CN102351343A - Method for effectively removing residual aluminum in water by adopting flocculation process - Google Patents

Method for effectively removing residual aluminum in water by adopting flocculation process Download PDF

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Publication number
CN102351343A
CN102351343A CN2011101901730A CN201110190173A CN102351343A CN 102351343 A CN102351343 A CN 102351343A CN 2011101901730 A CN2011101901730 A CN 2011101901730A CN 201110190173 A CN201110190173 A CN 201110190173A CN 102351343 A CN102351343 A CN 102351343A
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China
Prior art keywords
water
flocculation
microbial flocculant
flocculating
pac
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CN2011101901730A
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Chinese (zh)
Inventor
王兰
唐静
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南开大学
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Priority to CN2011101901730A priority Critical patent/CN102351343A/en
Publication of CN102351343A publication Critical patent/CN102351343A/en

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Abstract

The invention relates to a method for effectively removing residual aluminum in water by adopting a flocculation process, which adopts the flocculation process by using aluminum series flocculating agents as main flocculating agents and microorganism flocculating agents as auxiliary agents and comprises the following steps of: 1) selecting aluminum series flocculating agent polyaluminium chloride (PAC) as the main flocculating agents; 2) selecting microorganism flocculating agent soy aspergillus sojae strains as the auxiliary agents; and 3) adding the PAC and the microorganism flocculating agents into water to be treated, respectively carrying out fast stirring and slow stirring, and discharging supernatant fluid after stillness. The method has the advantages that the chemical flocculating agent and microorganism flocculating agent compounding treatment method is adopted, the problem of secondary pollution caused by the application of the PAC in the prior art is solved, the consumption of the PAC is reduced, the flocculation efficiency is improved, the effect of effectively removing the residual aluminum is reached through the bonding of the microorganism flocculating agents and the PAC and the immeshing effect of the microorganism flocculating agents, and the method belongs to an economic and efficient flocculation method of removing the residual aluminum in the water.

Description

A kind of method that adopts flocculation process effectively to remove residual aluminum in the water

Technical field

The invention belongs to water-treatment technology field, be specifically related to a kind of method that adopts flocculation process effectively to remove residual aluminum in the water.

Background technology

Water is origin of life, is human and the biology indispensable material of depending on for existence, also is the essential condition of industrial development.Along with rapid development of economy and Increase of population, water consumption that China is annual and quantity of wastewater effluent are also increasing, and feedwater and sewage handling problem are increasingly serious.The development of water technology and practical applications have become the necessary component of maintaining social economy's Sustainable development.

Flocculation technique is the main method that feedwater at present and wastewater treatment are adopted.On the flocculation technique development history, chemical floc is the most frequently used flocculation agent, but because chemical floc to the health of human body and the influence of environment, makes its safety in utilization receive much concern.The polymeric aluminum based flocculating agent is widely used in the middle of the water treatment owing to its good flocculating property and cheap.And along with the improving constantly of scientific and technological level, and to the deepening continuously of aluminium applied research, find aluminium get into human body after major part can accumulate in vivo, combine with the important composition composition of human body such as multiple proteins and enzyme, influence multiple metabolic reaction in the human body.And its accumulation meeting in human body cerebral tissue and neuronal cell causes damage to the memory of human body, and makes people's bradyphrenia, the judgement decline, even cause neural paralysis, there are some researches show that aluminium is one of the inducement of " senile dementia ".Given this plant situation, the use of aluminium based flocculating agent has obtained strict control, and the World Health Organization is restricted to 0.2mg/L to aluminium content requirement maximum permissible concentration in the tap water.Therefore, select the optimization of selection, dosage and the corresponding flocculating conditions of flocculation agent in the suitable operational condition, particularly flocculation process link in the water treatment procedure, significant for guaranteeing effluent quality and reducing residual aluminum content simultaneously.

For seeking safe flocculation agent; The more still application of microbial flocculant in water treatment of research both at home and abroad at present; That though microbial flocculant has is applied widely, readily biodegradable, to the advantage of environment non-secondary pollution, issues limit such as its addition is big, cost height its use widely.Therefore; The invention provides and a kind ofly utilize the aluminium based flocculating agent that flocculating effect is good, price is low to be the master; Cooperating safety, biodegradable microbial flocculant is the flucculation process of auxiliary agent; Not only can improve flocculating effect; Reduce cost; And can effectively remove the residual aluminum in the water, be a kind of economy, safety, water treatment method efficiently.

Summary of the invention

The objective of the invention is provides a kind of method that adopts flocculation process effectively to remove residual aluminum in the water to above-mentioned existing problems, and this method technology is simple, easy to implement, and flocculating effect is high, low, the non-secondary pollution of processing cost, and is safe and reliable.

Technical scheme of the present invention:

A kind of method that adopts flocculation process effectively to remove residual aluminum in the water, adopting with the aluminium based flocculating agent is that main flocculation agent, microbial flocculant are the flocculation process of auxiliary agent, comprises the steps:

1) aluminium based flocculating agent polymerize aluminum chloride (PAC) is main flocculation agent, in institute's treating water, adds polymerize aluminum chloride, and add-on is 50-150mg/L;

2) selecting microbial flocculant for use is auxiliary agent, in above-mentioned institute treating water, adds microbial flocculant, and add-on is 5-25mg/L;

3) will add institute's treating water behind polymerize aluminum chloride and the microbial flocculant; Under the stirring velocity of 300-500rpm, stir 1-5min fast, reduce stir speed (S.S.) then, stir 5-30min more at a slow speed to 30-100rpm; Behind the static 10-30min, discharge supernatant liquor and get final product.

Said microbial flocculant be by the Aspergillus sojae bacterial classification ( Aspergillus souae,DSMZ of Shanghai Institute of Pharmaceutical Industry buys) make through culture isolation and purification, step is following:

1) preparation substratum, the component of substratum and mass percent are: NaNO 30.3 ~ 0.5%, KCl 0.05 ~ 0.1%, K 2HPO 40.1 FeSO ~ 0.5%, 40.001 MgSO ~ 0.005%, 47H 2O 0.05 ~ 0.1%, sucrose 1 ~ 6%, surplus are distilled water, and each component is dissolved in the distilled water, and 121 ℃ of sterilizations are subsequent use after 20 minutes;

2) with the Aspergillus sojae bacterial classification ( Aspergillus souae) be inoculated in the above-mentioned substratum, medium pH 5.5 ~ 6.5, culture temperature is 20 ~ 30 ℃, shaking culture 40 ~ 60h under 100 ~ 200r/min revolution promptly gets nutrient solution;

3) above-mentioned nutrient solution is filtered remove thalline after, in liquid, add volume for its 3 ~ 10 times, temperature are that 4 ℃ dehydrated alcohol precipitates, be to leave standstill 10-12 hour under 4 ℃ of conditions in temperature, centrifugation under 2000 ~ 5000rpm then obtains throw out;

4) above-mentioned throw out is added distilled water and dissolve fully to it, gained solution is by identical condition repeating step 3) in deposition, leave standstill and lock out operation, obtain secondary precipitate;

5) again with secondary precipitate by identical condition repeating step 4) in dissolving, precipitate, leave standstill and lock out operation 2 ~ 3 times, can make the microbial flocculant of purifying.

Advantage of the present invention and positively effect: the present invention has adopted chemical floc (PAC) and the composite method of microbial flocculant; Select suitable compounded formula and treatment process for use; The use that has solved present PAC can form the shortcoming of secondary pollution; Both reduced the usage quantity of PAC; Improved flocculation efficiency; Act on the effect that has reached efficient removal residual aluminum because the net of the bonding of microbial flocculant and PAC and microbial flocculant is caught again, be a kind of economy, remove the flucculation process of residual aluminum in the water efficiently.

Description of drawings

Fig. 1 is the microbial flocculant appearance aspect graph of preparation.

Embodiment

At first prepare microbial flocculant, promptly by the Aspergillus sojae bacterial classification ( Aspergillus souae,DSMZ of Shanghai Institute of Pharmaceutical Industry buys) make through culture isolation and purification, step is following:

1) preparation substratum, the component of substratum and mass percent are: NaNO 30.3%, KCl 0.05%, K 2HPO 40.1%, FeSO 40.001%, MgSO 47H 2O 0.05%, sucrose 3%, surplus are distilled water, and each component is dissolved in the distilled water, and 121 ℃ of sterilizations are subsequent use after 20 minutes;

2) with the Aspergillus sojae bacterial classification ( Aspergillus souae) be inoculated in the above-mentioned substratum, medium pH 6.5, culture temperature is 28 ℃, shaking culture 60h under the 150r/min revolution promptly gets nutrient solution;

3) above-mentioned nutrient solution is filtered remove thalline after, in liquid, add volume for its 5 times, temperature are that 4 ℃ dehydrated alcohol precipitates, be to leave standstill 12 hours under 4 ℃ of conditions in temperature, centrifugation under 5000rpm then obtains throw out;

4) above-mentioned throw out is added distilled water and dissolve fully to it, gained solution is by identical condition repeating step 3) in deposition, leave standstill and separate, obtain secondary precipitate;

5) again with secondary precipitate by identical condition repeating step 4) in dissolving, precipitate, leave standstill and lock out operation 2 times, can make the microbial flocculant of purifying.

Accompanying drawing is the microbial flocculant appearance aspect graph of preparation.

Embodiment 1:

A kind of method that adopts flocculation process effectively to remove residual aluminum in the water, adopting with the aluminium based flocculating agent is that main flocculation agent, microbial flocculant are the flocculation process of auxiliary agent, comprises the steps:

1) aluminium based flocculating agent polymerize aluminum chloride (PAC) is main flocculation agent, in institute's treating water, adds polymerize aluminum chloride, and add-on is 50mg/L;

2) in above-mentioned institute treating water, add the microbial flocculant for preparing, add-on is 15mg/L;

3) will add institute's treating water behind polymerize aluminum chloride and the microbial flocculant, under the stirring velocity of 300rpm, stir 2min fast, reduce stir speed (S.S.) then, stir 20min more at a slow speed, and behind the static 20min, discharge supernatant liquor and get final product to 50rpm.

Detected result shows: the clarity in the supernatant liquor is good, and residual aluminum can be low to moderate 0.0085mg/L, and does not adopt this method to use the treating water residual aluminum of PAC can reach 0.2893mg/L separately, has exceeded limit standard, and residual aluminum content minimizing amplitude reaches 97.1%.

Embodiment 2:

A kind of method that adopts flocculation process effectively to remove residual aluminum in the water, adopting with the aluminium based flocculating agent is that main flocculation agent, microbial flocculant are the flocculation process of auxiliary agent, comprises the steps:

1) aluminium based flocculating agent polymerize aluminum chloride (PAC) is main flocculation agent, in institute's treating water, adds polymerize aluminum chloride, and add-on is 80mg/L;

2) in above-mentioned institute treating water, add the microbial flocculant for preparing, add-on is 6mg/L;

3) will add institute's treating water behind polymerize aluminum chloride and the microbial flocculant, under the stirring velocity of 400rpm, stir 1min fast, reduce stir speed (S.S.) then, stir 10min more at a slow speed, and behind the static 30min, discharge supernatant liquor and get final product to 60rpm.

Detected result shows: the clarity in the supernatant liquor is good, and residual aluminum can be low to moderate 0.0035mg/L, and does not adopt this method to use the treating water residual aluminum of PAC can reach 0.2275mg/L separately, has exceeded limit standard, and residual aluminum content minimizing amplitude reaches 98.5%.

Claims (2)

1. method that adopts flocculation process effectively to remove residual aluminum in the water is characterized in that: adopting with the aluminium based flocculating agent is that main flocculation agent, microbial flocculant are the flocculation process of auxiliary agent, comprises the steps:
1) aluminium based flocculating agent polymerize aluminum chloride (PAC) is main flocculation agent, in institute's treating water, adds polymerize aluminum chloride, and add-on is 50-150mg/L;
2) selecting microbial flocculant for use is auxiliary agent, in above-mentioned institute treating water, adds microbial flocculant, and add-on is 5-25mg/L;
3) will add institute's treating water behind polymerize aluminum chloride and the microbial flocculant; Under the stirring velocity of 300-500rpm, stir 1-5min fast, reduce stir speed (S.S.) then, stir 5-30min more at a slow speed to 30-100rpm; Behind the static 10-30min, discharge supernatant liquor and get final product.
2. effectively remove the method for residual aluminum in the water according to the said employing flocculation process of claim 1, it is characterized in that: said microbial flocculant be by the Aspergillus sojae bacterial classification ( Aspergillus souae,DSMZ of Shanghai Institute of Pharmaceutical Industry buys) make through culture isolation and purification, step is following:
1) preparation substratum, the component of substratum and mass percent are: NaNO 30.3 ~ 0.5%, KCl 0.05 ~ 0.1%, K 2HPO 40.1 FeSO ~ 0.5%, 40.001 MgSO ~ 0.005%, 47H 2O 0.05 ~ 0.1%, sucrose 1 ~ 6%, surplus are distilled water, and each component is dissolved in the distilled water, and 121 ℃ of sterilizations are subsequent use after 20 minutes;
2) with the Aspergillus sojae bacterial classification ( Aspergillus souae) be inoculated in the above-mentioned substratum, medium pH 5.5 ~ 6.5, culture temperature is 20 ~ 30 ℃, shaking culture 40 ~ 60h under 100 ~ 200r/min revolution promptly gets nutrient solution;
3) above-mentioned nutrient solution is filtered remove thalline after, in liquid, add volume for its 3 ~ 10 times, temperature are that 4 ℃ dehydrated alcohol precipitates, be to leave standstill 10-12 hour under 4 ℃ of conditions in temperature, centrifugation under 2000 ~ 5000rpm then obtains throw out;
4) above-mentioned throw out is added distilled water and dissolve fully to it, gained solution is by identical condition repeating step 3) in deposition, leave standstill and lock out operation, obtain secondary precipitate;
5) again with secondary precipitate by identical condition repeating step 4) in dissolving, precipitate, leave standstill and lock out operation 2 ~ 3 times, can make the microbial flocculant of purifying.
CN2011101901730A 2011-07-08 2011-07-08 Method for effectively removing residual aluminum in water by adopting flocculation process CN102351343A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102628065A (en) * 2012-04-17 2012-08-08 山西大学 Production method of microbial flocculant and application thereof
CN102628066A (en) * 2012-04-17 2012-08-08 山西大学 Preparation method and application of microbial flocculant
CN104276689A (en) * 2014-09-11 2015-01-14 哈尔滨工业大学宜兴环保研究院 Method for removing low-concentration cadmium ions in water by using complex flocculant
CN104475039A (en) * 2014-12-10 2015-04-01 中南大学 Biological adsorbent capable of removing fluorine and heavy metals in wastewater, preparation method and application method thereof
CN104525144A (en) * 2014-12-30 2015-04-22 中南大学 Aluminum sulfate modified iron-based biological material for heavy metal adsorption and preparing and application method thereof
CN106145296A (en) * 2016-08-31 2016-11-23 中国石油集团川庆钻探工程有限公司 A kind of composite flocculation agent preparation method for fracturing outlet liquid reuse pre-treatment
CN106495304A (en) * 2016-11-08 2017-03-15 嘉善弘欣化工厂(普通合伙) A kind of flocculant formula and its preparation technology for aquaculture sewage disposal
CN106630063A (en) * 2016-12-20 2017-05-10 南京理工大学 Microbial flocculating agent generated by paenibacillus and applications thereof

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102628065A (en) * 2012-04-17 2012-08-08 山西大学 Production method of microbial flocculant and application thereof
CN102628066A (en) * 2012-04-17 2012-08-08 山西大学 Preparation method and application of microbial flocculant
CN102628066B (en) * 2012-04-17 2013-11-20 山西大学 Preparation method and application of microbial flocculant
CN102628065B (en) * 2012-04-17 2013-11-20 山西大学 Production method of microbial flocculant and application thereof
CN104276689A (en) * 2014-09-11 2015-01-14 哈尔滨工业大学宜兴环保研究院 Method for removing low-concentration cadmium ions in water by using complex flocculant
CN104276689B (en) * 2014-09-11 2016-08-31 哈尔滨工业大学宜兴环保研究院 A kind of Compositional type flocculant is utilized to remove the method for low concentration cadmium ion in water
CN104475039A (en) * 2014-12-10 2015-04-01 中南大学 Biological adsorbent capable of removing fluorine and heavy metals in wastewater, preparation method and application method thereof
CN104525144A (en) * 2014-12-30 2015-04-22 中南大学 Aluminum sulfate modified iron-based biological material for heavy metal adsorption and preparing and application method thereof
CN106145296A (en) * 2016-08-31 2016-11-23 中国石油集团川庆钻探工程有限公司 A kind of composite flocculation agent preparation method for fracturing outlet liquid reuse pre-treatment
CN106495304A (en) * 2016-11-08 2017-03-15 嘉善弘欣化工厂(普通合伙) A kind of flocculant formula and its preparation technology for aquaculture sewage disposal
CN106495304B (en) * 2016-11-08 2019-07-23 捷艾悉环保科技(上海)有限公司 A kind of flocculant formula and its preparation process for aquaculture sewage treatment
CN106630063A (en) * 2016-12-20 2017-05-10 南京理工大学 Microbial flocculating agent generated by paenibacillus and applications thereof

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Application publication date: 20120215