CN108455784A - One kind reducing sludge yield sewage treatment process for oil processing industry - Google Patents
One kind reducing sludge yield sewage treatment process for oil processing industry Download PDFInfo
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- CN108455784A CN108455784A CN201710095646.6A CN201710095646A CN108455784A CN 108455784 A CN108455784 A CN 108455784A CN 201710095646 A CN201710095646 A CN 201710095646A CN 108455784 A CN108455784 A CN 108455784A
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- sewage
- treatment process
- processing industry
- oil processing
- sludge yield
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Classifications
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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
- C02F1/52—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
- C02F1/66—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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/322—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from vegetable oil production, e.g. olive oil production
-
- 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
- C02F3/02—Aerobic processes
Abstract
One kind reducing sludge yield sewage treatment process for oil processing industry, comprises the steps of：(1) sewage enters level-one coagulating sedimentation reaction tank by elevator pump, and addition highly basic adjusts pH, and lime removes phosphor in sewage；(2) it enters in two-stage coagulation precipitation reaction pond, adds lime and PAC；(3) biochemical system, removal SS, COD, BOD, total phosphor contaminant are entered；(4) enter three heavy ponds, add PAC；(5) water outlet is filtered discharge, and excess sludge, which enters after plate and frame filter press is filtered, transports outward sludge.The present invention is advantageous in that：1, with the adding method of lime and NaOH, pH can be effectively adjusted, reduces sludge yield；2, using two-stage coagulation-settlement process, it is phosphorous and reduce biochemical treatment load that sedimentation basin water outlet can be reduced；3, compared with traditional handicraft, reagent cost reduces by 13%, reduces sludge yield about 20%.
Description
(1) invention field:
The present invention relates to a kind of sewage treatment process, more particularly to a kind of oil processing industry that is used for reduce sludge yield dirt
Water treatment technology.
(2) background of invention:
Traditional sewage treatment process mainly uses materializing strategy+biochemical treatment+filtering technique group in oil processing industry
It closes, wherein materializing strategy generally uses the phosphorus in the techniques such as oil removal, coagulating sedimentation, air-flotation system removal sewage, biochemical treatment master
The organic pollutions such as COD, SS in sewage, BOD, ammonia nitrogen are removed, filtering technique is mainly to ensureing that water outlet SS reaches after sewage water filtration
Mark.Coagulating sedimentation in materializing strategy uses sulfuric acid demulsification, lime to adjust pH to remove most phosphorus in sewage；Air-flotation system
Pressure air-dissolving formula air-flotation system is mainly used, assistant medicament is mainly PAC, PAM；Biochemical system mostly uses contact oxidation technology；
Rear end is aided with filtration system except the SS in decontaminated water, and filtration system is usually sand filter and activated carbon equipment.Oil processing industry
Sewage disposal conventional process flow figure is shown in attached drawing 1.
In recent years, with the increasing of environmentally friendly dynamics, pollution emission standard constantly upgrades, and lime tune is used in precipitation process of coagulation
Major defect is existing for pH and dephosphorization：1, lime tune pH and dephosphorization are utilized merely, and solubility has anti-dissolubility, and it is dissolved
Degree is smaller, and dosage is big, and the production quantity of slag is high, and sludge yield is higher；2, sulfate ion can consume the calcium ion that lime dissociates,
Reduce the reacting dose of calcium ion and phosphate radical, reduces the reaction efficiency with phosphate radical；3, simple level-one coagulating sedimentation cannot
Meet and total phosphorus is reduced to ＜ 3mg/L from 30~50mg/L.Therefore, the exceeded risk of existing treatment process generally existing total phosphorus and
The high present situation of sludge yield, causes operation cost of enterprises higher.
Therefore, optimize sewage treatment process, reduce added amount of chemical, reduce sludge yield, make total phosphorus stably reaching standard, become
Project urgently to be resolved hurrily.
(3) invention content:
The purpose of the present invention is to provide one kind reducing sludge yield sewage treatment process for oil processing industry, it is solved
Dosage is big when traditional handicraft of having determined utilizes merely lime tune pH and dephosphorization, the higher problem of sludge yield, while passing through optimization
The physicochemical techniques of dephosphorization improve the reaction efficiency of calcium ion and phosphate radical, reduce sludge yield, keep water outlet phosphorous lower.
Technical scheme of the present invention：One kind reducing sludge yield sewage treatment process, feature for oil processing industry
It is to comprise the steps of：
(1) level-one coagulating sedimentation：Sewage enters level-one coagulating sedimentation reaction tank by elevator pump, and addition highly basic adjustment pH is extremely
9~11, then every liter of sewage addition 150~250mg lime removal phosphor in sewage, the mass ratio for adding highly basic and lime are
(0.5~1.5):1,10~30min of reaction time, using mechanical agitation, 60~80r/min of rate；
(2) two-stage coagulation precipitates：Step (1) water outlet is entered in two-stage coagulation precipitation reaction pond, every liter of sewage addition
50~80mg lime, every liter of sewage adds PAC, the 10~30min of reaction time of 50~80mg, using mechanical agitation, rate 60
~80r/min；
(3) biochemical system：Step (2) water outlet is entered into biochemical system, after removing SS, COD, BOD, total phosphor contaminant,
Again by biochemical system catalytic oxidation, sedimentation in secondary sedimentation tank, SS, COD, BOD in waste water are further removed；
(4) three heavy ponds：Step (3) water outlet is entered into three heavy ponds, every liter of sewage adds 20~30mgPAC, reaction time 10
~30min, using mechanical agitation, 60~80r/min of rate；
(5) filtration system：Step (4) water outlet is filtered discharge, excess sludge enters plate and frame filter press and is filtered
Sludge is transported outward afterwards.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 32%~60%NaOH solution or the ratio combination of KOH solution one or two arbitrary volume that highly basic, which is mass fraction, in.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 30~80mg/L that water inlet is phosphorous in, instantaneous water≤200m3/ h is discharged phosphorous ＜ 5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(2) inlet flow-patterm is 9~10 in, instantaneous water≤200m3/ h is discharged phosphorous ＜ 1.5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(3) instantaneous water≤200m in3/ h is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.8mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(4) inlet flow-patterm is 7.0~8.0 in, is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.5mg/L.
The present invention is advantageous in that：1, the adding method that original 100% lime is replaced with lime and NaOH, can be effective
It adjusts pH, Ca is provided2+Dephosphorization, and the yield of sludge can be reduced；2, using two-stage coagulation-settlement process, sedimentation basin can be reduced and gone out
Water is phosphorous, and can guarantee that biochemical water inlet SS is relatively low, reduces biochemical treatment load；3, compared with traditional handicraft, the technique after optimization
Reagent cost reduces by 13%, reduces sludge yield about 20%, ton cost of water treatment directly reduces by 0.32 yuan/m3, total phosphorus stabilizer exists
0.5mg/L or less (is shown in Table lattice 1).
Table 1：With traditional handicraft index Contrast on effect
(4) it illustrates：
Attached drawing 1 is oil processing industry sewage disposal conventional process flow figure.
Technical process is that sewage enters oil removal regulating reservoir, and sewage, regulating water quality are collected by regulating reservoir；Subsequently into
Coagulating sedimentation, while adding lime and adjusting pH value, by reacting, precipitating, remove part orthophosphates；The sludge being settled out enters
Plate and frame filter press is pending, and the sewage being settled out enters air-flotation system；Then PAC, PAM are added into sewage, is taken by bubble
Band makes part proportion float close to 1 suspended matter；Sewage is entered into biochemical system afterwards, it is main remove CODcr in sewage, ammonia nitrogen,
The biochemical indicators such as total phosphorus；Sewage is set to enter secondary settling tank again, the sewage being settled out filtering emission up to standard；Excess sludge enters sheet frame mistake
Filter is press-filtered out sludge outward transport together with the sludge that coagulating sedimentation generates；The pressing filtering liquid being press-filtered out enters back into oil removal regulating reservoir, weight
Multiple treatment process, until sewage filtering emission up to standard.
(5) specific implementation mode：
Embodiment 1：
One kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that by following steps group
At：
(1) level-one coagulating sedimentation：Sewage enters level-one coagulating sedimentation reaction tank by elevator pump, and addition highly basic adjustment pH is extremely
11, then every liter of sewage 250mg lime is added and removes phosphor in sewage, the mass ratio for adding highly basic and lime is 1:1, when reaction
Between 30min, using mechanical agitation, rate 80r/min；
(2) two-stage coagulation precipitates：Step (1) water outlet is entered in two-stage coagulation precipitation reaction pond, every liter of sewage addition
80mg lime, PAC, the reaction time 30min of every liter of sewage addition 80mg, using mechanical agitation, rate 80r/min；
(3) biochemical system：Step (2) water outlet is entered into biochemical system, after removing SS, COD, BOD, total phosphor contaminant,
Again by biochemical system catalytic oxidation, sedimentation in secondary sedimentation tank, SS, COD, BOD in waste water are further removed；
(4) three heavy ponds：Step (3) water outlet is entered into three heavy ponds, every liter of sewage adds 30mgPAC, reaction time 30min,
Using mechanical agitation, rate 80r/min；
(5) filtration system：Step (4) water outlet is filtered discharge, excess sludge enters plate and frame filter press and is filtered
Sludge is transported outward afterwards.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 60%NaOH solution that highly basic, which is mass fraction, in.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 80mg/L, instantaneous water≤200m that water inlet is phosphorous in3/ h is discharged phosphorous ＜ 5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(2) inlet flow-patterm is 10 in, instantaneous water≤200m3/ h is discharged phosphorous ＜ 1.5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(3) instantaneous water≤200m in3/ h is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.8mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(4) inlet flow-patterm is 8.0 in, is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.5mg/L.
Embodiment 2：
One kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that by following steps group
At：
(1) level-one coagulating sedimentation：Sewage enters level-one coagulating sedimentation reaction tank by elevator pump, and addition highly basic adjustment pH is extremely
10, then every liter of sewage 200mg lime is added and removes phosphor in sewage, the mass ratio for adding highly basic and lime is 0.7:1, reaction
Time 20min, using mechanical agitation, rate 60r/min；
(2) two-stage coagulation precipitates：Step (1) water outlet is entered in two-stage coagulation precipitation reaction pond, every liter of sewage addition
65mg lime, PAC, the reaction time 20min of every liter of sewage addition 65mg, using mechanical agitation, rate 60r/min；
(3) biochemical system：Step (2) water outlet is entered into biochemical system, after removing SS, COD, BOD, total phosphor contaminant,
Again by biochemical system catalytic oxidation, sedimentation in secondary sedimentation tank, SS, COD, BOD in waste water are further removed；
(4) three heavy ponds：Step (3) water outlet is entered into three heavy ponds, every liter of sewage adds 25mgPAC, reaction time 20min,
Using mechanical agitation, rate 60r/min；
(5) filtration system：Step (4) water outlet is filtered discharge, excess sludge enters plate and frame filter press and is filtered
Sludge is transported outward afterwards.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 32%NaOH solution that highly basic, which is mass fraction, in.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 60mg/L, instantaneous water≤200m that water inlet is phosphorous in3/ h is discharged phosphorous ＜ 5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(2) inlet flow-patterm is 9 in, instantaneous water≤200m3/ h is discharged phosphorous ＜ 1.5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(3) instantaneous water≤200m in3/ h is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.8mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(4) inlet flow-patterm is 7 in, is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.5mg/L.
Embodiment 3：
One kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that by following steps group
At：
(1) level-one coagulating sedimentation：Sewage enters level-one coagulating sedimentation reaction tank by elevator pump, and addition highly basic adjustment pH is extremely
9, then every liter of sewage 150mg lime is added and removes phosphor in sewage, the mass ratio for adding highly basic and lime is 1.5:1, reaction
Time 10min, using mechanical agitation, rate 70r/min；
(2) two-stage coagulation precipitates：Step (1) water outlet is entered in two-stage coagulation precipitation reaction pond, every liter of sewage addition
50mg lime, PAC, the reaction time 10min of every liter of sewage addition 50mg, using mechanical agitation, rate 70r/min；
(3) biochemical system：Step (2) water outlet is entered into biochemical system, after removing SS, COD, BOD, total phosphor contaminant,
Again by biochemical system catalytic oxidation, sedimentation in secondary sedimentation tank, SS, COD, BOD in waste water are further removed；
(4) three heavy ponds：Step (3) water outlet is entered into three heavy ponds, every liter of sewage adds 20mgPAC, reaction time 10min,
Using mechanical agitation, rate 70r/min；
(5) filtration system：Step (4) water outlet is filtered discharge, excess sludge enters plate and frame filter press and is filtered
Sludge is transported outward afterwards.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 40%NaOH solution and 40%KOH liquor capacities ratio 1 that highly basic, which is mass fraction, in:1.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(1) it is 40mg/L, instantaneous water≤200m that water inlet is phosphorous in3/ h is discharged phosphorous ＜ 5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(2) inlet flow-patterm is 9.5 in, instantaneous water≤200m3/ h is discharged phosphorous ＜ 1.5mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(3) instantaneous water≤200m in3/ h is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.8mg/L.
Above-mentioned described one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that step
(4) inlet flow-patterm is 7.5 in, is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.5mg/L.
Claims (6)
1. one kind reducing sludge yield sewage treatment process for oil processing industry, it is characterised in that comprise the steps of：
(1) level-one coagulating sedimentation：Sewage enters level-one coagulating sedimentation reaction tank by elevator pump, and addition highly basic adjustment pH to 9~
11, then every liter of sewage 150~250mg lime is added and removes phosphor in sewage, the mass ratio for adding highly basic and lime is (0.5
~1.5):1,10~30min of reaction time, using mechanical agitation, 60~80r/min of rate；
(2) two-stage coagulation precipitates：Step (1) water outlet is entered in two-stage coagulation precipitation reaction pond, every liter of sewage addition 50~
80mg lime, every liter of sewage add PAC, the 10~30min of reaction time of 50~80mg, using mechanical agitation, rate 60~
80r/min；
(3) biochemical system：Step (2) water outlet is entered into biochemical system, after removing SS, COD, BOD, total phosphor contaminant, then is led to
Biochemical system catalytic oxidation, sedimentation in secondary sedimentation tank are crossed, SS, COD, BOD in waste water are further removed；
(4) three heavy ponds：Step (3) is discharged and enters three heavy ponds, every liter of sewage 20~30mgPAC of addition, the reaction time 10~
30min, using mechanical agitation, 60~80r/min of rate；
(5) filtration system：Step (4) water outlet is filtered discharge, excess sludge enters after plate and frame filter press is filtered will
Sludge is transported outward.
2. one kind described in claim 1 reduces sludge yield sewage treatment process, feature for oil processing industry
It is 32%~60%NaOH solution or KOH solution one or two arbitrary volume ratio to be in step (1) that highly basic is mass fraction
Combination.
3. one kind described in claim 1 reduces sludge yield sewage treatment process, feature for oil processing industry
It is 30~80mg/L to be in step (1) that water inlet is phosphorous, instantaneous water≤200m3/ h is discharged phosphorous ＜ 5mg/L.
4. one kind described in claim 1 reduces sludge yield sewage treatment process, feature for oil processing industry
It is in step (2) that inlet flow-patterm is 9~10, instantaneous water≤200m3/ h is discharged phosphorous ＜ 1.5mg/L.
5. one kind described in claim 1 reduces sludge yield sewage treatment process, feature for oil processing industry
It is in step (3) instantaneous water≤200m3/ h is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.8mg/L.
6. one kind described in claim 1 reduces sludge yield sewage treatment process, feature for oil processing industry
It is in step (4) that inlet flow-patterm is 7.0~8.0, is discharged SS ＜ 10mg/L, is discharged phosphorous ＜ 0.5mg/L.
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| CN201710095646.6A CN108455784A (en) | 2017-02-22 | 2017-02-22 | One kind reducing sludge yield sewage treatment process for oil processing industry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174435A (en) * | 2020-09-30 | 2021-01-05 | 岳阳林纸股份有限公司新港天岳环保分公司 | Grease wastewater treatment method and treatment system |
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| CN112174435A (en) * | 2020-09-30 | 2021-01-05 | 岳阳林纸股份有限公司新港天岳环保分公司 | Grease wastewater treatment method and treatment system |
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Application publication date: 20180828 |