CN107697998A - One kind is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation - Google Patents

One kind is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation Download PDF

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CN107697998A
CN107697998A CN201711023390.4A CN201711023390A CN107697998A CN 107697998 A CN107697998 A CN 107697998A CN 201711023390 A CN201711023390 A CN 201711023390A CN 107697998 A CN107697998 A CN 107697998A
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hasty
careless
waste water
rice paper
digestion liquid
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CN107697998B (en
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胡小兵
韦京云
林睿
徐水林
常静
唐素兰
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Anhui University of Technology AHUT
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Anhui University of Technology AHUT
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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
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry

Abstract

The invention discloses one kind to be based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, belongs to technical field of waste water processing.The present invention adds aluminium pipe in the hasty and careless black digestion liquid of rice paper and cleans waste water progress " the de- steady endogenous flocculation natural subsidence of lignin " integrated reacting, and the hasty and careless preceding low COD produced of rice paper, high alkalinity grass embryo slurry ash cleaning waste water progress pH anti-tunes are added into the acid supernatant of sedimentation.In the de- steady endogenous flocculation reaction of lignin, aluminium pipe cleaning waste water and black liquor are added than for 15:1~85:1.Contain Al in aluminium pipe cleaning waste water3+, there is endogenous flocculation, the de- tiny particles content flocculation surely separated out of the hasty and careless black digestion liquid lignin of rice paper can be accelerated, moreover it is possible to remove the colloid pollution thing in waste water, improve the removal effect to COD.The present invention does not add any chemical agent, using the interaction of three kinds of waste water, reaches three kinds of waste water processing intent simultaneously, is a kind of practicable preprocess method.

Description

One kind is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation
Technical field
The invention belongs to technical field of waste water processing, and Al is based on more specifically to one kind3+The rice paper of endogenous flocculation is hasty and careless Careless black digestion liquid preprocess method.
Background technology
Rice paper is foremost one kind in China's hand-made paper, though rice paper production has nearly one thousand years history, still takes over biography so far System technique, most of process rely on manual operations.Rice paper is using hasty and careless and wingceltis skin as raw material, produces various wastewater in production, Wherein pollute the most serious is black liquor caused by wingceltis skin, hasty and careless boiling, its COD concentration is high, and colourity is big, and alkalescence is strong.
The conventional pretreatment of black liquid be diluted, with acid and/or acidifying makes a large amount of existing wood in waste liquid Quality separates out." acid out -- flocculence handles papermaking wastewater " (Cai is superfine, 2006), with 96%~98% H2SO4As acid out agent COD clearances can be made to reach 50%~60%, but handling process route is long, installations and facilities are more, operating cost is high." different acid are right Black liquid acid out effect disquisition " (side beautiful jade etc., 2012) will filter out H2SO4As acid out agent, to black liquor colourity, COD clearances Respectively up to 97.9%, 66.1%, lignin amount of precipitation is 8.65g/L." improvement of acid extracting lignin process processing black liquid is with answering With " (Yang Weiming etc., 1997), using the method that flocculant is added while waste liquid acid out heats, it so can not only make lignin Further cohesion, mitigate filtering load during lignin separation, improve lignin filter efficiency, and flocculation also improves entirely Clearance of the technique to pollutants such as CODs.Above method, although the removal to pollutant in cooking waste liquor is effective, But processing will consume substantial amounts of H2SO4And flocculant, processing cost are high.
In order to reduce, waste liquid is antacid to add cost, a kind of novel papermaking black liquor treatment method and system (CN102757159A) industrial waste acid is added into papermaking wastewater waste water and carries out acid out processing, a large amount of lignin waddings are produced after acid out Body, it is separated by filtration step by step by filter tank.The filtrate after flco is separated by coagulation air-float equipment, being added under pneumatic stirring poly- Close aluminium chloride, anion-polyacrylamide PAM coagulant precipitations form flco.By sewage after coagulation air-float with Ca (OH)2Saturation Solution adjusts pH to after neutrality, into biochemical system processing.Though this method is using the throwing in industrial waste acid and waste liquid, saving acid Add expense, but coagulant, saturation Ca (OH)2Solution usage amount is big, and processing cost is still very high, and handling process is more complicated.
Therefore, it is necessary to more save cost, the simple black liquid preprocess method of technique.
The content of the invention
1. invention technical problems to be solved
In order to solve the problem of papermaking black liquor treatment technology is complicated, the more, waste of resource that adds medicament, and processing cost is high.This Invention provides a kind of preprocess method of simple, low cost the hasty and careless wastewater black liquor of rice paper, i.e., a kind of to be based on Al3+Endogenous flocculation The hasty and careless black digestion liquid preprocess method of rice paper；The present invention adapts to black liquid technical need, is screened in Alternative waste water of comforming Go out the pretreatment that a kind of acid waste water containing endogenous flocculant carries out black digestion liquid, reduce the hasty and careless waste water subsequent treatment of rice paper Load；Treatment of wastes with processes of wastes against one another theory is embodied, while processing rice paper hasty and careless black liquor, processing aluminium pipe cleaning waste water, careless embryo slurry ash Waste water is cleaned, reaches the purpose that three kinds of waste water are jointly processed by.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the invention is：
One kind of the present invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, comprises the following steps：
(1) in the hasty and careless black digestion liquid of certain volume rice paper, progressively add a pipe cleaning waste water and stir, carry out " wooden Element takes off steady-endogenous flocculation-natural subsidence " integrated reacting；
(2) according to a pipe cleaning wastewater volume is added, determine that the volume of a pipe cleaning waste water in hasty and careless black digestion liquid adds Than specifying the pipe cleaning wastewater flow rate that the hasty and careless black digestion liquid processing of rice paper needs to add；
(3) natural subsidence 0.5h after reacting, reaction flocculating setting thing is separated with supernatant；
(4) low COD grass embryo slurry ash cleaning waste water is added into the acid supernatant after sedimentation, pH anti-tunes is carried out, reaches row Put standard；
(5) volume is added according to careless embryo slurry ash cleaning waste water, determines that acid supernatant medium-height grass embryo slurry ash cleans waste water Volume adds ratio, specifies the careless embryo slurry ash cleaning wastewater flow rate that supernatant processing needs to add.
Further, the hasty and careless black digestion liquid of the rice paper, the hasty and careless boiling process for producing work of rice paper raw materials for production is come from Caused waste water in skill, COD 1.61*105~1.65*105Mg/L, pH are 10.3~11.2.
Further, described pipe cleaning waste water be waste water caused by aluminium pipe surface cleaning treatment, pH for 1.2~ 2.0, wherein containing H2SO4、HNO3、H3PO4And Al3+, Al3+For endogenous flocculant.
Further, aluminium pipe cleaning waste water is progressively added in step (1), until caused fine particle in waste liquid Thing is not further added by.
Further, determine that the volume ratio that aluminium pipe cleans waste water and the hasty and careless black digestion liquid of rice paper is in step (2) 15:1~85:1.
Further, the sedimentation separation supernatant acid waste water pH described in step (3) is 3.0~3.5.
Further, the careless embryo slurry ash cleaning waste water described in step (4) is caused by during hasty and careless handling process, COD concentration 410~450mg/L, pH are 10.0~12.4.
Further, step (4) regulation pH value of waste water is 6.9~7.1.
Further, determine that careless embryo slurry ash cleaning waste water and flocculating setting supernatant are added than for 16 in step (5):1 ~4:1.
3. beneficial effect
Using technical scheme provided by the invention, compared with existing known technology, there is following remarkable result：
(1) one kind of the invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, pre-process rice paper The operating procedure process of hasty and careless black digestion liquid is that " mixing-sedimentation "+pH is demodulated, and saves strong acid of the prior art, highly basic, mixed The preparation pond of solidifying agent and adding of agent system, acid out sedimentation basin or flotation tank etc. separate structures, and handling process is simple, operation side Just, for the rice paper manufacturing enterprise based on manual operations, there is very strong actual application value；
(2) one kind of the invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, realize " with It is useless to control useless, three kinds of waste water while handle " target, using a pipe cleaning hasty and careless black digestion liquid of wastewater treatment rice paper, add a surname Caused careless embryo slurry ash cleaning waste water demodulates excessive acidity in paper production, reduces COD, the color in the hasty and careless black digestion liquid of rice paper Degree, plant contact scar P elements in a pipe cleaning waste water are eliminated, reduce careless embryo slurry ash cleaning waste water alkalescence so that three kinds of waste water Handled simultaneously；
(3) one kind of the invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, the hasty and careless steaming of rice paper It is de- steady using aluminium pipe cleaning waste water to boil lignin of black liquid, pH value need to only reach 4.5, and 20~30 DEG C can complete under normal temperature, Lignin removal condition is low, and typically uses strong acid (H2SO4, HCl) separate out black liquor when, pH value must reach 3.5 Hereinafter, reaction temperature must reach 40~50 DEG C, and condition requires higher, therefore, can reduce the consumption of the processing energy；
(4) one kind of the invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, wastewater treatment In, it is not necessary to any chemical agent is added, a pipe cleaning waste water is the coagulant of the hasty and careless black digestion liquid lignin of rice paper, wherein depositing Al3+For endogenous flocculant, the de- tiny particles content flocculation surely crystallized of the hasty and careless black digestion liquid lignin of rice paper, and energy can be accelerated Other colloid pollution things in waste water are removed, improve COD removal effect, careless embryo slurry ash cleaning waste water is that pH demodulates agent, is realized PH is up to standard, belongs to green method；
(5) one kind of the invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, handle 1 ton of a surname The hasty and careless black digestion liquid of paper, the cost of use 630-760 members of strong acid, coagulant and limewash can be saved；Meanwhile 15-85 can be handled Ton pipe cleaning waste water and 250-340 ton grass embryo slurry ash cleaning waste water, save processing cost 4556-8150 members.One ton of a surname of processing Paper cooking waste liquor, expense 5186-8910 members are saved altogether.Calculate according to statistics, the hasty and careless boiling of the several main small towns rice paper in processing Jingxian County Waste liquid, it is ten thousand yuan of 5678-9756 that can save within 1 year processing cost.The pretreatment side of the present invention processing hasty and careless black digestion liquid of rice paper Method, adding for medicament is saved, substantially reduces processing cost.
Embodiment
To further appreciate that present disclosure, with reference to embodiment, the invention will be further described.
One kind of the present invention is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, in order to effective, economic Ground handles the hasty and careless black digestion liquid of rice paper, according to the thinking of " treatment of wastes with processes of wastes against one another, green processing ", is screened in more industrial production wastewaters of comforming Go out the waste water containing multiple water treatment functionalized chemical composition, carry out integrated reacting, form simple, the adaptation hasty and careless boiling of rice paper The handling process of black liquor pretreatment.
Technical scheme is specific as follows：
(1) in the black liquor of the hasty and careless production discharge of rice paper of certain volume, progressively add aluminium pipe cleaning waste water and stir Mix, " lignin takes off steady-endogenous flocculation-natural subsidence " integrated reacting is carried out, until producing substantial amounts of, tiny in waste liquid Grain thing.The hasty and careless black digestion liquid of rice paper is that caused waste water, COD are up to 1.61*10 in hasty and careless digestion process5~1.65*105Mg/L, Colourity 1*105Times.Due to residual lime in waste water be present, in alkalescence, pH is 10.3~11.2.Pipe cleans wastewater source in aluminium Material pipe cleans factory, according to H2SO4:HNO3:H3PO4Volume ratio is 2:1:0.01 ratio prepares acid solution, launches in pickling tube, Writing brush pipe is put into and wherein carries out immersion treatment.Pipe, which is pulled out to be placed in clear water reserviors, to be cleaned, and that is discharged after cleaning fluid use is useless Water, be exactly a pipe cleaning waste water, pH is 1.2~2.0.Ca (OH) in black liquor2With the H in a pipe cleaning waste water2SO4、H3PO4First Generation neutralization reaction, generation are slightly soluble in the CaSO of water4、Ca3(PO4)2, turn into the particulate matter constituent that reaction is formed.When pen pipe When cleaning waste water is excessively added to solution in acid (pH≤4.5), the lignin in the hasty and careless black digestion liquid of rice paper is de- steady, from waste liquid Middle precipitation, form insoluble substance.In two kinds of waste waters react, Al present in a pipe cleaning waste water3+With endogenous wadding Solidifying effect, the de- tiny particles content flocculation surely separated out of the hasty and careless black digestion liquid lignin of rice paper can be accelerated, the glue in waste water can be removed Body pollution thing, improve to COD removal effects.Described tiny particles content, by the hasty and careless boiling of microsolubility precipitum, rice paper reacted Steady lignin Al in aluminium pipe waste water is taken off in black liquor3+The composition such as particulate matter that is formed of endogenous flocculation.
(2) according to the cleaning wastewater volume finally added, according to the processing of " particulate matter forms most, COD and removed at most " It is required that determining that the volume of aluminium pipe cleaning waste water in black liquor adds ratio, specifying the hasty and careless black digestion liquid processing of rice paper needs what is added The volume ratio of pipe cleaning wastewater flow rate, a pipe cleaning waste water and the hasty and careless black digestion liquid of rice paper is 15:1~85:1.
(3) natural subsidence 0.5h is carried out after reacting, reaction flocculating setting thing is separated with supernatant, acid supernatant PH is 3.0~3.5.
(4) low COD, the high alkalinity grass embryo slurry ash of the hasty and careless preceding production of rice paper are added into the acid supernatant after natural subsidence Waste water is cleaned, pH anti-tunes is carried out, reaches discharge standard.The careless embryo slurry ash cleaning waste water of alkalescence, is from hasty and careless processing technological flow Careless embryo slurry ash cleaning waste water, pH is that 10.0~12.4, COD is 410~450mg/L.
(5) volume is added according to careless embryo slurry ash cleaning waste water, determines that acid supernatant medium-height grass embryo slurry ash cleans waste water Volume adds ratio, it is determined that the careless embryo for needing to add in processing unit volume acid supernatant starches ash cleaning wastewater volume.In acidity The volume of careless embryo slurry ash cleaning waste water in clear liquid is added than for 16:1~4:1, regulation pH value of waste water to 6.9~7.1.
The present invention realizes the target of the treatment of wastes with processes of wastes against one another, three kinds of waste water while processing, and wastewater treatment rice paper is cleaned using a pipe Hasty and careless black digestion liquid, add caused careless embryo slurry ash cleaning waste water in rice paper production and demodulate excessive acidity, reduce rice paper COD, colourity in hasty and careless black digestion liquid, plant contact scar P elements in a pipe cleaning waste water are eliminated, reduce careless embryo slurry ash cleaning Waste water alkalescence so that three kinds of waste water are handled simultaneously.The operating procedure process for pre-processing the hasty and careless black digestion liquid of rice paper is " mixed Conjunction-sedimentation "+pH is demodulated, and saves strong acid of the prior art, highly basic, the preparation pond of coagulant and adding of agent system, acid out Sedimentation basin or flotation tank etc. separate structures, and handling process is simple, easy to operate, and enterprise is produced for the rice paper based on manual operations Industry, there is very strong actual application value.The hasty and careless black digestion liquid lignin of rice paper is de- steady using aluminium pipe cleaning waste water, pH value 4.5 only need to be reached, 20~30 DEG C can complete under normal temperature, and lignin removal condition is low, and typically uses strong acid (H2SO4、HCl) When separating out black liquor, pH value must reach less than 3.5, and reaction temperature must reach 40~50 DEG C, and condition requires higher, Therefore, the consumption of the processing energy can be reduced.In wastewater treatment, it is not necessary to add any chemical agent, a pipe cleaning waste water is a surname The coagulant of the hasty and careless black digestion liquid lignin of paper, Al present in it3+For endogenous flocculant, the hasty and careless black digestion liquid of rice paper can be accelerated The de- tiny particles content flocculation surely crystallized of lignin, and other colloid pollution things in waste water can be removed, improve COD removal effect Fruit, careless embryo slurry ash cleaning waste water is that pH demodulates agent, realizes that pH is up to standard, is a kind of green method of wastewater treatment.
Embodiment 1
One kind of the present embodiment is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, concrete technology is such as Under：
(1) from the hasty and careless peasant household's black digestion liquid discharge pond of production one in place of production Anhui Province of rice paper orthodox school Jingxian County town, writing brush life Production factory gathers rice paper and produces hasty and careless black digestion liquid and aluminium pipe cleaning waste water respectively.
(2) hasty and careless black digestion liquid pH is 10.3, CODCrFor 1.65*105Mg/L, colourity 1*105Times；Pipe cleaning wastewater pH For 1.2, COD 40.00mg/L.
(3) 15 are pressed:1 ratio will clean waste water, hasty and careless black digestion liquid carries out hybrid reaction.After mixed liquor reaction 15min, It is about 4000mg/L to measure COD in supernatant, pH 3.1,3000 times of colourity.COD, chroma removal rate respectively reach 97.6%, 97%, solid amount of precipitation is 2.4g/L mixed liquors.
(4) mixed liquor containing flco being subjected to sedimentation separation, precipitum is used to improve basic soil, and supernatant is acid, PH is 3.2.
(5) according to 16:1 volume ratio, the rice paper grass embryo of low COD (410mg/L), high alkalinity (pH 11.4) is starched into ash Cleaning waste water is added in supernatant, progress pH anti-tunes to 7.0 or so, and COD concentration (4000mg/L) further drops in supernatant Low is 603mg/L.
(6) after by pretreatment, COD, the chroma removal rate of the hasty and careless black digestion liquid of rice paper respectively reach 99.6%, 99.8%.
Embodiment 2
(1) the writing brush factory from another town of place of production Anhui Province of rice paper orthodox school Jingxian County, the hasty and careless boiling of a peasant household are black Liquid discharge pond gathers a pipe cleaning waste water respectively, rice paper produces hasty and careless black digestion liquid.
(2) a pipe cleaning wastewater pH is that 2.0, COD is 38.00mg/L；Hasty and careless black digestion liquid pH is that 11.2, COD is 1.61* 105Mg/L, colourity are 1*105Times.
(3) 85 are pressed:1 ratio will clean waste water, hasty and careless black digestion liquid carries out hybrid reaction.After mixed liquor reaction 15min, PH is 3.4.COD contents about 1400mg/L in supernatant, colourity are 125 times.COD, chroma removal rate respectively up to 99.1%, 99.9%, lignin amount of precipitation is 0.9g/L mixed liquors.
(4) mixed liquor containing flco being subjected to sedimentation separation, precipitum is used to improve basic soil, and supernatant is acid, PH is 3.4.
(5) according to 4:1 ratio, by the rice paper grass embryo slurry ash cleaning of low COD (450mg/L), high alkalinity (pH 12.4) Waste water is added in supernatant, and pH is demodulated to neutral (7.1) left and right, COD concentration (1400mg/L) and is reduced to 628mg/L.
After pretreatment, COD, the chroma removal rate of hasty and careless black digestion liquid about reach 99.6%, 100% respectively.
Embodiment 3
(1) the writing brush factory from another town of place of production Anhui Province of rice paper orthodox school Jingxian County, the hasty and careless boiling of a peasant household are black Liquid discharge pond gathers a pipe cleaning waste water respectively, rice paper produces hasty and careless black digestion liquid.
(2) a pipe cleaning wastewater pH is that 1.5, COD is 45.00mg/L；Hasty and careless black digestion liquid pH is that 10.5, COD is 1.63* 105Mg/L, colourity are 1*105Times.
(3) 65 are pressed:1 ratio will clean waste water, hasty and careless black digestion liquid carries out hybrid reaction.After mixed liquor reaction 15min, PH is 3.2.COD contents about 1500mg/L in supernatant, colourity are 125 times.COD, chroma removal rate respectively up to 99.1%, 99.9%, lignin amount of precipitation is 1.2g/L mixed liquors.
(4) mixed liquor containing flco being subjected to sedimentation separation, precipitum is used to improve basic soil, and supernatant is acid, PH is 3.2.
(5) according to 7:1 ratio, by the rice paper grass embryo slurry ash cleaning of low COD (430mg/L), high alkalinity (pH 11.4) Waste water is added in supernatant, and pH is demodulated to 6.9 or so, CODCrConcentration is reduced to 600mg/L.
After pretreatment, the COD of hasty and careless black digestion liquidCr, chroma removal rate about reach 99.6%, 100% respectively.
The hasty and careless black digestion liquid preprocess method of rice paper described in embodiment 1-3,1 ton of hasty and careless black digestion liquid of rice paper is handled, can Save the cost of use 630-760 members of strong acid, coagulant and limewash；Meanwhile can handle 15-85 tons pipe cleaning waste water and 250-340 ton grass embryo slurry ash cleaning waste water, saves processing cost 4556-8150 members.One ton of rice paper cooking waste liquor is handled, is saved altogether Expense 5186-8910 members.Calculate according to statistics, the hasty and careless cooking waste liquor of the several main small towns rice paper in processing Jingxian County, place can be saved within 1 year Reason expense is ten thousand yuan of 5678-9756.The preprocess method of the present invention processing hasty and careless black digestion liquid of rice paper, saves adding for medicament, Substantially reduce processing cost.

Claims (9)

1. one kind is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, comprises the following steps：
(1) in the hasty and careless black digestion liquid of certain volume rice paper, progressively add a pipe cleaning waste water and stir, " lignin takes off for progress Surely-endogenous flocculation-natural subsidence " integrated reacting；
(2) according to a pipe cleaning wastewater volume is added, determine that the volume of a pipe cleaning waste water in hasty and careless black digestion liquid adds ratio, it is bright The true hasty and careless black digestion liquid processing of rice paper needs the pipe cleaning wastewater flow rate added；
(3) natural subsidence 0.5h after reacting, reaction flocculating setting thing is separated with supernatant；
(4) low COD grass embryo slurry ash cleaning waste water is added into the acid supernatant after sedimentation, pH anti-tunes is carried out, reaches discharge mark It is accurate；
(5) volume for adding volume, determining acid supernatant medium-height grass embryo slurry ash cleaning waste water of ash cleaning waste water is starched according to careless embryo Ratio is added, specifies the careless embryo slurry ash cleaning wastewater flow rate that supernatant processing needs to add.
2. one kind according to claim 1 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：The hasty and careless black digestion liquid of rice paper, come from caused useless in the hasty and careless boiling processing production technology of rice paper raw materials for production Water, CODCrFor 1.61*105~1.65*105Mg/L, pH are 10.3~11.2.
3. one kind according to claim 2 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：Described pipe cleaning waste water is waste water caused by aluminium pipe surface cleaning treatment, and pH is 1.2~2.0, wherein containing H2SO4、HNO3、H3PO4And Al3+, Al3+For endogenous flocculant.
4. one kind according to Claims 2 or 3 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, It is characterized in that：Aluminium pipe cleaning waste water is progressively added in step (1), until caused tiny particles content no longer increases in waste liquid Add.
5. one kind according to claim 4 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：The volume ratio that aluminium pipe cleaning waste water and the hasty and careless black digestion liquid of rice paper are determined in step (2) is 15:1~85:1.
6. one kind according to claim 5 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：Sedimentation separation supernatant acid waste water pH described in step (3) is 3.0~3.5.
7. one kind according to claim 6 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：Careless embryo slurry ash cleaning waste water described in step (4) is caused by during hasty and careless handling process, COD concentration 410~ 450mg/L, pH are 10.0~12.4.
8. one kind according to claim 7 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：Step (4) regulation pH value of waste water is 6.9~7.1.
9. one kind according to claim 8 is based on Al3+The hasty and careless black digestion liquid preprocess method of rice paper of endogenous flocculation, it is special Sign is：Determine that careless embryo slurry ash cleaning waste water and flocculating setting supernatant are added than for 16 in step (5):1~4:1.
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