CN103232116B - Method for treating heavy-metal wastewater by using biological water purifying agent prepared from cyanobacteria bloom - Google Patents

Method for treating heavy-metal wastewater by using biological water purifying agent prepared from cyanobacteria bloom Download PDF

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Publication number
CN103232116B
CN103232116B CN201310120448.2A CN201310120448A CN103232116B CN 103232116 B CN103232116 B CN 103232116B CN 201310120448 A CN201310120448 A CN 201310120448A CN 103232116 B CN103232116 B CN 103232116B
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blue
heavy metal
bloom
water purifying
green alga
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CN201310120448.2A
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Chinese (zh)
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CN103232116A (en
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李建宏
吴文娟
梁霞
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南京师范大学
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Abstract

The invention relates to a method for treating heavy-metal-containing wastewater by using a biological water purifying agent prepared from cyanobacteria bloom. According to the invention, obtained cyanobacteria bloom is subjected to high-temperature sterilization treatment, and is inoculated by using bacillus cereus CGMCC1.0126; culturing is carried out for 3 days, such that the biological water purifying agent is prepared. When the biological water purifying agent is used for treating heavy-metal wastewater, the biological water purifying agent is added with a certain ratio according to heavy metal content, and a pH is regulated to 5-6; and absorption is carried out for 30min. With the method, a biological purification rate (amount of metal removed/initial amount of metal) is relatively high, and Cd, Ni, and Cu removal rates can respectively reach 90%, 80%, and 75%. According to the invention, a contaminated waste cyanobacteria bloom is adopted as the raw material, and the novel biological water purifying agent is prepared. The method has the characteristics of low cost, no secondary pollution, wide application range, and the like. With the method, pollution is eliminated, resource is saved, and purposes of treating pollution by using pollutant and of recycling waste are achieved.

Description

Prepare the method for biologic water cleaner processing heavy metal wastewater thereby with blue-green alga bloom

Technical field

The method that the present invention relates to process blue-green alga bloom as biologic water cleaner heavy metal-containing waste water, belongs to emerging biological wastewater treatment technology field.Comprise salvaging, processing, utilization and the microorganism culturing series technique of blue-green alga bloom, can utilize blue-green alga bloom to cultivate with this method has after the bacillus cereus of the special ability of purifying waste water, both collaborative heavy metal ion of removing in sewage, improve the right adsorption rate to heavy metal, eliminated the organic pollutant that blue-green algae cracking produces, becoming pollution waste is resource.

Background technology

Algal bloom brings huge loss and problem to China's water resources, expends every year huge energy and fund and carries out the Pollution abatement work in the great waters such as Taihu Lake, Dian Chi.The rancid not only polluted water that wawter bloom algae sends, and be also great destruction to environment, a large amount of algae salvages becomes waste.But the discovery of research in recent years, blue-green alga bloom has the incomparable advantage of other biological: it extensively exists, cheap and easy to get; Reaction conditions gentleness, has wide range of applications; Itself contain algae albumen, can be as cultivating some microorganisms; Selectivity is good, and adsorptive capacity is large, and adsorption efficiency is high, is applicable to the metal sewage of lower concentration; To the metal recoverable of absorption, can not produce secondary pollution, and can process the organic contamination in water body.Therefore after the blue-green alga bloom of salvaging can being processed, as biologic water cleaner.

In China's heavy metal wastewater thereby, be mainly to contain the heavy metal ion such as copper, nickel, chromium, zinc, these materials enter poisoning, the lethal and environmental pollution that can cause people and animals in water body.In recent years, country is to requiring to improve gradually containing heavy metal containing sewage level of clean production.

The object of this invention is to provide a kind of novel method of efficiently utilizing blue-green alga bloom.Pass through this method, first cultivate the bacillus cereus with Adsorption of Heavy Metals ability with blue-green alga bloom lysate, bacterium has utilized the organic nutrient substance of blue-green alga bloom, then can work in coordination with Adsorption of Heavy Metal Ions, has improved heavy metal adsorption rate and the utilization ratio of blue-green alga bloom.The method has scientific and reasonable, workable feature, and can reduce production costs, energy Rapid Popularization in this specialty, and the result of use of this inventive method on producing shows, reached desired novelty in patent, practicality and creationary requirement.

Summary of the invention

The present invention is directed to the problem that is converted into biologic water cleaner using blue-green alga bloom as a kind of waste resource, a kind of method of blue-green alga bloom organism Efficient Conversion, utilization is provided, using blue-green alga bloom as a kind of utilization of resources, for the development of China's new bio water purification agent provides technical support, increased a kind of comparatively economic wawter bloom improvement method simultaneously.

The invention discloses blue-green alga bloom in the application of preparing in biologic water cleaner processing heavy metal wastewater thereby.

Process the method in heavy metal wastewater thereby with blue-green alga bloom, comprise the following steps:

1) prepare biologic water cleaner: by the blue-green alga bloom algae mud high-temperature sterilization of salvaging, regulate pH to 8.0, under the condition of 120 ℃, make blue-green alga bloom lysate substratum; By being inoculated in this lysate after bacillus cereus Bacillus cereus CGMCC1.0126 enlarged culturing, in the shaking table of 35 ℃ or in fermentor tank, to cultivate 3 days, bacteria concentration is greater than 10 7cfu/ml, is prepared into suspension, is biologic water cleaner;

2) Adsorption of Heavy Metal Ions: by 1) in biologic water cleaner mix with the volume ratio of 1:3 with heavy metal wastewater thereby, regulate pH be 5~6, temperature is 25 ℃, absorption 30min;

3) post-processed: by mixture flocculation sediment, the filter dehydration of blue-green alga bloom, bacillus cereus and heavy metal wastewater thereby, the burning residual dregs obtaining reclaims heavy metal or further processes rear landfill.

Being prepared as follows of described blue-green alga bloom lysate substratum: by the agar that adds 1.2% in blue-green alga bloom, high-temperature sterilization 20min, regulates pH=8 to make blue-green alga bloom lysate solid medium.Not adding agar is liquid nutrient medium.

Bacillus cereus Bacillus cereus CGMCC1.0126 described in the present invention, can utilize the bacterium of blue-green alga bloom lysate and Adsorption of Heavy Metals ability to substitute by other.

Utilize the ability of the growth of blue-green alga bloom lysate: by the centrifugal 10min of blue-green alga bloom lysate 10000rpm, be settled out Cells of Blue-green Algae wall, sub-argument goes out supernatant, bacillus cereus is inoculated in lysate supernatant, cultivate 3 days for 35 ℃, bacteria concentration is greater than 10 7cfu/ml, illustrates that bacillus cereus has the ability of utilizing the growth of blue-green alga bloom lysate.

Adsorption of Heavy Metals ability: above-mentioned bacillus cereus is cultivated after 3 days in algae lysate supernatant, mixes with heavy metal wastewater thereby mixture with the volume ratio of 1:3, regulating pH is 5~6, and temperature is 25 ℃, absorption 30min.After absorption, detect bacillus cereus the adsorption rate of heavy metal Cd, Ni, Cu is reached respectively to 55%, 45%, 45%, illustrate that bacillus cereus counterweight metal has certain adsorptive power.

In the present invention, the blue-green alga bloom algae mud of salvaging in field all can use, wide material sources.

Blue-green alga bloom outburst is great environmental hazard.The a large amount of propagation of blue-green algae has not only suppressed the normal growth of other biological in water body, has destroyed the eubiosis, and the secondary pollution that a large amount of frond rots to cause causes and has a strong impact on water surrounding.From water body, salvaging blue-green alga bloom is one of method of effectively eliminating wawter bloom harm.Often be only at present the bloom blue algae of pulling out and reach tens thousand of tons from Taihu Lake, but before the Cyanophyceae of fishing for, there is no good treatment process, easily produce secondary pollution.Now blue-green alga bloom is changed into a kind of biologic water cleaner, after culturing micro-organisms, process containing heavy metal containing sewage again, efficiently utilized, contribute to eliminate wawter bloom harm.

Present method is used the blue-green alga bloom of salvaging in lake, will after blue-green alga bloom cracking, make solid medium and liquid nutrient medium, and on solid medium, bacillus cereus grows into bacterium colony, inoculates enlarged culturing in liquid nutrient medium.After microorganism reaches certain biomass, by blue-green alga bloom and microorganism co-absorbed heavy metal ion.This method has not only been used the frond of blue-green algae in blue-green alga bloom, and the organism simultaneously also algae cracking being produced changes into the nutritive substance with Adsorption of Heavy Metals ability thalline, and the synergy of phycomycete, had both improved adsorption efficiency greatly, had also avoided secondary pollution.This utilizes pattern can greatly economize on resources, improve the development of environmental ecology, promotion new bio water purification agent.

In this invention, blue-green alga bloom biologic water cleaner reaches respectively 90%, 80%, 75% to the adsorption rate of heavy metal Cd, Ni, Cu.Change blue-green alga bloom into a kind of biologic water cleaner from a kind of waste, can effectively process the heavy metal ion in heavy metal wastewater thereby, with respect to traditional process for treating heavy-metal waste water, saved the energy, simplified treating processes.Cultivate bacillus cereus with blue-green alga bloom lysate, not only saved microbiological culture media, and avoided the organic contamination of blue-green alga bloom lysate, also improve the adsorption rate of blue-green alga bloom to heavy metal ion simultaneously.This invention has been processed the pollution to water body of heavy metal and organism on the one hand using blue-green alga bloom as biologic water cleaner, also solved on the other hand the transition problem of a large amount of blue-green alga blooms as waste simultaneously.

In this invention, select to have the bacterial classification of special purification of heavy metal sewage ability, bacterial classification is put in blue-green alga bloom lysate and cultivated three days, bacteria concentration is greater than 10 7cfu/ml, illustrates that blue-green alga bloom can be used as a kind of resource of effective culturing micro-organisms.This invention can economize on resources on the one hand in the time of culturing micro-organisms, has also avoided the secondary pollution of the lysate of blue-green alga bloom simultaneously, and this waste of blue-green alga bloom is fully used.

Embodiment

While there is wawter bloom, salvage blue-green alga bloom summer in lake, because water content is larger, can fall most water by filter-cloth filtering and form algae mud, detects blue-green alga bloom dry weight and can reach 5%.

By the agar that adds 1.2% in blue-green alga bloom, high-temperature sterilization 20min, regulates pH=8 to make blue-green alga bloom lysate solid medium.Not adding agar is liquid nutrient medium.

Utilize the ability of the growth of blue-green alga bloom lysate to measure: by the centrifugal 10min of blue-green alga bloom lysate 10000rpm, be settled out Cells of Blue-green Algae wall, isolate supernatant, bacillus cereus Bacillus cereus CGMCC1.0126 is inoculated in lysate supernatant, cultivate 3 days for 35 ℃, bacteria concentration is greater than 10 7cfu/ml, illustrates that bacillus cereus has the ability of utilizing the growth of blue-green alga bloom lysate.

Adsorption of Heavy Metals ability: above-mentioned bacillus cereus is cultivated after 3 days in algae lysate supernatant, mixes with heavy metal wastewater thereby mixture with the volume ratio of 1:3, regulating pH is 5~6, and temperature is 25 ℃, absorption 30min.After absorption, detect bacillus cereus the adsorption rate of heavy metal Cd, Ni, Cu is reached respectively to 55%, 45%, 45%, illustrate that bacillus cereus counterweight metal has certain adsorptive power.

By direct algae mud pyroprocessing 20min, be cooled to room temperature, regulate pH=8, access bacillus cereus, enlarged culturing 3 days under 35 ℃ of environment." bacillus cereus-frustule fragment " suspension is biologic water cleaner product.

Above-mentioned biologic water cleaner is put in heavy metal-containing waste water, and the volume ratio of mixture and heavy metal-containing waste water is 1:3.Regulating pH is 5~6, and temperature is 25 ℃, clarification time 30min.The adsorption rate of Cd in heavy metal wastewater thereby, Ni, Cu is reached respectively to 90%, 80%, 75%.When purification, preferably have to stir to arrange, can allow blue-green alga bloom fully contact with heavy metal ion with bacillus cereus, improve purification efficiency.After purification, with filter-cloth filtering, blue-green alga bloom is collected to airing, recyclable burning heat production.

Claims (1)

1. a method of processing heavy metal wastewater thereby with bloom blue algae, is characterized in that comprising the following steps:
1) prepare biologic water cleaner: by the bloom blue algae algae mud high-temperature sterilization of salvaging, regulate pH to 8.0, under the condition of 120 ℃, by centrifugal bloom blue algae lysate 10000 rpm 10 min, be settled out Cells of Blue-green Algae wall, isolate supernatant; By bacillus cereus ( bacillus cereus) CGMCC1.0126 is inoculated in lysate supernatant, in the shaking table of 35 ℃ or in fermentor tank, cultivates 3 days, bacteria concentration is greater than 10 7cfu/ml, is prepared into suspension, is biologic water cleaner;
2) Adsorption of Heavy Metal Ions: by 1) in biologic water cleaner mix with the volume ratio of 1:3 with heavy metal wastewater thereby, regulate pH be 5 ~ 6, temperature is 25 ℃, absorption 30min;
3) post-processed: by mixture flocculation sediment, the filter dehydration of bloom blue algae, bacillus cereus and heavy metal wastewater thereby, the burning residual dregs obtaining reclaims heavy metal or further processes rear landfill.
CN201310120448.2A 2013-04-08 2013-04-08 Method for treating heavy-metal wastewater by using biological water purifying agent prepared from cyanobacteria bloom CN103232116B (en)

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CN104059864B (en) * 2014-05-26 2016-08-24 绍兴柯桥江滨水处理有限公司 One strain Bacillus cereus and preparation method thereof, application
CN104743632B (en) * 2015-03-12 2016-11-30 同济大学 A kind of method of graphene oxide composite alga removing
CN107381819A (en) * 2016-05-17 2017-11-24 甘肃德福生物科技有限公司 A kind of method of the chlorella sewage heavy metal biological comprehensive regulation
CN106277356B (en) * 2016-08-28 2019-12-03 铜仁市万山区盛和矿业有限责任公司 A kind of preparation method of water purification agent
CN106186362B (en) * 2016-08-28 2019-04-16 铜仁市万山区盛和矿业有限责任公司 A kind of environment-friendly type water purification agent
CN106617043A (en) * 2016-09-22 2017-05-10 苏州太阳都生化技术有限公司 Preparation method and application of bloom cyanobacteria nutrient solution
CN106430633B (en) * 2016-12-11 2018-09-18 湖南科技大学 A kind of method that bacillus cereus removes heavy metal manganese in water removal
CN107881115B (en) * 2017-12-05 2020-12-01 武汉文科生态环境有限公司 Anabaena and application thereof in removing cadmium in environment
CN108048101A (en) * 2017-12-07 2018-05-18 合肥郑国生物科技有限公司 A kind of method for preparing soil heavy metal passivant using cyanobacteria algal gel and clay mineral
CN108862600A (en) * 2018-06-20 2018-11-23 罗国球 A kind of biological adsorption recovery method of heavy metals in industrial wastewater

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CN202046976U (en) * 2011-05-05 2011-11-23 蒋雨新 Heavy metal sewage treatment device

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