CN109534614A - A kind of deep treatment method of high ammonia-nitrogen wastewater - Google Patents

A kind of deep treatment method of high ammonia-nitrogen wastewater Download PDF

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Publication number
CN109534614A
CN109534614A CN201811597684.2A CN201811597684A CN109534614A CN 109534614 A CN109534614 A CN 109534614A CN 201811597684 A CN201811597684 A CN 201811597684A CN 109534614 A CN109534614 A CN 109534614A
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denitrification pond
high ammonia
nitrogen wastewater
pond
prepositive
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胥俊杰
李书岗
许凤华
孙英
邹纯洁
韩丽辉
常鑫
胡海冉
樊扬扬
孙俊莉
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Hebei Xu Jie Environmental Engineering Co Ltd
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Hebei Xu Jie Environmental Engineering 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
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/006—Regulation methods for biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness
    • C02F5/06—Softening water by precipitation of the hardness using calcium compounds

Abstract

The invention discloses a kind of deep treatment method of high ammonia-nitrogen wastewater, this method using Prepositive denitrification-it is aerobic-rear-mounted denitrification technique and catalytic ozonation tower advanced treatment process be to TN value > 500mg/L, NH3- N value>400mg/L high ammonia-nitrogen wastewater is handled, three bursts of waste water conveying capacities in Prepositive denitrification pond are flowed to by deploying, control mass ratio>4 C/N in Prepositive denitrification pond, Prepositive denitrification pond DO<0.5mg/L is controlled simultaneously, aerobic tank DO<1.5mg/L, 4000~6000mg/L of aerobic tank MLSS, rear-mounted denitrification pond mass ratio>2.5 C/N, advanced treating most afterwards through high density precipitating and catalytic ozonation, makes high ammonia-nitrogen wastewater reach the discharge standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) level-one A.The deep treatment method of acquisition, easy to operate, operating cost is low, and process performance stability and high efficiency.

Description

A kind of deep treatment method of high ammonia-nitrogen wastewater
Technical field
The present invention relates to environmental technology field more particularly to a kind of deep treatment methods of high ammonia-nitrogen wastewater.
Background technique
In wastewater treatment, the removal of ammonia nitrogen mainly utilizes nitrification and denitrification to act on, and nitrification is ammoniacal nitrogen aerobic Under conditions of, the effect through nitrite bacteria and nitrobacteria is converted into the process of nitrite and nitrate；Denitrification Also referred to as denitrification, be denitrifying bacteria under anoxic conditions, restore nitrite and nitrate using carbon source, release nitrogen Process；And Determination of Total Nitrogen in Waste Water mainly by the inorganic nitrogens such as nitrate nitrogen, nitrite nitrogen and ammonia nitrogen and protein, amino acid and has The organic nitrogens such as machine amine composition；Organic nitrogen in total nitrogen passes through ammoniation first and is converted into ammonia nitrogen, then by nitrification and instead Nitrification is changed into nitrogen, escapes from water.
Current ammonia nitrogen removal technique is only good for the ammonia nitrogen of sanitary sewage and total nitrogen treatment effect, but for Industry Waste The high NH_3-N treating effect of water is very undesirable, high ammonia-nitrogen wastewater be typically derived from medication chemistry, oil refining, chemical fertilizer, meat packing, The production processes such as Feed Manufacturing, animal husbandry and garbage loading embeading, wherein COD concentration > 5000mg/L, NH4 +- N concentration > 400mg/L, TN Concentration > 500mg/L, significantly larger than the COD 150~300mg/L, NH of sanitary sewage4 +35~80mg/ of-N 35~65mg/L, TN The concentration range of L can cause enormous impact to system if high ammonia-nitrogen wastewater is directly discharged into biochemical system, generate to microorganism Serious inhibition and toxic action.The advanced treating of high ammonia-nitrogen wastewater generally uses " materialization+biochemistry+depth " to combine at present Processing method, but the operating cost of this treatment process is higher, and is discharged total values of nitrogen might and processing standard is often not achieved, and causes enterprise Burden weight, environmental protection pressure are big.
Summary of the invention
To solve the shortcomings of the prior art, the present invention provides a kind of deep treatment methods of high ammonia-nitrogen wastewater, should Method is in " Prepositive denitrification-aerobic-rear-mounted denitrification " biochemical process and " high density precipitating-catalytic ozonation " depth process Combination under, using the shirtsleeve operation method of operation, control response parameter, make the advanced treating stability and high efficiency of high ammonia-nitrogen wastewater, And reach the discharge standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) level-one A, and operating cost It is low.
To achieve the above object, the deep treatment method of a kind of high ammonia-nitrogen wastewater provided by the invention, including following processing Step:
A, by high ammonia-nitrogen wastewater to be processed it is pH adjusted after, a part is delivered to anaerobic reactor, by anaerobism Prepositive denitrification pond is delivered to after reason, another part is fed directly to Prepositive denitrification pond；
B, the waste water of Prepositive denitrification pond discharge enters aerobic tank, and lye is added to aerobic tank, controls aerobic tank end PH7.8~8.2；
C, waste water a part of aerobic tank end discharge is back to Prepositive denitrification pond, and another part is delivered to the anti-nitre of postposition Change pond, while supplementing the source C to rear-mounted denitrification pond；
Flow to three bursts of waste water conveying capacities in Prepositive denitrification pond by deploying, control C/N mass ratio in Prepositive denitrification pond > 4, while controlling Prepositive denitrification pond DO value < 0.5mg/L；Aerobic tank DO < 1.5mg/L is controlled, MLSS is in 4000~6000mg/L； Control rear-mounted denitrification pond mass ratio > 2.5 C/N；
D, the water outlet in rear-mounted denitrification pond is delivered to secondary sedimentation tank, is delivered to potassium permanganate composites after precipitation, precipitating Bed mud a part afterwards is fed back to preposition nitrification tank, another part emission treatment；
E, it is added to potassium permanganate composites and removes hard agent, after reaction is sufficiently stirred, waste water is delivered to level-one intermediate pool tune PH is saved, is then lifted out to sandfiltration pot, sandfiltration pot is controlled and is discharged SS concentration < 10mg/L；
F, the water outlet of sandfiltration pot is promoted to catalytic ozonation tower after second level intermediate pool, after catalytic oxidation treatment It can direct emission；
Processing method of the invention conveys three strands of different waste water using to Prepositive denitrification pond, i.e., after pH being adjusted to Processing high ammonia-nitrogen wastewater is delivered to Prepositive denitrification pond through anaerobic reactor, and the high ammonia-nitrogen wastewater to be processed after pH is adjusted is directly defeated It send to Prepositive denitrification pond and aerobic tank tail end wastewater and is back to Prepositive denitrification pond, and plan as a whole three bursts of waste water conveyings of regulation It measures to control the C/N mass ratio in Prepositive denitrification pond, it is useless by three strands to improve Prepositive denitrification processing capacity and processing effect The regulation of water had not only been avoided that the excessively high caused sludge poisoning of biochemical section sludge loading, but also can be not necessarily to using the carbon source in raw water Under the premise of additional any carbon source, keep carbon-nitrogen ratio nutrition in Prepositive denitrification pond balanced；By Prepositive denitrification Chi Houzai into Enter aerobic tank, while controlling the high sludge concentration and low DO condition of aerobic tank, completes high efficiency denitrogenation, energy can either be reduced Source consumption, and can effectively avoid aerobic tank tail end wastewater oxygen carrying content and the oxygen poison in rear-mounted denitrification pond is impacted, additionally it is possible to after reduction Set the carbon source amount in denitrification pond；Then handled and secondary precipitation processing, realization pair by adding the rear-mounted denitrification of carbon source The efficient biochemical of high ammonia-nitrogen wastewater is handled, and is finally utilized highly dense sedimentation basin and catalytic ozonation tower advanced treating, is reached direct The standard of discharge.Deep treatment method of the invention is raw using " anaerobism generator+Prepositive denitrification-aerobic-rear-mounted denitrification " Chemical industry skill and " high density precipitating+catalytic ozonation " depth process handle high ammonia-nitrogen wastewater, make the depth of high ammonia-nitrogen wastewater Efficient stable is managed, easy to operate, operating cost is low, and high treating effect.
As the restriction to above-mentioned technical proposal, pH described in step a is adjusted to 5.0~7.0.
As the restriction to above-mentioned technical proposal, lye described in step b includes NaOH solution, Na2CO3Solution.
As the restriction to above-mentioned technical proposal, the waste water of the discharge of aerobic tank end described in step c to Prepositive denitrification pond Regurgitant volume be 4~10 times of high ammonia-nitrogen wastewater inflow to be processed.
As the restriction to above-mentioned technical proposal, the source C described in step c include glucose, methanol, ethyl alcohol, in sodium acetate.
As the restriction to above-mentioned technical proposal, bed mud the returning to Prepositive denitrification pond of secondary sedimentation tank described in step d Flow is 1~2 times of high ammonia-nitrogen wastewater inflow to be processed.
As the restriction to above-mentioned technical proposal, the Prepositive denitrification-is aerobic-rear-mounted denitrification technique in preposition anti-nitre Change pond ORP < -20mv, rear-mounted denitrification pond ORP < -80mv.
As the restriction to above-mentioned technical proposal, except hard agent includes NaOH solution, Na described in step e2CO3Solution, CaO are molten Liquid.
As the restriction to above-mentioned technical proposal, TN value > 500mg/L, NH of the high ammonia-nitrogen wastewater to be processed3- N value > 400mg/L。
Process operating parameters in processing method are further limited, lye, the source C can be used and remove hard agent substance classes, are conducive to To the advanced treating of high ammonia-nitrogen wastewater, keep the effluent quality effect of high ammonia-nitrogen wastewater optimal.
In conclusion using technical solution of the present invention, the high ammonia-nitrogen wastewater deep treatment method of acquisition, in preposition anti-nitre Change in the treatment process of pond-aerobic tank-rear-mounted denitrification pond, conveys three strands of different waste water using to Prepositive denitrification pond, and assist Three bursts of waste water conveying capacities are adjusted to avoid department of biochemistry by the regulation to three strands of waste water to control the treatment effect in Prepositive denitrification pond The paralysis of system, also makes full use of raw water, casts out additional carbon, while enhancing biochemical system anti-impact force；Then pass through control again Aerobic tank response parameter, and a small amount of and proper amount of carbon source is added to rear-mounted denitrification pond, it realizes to high ammonia-nitrogen wastewater efficient biochemical Processing；Finally pass through potassium permanganate composites and catalytic ozonation tower advanced treating, direct emission simultaneously reaches " urban wastewater treatment Factory's pollutant emission standard " (GB18918-2002) level-one A processing standard.High ammonia-nitrogen wastewater advanced treating side of the invention Method solves the problems, such as that high ammonia-nitrogen wastewater is difficult and effluent quality is not up to standard, and also easy to operate, convenient, treatment effect is efficient Stablize, while environmental protection of enterprise pressure is small, burden is relatively light.
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 advanced treating to high ammonia-nitrogen wastewater.
Embodiment 1.1
It is 240m to the inflow from vitamin B12 production technology3/ h, TN concentration are 586mg/L, NH3- N concentration is 472mg/L, COD concentration are the high ammonia-nitrogen wastewater of 8640mg/L, are handled by the following method:
A, high ammonia-nitrogen wastewater pH to be processed is adjusted to 5.5, is fed back by the TN and COD value of high ammonia-nitrogen wastewater to be processed By 175m3The high ammonia-nitrogen wastewater to be processed of/h is delivered in anaerobic reactor, is delivered to Prepositive denitrification-again after Anaerobic Treatment The Prepositive denitrification pond of aerobic-rear-mounted denitrification technique；Again by 65m3The high ammonia-nitrogen wastewater to be processed of/h is fed directly to preposition Denitrification pond, while controlling DO value in Prepositive denitrification pond is 0.2mg/L；
B, waste water is 1.5mg/L, aerobic tank from aerobic tank, control aerobic tank DO value is flowed into through Prepositive denitrification pond MLSS is 5680mg/L, while will dissolve as the NaOH solution that concentration is 30% and being added in aerobic tank, makes aerobic tank end pH value It is maintained at 7.9；
C, after aerobic tank is disposed, waste water a part of end discharge is back to by 5 times of inflow preposition anti- Nitrification tank, rest part waste water enter rear-mounted denitrification pond, add glucose into rear-mounted denitrification pond, make rear-mounted denitrification C/N mass ratio is 3.0 in pond；
Three bursts of waste water conveying capacities that Prepositive denitrification pond is flowed to by deploying, make C/N mass ratio in Prepositive denitrification pond 4.0；
D, it is delivered to secondary sedimentation tank after the processing of the denitrification in rear-mounted denitrification pond, obtains effluent quality after precipitation TN concentration is 25mg/L, NH3- N concentration is 3.5mg/L, and COD concentration is the supernatant of 150mg/L, and supernatant conveys high density Sedimentation basin；It is 11300mg/L that the bed mud of precipitating, which obtains MLSS through detection, then a part is back to preposition anti-by 1 times of inflow In nitrification tank, rest part carries out sludge dewatering emission treatment；
E, NaOH and Na are first added into potassium permanganate composites2CO3Solution adds PAC solution and PAM solution, waste water warp It is delivered to level-one intermediate pool after precipitating is sufficiently stirred, and adjusts pH to 7.6, is then lifted out to sandfiltration pot, is taken off in sandfiltration pot Suspended matter in water removal makes sandfiltration pot be discharged SS concentration 7mg/L；
F, it after the water outlet of sandfiltration pot being delivered to second level intermediate pool, then is promoted to catalytic ozonation tower and is handled, Obtained effluent quality COD is 38.2mg/L, TN 11mg/L, NH3- N is 0.52mg/L, is discharged direct emission；
In above-mentioned processing method, MLSS is 30g/L in anaerobic reactor, temperature is 35 DEG C, hydraulic detention time is For 24 hours, DO value is 0mg/L；MLSS is 5570mg/L in Prepositive denitrification pond, temperature is 30 DEG C, hydraulic detention time be for 24 hours, pH Value is 7.3, ORP value < -20mv；In aerobic tank temperature be 28 DEG C, hydraulic detention time 70h；MLSS is in rear-mounted denitrification pond 5690mg/L, temperature are 27 DEG C, hydraulic detention time 8h, DO value is 0.3mg/L, pH 8.1, ORP < -80mv；Ozone catalytic In oxidizing tower temperature be 25 DEG C, hydraulic detention time 1.5h, pH value 7.5, ORP 400mv.
After above-mentioned processing, the TN concentration of high ammonia-nitrogen wastewater drops to 11mg/L, NH from 586mg/L3- N concentration is from 472mg/L 0.52mg/L is dropped to, COD concentration drops to 38.2mg/L from 8640mg/L, so that TN removal rate is reached 98.1%, NH4-N removal rate and reaches Reach 99.6% to 99.9%, COD removal rate.
Embodiment 1.2
It is 29m to the inflow from neomycinsulphate production technology3/ h, TN concentration are 620mg/L, NH4-N concentration For 430mg/L, COD concentration is the high ammonia-nitrogen wastewater of 8500mg/L, is handled by the following method:
A, high ammonia-nitrogen wastewater pH to be processed is adjusted to 6.2, is fed back by the TN and COD value of high ammonia-nitrogen wastewater to be processed By 20.5m3The high ammonia-nitrogen wastewater to be processed of/h is delivered in anaerobic reactor, is delivered to preposition anti-nitre again after Anaerobic Treatment The Prepositive denitrification pond of change-aerobic-rear-mounted denitrification technique；Again by 8.5m3The high ammonia-nitrogen wastewater to be processed of/h is fed directly to Prepositive denitrification pond, while controlling DO value in Prepositive denitrification pond is 0.2mg/L；
B, waste water is 1.2mg/L, aerobic tank from aerobic tank, control aerobic tank DO value is flowed into through Prepositive denitrification pond MLSS is 4560mg/L, while will dissolve as the Na that concentration is 30%2CO3Solution is added in aerobic tank, makes aerobic tank end pH value It is maintained at 8.1；
C, after aerobic tank is disposed, waste water a part of end discharge is back to by 6 times of inflow preposition anti- Nitrification tank, rest part waste water enter rear-mounted denitrification pond, add methanol into rear-mounted denitrification pond, make rear-mounted denitrification pond Interior C/N mass ratio is 3.2；
Three bursts of waste water conveying capacities that Prepositive denitrification pond is flowed to by deploying, make C/N mass ratio in Prepositive denitrification pond 4.5；
D, it is delivered to secondary sedimentation tank after the processing of the denitrification in rear-mounted denitrification pond, obtains effluent quality after precipitation TN concentration is 26mg/L, NH3- N concentration is 2mg/L, and COD concentration is the supernatant of 180mg/L, and it is heavy that supernatant conveys high density Shallow lake pond；It is 9460mg/L that the bed mud of precipitating, which obtains MLSS through detection, then a part is back to preposition anti-nitre by 1.1 times of inflow Change pond, rest part carries out sludge dewatering emission treatment；
E, NaOH and CaO solution is first added into potassium permanganate composites, adds PAC solution and PAM solution, waste water is through filling It is delivered to level-one intermediate pool after dividing stirring precipitating, and adjusts pH to 7.8, is then lifted out to sandfiltration pot, is removed in sandfiltration pot Suspended matter in water makes sandfiltration pot be discharged SS concentration 6mg/L；
F, it after the water outlet of sandfiltration pot being delivered to second level intermediate pool, then is promoted to catalytic ozonation tower and is handled, Obtained effluent quality COD is 42mg/L, TN 13mg/L, NH3- N is 1.2mg/L, and water outlet can direct emission；
In above-mentioned processing method, MLSS is 35g/L in anaerobic reactor, temperature is 36 DEG C, hydraulic detention time is 26h, DO value are 0mg/L；MLSS is 4370mg/L in Prepositive denitrification pond, temperature is 28 DEG C, hydraulic detention time 26h, pH Value is that 7.4, ORP value is < -20mv；In aerobic tank temperature be 27 DEG C, hydraulic detention time 76h；MLSS in rear-mounted denitrification pond For 4610mg/L, temperature be 26 DEG C, hydraulic detention time 9h, DO value is 0.1mg/L, pH value 7.6, ORP are < -80mv； In catalytic ozonation tower temperature be 24 DEG C, hydraulic detention time 1.2h, pH value 7.6, ORP 350mv.
After above-mentioned processing, the TN concentration of high ammonia-nitrogen wastewater drops to 13mg/L, NH from 620mg/L3- N concentration is from 430mg/L 1.2mg/L is dropped to, COD concentration drops to 42mg/L from 8500mg/L, and TN removal rate is made to reach 97.9%, NH3- N removal rate reaches 99.7%, COD removal rate reach 99.5%.
Embodiment 1.3
It is 38m to the inflow from avermectin production technology3/ h, TN concentration are 560mg/L, and NH4-N concentration is 468mg/L, COD concentration are the high ammonia-nitrogen wastewater of 9360mg/L, are handled by the following method:
A, high ammonia-nitrogen wastewater pH to be processed is adjusted to 5.2, is fed back by the TN and COD value of high ammonia-nitrogen wastewater to be processed By 28.88m3The high ammonia-nitrogen wastewater to be processed of/h is delivered in anaerobic reactor, is delivered to preposition anti-nitre again after Anaerobic Treatment The Prepositive denitrification pond of change-aerobic-rear-mounted denitrification technique；Again by 9.12m3The high ammonia-nitrogen wastewater of/h is fed directly to preposition anti- Nitrification tank, while controlling DO value in Prepositive denitrification pond is 0.15mg/L；
B, waste water is 1.1mg/L, aerobic tank from aerobic tank, control aerobic tank DO value is flowed into through Prepositive denitrification pond MLSS is 4830mg/L, while will dissolve as the NaOH solution that concentration is 30% and being added in aerobic tank, makes aerobic tank end pH value It is maintained at 8.2；
C, after aerobic tank is disposed, waste water a part of end discharge is back to by 5 times of inflow preposition anti- Nitrification tank, rest part waste water enter rear-mounted denitrification pond, add glucose into rear-mounted denitrification pond, make rear-mounted denitrification C/N mass ratio is 3.5 in pond；
Three bursts of waste water conveying capacities that Prepositive denitrification pond is flowed to by deploying, make C/N mass ratio in Prepositive denitrification pond 5.0；
D, it is delivered to secondary sedimentation tank after the processing of the denitrification in rear-mounted denitrification pond, obtains effluent quality after precipitation TN concentration is 23mg/L, NH3- N concentration is 2mg/L, and COD concentration is the supernatant of 187mg/L, and it is heavy that supernatant conveys high density Shallow lake pond；It is 4680mg/L that the bed mud of precipitating, which obtains MLSS through detection, then a part is fed back to preposition anti-nitre by 1.3 times of inflow Change pond, rest part carries out emission treatment；
E, NaOH and CaO solution is first added into potassium permanganate composites, adds PAC solution and PAM solution, waste water is through filling It is delivered to level-one intermediate pool after dividing stirring precipitating, and adjusts pH to 7.7, is then lifted out to sandfiltration pot, is removed in sandfiltration pot Suspended matter in water makes sandfiltration pot be discharged SS concentration 5mg/L；
F, it after the water outlet of sandfiltration pot being delivered to second level intermediate pool, then is promoted to catalytic ozonation tower and is handled, Obtained effluent quality COD is 39mg/L, TN 12mg/L, NH4-N 1.8mg/L, is discharged direct emission；
In above-mentioned processing method, MLSS is 32g/L in anaerobic reactor, temperature is 35 DEG C, hydraulic detention time is 22h, DO value are 0mg/L；MLSS is 4640mg/L in Prepositive denitrification pond, temperature is 29 DEG C, hydraulic detention time 22h, pH Value is that 7.3, ORP is < -30mv；In aerobic tank temperature be 28 DEG C, hydraulic detention time 72h；MLSS is in rear-mounted denitrification pond 4710mg/L, temperature are 28 DEG C, hydraulic detention time 7h, DO 0.2mg/L, pH value 7.6, ORP are < -80mv；Ozone In catalysis oxidizing tower temperature be 25 DEG C, hydraulic detention time 1.4h, pH value 7.7, ORP 230mv.
After above-mentioned processing, the TN concentration of high ammonia-nitrogen wastewater drops to 12mg/L from 560mg/L, and NH4-N concentration is from 468mg/L 1.8mg/L is dropped to, COD concentration drops to 39mg/L from 9360mg/L, so that TN removal rate is reached 97.8%, NH4-N removal rate and reaches 99.6%, COD removal rate reach 99.5%.
Embodiment two
Use processing method identical with embodiment 1.1 to high ammonia-nitrogen wastewater (inflow 240m3/ h) carry out depth Reason, in the identical lower detection C/N mass ratio in Prepositive denitrification pond of other operating conditions, the control parameter of aerobic tank, the anti-nitre of postposition Change pond C/N mass ratio and secondary settling tank bed mud to Prepositive denitrification pond regurgitant volume when, it is Prepositive denitrification pond, secondary settling tank, smelly The effluent quality of oxygen catalysis oxidizing tower, as a result as shown in the table:
As seen from the above table, in high ammonia-nitrogen wastewater deep treatment method of the invention, the C/N mass ratio in Prepositive denitrification pond, Aerobic tank pH, aerobic tank MLSS, the regurgitant volume of aerobic tank tail end wastewater to Prepositive denitrification pond, the C/N matter in rear-mounted denitrification pond Measure regurgitant volume of the bed mud of ratio and secondary settling tank to Prepositive denitrification pond, advanced treating of these control conditions to high ammonia-nitrogen wastewater It is most important；Meeting within the scope of control condition of the present invention and in the case where cooperating, the depth of the high ammonia-nitrogen wastewater Reason method not only makes TN value > 500mg/L, NH3- N value > 400mg/L high ammonia-nitrogen wastewater handles efficient stable, and reaches " cities and towns Wastewater Treatment discharge standard " (GB18918-2002) level-one A processing standard, and operating cost is low.
Comparative example
A kind of deep treatment method of high ammonia-nitrogen wastewater, using the processing method roughly the same with embodiment 1.1, uniquely not Be with place, high ammonia-nitrogen wastewater to be processed is all delivered to anaerobic reactor, then by Prepositive denitrification pond-aerobic tank-after It sets denitrification pond to be handled, rather than high ammonia-nitrogen wastewater a part to be processed is delivered to before anaerobic reactor is delivered to again Denitrification pond is set, another part is fed directly to Prepositive denitrification pond, then is handled by aerobic tank-rear-mounted denitrification pond.
High ammonia-nitrogen wastewater to be processed is all delivered to anaerobic reactor processing, in the process of running, Prepositive denitrification Carbon-nitrogen ratio numerous imbalances in pond cause Prepositive denitrification function and effect faint, seriously affect effluent quality, cause Prepositive denitrification Pond domestic demand adds a large amount of carbon source to maintain the nutrient balance of carbon-nitrogen ratio.
As seen from the above table, using the processing method of comparative example, the Prepositive denitrification in high ammonia-nitrogen wastewater advanced treatment process Pond need to supplement a large amount of carbon sources, even up to 1.6kg/m3Water；If the carbon source of supplement is calculated according to one ton of glucose is 3750 yuan, Cost of water treatment per ton will increase by 6 yuan.It is to be processed by comparative example as it can be seen that in high ammonia-nitrogen wastewater deep treatment method of the invention High ammonia-nitrogen wastewater a part be delivered to anaerobic reactor and be delivered to Prepositive denitrification pond again, another part is fed directly to preposition Denitrification pond, then the mode handled by aerobic tank-rear-mounted denitrification pond, are all delivered to than high ammonia-nitrogen wastewater to be processed and detest Oxygen reactor, then the mode handled by Prepositive denitrification pond-aerobic tank-rear-mounted denitrification pond, not only operating cost is low, and And high treating effect.
In conclusion the deep treatment method of high ammonia-nitrogen wastewater of the invention, Prepositive denitrification-it is aerobic-the anti-nitre of postposition Under the premise of chemical industry skill, by regulating and controlling to flow to three strands of waste water and waste water conveying capacity in Prepositive denitrification pond, and aerobic tank is controlled Response parameter, then proper amount of carbon source is added to rear-mounted denitrification pond, to complete the efficient process of biochemical section；Finally in conjunction with highly dense Sedimentation basin and catalytic ozonation tower advanced treating are spent, the processing standard of discharge is reached.High ammonia nitrogen advanced treating side of the invention Method, can on the basis of making full use of raw water efficient process high ammonia-nitrogen wastewater, avoid biochemical section sludge loading excessively high, prevent from giving birth to Change systemic breakdown, enhances the anti-impact force of biochemical system, save additional carbon；Easy to operate, convenient simultaneously, treatment effect is efficient Stablize, and environmental protection of enterprise pressure is small, burden is relatively light.

Claims (9)

1. a kind of deep treatment method of high ammonia-nitrogen wastewater, which is characterized in that including following processing step:
A, by high ammonia-nitrogen wastewater to be processed it is pH adjusted after, a part is delivered to anaerobic reactor, after Anaerobic Treatment It is delivered to Prepositive denitrification pond, another part is fed directly to Prepositive denitrification pond；
B, Prepositive denitrification pond discharge waste water enter aerobic tank, to aerobic tank be added lye, control aerobic tank end pH7.8~ 8.2；
C, waste water a part of aerobic tank end discharge is back to Prepositive denitrification pond, and another part is delivered to rear-mounted denitrification Pond, while the source C is supplemented to rear-mounted denitrification pond；
Three bursts of waste water conveying capacities in Prepositive denitrification pond are flowed to by deploying, and control mass ratio > 4 C/N in Prepositive denitrification pond, together When control Prepositive denitrification pond DO value < 0.5mg/L；Aerobic tank DO < 1.5mg/L is controlled, MLSS is in 4000~6000mg/L；Control Rear-mounted denitrification pond mass ratio > 2.5 C/N；
D, the water outlet in rear-mounted denitrification pond is delivered to secondary sedimentation tank, is delivered to potassium permanganate composites after precipitation, after precipitating Bed mud a part is fed back to preposition nitrification tank, another part emission treatment；
E, it is added to potassium permanganate composites and removes hard agent, after reaction is sufficiently stirred, waste water is delivered to level-one intermediate pool and adjusts pH, It is then lifted out to sandfiltration pot, controls sandfiltration pot and be discharged SS concentration < 10mg/L；
F, the water outlet of sandfiltration pot is promoted to catalytic ozonation tower after second level intermediate pool, can be straight after catalytic oxidation treatment Run in and puts.
2. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: pH described in step a It is adjusted to 5.0~7.0.
3. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: alkali described in step b Liquid includes NaOH solution, Na2CO3Solution.
4. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: good described in step c The regurgitant volume in the waste water of oxygen pond end discharge to Prepositive denitrification pond is 4~10 times of high ammonia-nitrogen wastewater inflow to be processed.
5. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: the source C described in step c Including glucose, methanol, ethyl alcohol, sodium acetate.
6. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: two described in step d The regurgitant volume in the bed mud of secondary sedimentation basin to Prepositive denitrification pond is 1~2 times of high ammonia-nitrogen wastewater inflow to be processed.
7. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: the preposition anti-nitre Prepositive denitrification pond ORP < -20mv, rear-mounted denitrification pond ORP < -80mv in change-aerobic-rear-mounted denitrification technique.
8. a kind of deep treatment method of high ammonia-nitrogen wastewater according to claim 1, it is characterised in that: removed described in step e Hard agent includes NaOH solution, Na2CO3Solution, CaO solution.
9. the deep treatment method of high ammonia-nitrogen wastewater according to claim 1 to 8, it is characterised in that: it is described to Handle TN value > 500mg/L, NH of high ammonia-nitrogen wastewater3- N value > 400mg/L.
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CN107381961A (en) * 2017-08-25 2017-11-24 天津诚信环球节能环保科技有限公司 A kind of processing system of decentralized type sewage and the processing method using the processing system
CN108002656A (en) * 2017-12-21 2018-05-08 沈阳建筑大学 A kind of modularization integrated technique system and method for handling meat processing waste water

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CN201240944Y (en) * 2008-08-18 2009-05-20 刘晓宇 Facultative aerobic / aerobic / facultative aerobic coking waste water biological full denitrification processing device
CN202430091U (en) * 2011-12-28 2012-09-12 广州市市政工程设计研究院 De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR)
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