the waste water that air-floating apparatus is discharged, carry out prehydrolysis processing to waste water Enter afterwards and promote pond, controls 30~40 DEG C of waste water temperature in pond being promoted, be then promoted to UASB reactor again.
6. the treatment process of Almond debitterizing wastewater according to claim 2, it is characterised in that:UASB described in step c is anti- Inlet flow-patterm in device is answered to control 6.5~7.5, water temperature is controlled at 33~38 DEG C.
7. a kind of processing system of Almond debitterizing wastewater, it is characterised in that:Including the aeration tune being sequentially connected in series from upstream to downstream Save pond, decyanization reaction device, air-floating apparatus, water pump, UASB reactor, biological reaction pool group and filter device;The biology is anti- Answering pond group includes the one-stage hydrolysis pool being sequentially connected in series, first stage precipitation tank, level-one aerobic tank, second-level settling pond, second level hydrolytic tank, three Grade sedimentation basin, with second level aerobic tank, level Four sedimentation basin;Between the first stage precipitation tank and one-stage hydrolysis pool, second-level settling pond and one It is respectively equipped between grade aerobic tank, between three-level sedimentation basin and second level hydrolytic tank, between level Four sedimentation basin and second level aerobic tank independent Sludge refluxing apparatus.
8. the processing system of Almond debitterizing wastewater according to claim 7, it is characterised in that:It is set in aerating regulation pond upstream Set pretreatment pool.
9. the processing system of Almond debitterizing wastewater according to claim 7, it is characterised in that:The aerating regulation pond setting In underground, the decyanization reaction device includes the decyanation pond for being equipped with gas collecting apparatus and being totally-enclosed pond body;The air-floating apparatus is adopted With appearance gas air-flotation type;The filter element includes at least one of more medium filter, active carbon filter.
10. the processing system of Almond debitterizing wastewater according to claim 7, it is characterised in that:Divide equally in hydrolytic tanks at different levels It She You not filler and diving mixing device;Filler and aerator are respectively equipped in aerobic tanks at different levels;Sedimentation basins at different levels are adopted With flat flow mudpan, and scraping and sucking machine is additionally provided in mudpan.
CN201810718215.5A 2018-07-03 2018-07-03 The treatment process and processing system of Almond debitterizing wastewater Pending CN108862849A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110171879A (en) * 2019-06-17 2019-08-27 南京大学 A kind of fermentation waste water treatment process containing acrylonitrile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110171879A (en) * 2019-06-17 2019-08-27 南京大学 A kind of fermentation waste water treatment process containing acrylonitrile

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