CN107758842A - Microbe carrier and its manufacturing process for biofilm - Google Patents

Microbe carrier and its manufacturing process for biofilm Download PDF

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Publication number
CN107758842A
CN107758842A CN201610678499.0A CN201610678499A CN107758842A CN 107758842 A CN107758842 A CN 107758842A CN 201610678499 A CN201610678499 A CN 201610678499A CN 107758842 A CN107758842 A CN 107758842A
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CN
China
Prior art keywords
parts
biofilm
microbe carrier
magnetic
density polyethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610678499.0A
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Chinese (zh)
Inventor
唐新亮
乐淑荣
宋小林
况定文
温文鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHONGHAI ASPHALT (TAIZHOU) CO Ltd
Original Assignee
ZHONGHAI ASPHALT (TAIZHOU) CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201610678499.0A priority Critical patent/CN107758842A/en
Publication of CN107758842A publication Critical patent/CN107758842A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The present invention discloses a kind of microbe carrier and its manufacturing process for biofilm, and the microbe carrier for biofilm is made up of the component of following parts by weight：65 ~ 75 parts of high density polyethylene (HDPE), 5 ~ 15 parts of white lime, 5 ~ 20 parts of Tao Shi Powdered Activated Carbons, 6 ~ 10 parts of precipitated calcium carbonate, 3 ~ 5 parts of maleic anhydride, 0.2 ~ 0.6 part of cumyl peroxide, 1.5 ~ 3 parts of gelatin, 1 ~ 2 part of chitin, 0.5 ~ 2 part of magnetic；The density of the microbe carrier for biofilm is 0.96~0.98g/cm3.Biofilm speed of the present invention is fast, it is difficult for drop-off, treatment effeciency is high, the processing of low-concentration organic and ammonia nitrogen suitable for sewage, low-concentration organic waste water, the biologic packing material of the present invention has extremely strong hydrophily and bioaffinity, and filler has very strong adsorption strength to biomembrane in itself, is advantageous to the retention and accumulation of biomass on filling carrier.

Description

Microbe carrier and its manufacturing process for biofilm
Technical field
The present invention relates to a kind of microbe carrier for biofilm, the sewage disposal belonged in environmental engineering
Technical field.
Background technology
Biomembrance process sewage disposal is microorganism such as nitrifier and denitrifying bacterium is anchored at filler surface, in membranaceous life It is long, to realize the technology of sewage disposal.Biofilter, biological rotating disk, biological contact oxidation process etc. are generally can be divided into, although they Structural difference it is very big, but its general principle is identical, i.e., by contact of the waste water with biomembrane, carries out the mass transfer of solid-liquid two-phase, The biodegradation of organic matter is carried out by biomembrane, waste water is purified.Biomembrance process has higher treatment effeciency, for There is obvious effect by organic matter and ammonia nitrogen slight pollution water body.But the microorganism colonization technology of biomembrance process does not have also in the presence of many Solve the problems, such as.
Subject matter is as follows：On the one hand, filler frequently encountered in blocking, conglomeration, it is hardened the problems such as, have impact on biology Treatment effect.And above-mentioned filler is both needed to be arranged on auxiliary stand, the inconveniences such as filler installation, replacing are caused；On the other hand, Prior art filler product, because specific surface area is small, hydrophilicity and bioaffinity are poor, cause in biofilm speed, biofilm Shortcomings in terms of amount and the tight ness rating of film and filler；Secondly as pollutional load is relatively low, and microorganism growth restriction system, growth Speed is slow, also causes to be not easy to bio-film colonization.
The content of the invention
It is an object of the present invention to provide a kind of microbe carrier for biofilm, and this is used for the microbe carrier biofilm speed of biofilm Degree is fast, difficult for drop-off, and treatment effeciency is high, the processing of low-concentration organic and ammonia nitrogen suitable for sewage, low-concentration organic waste water, The biologic packing material of the present invention has extremely strong hydrophily and bioaffinity, and filler has very strong absorption to biomembrane in itself Intensity, is advantageous to the retention and accumulation of biomass on filling carrier, therefore can well adapt at the waste water under low consistency conditions Reason；Simultaneously, there is provided a kind of preparation method of the above-mentioned microbe carrier for biofilm.
To reach above-mentioned purpose, the first technical scheme that the present invention uses is：A kind of microbe carrier for biofilm, its It is characterised by：The microbe carrier for biofilm is made up of the component of following parts by weight：
60 ~ 70 parts of high density polyethylene (HDPE),
10 ~ 15 parts of acrylic resin,
6 ~ 8 parts of low density polyethylene (LDPE),
8 ~ 10 parts of bamboo carbon powder,
4 ~ 6 parts of wood powder,
2 ~ 3 parts of lignin,
2 ~ 3 parts of dichloromethane,
1 ~ 2 part of diethyl guanidine sulfate,
0.5 ~ 1 part of N, N'- ethylene bis stearamide,
3 ~ 5 parts of maleic anhydride,
0.2 ~ 0.6 part of cumyl peroxide,
1.5 ~ 3 parts of gelatin,
1 ~ 2 part of magnetic,
0.5 ~ 1 part of pentaerythritol stearate；
The density of the microbe carrier for biofilm is 0.96~0.98g/cm3；
The magnetic is mixed by ferroso-ferric oxide, chromium dioxide.
Further improved technical scheme is as follows in above-mentioned technical proposal：
Preferably, the ferroso-ferric oxide, chromium dioxide mix according to 10 ~ 3 ~ 5 weight ratio.
Preferably, the bamboo carbon powder, wood powder and lignin are according to 10：5：2.5 parts by weight mix.
The second technical scheme that the present invention uses is：A kind of preparation method for being used for the microbe carrier for biofilm, bag Include following steps：
Step 1: take 60 ~ 70 parts of high density polyethylene (HDPE), 10 ~ 15 parts of acrylic resin, 6 ~ 8 parts of low density polyethylene (LDPE), dichloromethane 2 ~ 3 parts of alkane, 1 ~ 2 part of diethyl guanidine sulfate, N, 0.5 ~ 1 part of N'- ethylene bis stearamides, 3 ~ 5 parts of maleic anhydride, peroxidating two 0.2 ~ 0.6 part of isopropylbenzene, 1.5 ~ 3 parts of gelatin, 1 ~ 2 part of magnetic, 0.5 ~ 1 part of pentaerythritol stearate, it is placed in mixer high Speed stirs, and after temperature is slowly raised to 120 DEG C, stirring at low speed is cooled to 40 DEG C, adds 5 ~ 10 parts of bamboo carbon powder, timber 4 ~ 6 parts of powder, 5 ~ 8 parts of lignin are evenly stirred until room temperature；
Step 2: above-mentioned solid material is put into double screw extruder, melting extrusion is granulated；
Step 3: again putting into the particle produced above in 45 type single screw extrusion machines, by extrusion die extrusion forming, obtain Filler be cylinder, axial cross reinforcing rib is set in it, sets axially radial fin on cylinder outer wall.
Further improved technical scheme is as follows in above-mentioned technical proposal：
Preferably, mesh number is more than 200 mesh after the magnetic crushes.
Because above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art：
1st, the present invention is used for microbe carrier of biofilm and preparation method thereof, and it further uses high density polyethylene (HDPE) 60 in being formulated Resin material based on ~ 70 parts of 10 ~ 15 parts of acrylic resins of collocation, 6 ~ 8 parts of low density polyethylene (LDPE)s, 3 ~ 5 parts of maleic anhydride of addition, Cumyl peroxide and gelatin, the contact angle of sewage and carrier is reduced, improve the hydrophily and impact resistance of carrier, make Microorganism is easier to be attached on carrier, and hydrophilic bio-carrier specific surface area is big, adsorptivity is extremely strong, and carrier can be prevented in water The microbial film of outer surface attachment comes off because being rubbed between carrier, short the time required to biofilm, improves waste water treatment efficiency, ammonia nitrogen Clearance, more than 78%, therefore can well adapt to the wastewater treatment under low consistency conditions more than 92%, COD clearances；Next, its 0.5 ~ 2 part of magnetic combines 0.5 ~ 1 part of pentaerythritol stearate in formula, is advantageous to improve the biofilm amount of carrier biofilm.
2nd, the present invention is used for microbe carrier and preparation method thereof of biofilm, its high density polyethylene (HDPE), acrylic resin, Bamboo carbon powder, wood powder, lignin are further added in low density polyethylene (LDPE), filler is not only improved and produces absorption affinity, increase The adsorbance on filler surface, it is also beneficial to microorganism and quickly colonizes growth in early days, and strengthen biomembrane adsorption strength, is not easy to take off Fall.
3rd, the present invention is used for microbe carrier of biofilm and preparation method thereof, addition dichloromethane of being arranged in pairs or groups in its its system, Diethyl guanidine sulfate, N, N'- ethylene bis stearamides and magnetic, the porous space of specific structure can be formed, with stronger magnetic Property form magnetization effect, improve Pollutants in Wastewater conversion rate and efficiency, improve the activity of microorganism, microorganism is through magnetic in water After change effect, the microorganism for adapting to survive has bigger propagation and metabolic capability so that organic pollution is in low-intensity magnetic field In the presence of, acted on by magnetic force key, magnetic force, Lorentz force and mangneto cavity effect etc. and gather through magnetic, adsorb, being enriched to magnetic Biologic packing material surface, oxygen are paramagnets, can be adsorbed under magnetic fields near biologic packing material during aeration, increase filler The oxygen concentration on surface, promote the breeding of aerobe, in addition the work of activity and enzymatic activity of the low-intensity magnetic field also with inducing microbial With, substantially reduce power stirring energy consumption, improve filler the effect of.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment 1 ~ 4：A kind of microbe carrier for biofilm, the microbe carrier for biofilm is by following parts by weight Component forms, as shown in table 1：
Table 1
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4
60 ~ 70 parts of high density polyethylene (HDPE) 66 parts 65 parts 62 parts 70 parts
10 ~ 15 parts of acrylic resin 15 parts 12 parts 10 parts 14 parts
6 ~ 8 parts of low density polyethylene (LDPE) 7 parts 6 parts 8 parts 8 parts
8 ~ 10 parts of bamboo carbon powder 8 parts 9 parts 8.5 part 10 parts
4 ~ 6 parts of wood powder 4 parts 5 parts 6 parts 5.5 part
2 ~ 3 parts of lignin 2.5 part 2.2 part 3 parts 2.4 part
2 ~ 3 parts of dichloromethane 2.8 part 2.6 part 2 parts 2.2 part
1 ~ 2 part of diethyl guanidine sulfate 1.8 part 1.6 part 1 part 1.2 part
0.5 ~ 1 part of N, N'- ethylene bis stearamide 0.8 part 0.5 part 1 part 0.6 part
3 ~ 5 parts of maleic anhydride 4 parts 5 parts 3.8 part 4.6 part
0.2 ~ 0.6 part of cumyl peroxide 0.5 part 0.6 part 0.3 part 0.35 part
1.5 ~ 3 parts of gelatin 1.8 part 2.5 part 2.2 part 2 parts
1 ~ 2 part of magnetic 2 parts 1.6 part 1 part 1.5 part
0.5 ~ 1 part of pentaerythritol stearate 0.6 part 0.8 part 1 part 0.6 part
The density of the above-mentioned microbe carrier for biofilm is 0.96~0.98g/cm3。
Note：Ferroso-ferric oxide, chromium dioxide mix according to 10 ~ 3 weight ratio in embodiment 1；In embodiment 2 Ferroso-ferric oxide, chromium dioxide mix according to 10 ~ 5 weight ratio；Ferroso-ferric oxide, chromium dioxide in embodiment 3 Mixed according to 10 ~ 3.5 weight ratio；Ferroso-ferric oxide in embodiment 4, chromium dioxide according to 10 ~ 4.5 parts by weight Ratio mixes.
Above-mentioned bamboo carbon powder, wood powder and lignin are according to 10：5：2.5 parts by weight mix.
A kind of preparation method for the above-mentioned microbe carrier for biofilm, comprise the following steps：
Step 1: take 60 ~ 70 parts of high density polyethylene (HDPE), 10 ~ 15 parts of acrylic resin, 6 ~ 8 parts of low density polyethylene (LDPE), dichloromethane 2 ~ 3 parts of alkane, 1 ~ 2 part of diethyl guanidine sulfate, N, 0.5 ~ 1 part of N'- ethylene bis stearamides, 3 ~ 5 parts of maleic anhydride, peroxidating two 0.2 ~ 0.6 part of isopropylbenzene, 1.5 ~ 3 parts of gelatin, 1 ~ 2 part of magnetic, 0.5 ~ 1 part of pentaerythritol stearate, it is placed in mixer high Speed stirs, and after temperature is slowly raised to 120 DEG C, stirring at low speed is cooled to 40 DEG C, adds 5 ~ 10 parts of bamboo carbon powder, timber 4 ~ 6 parts of powder, 5 ~ 8 parts of lignin are evenly stirred until room temperature；
Step 2: above-mentioned solid material is put into double screw extruder, melting extrusion is granulated；
Step 3: again putting into the particle produced above in 45 type single screw extrusion machines, by extrusion die extrusion forming, obtain Filler be cylinder, axial cross reinforcing rib is set in it, sets axially radial fin on cylinder outer wall.
Mesh number is more than 200 mesh after above-mentioned magnetic crushes.
Take the product of same amount of embodiment 1 ~ 4 to be followed successively by A, B, C, D and be put into water to soak, the time is 5 hours, then Take out and stand 30min, determine moisture content.Product A, B, C, D moisture content are respectively 17.5,17.8,17.6,17.8,11.8, 12.5、13.2.Measure calculating with contact angle instrument, product A, B, C, D, E, F, G contact angle is respectively 62 °, 61 °, 63°、62°、73°、75°、82°.As a result show that the hydrophilicity of suspended biological filler prepared by the present invention is greatly improved.
Product A, B, C, D of same amount of embodiment and comparative example acquisition are taken, 4 parallel bioreactors is placed in and carries out Experiment.Sludge and waste water are certain chemical engineering sewage processing unit bio-chemical effluent, are entered wherein testing in MBBR OK, floating stuffing filling rate is 40%, pH 6.3-7.6, and temperature is 20-30 DEG C, C/N/P=100：5：1, DO=1.5 ~ 3mg/L's Under the conditions of, hydraulic detention time 5h, as a result as shown in table 1.
The filler A-E of table 2 result of the test
Filling kind Biofilm time (d） Water outlet COD（mg/L) Water outlet ammonia nitrogen (mg/L) COD clearances（%） Ammonia nitrogen removal frank（%）
A 11 40 3 ,80.5 95
B 12 37 2 81 96
C 12 39 3 80 94
D 11 37 2 82 95
From table 2, the biologic packing material biofilm time prepared by the inventive method substantially shortens, and the clearance of COD and ammonia nitrogen is obvious Improve.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, it should all be included within the scope of the present invention.

Claims (5)

  1. A kind of 1. microbe carrier for biofilm, it is characterised in that：The microbe carrier for biofilm is by following weight The component composition of part：
    60 ~ 70 parts of high density polyethylene (HDPE),
    10 ~ 15 parts of acrylic resin,
    6 ~ 8 parts of low density polyethylene (LDPE),
    8 ~ 10 parts of bamboo carbon powder,
    4 ~ 6 parts of wood powder,
    2 ~ 3 parts of lignin,
    2 ~ 3 parts of dichloromethane,
    1 ~ 2 part of diethyl guanidine sulfate,
    0.5 ~ 1 part of N, N'- ethylene bis stearamide,
    3 ~ 5 parts of maleic anhydride,
    0.2 ~ 0.6 part of cumyl peroxide,
    1.5 ~ 3 parts of gelatin,
    1 ~ 2 part of magnetic,
    0.5 ~ 1 part of pentaerythritol stearate；
    The density of the microbe carrier for biofilm is 0.96~0.98g/cm3；
    The magnetic is mixed by ferroso-ferric oxide, chromium dioxide.
  2. 2. the microbe carrier according to claim 1 for biofilm, it is characterised in that：The ferroso-ferric oxide, dioxy Change chromium to mix according to 10 ~ 3 ~ 5 weight ratio.
  3. 3. the microbe carrier according to claim 1 for biofilm, it is characterised in that：The bamboo carbon powder, wood powder End is with lignin according to 10：5：2.5 parts by weight mix.
  4. A kind of 4. microbe carrier and its manufacturing process for biofilm for described in claim 1, it is characterised in that：Including Following steps：
    Step 1: take 60 ~ 70 parts of high density polyethylene (HDPE), 10 ~ 15 parts of acrylic resin, 6 ~ 8 parts of low density polyethylene (LDPE), dichloromethane 2 ~ 3 parts of alkane, 1 ~ 2 part of diethyl guanidine sulfate, N, 0.5 ~ 1 part of N'- ethylene bis stearamides, 3 ~ 5 parts of maleic anhydride, peroxidating two 0.2 ~ 0.6 part of isopropylbenzene, 1.5 ~ 3 parts of gelatin, 1 ~ 2 part of magnetic, 0.5 ~ 1 part of pentaerythritol stearate, it is placed in mixer high Speed stirs, and after temperature is slowly raised to 120 DEG C, stirring at low speed is cooled to 40 DEG C, adds 5 ~ 10 parts of bamboo carbon powder, timber 4 ~ 6 parts of powder, 5 ~ 8 parts of lignin are evenly stirred until room temperature；
    Step 2: above-mentioned solid material is put into double screw extruder, melting extrusion is granulated；
    Step 3: again putting into the particle produced above in 45 type single screw extrusion machines, by extrusion die extrusion forming, obtain Filler be cylinder, axial cross reinforcing rib is set in it, sets axially radial fin on cylinder outer wall.
  5. 5. the microbe carrier and its manufacturing process according to claim 1 for biofilm, it is characterised in that：The magnetic Mesh number is more than 200 mesh after powder crushes.
CN201610678499.0A 2016-08-17 2016-08-17 Microbe carrier and its manufacturing process for biofilm Pending CN107758842A (en)

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
CN107758842A true CN107758842A (en) 2018-03-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111847642A (en) * 2020-06-30 2020-10-30 桂林理工大学 High-flow carrier material for water treatment microorganisms, preparation method and water treatment method
CN114806022A (en) * 2022-06-08 2022-07-29 中国科学院青岛生物能源与过程研究所 Positively charged biological filler and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105621595A (en) * 2016-01-27 2016-06-01 苏州科环环保科技有限公司 Hydrophilic carrier for microbial biofilm formation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105621595A (en) * 2016-01-27 2016-06-01 苏州科环环保科技有限公司 Hydrophilic carrier for microbial biofilm formation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
可龙主编: "《精细化学品技术手册》", 30 June 1994 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111847642A (en) * 2020-06-30 2020-10-30 桂林理工大学 High-flow carrier material for water treatment microorganisms, preparation method and water treatment method
CN114806022A (en) * 2022-06-08 2022-07-29 中国科学院青岛生物能源与过程研究所 Positively charged biological filler and preparation method thereof

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