CN103086575A - Deep treatment system and method for garlic processing wastewater - Google Patents
Deep treatment system and method for garlic processing wastewater Download PDFInfo
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- CN103086575A CN103086575A CN2013100615552A CN201310061555A CN103086575A CN 103086575 A CN103086575 A CN 103086575A CN 2013100615552 A CN2013100615552 A CN 2013100615552A CN 201310061555 A CN201310061555 A CN 201310061555A CN 103086575 A CN103086575 A CN 103086575A
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Abstract
The invention provides a deep treatment system and method for garlic processing wastewater. The invention is characterized in that the deep treatment system for garlic processing wastewater comprises a grid sedimentation tank, a pretreatment apparatus, a biological treatment apparatus and a composite biofiltration apparatus, wherein all the units are connected through pipelines; pretreatment is performed through the synergistic action of iron-carbon filler microelectrolysis and Fenton strong oxidation, and the cost is saved; biological treatment is performed by adopting a contact oxidation method; composite biofiltration is performed by using a biocarbon and biozeolite composite filter material; and after garlic processing wastewater is sequentially treated by the units, the COD (chemical oxygen demand), ammonia nitrogen and SS (suspended sediment) of effluent water are respectively 41.3-45.5mg/L, 1.7-3.1mg/L and 5-7mg/L, thus ensuring that the effluent water meets the water quality requirements for sewage reclaimed non-drinking water. The invention is favorable in wastewater treatment effect, low in sludge yield, low in operating cost, small in occupied area and convenient to operate and manage.
Description
Technical field
The present invention relates to garlic processing waste water improvement method, belong to the technical field of sewage disposal, specifically a kind of garlic processing waste water advanced treatment system and method.
Background technology
The finished product garlic produces the garlic processing waste water because of needs cleaning, decortication, section etc. in the course of processing, because garlic contains protein, carbohydrate, reducing sugar, robust fibre etc., therefore the garlic wastewater organic content is high, COD, ammonia nitrogen index are high, stink is large, and be acid, serious to environmental hazard, must be administered.
At first the difficult point that garlic wastewater is administered is to contain garlicin in waste water, garlicin be garlic in the course of processing because the effect of large allinase produces, garlicin not still waste water produce the root of stink, the more important thing is that garlicin is to the toxic and restraining effect of microorganism in biological treatment, next is that larger molecular organics content is high-leveled and difficult directly to be utilized by microorganism, cause long by the ordinary method treatment scheme, cost is high, treatment effect is undesirable.
Summary of the invention
The present invention is the problem existed for solving prior art, and a kind of garlic processing waste water advanced treatment system and method are provided, and pretreating effect is good, sludge yield is few, and working cost is low, and floor space is little, convenient operation and management, further reduce the indexs such as COD and ammonia nitrogen and reach the reuse requirement.
The present invention is achieved through the following technical solutions: a kind of garlic processing waste water advanced treatment system, it is characterized in that, the unit set gradually is: grid settling pit, pre-processing device, biological treating equipment, compound bio filter plant, described each unit connects by pipeline.
To improvement of the technical scheme: described grid settling pit arranges water inlet pipe, the tilted mechanical grille that arranges of described grid settling pit, and described grid settling pit bottom arranges bucket;
Described pre-processing device comprises iron carbon filler, dividing plate and the baffle plate in the uncovered housing in upper end, housing, described dividing plate will be divided into left and right two portions in housing, described iron carbon filler is arranged on the mid-way in left side in housing, described baffle plate vertically is arranged on the upper part on right side in housing, in the left side of described baffle plate, whipping appts is set; Pre-processing device also configures and adds hydrogen peroxide unit and sodium hydroxide device, and pre-processing device also configures the device that adds the device of hydrogen peroxide to described housing internal partition left side and add sodium hydroxide to described housing internal partition right side;
Described biological treating equipment comprises life assemblage filler, aerator, dividing plate and the baffle plate in the uncovered housing in upper end, housing, described dividing plate will be divided into biochemical zone and settling region in housing, the upper end of described dividing plate is lower than uncovered edge, the upper end of described housing, described life assemblage filler is arranged on the mid-way of biochemical zone in housing, described aerator is set below described life assemblage filler, and described baffle plate vertically arranges upper part of settling region in housing;
Described compound bio filter plant comprises composite filtering material, the aerator in the uncovered housing in upper end, housing, and described composite filtering material is arranged on mid-way in housing, and described aerator is set below described composite filtering material; Described compound bio filter plant housing sidewall top sets out water pipe;
Described grid settling pit top sets out the mouth of a river and is communicated with the water-in that described pre-processing device lower housing portion arranges by the first pipeline, on described the first pipeline, the first water pump is set; The water outlet that described pre-processing device housing top arranges is communicated with the water-in that described biological treating equipment housing top arranges by the second pipeline; The water outlet that described biological treating equipment housing top arranges is communicated with the water-in that described compound bio filter plant lower housing portion arranges by the 3rd pipeline, on described the 3rd pipeline, the second water pump is set.
Technique scheme is further improved: the ventpipe that the aerator in described biological treating equipment and the aerator in described compound bio filter plant connect is upwards drawn with same gas blower and is connected from its equipment bottom respectively.
Technique scheme is further improved: the life assemblage filler in described biological treating equipment housing is divided into left and right two portions by a central dividing plate vertically arranged, described central dividing plate upper end is concordant with biological treating equipment housing upper end, and gap is left in central dividing plate lower end and biological treating equipment housing bottom surface.
Technique scheme is further improved: described composite filtering material is charcoal and biozeolite.Technique scheme is further improved: the grid gap of described mechanical grille is 4-6mm.
A kind of garlic processing waste water deep treatment method, is characterized in that, adopts above-mentioned garlic processing waste water advanced treatment system to carry out advanced treatment to the garlic processing waste water, and treatment process is as follows:
(1) grid sand setting: at first the garlic processing waste water enters the grid settling pit, by the mechanical grille in the grid settling pit remove in the garlic course of processing, produce as large floating matter and suspended substances such as garlic skins, the inorganics that bucket precipitation removal silt particle in process grid settling pit and proportion are greater than water is 50-70 minute in the grid settling pit residence time;
(2) pre-treatment: the water after the grid sand setting enters pre-processing device, be introduced into the dividing plate left side process iron carbon filler in housing, because garlic wastewater is acid, utilize the iron carbon under acidic conditions to form some microbatterys, H atom and the ferrous ion of the status nascendi that the microbattery reaction produces, there is very high chemically reactive, the organism in the garlic processing waste water of can effectively degrading; Add hydrogen peroxide by the device that adds hydrogen peroxide, the ferrous ion that utilizes hydrogen peroxide to react generation with iron carbon microbattery forms Fenton reagent, the hydroxyl radical free radical that Fenton reagent produces has extremely strong oxygenizement, the pollutent in can oxidation garlic processing waste water; Simultaneously, the formation of Fenton reagent has micro-electrolytic action of promotion, and in addition, hydrogen peroxide itself also has oxygenizement; The result of above-mentioned multiple action, make COD and ammonia nitrogen in the pre-treatment water outlet greatly reduce, effectively decompose the garlicin in the garlic processing waste water, and be small molecules by the material decomposition of the macromole in the garlic processing waste water and bio-refractory, be beneficial to microbiological deterioration, now waste water is acid, then enter the dividing plate right side in housing, add sodium hydroxide solution by the device that adds sodium hydroxide and adjust pH to 8-8.5, for subsequent biological treatment provides control environment, simultaneously, under alkaline condition, remaining ferrous ion becomes ferric ion and forms Fe (OH)
3, Fe (OH)
3good flocculation agent, can be by the material that is colloidal in water by compression double electric layer, reduce zeta-potential and by broken steady, produce precipitation and remove; The residence time of waste water is 5-7 hour, and the hydrogen peroxide consumption is 3.0-3.5mL/L;
(3) biological treatment: biochemical zone and settling region are set, biochemical zone adopts biological contact oxidation process, cultivate microbial film is arranged on life assemblage filler in biological treating equipment, pretreated water enters biological treating equipment, be introduced into biochemical zone, microbial film on the life assemblage filler under aerobic condition to the organism in water adsorbed, oxidative degradation, the microbial film that simultaneously comes off has biological flocculation, and the impurity in water is swept along after flocculation and entered the settling region precipitation and remove; The residence time of waste water is 14-16 hour, and DO is 3-3.5mg/L;
(4) compound bio filters: the composite filtering material in compound bio filter plant housing is charcoal and biozeolite, water through biological treatment enters the compound bio filter plant, contain remaining organism, inorganics impurity in water outlet after biological treatment, adsorption by biomembranous biological oxidation, charcoal itself on charcoal and biozeolite, and the filtration crown_interception between the composite filtering material fine particle is removed organism, inorganics impurity further reduces COD and SS, absorption and ion exchange by biozeolite further reduce ammonia nitrogen; Gas-water ratio in compound bio filter plant housing is 4:1-6:1, particle diameter of filter medium 2-4mm, and the residence time is 2-2.5 hour, after the compound bio filtration treatment, main effluent index can reach reuse of wastewater miscellaneous water water quality requirement.
To further improvement in the technical proposal: the garlic processing waste water successively after grid settling pit, pre-processing device, biological treating equipment, compound bio filter plant are processed, COD, ammonia nitrogen, SS the accumulative removal rate be respectively 99.6%, 92.4-94%, 98.5-98.6%.
The present invention has the following advantages and positively effect:
(1) pretreatment unit adopts the countless microbattery reactions of the spontaneous formation of iron carbon filler, utilizes the microbattery reaction to produce and has very high chemically active status nascendi H atom and ferrous ion degradation of organic substances, does not need to consume electric energy.Adding ferrous ion in hydrogen peroxide and microbattery reaction product forms Fenton reagent and produces the hydroxyl radical free radical with extremely strong oxidation capacity the pollutent in sewage is degraded, hydrogen peroxide itself also has oxygenizement, simultaneously, the formation of Fenton reagent can promote the carrying out of iron carbon microbattery reaction.After pH adjusts, under alkaline condition, remaining ferrous ion becomes ferric ion and forms Fe (OH)
3, Fe (OH)
3good flocculation agent, can be by the material that is colloidal in water by compression double electric layer, reduce zeta-potential and by broken steady, produce precipitation and remove.Therefore, multiple action makes pre-treatment efficiency high, and the clearance of COD, ammonia nitrogen, SS can reach 88.8-89.2%, 72.1-75.8%, 60-63%, has greatly alleviated the burden of subsequent disposal.
In addition, save in Fenton reagent and need to add the reagent consumption expense that ferrous ion brings, do not need to add flocculation agent and can produce precipitation, save the trouble of the investment cost, running cost and the maintenance of the equipment that add flocculation agent and bring.
(2) adopt the main body of biological contact oxidation process as biological processing unit, have biomass large, microbe species is many, participates in again the Metabolic activity of microorganism because processing the iron ion of bringing into early stage, having improved the biological speed of growth reaches organic degradation rate, organic concentration reduces greatly, and the clearance of COD can reach 93.0-93.6%, and iron ion also can make mud closely knit, thereby, have processing efficiency high, strong shock resistance, produce the advantages such as sludge quantity is few.
(3) adopt compound bio to filter as post-processing unit, due to filtrate adopt charcoal and biozeolite compound, the one, gac itself is to organism, inorganics, the absorption such as metal ion and filteration can reduce COD, SS, the 2nd, zeolite itself can be removed ammonia nitrogen to the special role of ammonia nitrogen, the 3rd, biomembranous bio-oxidation and biological flocculation on charcoal and biozeolite, can further reduce COD and SS, COD after the compound bio filtering unit is processed, ammonia nitrogen, SS the accumulative removal rate can reach 99.6%, 92.4-94%, 98.5-98.6%, thereby obtain high-quality water outlet, can reach reuse of wastewater miscellaneous water water quality requirement.
Above-mentioned three polyergic results of formant, make the present invention have that effluent quality is good, sludge yield is few, save energy consumption, the advantages such as cost-saving, dosing is few, floor space is little, convenient operation and management.
The accompanying drawing explanation
Fig. 1 is the process flow diagram that the present invention processes garlic processing waste water deep treatment method;
Fig. 2 is the johning knot composition that the present invention processes each unit of garlic processing waste water advanced treatment system.
In figure: 1, water inlet pipe; 2, mechanical grille; 3, grid settling pit; 4, bucket; 5, the first water pump; 6, the first pipeline; 7, add the device of hydrogen peroxide; 8, add the device of sodium hydroxide; 9, dividing plate; 10, whipping appts; 11, iron carbon filler; 12, baffle plate; 13, the housing of pre-processing device; 14, the second pipeline; 15, tracheae; 16, tracheae; 17, central dividing plate; 18, dividing plate; 19, baffle plate; 20, life assemblage filler; 21, the housing of biological treating equipment; 22, aerator; 23, gas blower; 24, the 3rd pipeline; 25, the second water pump; 26, tracheae; 27, rising pipe; 28, composite filtering material; 29, aerator; 30, the housing of compound bio filter plant.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1 and Fig. 2, the embodiment of a kind of garlic processing waste water of the present invention advanced treatment system, the unit set gradually is: grid settling pit, pre-processing device, biological treating equipment, compound bio filter plant, described each unit connects by pipeline.
Pre-processing device comprises iron carbon filler 11, dividing plate 9 and the baffle plate 12 in the uncovered housing in upper end 13, housing 13, described dividing plate 9 will be divided into left and right two portions in housing 13, described iron carbon filler 11 is arranged on the mid-way in housing 13 interior left sides, described baffle plate 12 vertically is arranged on the upper part on housing 13 interior right sides, in the left side of described baffle plate 12, whipping appts 10 is set; Pre-processing device also configures the device 8 that adds the device 7 of hydrogen peroxide to described housing 13 internal partition 9 left sides and add sodium hydroxide to described housing 13 internal partition 9 right sides.
Biological treating equipment comprises life assemblage filler 20, aerator 22, dividing plate 18 and the baffle plate 19 in the uncovered housing in upper end 21, housing 21, described dividing plate 18 will be divided into biochemical zone and settling region in housing, the upper end of described dividing plate 18 is lower than uncovered edge, the upper end of described housing, described life assemblage filler 20 is arranged on the mid-way of housing 21 interior biochemical zones, described aerator 22 is set below described life assemblage filler 20, and described baffle plate 19 vertically is arranged on upper part of housing 21 interior settling regions.
The compound bio filter plant comprises composite filtering material 28, the aerator 29 in the uncovered housing in upper end 30, housing 30, and described composite filtering material 28 is arranged on the interior mid-way of housing 30, and described aerator 29 is set below described composite filtering material 28; Housing 30 side wall upper part of described compound bio filter plant set out water pipe 27.Above-mentioned composite filtering material 28 is charcoal and biozeolite.
Grid settling pit 3 tops set out the mouth of a river and are communicated with the water-in that described pre-processing device housing 13 bottoms arrange by the first pipeline 6, on described the first pipeline 6, the first water pump 5 are set; The water outlet that housing 13 tops of described pre-processing device arrange is communicated with the water-in that housing 21 tops of described biological treating equipment arrange by the second pipeline 14; The water outlet that housing 21 tops of described biological treating equipment arrange is communicated with the water-in that described compound bio filter plant housing 30 bottoms arrange by the 3rd pipeline 24, on described the 3rd pipeline 24, the second water pump 25 is set.
The ventpipe 15,16,26 that aerator 22 in the housing 21 of biological treating equipment and the aerator in described compound bio filter plant 30 29 connect is upwards drawn with same gas blower 23 and is connected from its equipment bottom respectively.
Referring to Fig. 1, the embodiment of a kind of garlic processing waste water of the present invention deep treatment method, adopt the garlic processing waste water advanced treatment system of above-described embodiment to carry out advanced treatment to the garlic processing waste water, and treatment process is as follows:
(1) grid sand setting: at first the garlic processing waste water enters the grid settling pit, by the mechanical grille in the grid settling pit remove in the garlic course of processing, produce as large floating matter and suspended substances such as garlic skins, be that the safe operation of follow-up structures improves and ensures.The inorganics that bucket precipitation removal silt particle in process grid settling pit and proportion are greater than water is 50-70 minute in the grid settling pit residence time;
(2) pre-treatment: the water after the grid sand setting enters pre-processing device, be introduced into the dividing plate left side process iron carbon filler in housing, because garlic wastewater is acid, utilize the iron carbon under acidic conditions to form some microbatterys, H atom and the ferrous ion of the status nascendi that the microbattery reaction produces, there is very high chemically reactive, the organism in the garlic processing waste water of can effectively degrading; Add hydrogen peroxide by the device that adds hydrogen peroxide, the ferrous ion that utilizes hydrogen peroxide to react generation with iron carbon microbattery forms Fenton reagent, the hydroxyl radical free radical that Fenton reagent produces has extremely strong oxygenizement, the pollutent in oxidable garlic processing waste water; Simultaneously, the formation of Fenton reagent has micro-electrolytic action of promotion, and in addition, hydrogen peroxide itself also has oxygenizement.The result of above-mentioned multiple action, make COD and ammonia nitrogen in the pre-treatment water outlet greatly reduce, effectively decompose the garlicin in the garlic processing waste water, and be small molecules by the material decomposition of the macromole in the garlic processing waste water and bio-refractory, be beneficial to microbiological deterioration, now waste water is acid, then enter the dividing plate right side in housing, add sodium hydroxide solution by the device that adds sodium hydroxide and adjust pH to 8-8.5, for subsequent biological treatment provides control environment, simultaneously, under alkaline condition, remaining ferrous ion becomes ferric ion and forms Fe (OH)
3, Fe (OH)
3good flocculation agent, can be by the material that is colloidal in water by compression double electric layer, reduce zeta-potential and by broken steady, produce precipitation and remove.The residence time of waste water is 5-7 hour, and the hydrogen peroxide consumption is 3.0-3.5mL/L.The clearance of COD, ammonia nitrogen, SS reaches respectively 88.8-89.2%, 72.1-75.8%, 60-63%;
(3) biological treatment: this element arranges biochemical zone and settling region, biochemical zone adopts biological contact oxidation process, biologic packing material is combined stuffing, cultivate microbial film is arranged on combined stuffing, pretreated water is introduced into this element biochemical zone, microbial film on combined stuffing under aerobic condition to the organism in waste water adsorbed, oxidative degradation, the microbial film that simultaneously comes off has biological flocculation, and the impurity in water is swept along after flocculation and entered the settling region precipitation and remove.Due to remaining iron ion being arranged in water, iron ion participates in the Metabolic activity of microorganism, can accelerate organic matter degradation rate and microorganisms grow speed, improves the processing efficiency of biological processing unit.Iron ion can reduce the activation energy of microorganism growth activation energy and substrate degradation reaction, weakens the impact that reaction process is subject to the external environment factors such as temperature, improves the impact resistance of biological processing unit.In addition, iron ion can improve the settling character of mud, makes mud closely knit, and volume reduces.The residence time of waste water is 14-16 hour, and DO is 3-3.5mg/L, and this element is mainly to reduce COD, and the clearance of COD can reach 93.0-93.6%;
(4) compound bio filters: the composite filtering material in compound bio filter plant housing is charcoal and biozeolite, water through biological treatment enters the compound bio filter plant, contain remaining organism, inorganics impurity in water outlet after biological treatment, adsorption by biomembranous biological oxidation, charcoal itself on charcoal and biozeolite, and the filtration crown_interception between the composite filtering material fine particle is removed organism, inorganics impurity further reduces COD and SS, absorption and ion exchange by biozeolite further reduce ammonia nitrogen; Gas-water ratio in compound bio filter plant housing is 4:1-6:1, particle diameter of filter medium 2-4mm, the residence time is 2-2.5 hour, after the compound bio filtering unit is processed, COD, ammonia nitrogen, SS the accumulative removal rate be respectively 99.6%, 92.4-94%, 98.5-98.6%, the water outlet leading indicator can reach reuse of wastewater miscellaneous water water quality requirement.
The specific embodiment of garlic processing waste water deep treatment method of the present invention is as follows:
Embodiment 1
Adopt the present invention to test processing to the garlic processing waste water, the grid settling pit residence time is 1h, the mechanical grille of 5mm is set, the pre-processing device residence time is 6h, the hydrogen peroxide consumption is 3.5mL/L, pH is adjusted to 8-8.5, the residence time of biological treating equipment is 14h, DO is 3.5mg/L, combined filtration equipment gas-water ratio is 4:1, particle diameter of filter medium 2-4mm, the residence time is 2h, the COD of water inlet, ammonia nitrogen and SS are respectively 11733mg/L, 71mg/L and 356mg/L, after garlic processing waste water advanced treatment system of the present invention and method processing, COD, ammonia nitrogen, SS the accumulative removal rate can reach 99.6%, 92.8%, 98.6%, water outlet COD, ammonia nitrogen and SS are respectively 44.8mg/L, 3.1mg/L and 5mg/L, can reach reuse of wastewater miscellaneous water water quality requirement.
Embodiment 2
Adopt the present invention to test processing to the garlic processing waste water, the grid settling pit residence time is 1h, the mechanical grille of 5mm is set, the pre-processing device residence time is 6h, the hydrogen peroxide consumption is 3.2mL/L, pH is adjusted to 8-8.5, the residence time of biological treating equipment is 14h, DO is 3.5mg/L, combined filtration equipment gas-water ratio is 4:1, particle diameter of filter medium 2-4mm, the residence time is 2h, the COD of water inlet, ammonia nitrogen and SS are respectively 10804mg/L, 65mg/L and 335mg/L, after garlic processing waste water advanced treatment system of the present invention and method processing, COD, ammonia nitrogen, SS the accumulative removal rate can reach 99.6%, 93.1%, 98.3%, water outlet COD, ammonia nitrogen, SS is respectively 42.6mg/L, 2.2mg/L, 5mg/L, can reach reuse of wastewater miscellaneous water water quality requirement.
Adopt the present invention to test processing to the garlic processing waste water, the grid settling pit residence time is 1h, the mechanical grille of 5mm is set, the pre-processing device residence time is 6h, the hydrogen peroxide consumption is 3.0mL/L, pH is adjusted to 8-8.5, the residence time of biological treating equipment is 14h, DO is 3mg/L, combined filtration equipment gas-water ratio is 4:1, particle diameter of filter medium 2-4mm, the residence time is 2h, the COD of water inlet, ammonia nitrogen and SS are respectively 9882mg/L, 62mg/L and 348mg/L, after garlic processing waste water advanced treatment system of the present invention and method processing, COD, ammonia nitrogen, SS the accumulative removal rate can reach 99.6%, 94.0%, 98.6%, water outlet COD, ammonia nitrogen, SS is respectively 41.3mg/L, 1.7mg/L, 5.0mg/L, can reach reuse of wastewater miscellaneous water water quality requirement.
Embodiment 4
Adopt the present invention to carry out the engineering processing to the garlic processing waste water, treatment capacity is 200m
3/ d, the grid settling pit residence time is 1h, the mechanical grille of 5mm is set, the pre-processing device residence time is 6h, the hydrogen peroxide consumption is 3.5mL/L, pH is adjusted to 8-8.5, the residence time of biological treating equipment is 14h, DO is controlled at 3.0-3.5mg/L, combined filtration equipment gas-water ratio is 6:1, particle diameter of filter medium 2-4mm, the residence time is 2h, the COD of water inlet, ammonia nitrogen and SS are respectively 10987mg/L, 67mg/L and 361mg/L, after garlic processing waste water advanced treatment system of the present invention and method processing, COD, ammonia nitrogen, SS the accumulative removal rate can reach 99.6%, 92.4%, 98.1%, water outlet COD, ammonia nitrogen, SS is respectively 45.5mg/L, 3.1mg/L, 7.0mg/L, can reach reuse of wastewater miscellaneous water water quality requirement.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is not limited to above-mentioned giving an example, those skilled in the art, and in essential scope of the present invention, the variation of making, remodeling, interpolation or replacement, all should belong to protection scope of the present invention.
Claims (10)
1. a garlic processing waste water advanced treatment system, is characterized in that, the unit set gradually is: grid settling pit, pre-processing device, biological treating equipment, compound bio filter plant, described each unit connects by pipeline.
2. according to garlic processing waste water advanced treatment system claimed in claim 1, it is characterized in that, described grid settling pit arranges water inlet pipe, the tilted mechanical grille that arranges of described grid settling pit, and described grid settling pit bottom arranges bucket;
Described pre-processing device comprises iron carbon filler, dividing plate and the baffle plate in the uncovered housing in upper end, housing, described dividing plate will be divided into left and right two portions in housing, described iron carbon filler is arranged on the mid-way in left side in housing, described baffle plate vertically is arranged on the upper part on right side in housing, in the left side of described baffle plate, whipping appts is set; Pre-processing device also configures and adds hydrogen peroxide unit and sodium hydroxide device, and pre-processing device also configures the device that adds the device of hydrogen peroxide to described housing internal partition left side and add sodium hydroxide to described housing internal partition right side;
Described biological treating equipment comprises life assemblage filler, aerator, dividing plate and the baffle plate in the uncovered housing in upper end, housing, described dividing plate will be divided into biochemical zone and settling region in housing, the upper end of described dividing plate is lower than uncovered edge, the upper end of described housing, described life assemblage filler is arranged on the mid-way of biochemical zone in housing, described aerator is set below described life assemblage filler, and described baffle plate vertically arranges upper part of settling region in housing;
Described compound bio filter plant comprises composite filtering material, the aerator in the uncovered housing in upper end, housing, and described composite filtering material is arranged on mid-way in housing, and described aerator is set below described composite filtering material; Described compound bio filter plant housing sidewall top sets out water pipe;
Described grid settling pit top sets out the mouth of a river and is communicated with the water-in that described pre-processing device lower housing portion arranges by the first pipeline, on described the first pipeline, the first water pump is set; The water outlet that described pre-processing device housing top arranges is communicated with the water-in that described biological treating equipment housing top arranges by the second pipeline; The water outlet that described biological treating equipment housing top arranges is communicated with the water-in that described compound bio filter plant lower housing portion arranges by the 3rd pipeline, on described the 3rd pipeline, the second water pump is set.
3. according to garlic processing waste water advanced treatment system claimed in claim 2, it is characterized in that, the ventpipe that the aerator in described biological treating equipment and the aerator in described compound bio filter plant connect is upwards drawn with same gas blower and is connected from its equipment bottom respectively.
4. according to the described garlic processing waste water of claim 2 or 3 advanced treatment system, it is characterized in that, life assemblage filler in described biological treating equipment housing is divided into left and right two portions by a central dividing plate vertically arranged, described central dividing plate upper end is concordant with biological treating equipment housing upper end, and gap is left in central dividing plate lower end and biological treating equipment housing bottom surface.
5. according to the described garlic processing waste water of claim 2 or 3 advanced treatment system, it is characterized in that, described composite filtering material is charcoal and biozeolite.
6. according to garlic processing waste water advanced treatment system claimed in claim 4, it is characterized in that, described composite filtering material is charcoal and biozeolite.
7. according to the described garlic processing waste water of claim 2 or 3 advanced treatment system, it is characterized in that, the grid gap of described mechanical grille is 4-6mm.
8. according to garlic processing waste water advanced treatment system claimed in claim 6, it is characterized in that, the grid gap of described mechanical grille is 4-6mm.
9. a garlic processing waste water deep treatment method, is characterized in that, adopts the described garlic processing waste water of claim 1-8 advanced treatment system to carry out advanced treatment to the garlic processing waste water, and treatment process is as follows:
(1) grid sand setting: at first the garlic processing waste water enters the grid settling pit, by the mechanical grille in the grid settling pit remove in the garlic course of processing, produce as large floating matter and suspended substances such as garlic skins, the inorganics that bucket precipitation removal silt particle in process grid settling pit and proportion are greater than water is 50-70 minute in the grid settling pit residence time;
(2) pre-treatment: the water after the grid sand setting enters pre-processing device, be introduced into the dividing plate left side process iron carbon filler in housing, because garlic wastewater is acid, utilize the iron carbon under acidic conditions to form some microbatterys, H atom and the ferrous ion of the status nascendi that the microbattery reaction produces, there is very high chemically reactive, the organism in the garlic processing waste water of can effectively degrading; Add hydrogen peroxide by the device that adds hydrogen peroxide, the ferrous ion that utilizes hydrogen peroxide to react generation with iron carbon microbattery forms Fenton reagent, the hydroxyl radical free radical that Fenton reagent produces has extremely strong oxygenizement, the pollutent in can oxidation garlic processing waste water; Simultaneously, the formation of Fenton reagent has micro-electrolytic action of promotion, and in addition, hydrogen peroxide itself also has oxygenizement; The result of above-mentioned multiple action, make COD and ammonia nitrogen in the pre-treatment water outlet greatly reduce, effectively decompose the garlicin in the garlic processing waste water, and be small molecules by the material decomposition of the macromole in the garlic processing waste water and bio-refractory, be beneficial to microbiological deterioration, now waste water is acid, then enter the dividing plate right side in housing, add sodium hydroxide solution by the device that adds sodium hydroxide and adjust pH to 8-8.5, for subsequent biological treatment provides control environment, simultaneously, under alkaline condition, remaining ferrous ion becomes ferric ion and forms Fe (OH)
3, Fe (OH)
3good flocculation agent, can be by the material that is colloidal in water by compression double electric layer, reduce zeta-potential and by broken steady, produce precipitation and remove; The residence time of waste water is 5-7 hour, and the hydrogen peroxide consumption is 3.0-3.5mL/L;
(3) biological treatment: biochemical zone and settling region are set, biochemical zone adopts biological contact oxidation process, cultivate microbial film is arranged on life assemblage filler in biological treating equipment, pretreated water enters biological treating equipment, be introduced into biochemical zone, microbial film on the life assemblage filler under aerobic condition to the organism in water adsorbed, oxidative degradation, the microbial film that simultaneously comes off has biological flocculation, and the impurity in water is swept along after flocculation and entered the settling region precipitation and remove; The residence time of waste water is 14-16 hour, and DO is 3-3.5mg/L;
(4) compound bio filters: the composite filtering material in compound bio filter plant housing is charcoal and biozeolite, water through biological treatment enters the compound bio filter plant, contain remaining organism, inorganics impurity in water outlet after biological treatment, adsorption by biomembranous biological oxidation, charcoal itself on charcoal and biozeolite, and the filtration crown_interception between the composite filtering material fine particle is removed organism, inorganics impurity further reduces COD and SS, absorption and ion exchange by biozeolite further reduce ammonia nitrogen; Gas-water ratio in compound bio filter plant housing is 4:1-6:1, particle diameter of filter medium 2-4mm, and the residence time is 2-2.5 hour, after the compound bio filtration treatment, main effluent index can reach reuse of wastewater miscellaneous water water quality requirement.
10. according to garlic processing waste water deep treatment method claimed in claim 9, it is characterized in that, the garlic processing waste water successively after grid settling pit, pre-processing device, biological treating equipment, compound bio filter plant are processed, COD, ammonia nitrogen, SS the accumulative removal rate be respectively 99.6%, 92.4-94%, 98.5-98.6%.
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| CN2013100615552A CN103086575A (en) | 2013-02-27 | 2013-02-27 | Deep treatment system and method for garlic processing wastewater |
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| CN2013100615552A CN103086575A (en) | 2013-02-27 | 2013-02-27 | Deep treatment system and method for garlic processing wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111285555A (en) * | 2020-03-24 | 2020-06-16 | 山东高科联合环保科学研究院有限公司 | Fenton and biological oxidation combined process and device with low medicament addition |
| CN114425187A (en) * | 2022-02-16 | 2022-05-03 | 北京航天神禾防务技术有限公司 | Multistage nanometer filter tower regulation and control system based on water quality testing |
| CN114455773A (en) * | 2020-10-21 | 2022-05-10 | 中国石油化工股份有限公司 | Treatment method of organic waste acid |
| CN114911209A (en) * | 2022-07-18 | 2022-08-16 | 巨野恒丰果蔬有限公司 | Garlic processing wastewater treatment management system based on data analysis |
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| CN111285555A (en) * | 2020-03-24 | 2020-06-16 | 山东高科联合环保科学研究院有限公司 | Fenton and biological oxidation combined process and device with low medicament addition |
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| CN114911209A (en) * | 2022-07-18 | 2022-08-16 | 巨野恒丰果蔬有限公司 | Garlic processing wastewater treatment management system based on data analysis |
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