CN109264852A - A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization - Google Patents

A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization Download PDF

Info

Publication number
CN109264852A
CN109264852A CN201811473114.2A CN201811473114A CN109264852A CN 109264852 A CN109264852 A CN 109264852A CN 201811473114 A CN201811473114 A CN 201811473114A CN 109264852 A CN109264852 A CN 109264852A
Authority
CN
China
Prior art keywords
oxygen release
release agent
creek
environment friendly
sodium humate
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
CN201811473114.2A
Other languages
Chinese (zh)
Inventor
陈涛
晏波
林翰志
李亮
王明辉
徐立成
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.)
Guangzhou Institute of Geochemistry of CAS
Original Assignee
Guangzhou Institute of Geochemistry of CAS
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
Application filed by Guangzhou Institute of Geochemistry of CAS filed Critical Guangzhou Institute of Geochemistry of CAS
Priority to CN201811473114.2A priority Critical patent/CN109264852A/en
Publication of CN109264852A publication Critical patent/CN109264852A/en
Pending legal-status Critical Current

Links

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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/40—Protecting water resources
    • Y02A20/402—River restoration
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Abstract

The invention discloses a kind of preparation processes of high-efficiency environment friendly oxygen release agent for creek in-situ immobilization.The slow oxygen release agent of novel environment friendly is prepared by embedding techniques such as ball processed, drying and shapings using environmental protection materials such as sodium humate, zeolite, bentonites in the present invention.Specific process method step includes: 1) to use zeolite, bentonite etc. for packing material, and sodium humate solution is embedding medium, powdery CaO2For oxygen release source；2) zeolite and bentonite, powdery CaO of the particle size range for 0.5mm-1mm range are selected2, mechanical stirring is uniform, and adds mass fraction into the material after mixing and be 5% sodium humate solution, and stir evenly；3) by the material for being sufficiently mixed wetting with pelletizer pelletizing, and oxygen release agent is made after being formed by freeze-day with constant temperature.The present invention reduces the economic cost in preparation process using natural inexpensive innoxious raw material, and can control no pollution in preparation and application and discharge, and has high economic benefit and environmental benefit.

Description

A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization
Technical field
The invention belongs to water body in-situ chemical remediation fields, more particularly to a kind of preparation of new and effective compound oxygen release agent Technique has good lasting oxygen release performance by oxygen release agent prepared by this technique, and furthermore used additive is environmental protection Type additive avoids prepared product and causes secondary pollution to environment.
Background technique
Cities and towns creek carries the important function such as urban water supply, landscape water and water resource ecological circulation.Currently, China river It gushes infrastructure construction and lags behind town development, occurring creek generally, mud increases, section narrows, Ecology function is weak With hydrophobic ability decline etc. a series of water environment degradation problems.In order to solve the problems, such as creek anaerobic environment, using traditional oxygenation Measure there are expensive equipment, long construction period, it is complicated for operation, maintenance cost is high the problems such as.Therefore water can not destroyed by finding Under conditions of ecological natural recycles, quick, easy, safely, effectively can improve Dissolved Oxygen in Water content just becomes reparation water body master Want limiting factor.
CaO2It can react and oxygen release, can promote aerobic micro- in wet condition as a kind of environmentally friendly compound Biological growth strengthens the degradation to pollutant.But powdered CaO2With very big specific surface area, discharged with water body fast reaction Oxygen be difficult to be made full use of by aerobic microbiological and led to the wasting of resources, effective oxygen release time is too short and is difficult to remain aerobic micro- Progress of the biology to water remediation.Meanwhile generating excessive alkaline matter in the short time and causing water body pH raising too fast, can also it press down Microbial activity processed, reduces CaO2Utilization efficiency.Therefore, select suitable mode to CaO2It is transformed or fixes, reach The elevated-levels effect for reducing its specific surface area, increasing the oxygen release time, reducing pH.
Some researches show that the oxygen release times that oxidant can be improved using investment, improve the service efficiency of oxidant, but institute The embedding medium used is mostly polyvinyl alcohol (PVA), polyethylene glycol (PEG) and cement etc. for embedding medium or binder, there is embedding Agent is difficult to degrade, easy aggregation, promotes heavy metal release and increase secondary environmental problems, the cement such as water body foam to be difficult to degrade, easily subtract Small size pond storage capacity, is unfavorable for microbe survival, to cause the secondary pollution of creek water body.
In addition, the preparation process of embedding medium is caused frequently with tablet forming technique so that oxidant oxygen-producing amount is far below theoretical value Oxidant utilization is lower.Again, product specific gravity prepared by tabletting is larger, often sinks to bed mud bottom immediately after the application, and Bed mud bottom causes oxygen release agent not play oxidation and is converted into creek bed mud since hydraulic disturbance is smaller.
Currently, water is met in market creek oxygen release agent reacts extremely rapid and easy appearance floating agglomeration, oxygen utilization is caused The problems such as rate is low, the oxygen release time is short, pH ascensional range is big and oxygen release is ineffective, and the preparation process that uses of common oxygen release agent and It is ineffective and the problems such as easily cause secondary environmental pollution to there is oxygen release in raw material.
Summary of the invention
It is of the existing technology in order to solve the problems, such as, it releases the purpose of the present invention is to provide a kind of novel high-efficiency environment friendly is compound Oxygen agent is prepared using environmental protection materials such as sodium humate, zeolite, bentonites by embedding techniques such as ball processed, drying and shapings The slow oxygen release agent of novel environment friendly, can be used for the in-situ immobilization of creek water body.
It is a further object of the present invention to provide a kind of preparation method of above-mentioned compound oxygen release agent of novel high-efficiency environment friendly, oxygen release mistakes The features such as journey is more slow, improves oxygen utilization rate, prevents waste of oxygen, and method of application is simple.
The object of the invention to solve the technical problems adopts the following technical solutions to realize.It proposes according to the present invention A kind of high-efficiency environment friendly oxygen release agent for creek in-situ immobilization preparation process, including processing method below and step:
1) raw material is than choosing: use zeolite, bentonite for main packing material, sodium humate (Na-A) solution is embedding medium, Powdery CaO2For oxygen release source；
2) raw material mixes: selecting zeolite and bentonite, powdery CaO of the particle size range for 0.5mm-1mm2, mechanical stirring is equal It is even, and add mass fraction into the material after mixing and be 5% sodium humate solution, and stir evenly；
3) mechanical balling-up and drying and shaping: by the material for being sufficiently mixed wetting with pelletizer pelletizing, and pass through freeze-day with constant temperature Sizing is that this technique prepares resulting oxygen release agent after sizing.
The preparation process of the above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, in step 1), powdery CaO2, boiling Stone, bentonitic mass ratio are respectively (5.5-8): (2-3): (1-1.5).
The preparation process of the above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, in step 1), sodium humate solution Purifying process are as follows:
Sodium humate is raw material by low-grade coal (it is required that its content of humic acid is greater than 50%), and addition caustic soda, (pH value reaches water To 9 to 11), heating extracting is centrifuged removing slag, and solution is dry.
The preparation process of the above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, in step 1), used CaO2It is pure Degree is greater than 50%, and sodium humate need to purify to purity greater than 35%, and sodium humate need to be washed to neutrality.
The preparation process of the above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, in step 2), used CaO2It is pure Degree is greater than 50%, and sodium humate need to purify to purity greater than 35%, and sodium humate need to be washed to neutrality.
The preparation process of the above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, in step 2), mass fraction 5% The additional amount of sodium humate solution is the 20%-25% of dry powder weight after mixing.
The preparation process of the above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, in step 3), sample is uniformly mixed Rotating cylinder is used afterwards, moist powder raw material is developed by particle by the effect of waving and iron wire sieve, grain diameter exists 5mm-10mm, shift-in drying constant weight, drying temperature are no more than 90 DEG C rapidly after spherical particles object is prepared into.
Furthermore, the present invention also provides a kind of preparations of above-mentioned high-efficiency environment friendly oxygen release agent for creek in-situ immobilization Compound oxygen release agent obtained by technique.
By above-mentioned technical proposal, the invention has the advantages that and the utility model has the advantages that
1) oxygen release process is more slow, improves oxygen utilization rate, prevents waste of oxygen；The features such as method of application is simple；
2) raw material inexpensive using green prevent to introduce secondary pollution compound to water body；It is prepared by this technique Oxygen release agent has good lasting oxygen release performance, and furthermore used additive is environment protection additive, avoids prepared Product secondary pollution is caused to environment；
3) present invention reduces the economic cost in preparation process, and can control using natural inexpensive innoxious raw material No pollution discharge, has high economic benefit and environmental benefit in system preparation and application.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Fig. 2 is schematic diagram of sealing device.
Fig. 3 is test effect comparison diagram.
Specific embodiment
Below by way of specific preferred embodiment combination attached drawing, invention is further described in detail, but the present invention and not only It is limited to embodiment below.
The present invention prepares new and effective compound oxygen release in conjunction with novel embedding techniques using raw material present in nature Agent, and its economy is evaluated by enterprise's relevant parameter.
A kind of preparation process of the compound oxygen release agent for creek in-situ immobilization comprising the steps of:
1) raw material is than choosing: using zeolite, bentonite for packing material, sodium humate (Na-A) solution is embedding medium, powdery CaO2For oxygen release source；Powdery CaO2, zeolite, bentonitic mass ratio be respectively (5.5-8): (2-3): (1-1.5).
Wherein, the preparation process of sodium humate (Na-A) solution specifically: sodium humate is by low-grade coal (it is required that its humic 50%) it is raw material that acid content, which is greater than, caustic soda, water (pH value reaches 9 to 11) is added, and heating extracting is centrifuged removing slag, Solution is dry.
2) raw material mixes: selecting particle size range for the zeolite of 0.5mm-1mm and bentonite, the powdery CaO of 0.5mm-1mm2, Mechanical stirring is uniform, and adds mass fraction into the material after mixing and be 5% sodium humate solution, and stir evenly；It is rotten The additional amount for growing acid sodium solution is the 20%-25% of dry powder weight after mixing.
3) mechanical balling-up and drying and shaping: by the material for being sufficiently mixed wetting with pelletizer pelletizing, sample is after mixing Using rotating cylinder, moist powder raw material is developed by particle by the effect of waving and iron wire sieve, grain diameter is in 5mm- 10mm, and by freeze-day with constant temperature be formed, drying temperature be no more than 90 DEG C, the oxygen release agent after sizing be this technique prepare it is resulting Finished product.
New and effective compound oxygen release agent of the invention is mainly characterized by: oxygen release slow release effect is prominent, can effectively improve Oxygen utilization rate；Using the inexpensive raw material of green, prevent to introduce secondary pollution to water body；The product being prepared has certain Expansion character, and specific gravity is lighter, ensure that the oxidant utilization of product.
Embodiment 1
A kind of preparation process of the compound oxygen release agent for creek in-situ immobilization comprising the steps of:
1) raw material is than choosing: using zeolite, bentonite etc. for packing material, sodium humate (Na-A) solution is embedding medium, powder Shape CaO2For oxygen release source；Powdery CaO2, zeolite, bentonitic mass ratio be respectively 5.5:2:1；
2) raw material mixes: selecting particle size range for the zeolite of 0.5mm-1mm and bentonite, the powdery CaO of 0.5mm-1mm2, Mechanical stirring is uniform, and adds mass fraction into the material after mixing and be 5% sodium humate solution, and stir evenly；It is rotten The additional amount for growing acid sodium solution is 20% of dry powder weight after mixing；
3) mechanical balling-up and drying and shaping: by the material for being sufficiently mixed wetting with pelletizer pelletizing, sample is after mixing Using rotating cylinder, moist powder raw material is developed by particle by the effect of waving and iron wire sieve, grain diameter in 5mm, And be formed by freeze-day with constant temperature, it is in the colour of loess that drying temperature, which is no more than 90 DEG C, and the oxygen release agent product cut size after sizing is 5mm-15mm Color.
Effete test embodiment 1
Experiment is using self-control sealing device (see Fig. 2), which is cylindrical body, internal diameter 10cm, high 14cm, and volume is 1.1L, bed mud packed height is 4cm in device, infuses river water (1L) later, is placed in sealing in 25 DEG C of constant temperature camera bellows and keeps 10d, most Backward experimental group adds ORC, and control group does not add ORC, and every group of experiment sets three Duplicate Samples, the real time measure overlying water dissolved oxygen (DO) variation, test result is as shown in Figure 3.
As seen from Figure 3, powdered CaO2Only it can effectively extend sample week using embedding techniques with regard to complete oxygen release in 4h Phase.Control group is that the polyvinyl alcohol (PVA) used is prepared, and is shown by comparative analysis made using the embodiment of the present invention Standby oxygen release agent oxygen-producing amount is essentially identical with theoretical value, illustrates that the oxygen release agent of present invention process preparation can effectively guarantee oxidant Efficiency.
Embodiment 2
A kind of preparation process of the compound oxygen release agent for creek in-situ immobilization comprising the steps of:
1) raw material is than choosing: using zeolite, bentonite etc. for packing material, sodium humate (Na-A) solution is embedding medium, powder Shape CaO2For oxygen release source；Powdery CaO2, zeolite, bentonitic mass ratio be respectively 7.0:2.5:1.2；
2) raw material mixes: selecting particle size range for the zeolite of 0.5mm-1mm and bentonite, the powdery CaO of 0.5mm-1mm2, Mechanical stirring is uniform, and adds mass fraction into the material after mixing and be 5% sodium humate solution, and stir evenly；It is rotten The additional amount for growing acid sodium solution is 25% of dry powder weight after mixing；
3) mechanical balling-up and drying and shaping: by the material for being sufficiently mixed wetting with pelletizer pelletizing, sample is after mixing Using rotating cylinder, moist powder raw material is developed by particle by the effect of waving and iron wire sieve, grain diameter in 8mm, And be formed by freeze-day with constant temperature, drying temperature is no more than 90 DEG C, and the oxygen release agent after sizing is that this technique prepares resulting finished product, Product cut size is 5mm-8mm.
Effete test embodiment 2
Experimental design organic glass flat flow reactive tank, reactive tank dischargeable capacity are 8L, sectional area 200cm2, trough inner water Flow velocity degree is designed as 1m/s, with pump water inlet of wriggling, inflow 20L/h.Groove body bottom is creek bed mud, and thickness about 1cm (accounts for slot Body height 10%), the high 10cm of overlying water, overlying water and bed mud analysis of physical and chemical property are shown in Table 1 and table 2.Self-control oxidant is added 560g/m2When, it tests overlying water DO content and ORP is respectively maintained at the aerobic state of 1.32mg/L and 42mV after 5d, on The removal rate for covering TP and COD in water reaches 90.11% and 63%, and sediments are canescence by black transitions.
1 overlying water physicochemical property of table
Overlying water
pH ORPmV TOC(mg/L) TP(mg/L) NH4 +-N(mg/L)
6.57 -138 20.46 1.69 7.46
2 Sediments physicochemical property of table
Illustrated by example, carrying out oxygenation to water body using new and effective compound oxygen release agent of the invention can effectively improve water Matter quality and inhibition sedimentary phosphate release, promote the self-purification of water, and then control water eutrophication, and can pass through the relevant technologies Zeolite is recycled, production cost is reduced.
In conclusion not generated in the preparation process of the compound oxygen release agent of high-efficiency environment friendly of the invention any harmful solid Body, liquid and gas are a kind of clean production processes, avoid and introduce other harmfuls to water body in use The secondary environmental pollutions such as object are closed, there is oxygen release source utilization efficiency height, oxygen release effect height, no pollution, invest that amount is low, production scale The advantages that changeable and easy formation industrialization.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore Without departing from the technical solutions of the present invention, to the above embodiments according to the technical essence of the invention any simply to repair Change, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.

Claims (8)

1. a kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization, which is characterized in that including place below Manage method and steps:
1) raw material is than choosing: using zeolite, bentonite for main packing material, sodium humate (Na-A) solution is embedding medium, powdery CaO2For oxygen release source；
2) raw material mixes: selecting zeolite and bentonite, powdery CaO of the particle size range for 0.5mm-1mm2, mechanical stirring is uniform, and Mass fraction is added into the material after mixing and is 5% sodium humate solution, and is stirred evenly；
3) mechanical balling-up and drying and shaping: by the material for being sufficiently mixed wetting with pelletizer pelletizing, and being formed by freeze-day with constant temperature, It is that this technique prepares resulting oxygen release agent after sizing.
2. the preparation process of the high-efficiency environment friendly oxygen release agent according to claim 1 for creek in-situ immobilization, feature exist In: in step 1), powdery CaO2, zeolite, bentonitic mass ratio be respectively (5.5-8): (2-3): (1-1.5).
3. the preparation process of the high-efficiency environment friendly oxygen release agent according to claim 1 for creek in-situ immobilization, feature exist In:
In step 1), the purifying process of sodium humate solution are as follows: sodium humate is by low-grade coal (it is required that its content of humic acid is greater than 50%) it is raw material, caustic soda, water (pH value reaches 9 to 11) is added, heating extracting is centrifuged removing slag, solution is done It is dry.
4. the preparation process of the high-efficiency environment friendly oxygen release agent according to claim 1 for creek in-situ immobilization, feature exist In:
In step 1), used CaO2Purity is greater than 50%, and sodium humate need to purify to purity greater than 35%, and sodium humate needs It washs to neutrality.
5. the preparation process of the high-efficiency environment friendly oxygen release agent according to claim 1 for creek in-situ immobilization, feature exist In:
In step 2), used CaO2Purity is greater than 50%, and sodium humate need to purify to purity greater than 35%, and sodium humate needs It washs to neutrality.
6. the preparation process of the high-efficiency environment friendly oxygen release agent according to claim 1 for creek in-situ immobilization, feature exist In:
In step 2), the additional amount of the sodium humate solution of mass fraction 5% is the 20%-25% of dry powder weight after mixing.
7. the preparation process of the high-efficiency environment friendly oxygen release agent according to claim 1 for creek in-situ immobilization, feature exist In:
In step 3), sample uses rotating cylinder after mixing, by the effect of waving and iron wire sieve that moist powder is former Material is developed into particle, and grain diameter is in 5mm-10mm, and spherical particles object is moved into rapidly drying constant weight after being prepared into, and drying temperature is not More than 90 DEG C.
8. the preparation process of the high-efficiency environment friendly oxygen release agent of any of claims 1-7 for creek in-situ immobilization is made The compound oxygen release agent obtained.
CN201811473114.2A 2018-12-04 2018-12-04 A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization Pending CN109264852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811473114.2A CN109264852A (en) 2018-12-04 2018-12-04 A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811473114.2A CN109264852A (en) 2018-12-04 2018-12-04 A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization

Publications (1)

Publication Number Publication Date
CN109264852A true CN109264852A (en) 2019-01-25

Family

ID=65186789

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811473114.2A Pending CN109264852A (en) 2018-12-04 2018-12-04 A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization

Country Status (1)

Country Link
CN (1) CN109264852A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114158506A (en) * 2021-11-26 2022-03-11 舒城县汇德水产科技有限公司 Artificial breeding method for pond greenhouse crayfishes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114158506A (en) * 2021-11-26 2022-03-11 舒城县汇德水产科技有限公司 Artificial breeding method for pond greenhouse crayfishes

Similar Documents

Publication Publication Date Title
CN104971699B (en) A kind of modified zeolite organic matter complexing agent of sewage synchronous denitrification dephosphorizing and preparation method thereof, using and methods for using them
CN102351306B (en) Mangneto modified ceramsite filler, preparation method thereof and application of modified filler in wastewater processing
CN101475362B (en) Biochemical ceramic as well as preparation method and application thereof
CN102658097B (en) Preparation method of efficient dephosphorizing porous particle adsorbent
CN108178246A (en) A kind of environment-friendly type light electrolysis haydite and preparation method thereof
CN103951463A (en) In-situ control coverage material for bottom mud of eutrophication-polluted lake, as well as preparation method thereof
CN106064962A (en) Utilize mud and coal ash for manufacturing for the method for catalyst particle electrode and application
CN102633421B (en) Sludge drying method
CN107555741B (en) Sludge micropore ecological solidification method
CN105734042A (en) Method for preparing photocatalysis type immobilized nitrogen and phosphorus removal granules
CN114291900A (en) Sulfur autotrophic denitrification particle and preparation method and application thereof
CN106540491A (en) A kind of sewage filter net for adsorbing gas soluble in water
CN109264852A (en) A kind of preparation process of the high-efficiency environment friendly oxygen release agent for creek in-situ immobilization
CN105523641B (en) The preparation method of microorganism compatibility water process light carrier
CN111848210A (en) Novel sponge water storage argil and preparation method thereof
CN106747641B (en) Method for preparing foam liquid and porous ceramic for foam concrete by using cow dung
CN101423306A (en) Treatment method and equipment for high phosphorus haematite mineral processing acid wastewater
CN110314638A (en) It is a kind of for removing the slag Nanoscale Iron support materials of phosphorus element in environment
CN102503061B (en) Inorganic-organic composite conditioner for sludge composting
CN111888913B (en) Granular biological filter material for biological deodorization of waste gas based on dewatered sludge of municipal sewage plant, preparation method and application
CN101767980A (en) Process for preparing bio-ceramsite with fly ashes
CN113083247A (en) Fe/silicate modified porous carbon and application thereof in adsorption of wastewater pollutants
CN106966756A (en) The method that a kind of utilization feces of livestock and poultry and sludge prepare water quality purification function eco-concrete
CN112830541A (en) Method for continuously removing phosphorus for long time by using multifunctional long-acting composite filler
CN107010806A (en) A kind of method that hydrothermal carbonization handles sludge

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190125

RJ01 Rejection of invention patent application after publication