CN104591463A - Method for treating preserved vegetable production wastewater - Google Patents

Method for treating preserved vegetable production wastewater Download PDF

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Publication number
CN104591463A
CN104591463A CN201510024598.2A CN201510024598A CN104591463A CN 104591463 A CN104591463 A CN 104591463A CN 201510024598 A CN201510024598 A CN 201510024598A CN 104591463 A CN104591463 A CN 104591463A
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water
waste water
enters
basin
flocculation
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CN104591463B (en
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龚全知
徐璐璐
焦洋
龚波
李小明
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Chongqing Zhongkang Environmental Protection Technology Co.,Ltd.
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Green Environmental Protection Development In Science And Technology Of Chongqing China LLC
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The invention discloses a method for treating preserved vegetable production wastewater. The method comprises the steps of collecting tank water quality regulation, pressurized dissolved air flotation, alkali reaction tank water quality tracking regulation, chemical oxidation deodorization and COD (chemical oxygen demand) substance removal, flocculation sedimentation, intermediate clean water collection, active carbon adsorption and MVR evaporation. According to characteristics of the preserved vegetable wastewater, on the premise of ensuring that the effluent reaches standards, the one-time investment and the running cost are reduced, the quality is stable and reliable, the operation management is flexible and convenient, and the maintenance cost is low, so that on the one hand, excess sludge is reduced as much as possible, and noise is effectively controlled to avoid secondary pollution; and on the other hand, the regulation can be performed easily along with changes of the water quality, the operation is simple and convenient, the adaptability is strong, energy is saved, consumption is reduced, and pollution zero emission can be truly realized.

Description

Hot pickled mustard tube production wastewater treatment method
Technical field
The invention belongs to waste water treatment process technical field, specifically, particularly relate to a kind for the treatment of process of hot pickled mustard tube factory effluent.
Background technology
Along with the fast development of reservoir area of Three Gorges economy, the industrial scale of its mainstay industry hot pickled mustard tube is increasing, every year will to the undressed high salt height nitrogen phosphorus organic wastewater of reservoir area of Three Gorges discharge about 500 ten thousand steres in its production process, namely the pollutent organism (in COD) entering reservoir is every year 2,225 ten thousand tons, 800,000 tons, nitrogen and 130,000 tons, phosphorus, forms serious threat to Water Environment of Three Gorges.The waste water salinity that hot pickled mustard tube industry produces is up to 2% ~ 15%, and organic contamination substrate concentration is up to 3 ~ 20g/L, and concentration of suspension up to 7g/L, and has very high concentration of nitrogen and phosphorus.High salt preserved szechuan pickle waste water has restraining effect to microorganism active, causes microorganism in the settleability of traditional biological process active sludge variation, bio-reactor to be difficult to assemble, therefore, adopts traditional biological facture to process preserved szechuan pickle waste water and has larger difficulty.So the sewage disposal technology developing a kind of applicable process high salt height nitrogen preserved szechuan pickle waste water pollutes solution reservoir area of Three Gorges hot pickled mustard tube sewage discharge and is significant.The comprehensive wastewater pickling waste water produced in hot pickled mustard tube production process has high salt, high nitrogen, high organic feature, because salinity has obvious restraining effect to normal biological treatment, such waste water is made to become difficult point, brine waste refers to the waste water containing high density solvability inorganic salt, except containing except organic pollution materials in brine waste, also containing a large amount of inorganic salt, CI -, SO 4 2-, Na +, Ca 2+ion etc.
The improvement discharge of high salinity waste water, report according to relevant research both at home and abroad, what immediate development was got up mainly contains biology and physics, materialization combination process, electrochemistry and membrane processing method etc. to the treatment process of high salinity waste water.
Inorganic salts plays promotion enzyme reaction in microorganism growth process, maintains the vital role of membrane equilibrium and adjustment osmotic pressure.But salt concn is too high, can produce restraining effect to microbial growth, the main reason that suppresses is:
(1) when salt concn is too high, osmotic pressure is high, microorganism cells is dewatered and causes cellular plasm to be separated.
(2) because of salting out, dehydrogenase activity is reduced in high saliferous situation.
(3) high Cl-concentration is to the toxic effect of bacterium.
(4) because the density of water increases, active sludge easily floats loss.
For this reason, the biological treatment of high slat-containing wastewater needs to dilute, and usually under low salt concn (salt concn is less than 1% operation), causes the waste of water resources, and treatment facility is huge, investment increases, and working cost improves.
Also someone studies biological method process high slat-containing wastewater, only has when microorganism is after the cultivation domestication process of complexity, could produce the bacterial classification adapting to high salt, to tolerate certain salt concn.But along with the change of salt concn in water quality, also the osmotic balance in bacterium cell can be caused to lack of proper care, thus propose harsher operational conditions to biological treatment, simultaneously its treatment effect not obvious, and processing cost is higher, require also higher to the corrosion resistant of equipment, and then improve corresponding investment and running cost, this be vast manufacturing enterprise be difficult to accept the fact, urgently effective ways are replaced solving practical problems.
The chemical substance treatment technology of high salinity waste water compares shortcoming at present, have and make electrochemically to carry out correlative study to it, but unit consumption of energy is higher, is unfavorable for practice.Simultaneously because water quality high content of salt is also higher to the material requirements of equipment, the waste gas of its conductivity and generation is also numerous practical challenges needing to consider.
In current process for treating high-salinity wastewater, the most often use conventional physical method, such as Exposure to Sunlight technique, but the impact of climate and temperature is excessive, it is vast in territory to add China, climate resources skewness, changes the feature such as large and makes it be unfavorable for extensive popularization.Or the techniques such as condensation evaporation, but effect is poor, equipment residue reclaims difficulty or capacity usage ratio is not high.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of method can carrying out harmless treatment to high salt, high nitrogen, high organism preserved szechuan pickle waste water.
Technical solution of the present invention is as follows: a kind of hot pickled mustard tube production wastewater treatment method, comprises the following steps:
1) hot pickled mustard tube factory effluent enters in water collecting basin, removes the suspended substance in waste water by aeration, adds alkali lye simultaneously, the pH value of waste water is adjusted to 6.5-7.5 in waste water, then removes the settleable matter in waste water;
2) the waste water suction air flotation pool after utilizing water pump to be precipitated by water collecting basin, adds PAC solution or PAM solution, the pH value of waste water in air flotation pool is adjusted to 7-8 in air flotation pool, and recycling pressurized dissolved air flotation removes the suspended substance in waste water further;
3) waste water after air-flotation process enters in alkali reaction pond, in alkali reaction pond, add alkali lye, and the pH value of waste water in alkali reaction pond is adjusted to 10.5-11.5, simultaneously by the heavy metal substance in aeration removal waste water and volatile material;
4) waste water after alkali reaction enters oxidation pond, in oxidation pond, add oxidizing agent solution, by the mode of chemical oxidation while deodorizing, removes the COD material in waste water;
5) waste water after chemical oxidation enters flocculation sedimentation tank, flocculation agent is added in the front end of flocculation sedimentation tank, make suspended substance generation throwing out, PAC solution or PAM solution is added in the rear end of flocculation sedimentation tank, make the suspended substance after flocculation precipitate and realize solid-liquid separation, after being separated, the pH value of water is 7-8;
6) clear water after flocculation sediment enters middle clean water basin, collects by middle clean water basin are unified;
7) clear water in the middle of in clean water basin flows to activated carbon adsorber, removes the small suspended substance in water and the peculiar smell in water by activated carbon adsorber;
8) enter MVR vapo(u)rization system from activated carbon adsorber water out, evaporated water by MVR vapo(u)rization system, the final clear water produced enters in clean water basin to be collected.
The process that the technique that the present invention adopts " pre-treatment+chemical oxidation+MVR evaporates " to serve as theme is correlated with to the waste water that hot pickled mustard tube produces, waste water needs to carry out a series of pre-treatment measure before entering MVR vapo(u)rization system, to remove the solid, suspended substance, part COD material etc. in water.
Hot pickled mustard tube factory effluent is mainly Artesian Drainage and puts in water collecting basin, and at the bottom of the pond of water collecting basin, overlay aeration pipe network, utilize blower fan to carry out forced aeration, aeration control, at 5:1, reaches the effect of preaeration and regulating water quality.Arrange that alkali lye drug feeding pipeline is for regulating the pH value in water, makes water pH value be adjusted to about 7 simultaneously.Water collecting basin rear end arranges a preliminary sedimentation tank, to remove the settleable matter in water, alleviates the processing load of rear end air flotation pool simultaneously.
Water collecting basin water outlet is controlled the water yield by water pump and under meter, to ensure the stable and efficient of system.First water pump is utilized at the uniform velocity to be sent in air flotation pool by waste water in water collecting basin, utilize medicine system to adding PAC solution or PAM solution in air flotation pool, according to air flotation effect to air water when dissolving pressure regulate, be adjusted to observing water quantity and chemical feeding quantity after convenient pressure, on the impact of water treatment effect, to carry out reasonably regulating ensures reaction outlet effect afterwards.
Waste water after air-flotation process enters in alkali reaction pond through gravity flow, carry out tracking by alkali dosing pump and pH meter etc. to the pH value in water to regulate, controlling it keeps between 10.5-11.5, aerated conduit is laid in alkali reaction pond, gas-water ratio controls as about 5:1, to promote that part heavy metal substance in water is removed in the dissolving of alkali lye in waste water and reaction, and forced aeration is utilized to carry out stripping, oxidation to volatile substances such as the ammonia nitrogens in water.The waste gas produced in this process enters in adsorption tower and carries out deodorizing process after gas skirt is collected.
Waste water enters oxidation pond through diversion trench gravity flow, adds oxidizing agent solution, removes COD material in water by the mode of chemical oxidation, also part stink substance can be oxidized simultaneously, to reach the object of deodorizing in oxidation pond.This oxidation pond is stirrer stirring reaction, and pond domestic demand arranges a set of stainless steel whipping appts, to ensure good running and the work-ing life of system.
Water outlet gravity flow enters flocculation sedimentation tank, and this pond is set to front end and rear end, and front end is mainly through adding Al 2(SO 4) 3in acid solubilized agglutinating matter, the pH value in water quality is regulated Deng after hydrolysis, and carry out the throwing out of partial suspended thing; Rear end adds PAC solution or PAM solution more effectively, efficiently precipitates to impel suspended substance, and is able to solid-liquid separation.After water quality clarification, supernatant liquor gravity flow enters middle clean water basin, after middle clean water basin, a set of filtering adsorpting device (activated carbon adsorber) can be set, it is mainly used in removing the small suspended substance in water and the peculiar smell in water, be ensure that waste water obtains maximum pollutent minimizing before entering MVR vapo(u)rization system must obligato link.Processing power according to MVR vapo(u)rization system controls amount of inlet water by water pump, and the final clear water that system produces enters in clean water basin, can reuse also can externally discharge.
The whole preprocessing process of the present invention adopts the measures such as physical sedimentation+air supporting+chemical oxidation+Filtration Adsorption to process, to reach in degradation water the contamination indexs such as SS, COD and clarification water quality, so that enter the evaporation process of being correlated with to sewage in MVR vapo(u)rization system.The present invention have operation simple, easily regulate with change of water quality, the feature such as outlet effect is stable, the method all has the advantages such as easy and simple to handle, strong adaptability, energy-saving and cost-reducing, zero emission relative to biochemical treatment system and electrochemical treatment technique etc.
As preferably, step 3) in foul smell undertaken collecting and processing by collection and treatment device.
The mud that air flotation pool, alkali reaction pond, oxidation pond, flocculation sedimentation tank, activated carbon adsorber and MVR vapo(u)rization system produce enters sludge thickener by pipeline, mud supernatant liquor after concentrated enters water collecting basin by pipeline, base sludge carries out drying and other treatment by pressure filter or centrifuge, the sewage produced imports water collecting basin, and the dewatered sludge produced carries out fixed point and stores.Above pool bottom sludge in each structures is imported in sludge thickener through pipeline, after filter-press dehydration, sewage is got back in water collecting basin again and is processed, and dewatered sludge fixed point stores, can be transported to relevant landfill yard outward carries out banking up landfill, this further ensures that zero emission.
The each cell processing ability of the present invention and water outlet gather and see the following form:
Concentration: mg/L clearance: %
As can be known from the above table, hot pickled mustard tube factory effluent is after the method for the invention process, not only meet the related request of first discharge standard in " integrated wastewater discharge standard " (GB8978-1996) table 2, and meet in " agricultural irrigation water quality standard " (GB5084-2005) table 1 about muriatic relevant regulations.
The invention has the beneficial effects as follows:
1, according to the feature of preserved szechuan pickle waste water, the ripe advanced person of organic combination is also proven reliable and effective Processing tecchnics, is guaranteeing, under standard water discharge prerequisite, to decrease one-time investment and working cost.
2, select main body support equipment, steady quality is reliable, and operational management flexibly, conveniently, maintenance cost is low.
3, excess sludge can be reduced, effectively control noise, to avoid secondary pollution as far as possible.
4, easily regulate with change of water quality, easy and simple to handle, strong adaptability, energy-saving and cost-reducing, really can realize zero emission.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1
As shown in Figure 1, the treatment process of hot pickled mustard tube factory effluent, comprises the following steps:
1) hot pickled mustard tube factory effluent enters in water collecting basin, aeration is carried out by the aeration pipe network arranged bottom water collecting basin, remove the suspended substance in waste water, in waste water, add alkali lye simultaneously, carry out water quality regulation, the pH value of waste water is adjusted to 6.5, then in the preliminary sedimentation tank of water collecting basin rear end, removes the settleable matter in waste water by precipitation.In this step, added alkali lye is NaOH or Ca (OH) 2, concentration and the quantity of added alkali lye are determined according to actual needs, as long as can meet the requirement of water quality regulation.
2) the waste water suction air flotation pool after utilizing water pump to be precipitated by water collecting basin, by water pump and under meter, the water yield is controlled, then in air flotation pool, add PAC (polymerize aluminum chloride) solution or PAM (polyacrylamide) solution, the pH value of waste water in air flotation pool is adjusted to 7, recycling pressurized dissolved air flotation removes the suspended substance in waste water further, and SS content in effluent quality is significantly reduced.Concentration and the quantity of PAC solution or PAM solution added by this step are determined, according to actual needs as long as the adjustment that can meet pH value requires.
3) the waste water gravity flow after air-flotation process enters in alkali reaction pond, adds alkali lye and utilize pH meter to carry out tracking to the pH value in water to regulate by alkali dosing pump in alkali reaction pond, and the pH value of waste water in alkali reaction pond is adjusted to 10.5; Simultaneously, aeration is carried out by the aeration pipe network bottom alkali reaction pond, promote on the one hand the dissolving of alkali lye in waste water and reaction, remove the heavy metal substance in waste water and volatile material, on the other hand, utilize forced aeration to carry out stripping, oxidation to volatile substances such as the ammonia nitrogens in waste water, foul smell is undertaken collecting and processing by collection and treatment device.In this step, added alkali lye is NaOH or Ca (OH) 2, concentration and the quantity of added alkali lye are determined according to actual needs, as long as can meet the requirement of water quality regulation.
4) waste water after alkali reaction enters oxidation pond through diversion trench gravity flow, adds oxidizing agent solution, removed the COD material in waste water by the mode of chemical oxidation in oxidation pond; , part stink substance can also be oxidized, to reach the object of deodorizing meanwhile.Oxygenant can select hydrogen peroxide, Peracetic Acid, clorox, SPC-D, bromine, iodine etc., concrete selects any and consumption to determine according to actual needs.
5) the waste water gravity flow after chemical oxidation enters flocculation sedimentation tank, adds flocculation agent, make suspended substance generation throwing out in the front end of flocculation sedimentation tank; Add PAC solution or PAM solution in the rear end of flocculation sedimentation tank, the suspended substance after making flocculation on the one hand precipitates and realizes solid-liquid separation, and play regulating water quality on the other hand, after making separation, the pH value of water is 7.In this step, added flocculation agent is industrial aluminum sulphate or polymerize aluminum chloride, and the consumption of flocculation agent, PAC/PAM solution is determined according to practical situation.
6) the clear water gravity flow after flocculation sediment enters middle clean water basin, collect by middle clean water basin are unified, middle clean water basin, as the water inlet pond of MVR vapo(u)rization system, also have the effect of the buffering water yield simultaneously, for MVR vapo(u)rization system is continuous, safe operation provides prerequisite.
7) clear water in the middle of in clean water basin to activated carbon adsorber, impels pollutent in water to be retained, adsorb by current flowing at the flows by action of water pump, thus the small suspended substance removed in water and the peculiar smell in water.
8) pump into MVR vapo(u)rization system from activated carbon adsorber water out by water pump, evaporated water by MVR vapo(u)rization system, the final clear water produced enters in clean water basin to be collected.
In above treating processes, by arranging that submersible sewage pump or air lift pipeline are discharged mud bottom preliminary sedimentation tank, mud enters sludge thickener by pipeline; The mud that air flotation pool, alkali reaction pond, oxidation pond, flocculation sedimentation tank, activated carbon adsorber and MVR vapo(u)rization system produce all enters sludge thickener by pipeline.Mud supernatant liquor after concentrated enters water collecting basin by pipeline, base sludge carries out drying and other treatment by pressure filter or centrifuge, the sewage produced imports water collecting basin, and the dewatered sludge produced carries out fixed point and stores, and is transported to relevant landfill yard and carries out process of banking up outside needing.
Embodiment 2
As shown in Figure 1, the treatment process of hot pickled mustard tube factory effluent, comprises the following steps:
1) hot pickled mustard tube factory effluent enters in water collecting basin, aeration is carried out by the aeration pipe network arranged bottom water collecting basin, remove the suspended substance in waste water, in waste water, add alkali lye simultaneously, carry out water quality regulation, the pH value of waste water is adjusted to 7, then in the preliminary sedimentation tank of water collecting basin rear end, removes the settleable matter in waste water by precipitation.In this step, added alkali lye is NaOH or Ca (OH) 2, concentration and the quantity of added alkali lye are determined according to actual needs, as long as can meet the requirement of water quality regulation.
2) the waste water suction air flotation pool after utilizing water pump to be precipitated by water collecting basin, by water pump and under meter, the water yield is controlled, then in air flotation pool, add PAC (polymerize aluminum chloride) solution or PAM (polyacrylamide) solution, the pH value of waste water in air flotation pool is adjusted to 7.5, recycling pressurized dissolved air flotation removes the suspended substance in waste water further, and SS content in effluent quality is significantly reduced.Concentration and the quantity of PAC solution or PAM solution added by this step are determined, according to actual needs as long as the adjustment that can meet pH value requires.
3) the waste water gravity flow after air-flotation process enters in alkali reaction pond, adds alkali lye and utilize pH meter to carry out tracking to the pH value in water to regulate by alkali dosing pump in alkali reaction pond, and the pH value of waste water in alkali reaction pond is adjusted to 11; Simultaneously, aeration is carried out by the aeration pipe network bottom alkali reaction pond, promote on the one hand the dissolving of alkali lye in waste water and reaction, remove the heavy metal substance in waste water and volatile material, on the other hand, utilize forced aeration to carry out stripping, oxidation to volatile substances such as the ammonia nitrogens in waste water, foul smell is undertaken collecting and processing by collection and treatment device.In this step, added alkali lye is NaOH or Ca (OH) 2, concentration and the quantity of added alkali lye are determined according to actual needs, as long as can meet the requirement of water quality regulation.
4) waste water after alkali reaction enters oxidation pond through diversion trench gravity flow, adds oxidizing agent solution, removed the COD material in waste water by the mode of chemical oxidation in oxidation pond; , part stink substance can also be oxidized, to reach the object of deodorizing meanwhile.Oxygenant can select hydrogen peroxide, Peracetic Acid, clorox, SPC-D, bromine, iodine etc., concrete selects any and consumption to determine according to actual needs.
5) the waste water gravity flow after chemical oxidation enters flocculation sedimentation tank, adds flocculation agent, make suspended substance generation throwing out in the front end of flocculation sedimentation tank; Add PAC solution or PAM solution in the rear end of flocculation sedimentation tank, the suspended substance after making flocculation on the one hand precipitates and realizes solid-liquid separation, and play regulating water quality on the other hand, after making separation, the pH value of water is 7.5.In this step, added flocculation agent is industrial aluminum sulphate or polymerize aluminum chloride, and the consumption of flocculation agent, PAC/PAM solution is determined according to practical situation.
6) the clear water gravity flow after flocculation sediment enters middle clean water basin, collect by middle clean water basin are unified, middle clean water basin, as the water inlet pond of MVR vapo(u)rization system, also have the effect of the buffering water yield simultaneously, for MVR vapo(u)rization system is continuous, safe operation provides prerequisite.
7) clear water in the middle of in clean water basin to activated carbon adsorber, impels pollutent in water to be retained, adsorb by current flowing at the flows by action of water pump, thus the small suspended substance removed in water and the peculiar smell in water.
8) pump into MVR vapo(u)rization system from activated carbon adsorber water out by water pump, evaporated water by MVR vapo(u)rization system, the final clear water produced enters in clean water basin to be collected.
The disposal options of the present embodiment mud is identical with embodiment 1, and therefore not to repeat here.
Embodiment 3
As shown in Figure 1, the treatment process of hot pickled mustard tube factory effluent, comprises the following steps:
1) hot pickled mustard tube factory effluent enters in water collecting basin, aeration is carried out by the aeration pipe network arranged bottom water collecting basin, remove the suspended substance in waste water, in waste water, add alkali lye simultaneously, carry out water quality regulation, the pH value of waste water is adjusted to 7.5, then in the preliminary sedimentation tank of water collecting basin rear end, removes the settleable matter in waste water by precipitation.In this step, added alkali lye is NaOH or Ca (OH) 2, concentration and the quantity of added alkali lye are determined according to actual needs, as long as can meet the requirement of water quality regulation.
2) the waste water suction air flotation pool after utilizing water pump to be precipitated by water collecting basin, by water pump and under meter, the water yield is controlled, then in air flotation pool, add PAC (polymerize aluminum chloride) solution or PAM (polyacrylamide) solution, the pH value of waste water in air flotation pool is adjusted to 8, recycling pressurized dissolved air flotation removes the suspended substance in waste water further, and SS content in effluent quality is significantly reduced.Concentration and the quantity of PAC solution or PAM solution added by this step are determined, according to actual needs as long as the adjustment that can meet pH value requires.
3) the waste water gravity flow after air-flotation process enters in alkali reaction pond, adds alkali lye and utilize pH meter to carry out tracking to the pH value in water to regulate by alkali dosing pump in alkali reaction pond, and the pH value of waste water in alkali reaction pond is adjusted to 11.5; Simultaneously, aeration is carried out by the aeration pipe network bottom alkali reaction pond, promote on the one hand the dissolving of alkali lye in waste water and reaction, remove the heavy metal substance in waste water and volatile material, on the other hand, utilize forced aeration to carry out stripping, oxidation to volatile substances such as the ammonia nitrogens in waste water, foul smell is undertaken collecting and processing by collection and treatment device.In this step, added alkali lye is NaOH or Ca (OH) 2, concentration and the quantity of added alkali lye are determined according to actual needs, as long as can meet the requirement of water quality regulation.
4) waste water after alkali reaction enters oxidation pond through diversion trench gravity flow, adds oxidizing agent solution, removed the COD material in waste water by the mode of chemical oxidation in oxidation pond; , part stink substance can also be oxidized, to reach the object of deodorizing meanwhile.Oxygenant can select hydrogen peroxide, Peracetic Acid, clorox, SPC-D, bromine, iodine etc., concrete selects any and consumption to determine according to actual needs.
5) the waste water gravity flow after chemical oxidation enters flocculation sedimentation tank, adds flocculation agent, make suspended substance generation throwing out in the front end of flocculation sedimentation tank; Add PAC solution or PAM solution in the rear end of flocculation sedimentation tank, the suspended substance after making flocculation on the one hand precipitates and realizes solid-liquid separation, and play regulating water quality on the other hand, after making separation, the pH value of water is 8.In this step, added flocculation agent is industrial aluminum sulphate or polymerize aluminum chloride, and the consumption of flocculation agent, PAC/PAM solution is determined according to practical situation.
6) the clear water gravity flow after flocculation sediment enters middle clean water basin, collect by middle clean water basin are unified, middle clean water basin, as the water inlet pond of MVR vapo(u)rization system, also have the effect of the buffering water yield simultaneously, for MVR vapo(u)rization system is continuous, safe operation provides prerequisite.
7) clear water in the middle of in clean water basin to activated carbon adsorber, impels pollutent in water to be retained, adsorb by current flowing at the flows by action of water pump, thus the small suspended substance removed in water and the peculiar smell in water.
8) pump into MVR vapo(u)rization system from activated carbon adsorber water out by water pump, evaporated water by MVR vapo(u)rization system, the final clear water produced enters in clean water basin to be collected.
The disposal options of the present embodiment mud is identical with embodiment 1, and therefore not to repeat here.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (3)

1. a hot pickled mustard tube production wastewater treatment method, is characterized in that comprising the following steps:
1) hot pickled mustard tube factory effluent enters in water collecting basin, removes the suspended substance in waste water by aeration, adds alkali lye simultaneously, the pH value of waste water is adjusted to 6.5-7.5 in waste water, then removes the settleable matter in waste water;
2) the waste water suction air flotation pool after utilizing water pump to be precipitated by water collecting basin, adds PAC solution or PAM solution, the pH value of waste water in air flotation pool is adjusted to 7-8 in air flotation pool, and recycling pressurized dissolved air flotation removes the suspended substance in waste water further;
3) waste water after air-flotation process enters in alkali reaction pond, in alkali reaction pond, add alkali lye, and the pH value of waste water in alkali reaction pond is adjusted to 10.5-11.5, simultaneously by the heavy metal substance in aeration removal waste water and volatile material;
4) waste water after alkali reaction enters oxidation pond, in oxidation pond, add oxidizing agent solution, by the mode of chemical oxidation while deodorizing, removes the COD material in waste water;
5) waste water after chemical oxidation enters flocculation sedimentation tank, flocculation agent is added in the front end of flocculation sedimentation tank, make suspended substance generation throwing out, PAC solution or PAM solution is added in the rear end of flocculation sedimentation tank, make the suspended substance after flocculation precipitate and realize solid-liquid separation, after being separated, the pH value of water is 7-8;
6) clear water after flocculation sediment enters middle clean water basin, collects by middle clean water basin are unified;
7) clear water in the middle of in clean water basin flows to activated carbon adsorber, removes the small suspended substance in water and the peculiar smell in water by activated carbon adsorber;
8) enter MVR vapo(u)rization system from activated carbon adsorber water out, evaporated water by MVR vapo(u)rization system, the final clear water produced enters in clean water basin to be collected.
2. hot pickled mustard tube production wastewater treatment method according to claim 1, is characterized in that: step 3) in foul smell undertaken collecting and processing by collection and treatment device.
3. hot pickled mustard tube production wastewater treatment method according to claim 1 and 2, it is characterized in that: the mud that air flotation pool, alkali reaction pond, oxidation pond, flocculation sedimentation tank, activated carbon adsorber and MVR vapo(u)rization system produce enters sludge thickener by pipeline, mud supernatant liquor after concentrated enters water collecting basin by pipeline, base sludge carries out drying and other treatment by pressure filter or centrifuge, the sewage produced imports water collecting basin, and the dewatered sludge produced carries out fixed point and stores.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN105984978A (en) * 2016-05-12 2016-10-05 浙江海洋大学 Treatment process of aquatic product processing waste water
CN105984978B (en) * 2016-05-12 2019-05-14 浙江海洋大学 A kind for the treatment of process of wastewater from aquatic product process
CN106430808A (en) * 2016-08-05 2017-02-22 广东环院环境工程有限公司 Treatment process of wet blue leather processing wastewater
CN106430808B (en) * 2016-08-05 2019-04-05 广东环院环境工程有限公司 A kind of wet blue leather processing wastewater treatment process
CN110316860A (en) * 2019-06-20 2019-10-11 兰州兰汇环境科技有限公司 The processing method of one main laver processing waste water
CN111807609A (en) * 2020-06-18 2020-10-23 陆良中金环保科技有限公司 Method for treating vegetable leaf/fruit and vegetable garbage waste water biogas slurry
CN112062375A (en) * 2020-09-09 2020-12-11 青岛伊西欧普节能新技术有限公司 Evaporation and crystallization integrated treatment device for pickle wastewater
CN113912251A (en) * 2021-12-14 2022-01-11 杰瑞环境工程技术有限公司 Treatment process of high-concentration degradation-resistant pickling wastewater

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