CN109095622A - A method of promote sludge to extract flocculant using metazoa - Google Patents
A method of promote sludge to extract flocculant using metazoa Download PDFInfo
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
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Abstract
A method of promote sludge to extract flocculant using metazoa, the invention belongs to sewage treatment fields.It is harsh using excess sludge production microbial flocculant condition that the invention solves existing, and high production cost, extraction difficulty is big, and the problem that the flocculant flocculating rate directly extracted is low.Method: one, homogenize process is concentrated；Two, metazoa biological treatment is utilized；Three, hot acid solution is handled.The present invention is used to promote sludge to extract flocculant using metazoa.
Description
Technical field
The invention belongs to sewage treatment fields.
Background technique
The principal component of microbial flocculant is the large biological molecules polymer such as protein, polysaccharide and nucleic acid, is existed by microorganism
It generates in cellular process, by the extraction process based on physics, chemism, its secondary metabolite is separated, thus
Obtaining has the microbial flocculant product for promoting suspended particulate in water, thallus, colloidal particle to settle.Microbial flocculant has
The advantages such as environmental-friendly, ecological safety are concerned in water process research and application field in recent years.
Three kinds of technology paths are focused mainly on for the preparation of microbial flocculant at present, pass through preferred microorganism flocculant
Bacteria strain is generated, culture production flocculant is carried out on culture medium.
One of technology path is to produce flocculant by more fine culture medium, and optimize to fermentation parameter.It is main
It to be substrate or yeast extract etc. using the carbon source of glucose, fructose, sucrose, starch etc., the nitrogen sources such as peptone, urea, nitrate
Metabolism next life producing microbial flocculant occurs for substrate full of nutrition, selected bacterium for producing flocculant of microbe.Such as patent
CN103435250A discloses a kind of method for adding microbial flocculant improvement activated sludge dehydration performance, from activated sludge
Separation, purifying, screening obtain bacterium for producing flocculant of microbe Klebsiellapneumoniae, are 25~40 DEG C in temperature, turn
Speed has extracted flocculant sample under conditions of being 100~200r/min oscillation and fermentation cultivation, 2~3d from fermented supernatant fluid, and
For sludge dewatering.Patent CN106430627A discloses a kind of preparation method and application of fungal microbe flocculant, will
It is 6.0~9.0 that aspergillus niger, which is inoculated in initial pH, with glucose, (NH4)2SO4, urea, on the culture medium of preparations such as yeast extract, in
30~35 DEG C, under conditions of 150~200r/min after 36~72h of shaken cultivation, collect fermentation liquid and be made.Patent
CN106630063A disclose it is a kind of by series bacillus generate microbial flocculant and its application, by above-mentioned series bacillus
It being seeded in the fermentation medium made of starch, sodium dihydrogen phosphate, potassium nitrate etc., cultivation temperature is 30 DEG C, shaking table cultivation 2~
3 days acquisition microbial flocculants.The difficult point of this technology is the screening of bacterium for producing flocculant of microbe bacterial strain and produces wadding characteristic
Research comprehensively, meanwhile, the price of the substrates such as glucose, yeast extract, urea is higher, causes production cost higher.Need exploration pair
The utilization of cheap substrates is to reduce whole production cost.
Second of technology path is to utilize cheap food production residue, waste water and leftover bits and pieces substrate cultivation microbial flocculation
Agent, such as patent CN108060179A disclose a kind of dephosphorization microbial flocculant and its preparation method and application, using stalk,
Sweet potato dregs, bagasse-like crude fibre raw material are substrate, by three grade fermemtation, are inoculated with flcos producing bacteria step by step respectively, solution fiber clostridium, glue
Bacterium, it is final to obtain tunning flocculant.Patent CN107089712A is disclosed a kind of prepared using marine product leftover bits and pieces and given birth to
The method of state biomimetic type microbial flocculant is passed through after being prepared using the marine products leftover bits and pieces such as fish maw, flesh of fish clast and artificial seawater
Hydrolytic process is crossed, the sludge suspension that the Liquid Culture Ruditapes philippinarum after hydrolysis is spued obtains flocculant.Patent
CN105238843B discloses a kind of microbial flocculant, preparation method and applications, the fermentation configured with sweet potato processing waste water
Culture medium inoculated bacterium for producing flocculant of microbe, and phosphate and sweet potato processing waste water are supplemented during the fermentation, by 24-
The fermentation of 42h obtains microbial flocculant.Patent CN102776239A is disclosed using after yeast wastewater and beer waste water mixing
Culture medium production microbial flocculant and method is made in addition phosphate.Food and industrial waste is utilized in such technology path
Etc. cheap nutriment, its growth is supported as the substrate of bacterium for producing flocculant of microbe strain by certain processing, however
The preparation process of culture medium is often relatively complicated, and the nutritional ingredient of cheap substrates is possible to insufficient, generally requires additionally to add battalion
It forms point or supplements the nutrients during the fermentation, due to cellulose when producing flocculant especially with ingredients such as celluloses
It is difficult to work with, needs to carry out repeatedly to ferment to generate flocculant product.
The third technology path be using city solid waste-excess sludge as additive be made microbial flocculant culture medium and
Using, for example, patent CN105217805B disclose it is a kind of using residual active sludge and agricultural crop straw preparation microbial flocculation
Sterilizing sludge is mixed sterilizing with acidolysis stalk liquid and culture medium is made, further adds phosphoric acid during the fermentation by the method for agent
Salt and sterilizing activity sludge ferment for flocculant.Patent CN103408146A discloses a kind of by biological flocculant and polymerization chlorine
Change aluminum for the method for composite flocculation agent, wherein sewage treatment plant excess sludge is utilized in the preparation part of organic-biological flocculant
With breeding wastewater distinguish high-temperature sterilization, take sterilizing after excess sludge supernatant and breeding wastewater with the ratio of volume ratio 1:(6-11)
Example is mixed into culture medium, ferments to obtain organic-biological flocculant for being inoculated with bacterium for producing flocculant strain.At present for sludge conduct
The technology path that substrate prepares culture medium includes adding on this basis using sterilizing sludge and using sterilizing two class of sludge supernatant
Add other cheap matrix and nutrients that culture medium is made, realizing a degree of flocculant production cost reduces.Such technique
Although realizing the utilization to sludge, but still need by sterilizing and additional addition nutrients.
City excess sludge is reluctant city solid waste, and since yield is high, pollution is big, excess sludge has become sewage
It cannot be neglected environomental pollution source derived from treatment industry.Microbial flocculant is produced due to environment friend using excess sludge
The advantages such as good, ecological safety, cheap are concerned in water process research and application field in recent years.Previous skill
Art route is often concentrated on to be needed additionally to add other battalion using sterilizing sludge preparation culture medium due to the deficiency of nutritional ingredient
Substance is supported, meanwhile, the fermentation condition of bacterium for producing flocculant is more harsh, and therefore, whole production cost and technical need are still
It is higher.In excess sludge in the form of microbial aggregate-zoogloea existing for biomass account for the 60%~70% of whole dry weight,
In contain a large amount of microbial cell, be rich in protein and polysaccharide, cell envelope main component be protein and polysaccharide pod membrane
It is wrapped up with slime layer, if can be that direct raw materials for production mention with excess sludge to the direct extraction and application of agglutinating matter therein
Microbial flocculant is taken, the cumbersome flocculant production process such as additional medium sterilization, preparation, fermentation is omitted from, saves battalion
The costs such as substrate addition, fermented and cultured energy and material consumption are supported, is conducive to the popularization and application in economically underdeveloped area, can be realized dirt
The resource utilization of mud.However, due to sludge wadding body complicated component, it is larger to the extraction difficulty of its flocculation activity substance.
In conclusion existing harsh using excess sludge production microbial flocculant condition, high production cost extracts difficulty
Greatly, and directly the flocculant flocculating rate extracted is low, and usually less than 30%.
Summary of the invention
It is harsh using excess sludge production microbial flocculant condition that the invention solves existing, and high production cost is extracted
Difficulty is big, and the problem that the flocculant flocculating rate directly extracted is low, and provides a kind of extract using metazoa promotion sludge and wad a quilt with cotton
The method of solidifying agent.
It is a kind of using metazoa promote sludge extract flocculant method be to sequentially include the following steps:
One, homogenize process is concentrated:
Sewage treatment plant is stood without the excess sludge of dehydration, 2h~3h is precipitated, removes supernatant, take concentration heavy
Sludge behind shallow lake successively removes impurity with the screen to filtrate of 4 mesh and 10 mesh, the sludge after obtaining concentration homogeneous；
Two, metazoa biological treatment is utilized:
It is 3000mg/L~5000mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water, and it is mixed to obtain sludge
Liquid is closed, metazoa is added into mud mixed liquid and carries out biological pretreatment, obtains metazoa treated sludge；
If the metazoa is large-scale metazoa, in temperature be 22 DEG C~26 DEG C and dissolved oxygen concentration is
Under conditions of 2mg/L~4mg/L, 12g~20g large size metazoa is added into every 1L mud mixed liquid, is handled 3 days~5 days；
It is that 22 DEG C~26 DEG C and dissolved oxygen concentration are greater than in temperature if the metazoa is small-sized metazoa
Under conditions of 2mg/L, 50~200 small-sized metazoas are added into every 1mL mud mixed liquid, are handled 3 days~5 days；
If the metazoa is the combination of large-scale metazoa and small-sized metazoa, temperature be 22 DEG C~
Under conditions of 26 DEG C and dissolved oxygen concentration are 2mg/L~4mg/L, added into every 1L mud mixed liquid 12g~20g it is large-scale after it is raw
Animal, and 10~100 small-sized metazoas are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
It is 22 DEG C in temperature if the metazoa is the combination of large-scale metazoa and the type metazoa that swims
Under conditions of~26 DEG C and dissolved oxygen concentration are 3.5mg/L~4mg/L, 12g~20g large size is added into every 1L mud mixed liquid
Metazoa, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
It is 22 DEG C in temperature if the metazoa is the combination of small-sized metazoa and the type metazoa that swims
~26 DEG C and dissolved oxygen concentration are greater than under conditions of 3.5mg/L, added into every 1mL mud mixed liquid 50~200 it is small-sized
Metazoa, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
The large-scale metazoa is one of water silk earthworm, tubificid and cercobranchiate earthworm or in which several combinations；It is described
Small-sized metazoa be Piao body worm；The type metazoa that swims is water flea；
Three, hot acid solution is handled:
By metazoa treated sludge condensation precipitating, then use strainer filtering, and remove supernatant so that sludge with
Metazoa separation, by the sludge after separation under conditions of revolving speed is 2500r/min~3000r/min, centrifugation 5min~
10min removes supernatant, obtains sludge solid content；The sludge solid water content of matter is 85%~90%；To 10g~20g
The HCl solution that mass percent is 30%~36%, the sludge after obtaining acid adding, then to after acid adding are added in sludge solid content
Sludge in add distilled water, obtain acidolysis sludge solutions, the volume of the acidolysis sludge solutions is 100mL, then in temperature
Degree is under conditions of 30 DEG C~50 DEG C, acidolysis 20min~30min, in revolving speed is 8000r/min~10000r/min's after acidolysis
Under the conditions of, it is centrifuged 10min~15min, takes supernatant as flocculant, that is, completes to promote sludge to extract flocculation using metazoa
The method of agent；
HCl concentration is 0.5mol/L~1mol/L in the acidolysis sludge solutions.
The beneficial effects of the present invention are:
City excess sludge is difficult to the city solid waste of processing, using excess sludge production microbial flocculant due to having
The advantages such as environmental-friendly, ecological safety, cheap are concerned in water process research and application field in recent years.It is surplus
In remaining sludge in the form of microbial aggregate-zoogloea existing for biomass account for the 60%~70% of whole dry weight, wherein containing
A large amount of microbial cell, and wrapped up with protein and polysaccharide pod membrane as main component and slime layer, the invention discloses
A method of improving sludge base flocculant efficiency, can the direct extraction and application of agglutinating matter to excess sludge, with excess sludge
Extracting microbial flocculant for direct raw materials for production by means of the present invention can be effectively directly from the residue of concentration
Flocculant is extracted in sludge, saves energy and material consumption, and production cost is low, and extraction difficulty is small, and the flocculant of acquisition can be directly used for
Sewage is handled, can also be compounded with inorganic flocculating agent, composite flocculation agent is made for handling sewage, flocculating rate can reach
64.9% or more.
The present invention is for a kind of method for promoting sludge to extract flocculant using metazoa.
Specific embodiment
Specific embodiment 1: a kind of method for promoting sludge to extract flocculant using metazoa of present embodiment is
It sequentially includes the following steps:
One, homogenize process is concentrated:
Sewage treatment plant is stood without the excess sludge of dehydration, 2h~3h is precipitated, removes supernatant, take concentration heavy
Sludge behind shallow lake successively removes impurity with the screen to filtrate of 4 mesh and 10 mesh, the sludge after obtaining concentration homogeneous；
Two, metazoa biological treatment is utilized:
It is 3000mg/L~5000mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water, and it is mixed to obtain sludge
Liquid is closed, metazoa is added into mud mixed liquid and carries out biological pretreatment, obtains metazoa treated sludge；
If the metazoa is large-scale metazoa, in temperature be 22 DEG C~26 DEG C and dissolved oxygen concentration is
Under conditions of 2mg/L~4mg/L, 12g~20g large size metazoa is added into every 1L mud mixed liquid, is handled 3 days~5 days；
It is that 22 DEG C~26 DEG C and dissolved oxygen concentration are greater than in temperature if the metazoa is small-sized metazoa
Under conditions of 2mg/L, 50~200 small-sized metazoas are added into every 1mL mud mixed liquid, are handled 3 days~5 days；
If the metazoa is the combination of large-scale metazoa and small-sized metazoa, temperature be 22 DEG C~
Under conditions of 26 DEG C and dissolved oxygen concentration are 2mg/L~4mg/L, added into every 1L mud mixed liquid 12g~20g it is large-scale after it is raw
Animal, and 10~100 small-sized metazoas are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
It is 22 DEG C in temperature if the metazoa is the combination of large-scale metazoa and the type metazoa that swims
Under conditions of~26 DEG C and dissolved oxygen concentration are 3.5mg/L~4mg/L, 12g~20g large size is added into every 1L mud mixed liquid
Metazoa, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
It is 22 DEG C in temperature if the metazoa is the combination of small-sized metazoa and the type metazoa that swims
~26 DEG C and dissolved oxygen concentration are greater than under conditions of 3.5mg/L, added into every 1mL mud mixed liquid 50~200 it is small-sized
Metazoa, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
The large-scale metazoa is one of water silk earthworm, tubificid and cercobranchiate earthworm or in which several combinations；It is described
Small-sized metazoa be Piao body worm；The type metazoa that swims is water flea；
Three, hot acid solution is handled:
By metazoa treated sludge condensation precipitating, then use strainer filtering, and remove supernatant so that sludge with
Metazoa separation, by the sludge after separation under conditions of revolving speed is 2500r/min~3000r/min, centrifugation 5min~
10min removes supernatant, obtains sludge solid content；The sludge solid water content of matter is 85%~90%；To 10g~20g
The HCl solution that mass percent is 30%~36%, the sludge after obtaining acid adding, then to after acid adding are added in sludge solid content
Sludge in add distilled water, obtain acidolysis sludge solutions, the volume of the acidolysis sludge solutions is 100mL, then in temperature
Degree is under conditions of 30 DEG C~50 DEG C, acidolysis 20min~30min, in revolving speed is 8000r/min~10000r/min's after acidolysis
Under the conditions of, it is centrifuged 10min~15min, takes supernatant as flocculant, that is, completes to promote sludge to extract flocculation using metazoa
The method of agent；
HCl concentration is 0.5mol/L~1mol/L in the acidolysis sludge solutions.
Present embodiment step 1 is filtered to remove common in the sewage treatment plants such as big gravel, dead leaf, plant seed
Impurity in water treatment system makes sludge realize homogenizing for floc particle.
Present embodiment step 2 by metazoa to the tearing of sludge wadding body, swallow, filter the effects of food, realization
The part of sludge wadding body solves wadding, the dissolution of sludge content, and sludge extracellular polymeric is removed and is dissolved in sludge supernatant, thus
Realize the bioanalysis lysis of sludge cell.
The dosage of the medium-and-large-sized metazoa of present embodiment step 2 is weight in wet base.
The medium-and-large-sized metazoa of present embodiment step 2 can screen the polypide of different stages of growth, according to specific
Environmental condition promotes treatment effect.The metazoa isolated can recycle.
The beneficial effect of present embodiment is: city excess sludge is difficult to the city solid waste of processing, utilizes residue
Sludge produces microbial flocculant due to the advantages such as environmental-friendly, ecological safety, cheap, water process in recent years
It is concerned in research and application field.In excess sludge in the form of microbial aggregate-zoogloea existing for biomass account for it is whole
The 60%~70% of soma weight, wherein containing a large amount of microbial cell, and by with protein and polysaccharide pod as main component
Film and slime layer package, present embodiment disclose a kind of method for improving sludge base flocculant efficiency, can be to remaining dirty
The direct extraction and application of the agglutinating matter of mud is that direct raw materials for production extract microbial flocculant with excess sludge, by this hair
Bright method can effectively directly extract flocculant from the excess sludge of concentration, save energy and material consumption, production cost
Low, extraction difficulty is small, and the flocculant of acquisition can be directly used for processing sewage, can also be compounded, is made with inorganic flocculating agent
For composite flocculation agent for handling sewage, flocculating rate can reach 64.9% or more.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: distilled water is utilized in step 2
It is 4500mg/L~5000mg/L that sludge after concentration homogeneous, which is diluted to concentration, mud mixed liquid is obtained, to mud mixed liquid
In add metazoa and carry out biological pretreatment, obtain metazoa treated sludge.Other and specific embodiment one
It is identical.
Specific embodiment 3: unlike one of present embodiment and specific embodiment one or two: sharp in step 2
It is 3500mg/L~5000mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, with distilled water, mud mixed liquid is obtained, to dirt
Metazoa is added in mud mixed liquor and carries out biological pretreatment, obtains metazoa treated sludge.Other and specific reality
It is identical to apply mode one or two.
Specific embodiment 4: unlike one of present embodiment and specific embodiment one to three: institute in step 2
When the metazoa stated is large-scale metazoa, metazoa is the immature phase polypide in growth and development stage, a length of 1cm of body
~1.5cm.It is other identical as specific embodiment one to three.
Specific embodiment 5: unlike one of present embodiment and specific embodiment one to four: institute in step 2
When the metazoa stated is large-scale metazoa, metazoa is the polypide in the maturity period, a length of 2.5cm of polypide body~
4.5cm.It is other identical as specific embodiment one to four.
Specific embodiment 6: unlike one of present embodiment and specific embodiment one to five: institute in step 2
It is then 22 DEG C~26 DEG C in temperature and dissolved oxygen concentration is 2.5mg/L~4mg/L when the metazoa stated is large-scale metazoa
Under conditions of, 17g~20g large size metazoa is added into every 1L mud mixed liquid, is handled 3 days~4 days.Other and specific reality
It is identical to apply mode one to five.
Specific embodiment 7: unlike one of present embodiment and specific embodiment one to six: institute in step 2
It is then 22 DEG C~24 DEG C and dissolution in temperature when the metazoa stated is the combination of large-scale metazoa and the type metazoa that swims
Under conditions of oxygen concentration is 3.5mg/L~4mg/L, 12g~16g large size metazoa is added into every 1L mud mixed liquid, and
2~5 type metazoas that swim are added in every 1mL mud mixed liquid, are handled 3 days~5 days.Other and specific embodiment one
It is identical to six.
Specific embodiment 8: unlike one of present embodiment and specific embodiment one to seven: in step 3 so
Afterwards under conditions of temperature is 45 DEG C~50 DEG C, acidolysis 25min~30min.It is other identical as specific embodiment one to seven.
Specific embodiment 9: unlike one of present embodiment and specific embodiment one to eight: in step 3 so
Afterwards under conditions of temperature is 40 DEG C~50 DEG C, acidolysis 20min~30min.It is other identical as specific embodiment one to eight.
Specific embodiment 10: unlike one of present embodiment and specific embodiment one to nine: institute in step 3
HCl concentration is 0.5mol/L~0.8mol/L in the acidolysis sludge solutions stated.It is other identical as specific embodiment one to nine.
Beneficial effects of the present invention are verified using following embodiment:
Embodiment one:
It is a kind of using metazoa promote sludge extract flocculant method be to sequentially include the following steps:
One, homogenize process is concentrated:
Sewage treatment plant is stood without the excess sludge of dehydration, 3h is precipitated, supernatant is removed, after taking concentrating and precipitating
Sludge, successively with the screen to filtrate of 4 mesh and 10 mesh remove impurity, obtain concentration homogeneous after sludge；
Two, metazoa biological treatment is utilized:
It is 4500mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water, obtains mud mixed liquid, obtains
Mud mixed liquid adds metazoa into mud mixed liquid and carries out biological pretreatment, obtains metazoa treated and is dirty
Mud；
The metazoa is the combination of water silk earthworm, tubificid and cercobranchiate earthworm, and in temperature be 22 DEG C and dissolved oxygen concentration is
Under conditions of 2.5mg/L, 17g metazoa is added into every 1L mud mixed liquid, is handled 4 days；
The metazoa is the immature phase polypide in growth and development stage, a length of 1cm~1.5cm of body；
Three, hot acid solution is handled:
By metazoa treated sludge condensation precipitating, then use strainer filtering, and remove supernatant so that sludge with
Sludge after separation is centrifuged 5min, removes supernatant, obtain by metazoa separation under conditions of revolving speed is 2500r/min again
To sludge solid content；The sludge solid water content of matter is 85%~90%；Quality percentage is added into 15g sludge solid content
Then the HCl solution that number is 36%, the sludge after obtaining acid adding add distilled water into the sludge after acid adding, obtain acidolysis dirt
Mud solution, the volume of the acidolysis sludge solutions are 100mL, then under conditions of temperature is 40 DEG C, acidolysis 30min, and acid
After solution under conditions of revolving speed is 10000r/min, it is centrifuged 10min, takes supernatant as flocculant, that is, after completing for utilizing
The method that lively object promotes sludge to extract flocculant；
HCl concentration is 1mol/L in the acidolysis sludge solutions.
According to universal method-kaolinite local method that flocculant measures, measuring flocculating rate is 75.3%.
Embodiment two:
It is a kind of using metazoa promote sludge extract flocculant method be to sequentially include the following steps:
One, homogenize process is concentrated:
Sewage treatment plant is stood without the excess sludge of dehydration, 2h is precipitated, supernatant is removed, after taking concentrating and precipitating
Sludge, successively with the screen to filtrate of 4 mesh and 10 mesh remove impurity, obtain concentration homogeneous after sludge；
Two, metazoa biological treatment is utilized:
It is 3500mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water, mud mixed liquid is obtained, to dirt
Metazoa is added in mud mixed liquor and carries out biological pretreatment, obtains metazoa treated sludge；
The metazoa is the combination of tubificid and water flea, and in temperature be 24 DEG C and dissolved oxygen concentration is 3.5mg/L's
Under the conditions of, 16g tubificid is added into every 1L mud mixed liquid, and 5 water fleas are added in every 1mL mud mixed liquid, handle 5 days；
The tubificid is in the polypide in maturity period, a length of 2.5cm~4.5cm of polypide body；
Three, hot acid solution is handled:
By metazoa treated sludge condensation precipitating, then use strainer filtering, and remove supernatant so that sludge with
Sludge after separation is centrifuged 5min, removes supernatant, obtain by metazoa separation under conditions of revolving speed is 2500r/min again
To sludge solid content；The sludge solid water content of matter is 85%~90%；Quality percentage is added into 20g sludge solid content
Then the HCl solution that number is 36%, the sludge after obtaining acid adding add distilled water into the sludge after acid adding, obtain acidolysis dirt
Mud solution, the volume of the acidolysis sludge solutions are 100mL, then under conditions of temperature is 45 DEG C, acidolysis 25min, and acid
After solution under conditions of revolving speed is 10000r/min, it is centrifuged 10min, takes supernatant as flocculant, that is, is completed lively after utilizing
The method that object promotes sludge to extract flocculant；
HCl concentration is 0.8mol/L in the acidolysis sludge solutions.
According to universal method-kaolinite local method that flocculant measures, measuring flocculating rate is 68.2%.
Comparative experiments:
The flocculant efficiency sludge that sludge organism lysis and hot acid solution are handled will be passed through in embodiment one extracted, and it is same
It is compared under sludge concentration using only the extracted flocculant efficiency of sludge that the hot acid solution of same parameter is handled, without rear
The flocculating rate that the sludge of lively object biological treatment finally obtains is lower by 16.4% than the flocculant flocculating rate that embodiment one is extracted, because
This, metazoa biological treatment and the combination of hot acid solution can obtain more preferably flocculating rate, significantly improve sludge base flocculant effect
Rate.
Residue of the sewage treatment plant without dehydration described in the embodiment described one, embodiment two and comparative experiments
Sludge is excess sludge of the sewage treatment plant of Harbin City without dehydration.
Claims (10)
1. a kind of method for promoting sludge to extract flocculant using metazoa, it is characterised in that a kind of to be promoted using metazoa
The method that sludge extracts flocculant is to sequentially include the following steps:
One, homogenize process is concentrated:
Sewage treatment plant is stood without the excess sludge of dehydration, 2h~3h is precipitated, supernatant is removed, after taking concentrating and precipitating
Sludge, successively with the screen to filtrate of 4 mesh and 10 mesh remove impurity, obtain concentration homogeneous after sludge；
Two, metazoa biological treatment is utilized:
It is 3000mg/L~5000mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water, obtains sludge mixing
Liquid adds metazoa into mud mixed liquid and carries out biological pretreatment, obtains metazoa treated sludge；
If the metazoa is large-scale metazoa, in temperature be 22 DEG C~26 DEG C and dissolved oxygen concentration is 2mg/L
Under conditions of~4mg/L, 12g~20g large size metazoa is added into every 1L mud mixed liquid, is handled 3 days~5 days；
If the metazoa is small-sized metazoa, in temperature be 22 DEG C~26 DEG C and dissolved oxygen concentration is greater than 2mg/
Under conditions of L, 50~200 small-sized metazoas are added into every 1mL mud mixed liquid, are handled 3 days~5 days；
It is 22 DEG C~26 DEG C in temperature if the metazoa is the combination of large-scale metazoa and small-sized metazoa
And under conditions of dissolved oxygen concentration is 2mg/L~4mg/L, added into every 1L mud mixed liquid 12g~20g it is large-scale after it is lively
Object, and 10~100 small-sized metazoas are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
It is 22 DEG C~26 in temperature if the metazoa is the combination of large-scale metazoa and the type metazoa that swims
DEG C and under conditions of dissolved oxygen concentration is 3.5mg/L~4mg/L, added into every 1L mud mixed liquid 12g~20g it is large-scale after it is raw
Animal, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
It is 22 DEG C~26 in temperature if the metazoa is the combination of small-sized metazoa and the type metazoa that swims
DEG C and dissolved oxygen concentration be greater than under conditions of 3.5mg/L, added into every 1mL mud mixed liquid 50~200 it is small-sized after it is raw
Animal, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days；
The large-scale metazoa is one of water silk earthworm, tubificid and cercobranchiate earthworm or in which several combinations；Described is small
Type metazoa is Piao body worm；The type metazoa that swims is water flea；
Three, hot acid solution is handled:
By metazoa treated sludge condensation precipitating, strainer filtering is then used, and remove supernatant, so that sludge and rear raw
Animal separation is centrifuged 5min~10min by the sludge after separation under conditions of revolving speed is 2500r/min~3000r/min,
Supernatant is removed, sludge solid content is obtained；The sludge solid water content of matter is 85%~90%；It is solid to 10g~20g sludge
The HCl solution that mass percent is 30%~36%, the sludge after obtaining acid adding, then to the sludge after acid adding are added in shape object
Middle addition distilled water obtains acidolysis sludge solutions, and the volume of the acidolysis sludge solutions is 100mL, is then 30 in temperature
DEG C~50 DEG C under conditions of, acidolysis 20min~30min, after acidolysis revolving speed be 8000r/min~10000r/min condition
Under, it is centrifuged 10min~15min, takes supernatant as flocculant, that is, completes to promote sludge to extract flocculant using metazoa
Method；
HCl concentration is 0.5mol/L~1mol/L in the acidolysis sludge solutions.
2. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
It is 4500mg/L~5000mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water in step 2, and it is mixed to obtain sludge
Liquid is closed, metazoa is added into mud mixed liquid and carries out biological pretreatment, obtains metazoa treated sludge.
3. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
It is 3500mg/L~5000mg/L that the sludge after homogeneous is concentrated, which is diluted to concentration, using distilled water in step 2, and it is mixed to obtain sludge
Liquid is closed, metazoa is added into mud mixed liquid and carries out biological pretreatment, obtains metazoa treated sludge.
4. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
When metazoa described in step 2 is large-scale metazoa, metazoa is the unaging time insect in growth and development stage
Body, a length of 1cm~1.5cm of body.
5. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
When metazoa described in step 2 is large-scale metazoa, metazoa is the polypide in the maturity period, and polypide body is a length of
2.5cm~4.5cm.
6. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
It is then 22 DEG C~26 DEG C in temperature and dissolved oxygen concentration is when metazoa described in step 2 is large-scale metazoa
Under conditions of 2.5mg/L~4mg/L, 17g~20g large size metazoa, processing 3 days~4 are added into every 1L mud mixed liquid
It.
7. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
When metazoa described in step 2 is the combination of large-scale metazoa and the type metazoa that swims, then temperature be 22 DEG C~
Under conditions of 24 DEG C and dissolved oxygen concentration are 3.5mg/L~4mg/L, added into every 1L mud mixed liquid 12g~16g it is large-scale after
Lively object, and 2~5 type metazoas that swim are added in every 1mL mud mixed liquid, it handles 3 days~5 days.
8. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
In step 3 then under conditions of temperature is 45 DEG C~50 DEG C, acidolysis 25min~30min.
9. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
In step 3 then under conditions of temperature is 40 DEG C~50 DEG C, acidolysis 20min~30min.
10. a kind of method for promoting sludge to extract flocculant using metazoa according to claim 1, it is characterised in that
HCl concentration is 0.5mol/L~0.8mol/L in acidolysis sludge solutions described in step 3.
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