CN100427595C - Biology diatom water treatment agent and method of producing the same - Google Patents
Biology diatom water treatment agent and method of producing the same Download PDFInfo
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- CN100427595C CN100427595C CNB2007101967271A CN200710196727A CN100427595C CN 100427595 C CN100427595 C CN 100427595C CN B2007101967271 A CNB2007101967271 A CN B2007101967271A CN 200710196727 A CN200710196727 A CN 200710196727A CN 100427595 C CN100427595 C CN 100427595C
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Abstract
The invention discloses a biological diatom water treatment agent, which comprises diatomite, flocculant, activated carbon and water treatment engineering bacteria. The content of flocculant is 20 percent to 50 percent of the mass of diatomite; the content of activated carbon is 1 percent to 5 percent of the mass of diatomite; the content of water treatment engineering bacteria is 0.1 percent to 1 percent of the mass of diatomite. On one hand, the biological diatom water treatment agent of the invention has good absorption ability for the pollutant in the water; on the other hand, the denitrification capability of the immobilized microorganism improves the deficiency of denitrification capability of the diatomite. The invention can also increase the water treatment efficiency; the invention has a compact equipment structure, easy operation and high and stable water quality.
Description
Technical field
The invention belongs to water treatment field, be specifically related to a kind of diatom (silicon shell) water conditioner that contains microorganism.
Background technology
At present, it is more to be used for microbial immobilized method kind, comprises crosslinking, absorption method, covalent bonds method, entrapping method etc., and its relative merits are as shown in the table.
By more as can be known, the toxicity pair cell of chemical reagent has infringement in the chemical fixation method, therefore is not suitable for the preparation immobilized growing cell.The mechanical property of physical crosslinking method is relatively poor.Semi-transparent embrane method collection reacts and is located away from one, and the film surface is bigger, has selectivity again, thereby has very big potentiality, but also there are many problems in the design of the character of film, membrane reactor with operation operation aspect.And absorption method is owing to its lower cost and the easy extensive concern that is subjected to of preparation.
The absorption method immobilization carrier is divided into inorganic absorption method immobilization carrier and organic absorption immobilization carrier again.Inorganic absorption method immobilization carrier commonly used comprises silica gel, gac, natural zeolite, haydite etc.As microbial immobilized inorganic carrier, there are defectives such as bonding force is less in it; And, then have defectives such as poor selectivity, adsorptive power are not strong, absorption property can't be adjusted as inorganic adsorbent.Organic method absorption immobilization carrier one big defective commonly used is that regeneration is difficult, and in addition, its cost is higher, easily aging.
With regard to water technology, China's municipal effluent second-stage treatment technology commonly used at present is sewage → grid → settling pit → preliminary sedimentation tank → biological treatment tank → second pond → water outlet.This Technology maturation, managerial experience are enriched.But this technology is general and very difficult to sewage treatment effect ammonia nitrogen concentration in the water outlet is handled in the emission standard.
Summary of the invention
The objective of the invention is to handle problems such as degree of depth deficiency, middle water reuse difficulty, provide a kind of and can make processing efficiency height, compact equipment, easy to operate, sewage-treating agent that effluent quality is high and stable in order to overcome existing sewage disposal technology.
Another object of the present invention provides a kind of preparation method of above-mentioned water conditioner.
Purpose of the present invention can reach by following measure:
A kind of biological diatom (silicon shell) water conditioner, form by diatomite, flocculation agent, activated carbon and engineering of water treatment bacterium, wherein the content of flocculation agent is 20～50% of diatomite quality, the content of activated carbon is 1～5% of diatomite quality, and the content of engineering of water treatment bacterium is 1 of diatomite quality～10 ‰.
The preparation method of a kind of biological diatom (silicon shell) water conditioner adds the flocculation agent of its quality 20～50% and the activated carbon of its quality 1～5% in diatomite, be mixed with the sewage-treating agent first product after mixing; In first product, add the engineering of water treatment bacterium of diatomite quality 1～10 ‰, after evenly stirring is fixed, make biology diatom water treatment agent.
Wherein in the diatomite content of diatom shell preferably more than 70%.Flocculation agent can be selected inorganic flocculating agent or organic floculant for use.
Organic floculant can be selected non-ionic type organic polymer coargulators such as polyacrylamide for use, perhaps anionic organic polymer coargulators such as polyacrylic acid, sodium polyacrylate, calcium polyacrylate (CPA).Inorganic flocculating agent can aluminium salt or molysite class inorganic flocculating agent, as aluminium chlorohydroxide, Tai-Ace S 150, ferric sulfate, iron trichloride, alum, aluminum hydroxide gel, polyaluminium sulfate or bodied ferric sulfate etc.
The particle diameter of activated carbon is 50～500 orders, is good with 100～400 orders, wherein preferably uses cocos active carbon.
Biological bacteria of the present invention can adopt conventional engineering of water treatment bacterium, as the brave new environmental protection Science and Technology Co., Ltd. of the U.S. (Advanced Concept Thermal System, Verbatim bacterium Inc.) and super-CM biological bacteria (U.S. Patent number: US005578486A) or the like.The former possesses following characteristics: 1. and organism in the water of decomposition, reduce the pond bottom sediment; 2. help the removal of phosphor in sewage; 3. use-pattern is easy and economic benefit is high.And the latter's high efficiency can reduce construction investment and working cost, raising treatment effect.After these engineering bacterias were fixed on diatom (silicon shell) water conditioner, loss that can the prevention and cure project bacterium ensured the superiority of engineering bacteria, also can improve the performance of engineering bacteria on the other hand, ensures the treatment effect of water outlet.Simultaneously, this also can tame it at former water condition before using.
Biological diatom of the present invention (silicon shell) water conditioner specifically can prepare by the following method:
The first step: the enrichment of diatom (silicon shell)
By existing beneficiation method (pickling, calcining or physical concentration etc.) diatom original soil is selected and to wash, form diatom (silicon shell) content and reach pure soil more than 70%.
Second step: the preparation method of diatom (silicon shell) water conditioner
After in diatom (silicon shell) content is diatomite more than 70%, adding flocculation agents such as 20%～50% aluminium chlorohydroxide, iron trichloride, adding 1%～5% particle diameter again (its objective is and play bridging action at 100～500 purpose activated carbon, improve, improve diatom (silicon shell) water conditioner performance), after evenly stirring, be mixed with the sewage-treating agent first product;
The 3rd step: fixed biologically bacterium
Because microbial bacteria contains natural radioactivity ferment (enzyme), microorganism plays rapid degradation of contaminant and improves biochemical effect in water treatment applications effect.Therefore, microbial bacteria is fixed in after diatom (silicon shell) goes up, will improves treatment effect and effluent quality greatly.
In second diatom (silicon shell) the water conditioner first product that be prepared into of step, add weight ratio and be 1 ‰～10 ‰ the purebred engineering of water treatment bacterium of liquid or solid that in engineering of water treatment, has excellent results or have certain special processing function, after it is evenly stirred, be mixed with the required biological diatom of sewage disposal (silicon shell) water conditioner.
This reagent requirement is prepared in the week before use according to different quality.Wherein, biological diatom (silicon shell) water conditioner X-ray thoroughly when preserving prevents that simultaneously it from shining for a long time in the sun.
The biological diatom for preparing (silicon shell) water conditioner is put in the sewage by the dosage of 10～100ppm and is handled.
The utilization of biology diatom water treatment agent of the present invention in water treatment:
1. apply in the city domestic sewage processing:
With traditional biochemical process (as A/O, A
2/ O, SBR, CASS etc.) combine, can play the effect of shortening the residence time, improving biochemical effect, satisfy in the water inlet condition under the prerequisite of traditional biochemical process tolerance range, final treat effluent can reach: COD≤20mg/L, ammonia nitrogen≤1mg/L, T-P≤0.5mg/L.Fig. 2 is the synoptic diagram that uses biological diatom (silicon shell) water conditioner in A/O technology.
2. apply in the Industrial Wastewater Treatment:
Can be used as the advanced treatment unit operating procedure, former effluent quality is further improved, water reuse requirement in reaching.
3. diatom processing unit:
In biochemistry pool, by adding biological diatom (silicon shell) water conditioner, and it is risen to the active sludge thorough mixing, after fixing in circulatior clarifier or mechanical accelerating purifying pool or the special-purpose water treating equipment adsorb, flocculation, filteration, again part diatom (silicon shell) is back in the biochemistry pool simultaneously, plays the purpose that increases microorganism and carrier duration of contact.
4. in existing sewage disposal, on any technology, increase by a cover diatom processing unit, can make treat effluent effectively improve clearance, play a role in energy conservation.
Biological diatom of the present invention (silicon shell) water conditioner, utilize on the one hand in the uneven electrical potential energy on diatom surface and the electric charge of suspended particles, its current potential that repels each other is damaged and forms the wine with dregs plumage with diatom, aggegation becomes bigger wadding flower, add specific surface area and surface adsorption that it is huge, take off steady colloid and very easily be adsorbed on the diatomite, therefore, this water conditioner has the good adsorption effect to water pollutant; On the other hand, the good pore structure in diatomite surface also fixedly provides good condition for microorganism.This technology is on the basis of the powerful pollutent adsorptive power of diatomite, utilize the denitrogenation ability of immobilized microorganism to improve the situation of diatomite denitrogenation scarce capacity, and finally reach the purpose of other effluent quality indexs of further raising by this two aspects effect.Water conditioner of the present invention can improve processing efficiency again simultaneously, makes compact equipment, easy to operate, make effluent quality high and stable.
Description of drawings
Fig. 1 is a kind of preparation method's synoptic diagram of biological diatom (silicon shell) water conditioner of the present invention.
Fig. 2 is the utilization synoptic diagram of biological diatom (silicon shell) water conditioner of the present invention in existing technology.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment 1
After diatom shell content is to add 40% flocculation agent aluminium chlorohydroxide in the diatomite more than 70%, add 3% particle diameter again at 200～400 purpose cocos active carbons, after evenly stirring, be mixed with the sewage-treating agent first product;
The interpolation weight ratio is 5 ‰ engineering of water treatment bacterium Verbatim bacterium in first product, after it is evenly stirred, is mixed with the required biological diatom of sewage disposal (silicon shell) water conditioner.
Embodiment 2
After diatom content is to add 25% flocculation agent iron trichloride in the diatomite more than 70%, add 2% particle diameter again at 200～400 purpose activated carbon, after evenly stirring, be mixed with the sewage-treating agent first product;
The interpolation weight ratio is 2 ‰ engineering of water treatment bacterium Verbatim bacterium in first product, after it is evenly stirred, is mixed with the required biological diatom of sewage disposal (silicon shell) water conditioner.
Embodiment 3
After diatom content is to add 50% flocculation agent aluminium chlorohydroxide in the diatomite more than 70%, add 5% particle diameter again at 200～400 purpose activated carbon, after evenly stirring, be mixed with the sewage-treating agent first product;
The interpolation weight ratio is 9 ‰ engineering of water treatment bacterium super-CM biological bacteria in first product, after it is evenly stirred, is mixed with the required biological diatom of sewage disposal (silicon shell) water conditioner.
Comparative Examples
After diatom content is to add 40% flocculation agent aluminium chlorohydroxide in the diatomite more than 70%, add 3% particle diameter again at 200～400 purpose cocos active carbons, after evenly stirring, be mixed with the sewage-treating agent first product.
As shown in Figure 2, utilize a biological diatom treatment system to replace original second pond unit in traditional A/O technology back, on the one hand by in biological diatom integrated reactor, constantly adding biological diatom (silicon shell) water conditioner, to pollutent in the sewage adsorb, flocculation, filteration and microorganism be to the Degradation of pollutent; On the other hand, backflow by mud, reflux ratio according to 10%～200% is back to biochemical system with part biological diatom (silicon shell), increased the duration of contact of microbial bacteria and diatom (silicon shell), strengthened the microbial immobilization effect and, strengthened the performance of biological diatom (silicon shell) water conditioner the Degradation of pollutent.
The biology diatom water treatment agent that embodiment 1 is obtained adds the city domestic sewage of handling identical water quality in the above-mentioned technology respectively with Comparative Examples, shown in concrete outcome sees the following form:
As can be seen from the above table: ammonia nitrogen removal frank is very low and water outlet COD is higher in the water outlet after handling by Comparative Examples, even link with biochemical technology, ammonia nitrogen concentration is still higher in the water outlet, water reuse standard in being difficult to reach; Compare, this prescription can be preferably removes the ammonia nitrogen in anhydrating, and its excess-three item index all has higher removal, and when it combined with biochemical technology, final outflow water reached middle water reuse standard.
Claims (6)
1, a kind of biology diatom water treatment agent, form by diatomite, flocculation agent, activated carbon and engineering of water treatment bacterium, wherein the content of flocculation agent is 20～50% of diatomite quality, the content of activated carbon is 1～5% of diatomite quality, and the content of engineering of water treatment bacterium is 1～10% of diatomite quality.
2, biology diatom water treatment agent according to claim 1, the content that it is characterized in that diatom shell in the described diatomite is more than 70%.
3, biology diatom water treatment agent according to claim 1 is characterized in that described flocculation agent is aluminium chlorohydroxide, Tai-Ace S 150, ferric sulfate, iron trichloride, polyaluminium sulfate or bodied ferric sulfate.
4, biology diatom water treatment agent according to claim 1, the particle diameter that it is characterized in that described activated carbon is 50～500 orders.
5, biology diatom water treatment agent according to claim 1 is characterized in that described engineering of water treatment bacterium is Verbatim bacterium or super-CM biological bacteria.
6, a kind of preparation method of biology diatom water treatment agent is characterized in that adding the flocculation agent of its quality 20～50% and the activated carbon of its quality 1～5% in diatomite, is mixed with the sewage-treating agent first product after mixing; In first product, add the engineering of water treatment bacterium of diatomite quality 1～10%, after evenly stirring is fixed, make biology diatom water treatment agent.
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Cited By (1)
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| CN101898821A (en) * | 2010-04-20 | 2010-12-01 | 南京农业大学 | Bio-diatomite composite flocculant |
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| CN103265150A (en) * | 2013-06-09 | 2013-08-28 | 西南科技大学 | Method for flocculation processing after adsorption of polluting positive ions by microorganisms |
| CN103831081B (en) * | 2014-02-28 | 2015-10-28 | 深圳市兆凯生物工程研发中心有限公司 | A kind of adsorbent for heavy metal containing wastewater treatment and process for treating heavy-metal waste water |
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Address after: 211102 floor 12, building a, cecep building, No. 2, qingshuiting West Road, moling street, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Huafang water (China) Co., Ltd Address before: 210002 A, block B, building 18, Sun Yue Building, No. 2 Taiping South Road, Jiangsu, Nanjing Patentee before: JIANGSU PROVINCE JIAQING WATER SERVICES Co.,Ltd. |