CN110845004B - Method for enhancing biological degradation of triclosan in nitration system by using surfactant - Google Patents

Method for enhancing biological degradation of triclosan in nitration system by using surfactant Download PDF

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CN110845004B
CN110845004B CN201911157766.XA CN201911157766A CN110845004B CN 110845004 B CN110845004 B CN 110845004B CN 201911157766 A CN201911157766 A CN 201911157766A CN 110845004 B CN110845004 B CN 110845004B
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triclosan
surfactant
nitrification
biodegradation
concentration
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CN110845004A (en
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高景峰
贾京鑫
王知其
张达
张文治
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Beijing University of Technology
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    • 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
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1263—Sequencing batch reactors [SBR]
    • 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
    • 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
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C02F2101/345—Phenols
    • 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
    • C02F2101/30—Organic compounds
    • C02F2101/36—Organic compounds containing halogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/04—Surfactants, used as part of a formulation or alone
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • 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

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  • Biodiversity & Conservation Biology (AREA)
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Abstract

A method for enhancing the biological degradation of triclosan in a nitrification system by using a surfactant relates to the technical field of biological sewage treatment. According to the invention, the surfactant is added into the nitrification system, so that the dissolution and desorption of the triclosan are promoted, the microbial community structure in the nitrification system is changed, the functional bacteria are enriched, the generation of some new bacteria is stimulated, and the biodegradation of the triclosan in the nitrification system is further improved. Meanwhile, the biological surfactant rhamnolipid added in the invention can improve the biological degradation rate of triclosan by 30.9 percent at most. The method has the advantages of simple technical operation, low cost, no secondary pollution, safety and high efficiency, can be applied to actual sewage treatment plants, and is a reliable method for reducing the triclosan pollution.

Description

Method for enhancing biological degradation of triclosan in nitration system by using surfactant
The technical field is as follows:
the invention relates to the technical field of biological sewage treatment, in particular to a method for promoting biodegradation of triclosan in a nitrification system.
Background art:
triclosan (TCS) is widely used worldwide as a broad spectrum antimicrobial agent. Triclosan is widely used in personal care products, medical, household, and other everyday consumer products, such as soaps, toothpastes, shampoos, and the like. The annual production of triclosan is currently about 1500 tons and triclosan usage continues to increase rapidly in some regions. However, triclosan is difficult to biodegrade in humans and animals. Therefore, the natural environment becomes the primary accommodation site for triclosan. Most of the triclosan enters the sewage treatment plant through a municipal pipe network, so that the sewage treatment plant becomes a source for spreading the triclosan to the nature, and it is reported that more than 90% of the triclosan after use is gathered in the sewage treatment plant, and then a considerable amount of the triclosan is discharged into the water environment from the sewage treatment plant. However, studies have shown that triclosan has some damage to mouse liver and some toxicity to fish and algae. In addition, triclosan is itself an endocrine disrupting substance and is frequently detected in body fluids, the maternal emulsion. Furthermore, triclosan is converted into phenol, 2, 4-dichlorophenol and a carcinogen dioxin under the action of light, and great harm is caused to underground water and surface water. Therefore, in order to control the discharge of triclosan from the source, reducing the harm of triclosan to the environment is an urgent need to be solved in the current field of environmental pollution control.
At present, there are many methods for removing triclosan in sewage treatment plants, such as adsorption, advanced oxidation, biodegradation and the like. However, the adsorption method does not degrade triclosan, and the subsequent adsorbent treatment is easy to cause secondary pollution. Advanced oxidation processes require stringent reaction conditions and higher processing costs. This makes it difficult to apply the adsorption method and the advanced oxidation method to actual sewage treatment plants on a large scale. The biodegradation method has low operation cost and no secondary pollution, and can be widely applied to actual sewage plants on a large scale. However, the low solubility of triclosan causes the triclosan to have low bioavailability, thereby limiting the biological utilization of the triclosan by microorganisms, and causing the triclosan to have low biodegradation rate in sewage plants, and the biodegradation rate is only maintained at 40-60%.
As an environment-friendly substance, the surfactant has both hydrophobic group and hydrophilic group, can be gathered along gas-liquid and liquid-liquid interfaces, and can reduce surface tension and promote the dissolution and biodegradation of hydrophobic organic matters. The surfactant can also improve the degrading enzyme activity of cells and promote the biodegradation of hydrophobic organic matters by microorganisms. In addition, the research on the surfactant for promoting the biodegradation of hydrophobic organic matters in soil also exists, and the research on the surfactant for promoting the biodegradation of triclosan in river bottom mud also relates to the research on the surfactant for promoting the biodegradation of triclosan in the river bottom mud. However, no report has been made at present on the promotion of triclosan biodegradation in nitrification systems by surfactants.
The invention aims to provide a method for improving the biodegradation rate of triclosan in a nitrification system.
Disclosure of Invention
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for enhancing the biological degradation of triclosan in a nitrification system by using a surfactant comprises the following steps:
step 1: the reaction device is a sequencing batch reactor, the concentration of the sludge is 5500-6500mg/L, and the sludge is taken from nitrification tank floc activated sludge of a municipal sewage treatment plant;
step 2: adding a surfactant into the triclosan wastewater, so that the surfactant enters the sequencing batch reactor along with the triclosan wastewater and performs nitration reaction at normal temperature, and further, the nitrated activated sludge in the sequencing batch reactor finishes biodegradation of triclosan.
Wherein, the concentration of the triclosan in the sewage in the step 2 is 1.5-9.0 mg/L.
Wherein, the type of the surfactant in the step 2 is rhamnolipid, sophorolipid or sodium dodecyl benzene sulfonate, and the concentration of the surfactant is 20-25 mg/L;
wherein the ammonia nitrogen concentration of the nitration reaction in the step 2 is 50-60mg/L, COD and 160-180 mg/L.
Wherein, the nitration reaction in the step 2 is carried out at normal temperature, the temperature is 25 +/-2 ℃, and the pH value is 7.5-8.5.
Wherein the nitration reaction in the step 2 is a sequencing batch reaction, the single-period aeration time is 4h, the reaction lasts for 4 periods every day, and each period runs for 28 days. The single cycle operation is as follows: feeding water for 5min, aerating for 240min, precipitating for 15min, discharging water for 5min, standing for 95min, and discharging water at a rate of 50%.
Compared with the prior art, the method has the advantages that the surfactant enters the nitrification system along with the sewage to promote the biological degradation of the triclosan, the operation is simple, the cost for removing the triclosan is reduced, and the method can be applied to actual sewage treatment plants. And the surfactant is a substance with low toxicity, so that secondary pollution is avoided, and the method is a reliable method for reducing triclosan pollution.
Drawings
FIG. 1 is a graph showing the effect of adding biosurfactant rhamnolipid on the biological degradation of triclosan under different triclosan concentrations;
FIG. 2 is a graph showing the effect of adding biosurfactant sophorolipid on the biodegradation of triclosan at different triclosan concentrations;
FIG. 3 is a graph showing the effect of adding sodium dodecyl benzene sulfonate as a chemical surfactant on the biological degradation of triclosan at different triclosan concentrations;
Detailed Description
In order to facilitate the technical solutions and specific implementation results of the present invention to be well understood by those skilled in the art, the embodiments are described below with reference to the accompanying drawings:
example 1
The floc activated sludge is put into a sequencing batch reactor with a working volume of 3L, the drainage ratio is 50 percent, and the sludge concentration is 6000 mg/L. The artificial water distribution is adopted to simulate the triclosan wastewater, wherein the ammonia nitrogen concentration in the triclosan wastewater is 56mg/L, COD concentration of 170mg/L, the adding concentration of the triclosan is divided into 4 stages which are 1.5mg/L, 3.0mg/L, 6.0mg/L and 9.0mg/L in sequence, and each stage is operated for 28 days. Simultaneously, a biosurfactant rhamnolipid is added into the triclosan wastewater, and the concentration of the rhamnolipid is 22.5 mg/L. The rhamnolipid enters the sequencing batch reactor along with the triclosan wastewater to carry out nitration reaction at normal temperature, and then the nitrated activated sludge in the sequencing batch reactor finishes biodegradation of triclosan.
In order to verify the influence of adding biosurfactant rhamnolipid on the biological degradation of triclosan, a group of control tests are set: the floc activated sludge is put into a sequencing batch reactor with a working volume of 3L, the drainage ratio is 50 percent, and the sludge concentration is 6000 mg/L. The artificial water distribution is adopted to simulate the triclosan wastewater, wherein the ammonia nitrogen concentration in the triclosan wastewater is 56mg/L, COD concentration of 170mg/L, the adding concentration of the triclosan is divided into 4 stages which are 1.5mg/L, 3.0mg/L, 6.0mg/L and 9.0mg/L in sequence, and each stage is operated for 28 days.
At the end of each phase, the mass conservation experiment of the triclosan is carried out on the experimental group and the control group, the biodegradation rate of the triclosan in the experimental group and the control group is measured, and the experimental result is shown in figure 1. The data results of fig. 1 show that the triclosan biodegradation rate in the control group was 75.49%, 85.90%, 75.93%, and 78.56% in sequence over the 4 stages. And the biodegradation rate of the triclosan in the experimental group is 98.82%, 98.33%, 98.31% and 98.11% in sequence. Compared with the method without adding the surfactant, the addition of the biosurfactant rhamnolipid can obviously improve the biodegradation rate of the triclosan, and respectively improves 30.90%, 14.47%, 29.47% and 24.89% in four stages.
Example 2
The floc activated sludge is put into a sequencing batch reactor with a working volume of 3L, the drainage ratio is 50 percent, and the sludge concentration is 6000 mg/L. The triclosan wastewater is simulated by adopting artificial water distribution, wherein the ammonia nitrogen concentration in the triclosan wastewater is 56mg/L, COD and 170 mg/L. The adding concentration of the triclosan is divided into 4 stages, the adding concentration is 1.5mg/L, 3.0mg/L, 6.0mg/L and 9.0mg/L in sequence, and each stage runs for 28 days. Simultaneously, adding a biosurfactant sophorolipid into the triclosan wastewater, wherein the concentration of the sophorolipid is 22.5 mg/L. So that the sophorolipid enters the sequencing batch reactor along with the triclosan wastewater to carry out nitration reaction at normal temperature, and further the nitration activated sludge in the sequencing batch reactor finishes the biodegradation of the triclosan.
In order to verify the influence of adding biosurfactant sophorolipid on the biological degradation of triclosan, a group of control tests are set: the floc activated sludge is put into a sequencing batch reactor with a working volume of 3L, the drainage ratio is 50 percent, and the sludge concentration is 6000 mg/L. The triclosan wastewater is simulated by adopting artificial water distribution, wherein the ammonia nitrogen concentration in the triclosan wastewater is 56mg/L, COD and 170 mg/L. The adding concentration of the triclosan is divided into 4 stages, the adding concentration is 1.5mg/L, 3.0mg/L, 6.0mg/L and 9.0mg/L in sequence, and each stage runs for 28 days.
At the end of each phase, the experiment group and the control group are subjected to a triclosan mass conservation experiment, and the triclosan biodegradation rate in the experiment group and the control group is determined, wherein the experiment result is shown in figure 2. The data results of fig. 2 show that the triclosan biodegradation rate in the control group was 75.49%, 85.90%, 75.93%, and 78.56% in sequence over the 4 stages. And the biodegradation rate of the triclosan in the experimental group is 96.89%, 97.71%, 97.98% and 96.62% in sequence. Compared with the method without adding the surface active agent, the biological surface active agent sophorolipid is added, so that the biodegradation rate of the triclosan can be obviously improved, and the biodegradation rate is respectively improved by 28.35%, 13.75%, 29.04% and 22.99% in four stages.
Example 3
The floc activated sludge is put into a sequencing batch reactor with a working volume of 3L, the drainage ratio is 50 percent, and the sludge concentration is 6000 mg/L. The triclosan wastewater is simulated by adopting artificial water distribution, wherein the ammonia nitrogen concentration in the triclosan wastewater is 56mg/L, COD and 170 mg/L. The adding concentration of the triclosan is divided into 4 stages, the adding concentration is 1.5mg/L, 3.0mg/L, 6.0mg/L and 9.0mg/L in sequence, and each stage runs for 28 days. And simultaneously, adding a chemical surfactant of sodium dodecyl benzene sulfonate into the triclosan wastewater, wherein the concentration of the sodium dodecyl benzene sulfonate is 22.5mg/L, so that the sodium dodecyl benzene sulfonate enters the sequencing batch reactor along with the triclosan wastewater to carry out nitration reaction at normal temperature, and further, the nitration activated sludge in the sequencing batch reactor finishes biodegradation of triclosan.
In order to verify the influence of adding the chemical surfactant sodium dodecyl benzene sulfonate on the biological degradation of the triclosan, a group of control tests are set: the floc activated sludge is put into a sequencing batch reactor with a working volume of 3L, the drainage ratio is 50 percent, and the sludge concentration is 6000 mg/L. The triclosan wastewater is simulated by adopting artificial water distribution, wherein the ammonia nitrogen concentration in the triclosan wastewater is 56mg/L, COD and 170 mg/L. The adding concentration of the triclosan is divided into 4 stages, the adding concentration is 1.5mg/L, 3.0mg/L, 6.0mg/L and 9.0mg/L in sequence, and each stage runs for 28 days.
At the end of each phase, the experiment group and the control group are subjected to a triclosan mass conservation experiment, and the triclosan biodegradation rate in the experiment group and the control group is determined, wherein the experiment result is shown in figure 3. The data results of fig. 3 show that the triclosan biodegradation rate in the control group was 75.49%, 85.90%, 75.93%, and 78.56% in sequence over the 4 stages. And the biodegradation rate of the triclosan in the experimental group is 97.05%, 89.05%, 84.38% and 89.87% in sequence. Compared with the method without adding the surfactant, the addition of the chemical surfactant of the sodium dodecyl benzene sulfonate can also improve the biodegradation rate of the triclosan by 28.56 percent, 3.67 percent, 11.13 percent and 14.40 percent in four stages respectively.
In conclusion, the addition of the surfactant can promote the biological degradation of the nitrified activated sludge on the triclosan, and can also show strong action effect under the condition of high concentration of the triclosan. Meanwhile, compared with the chemical surfactant of sodium dodecyl benzene sulfonate, the biological surfactant of rhamnolipid and sophorolipid has more obvious effect of promoting the biodegradation of triclosan. The method is simple to operate, reduces the cost for removing the triclosan, and can be applied to actual sewage treatment plants. And the surfactant is a substance with low toxicity, so that secondary pollution is avoided, and the method is a reliable method for reducing triclosan pollution.
The above is only a preferred embodiment of the present invention, and various changes and modifications may be made to the present invention by those skilled in the art. Any modification or improvement made within the principle of the present invention should be within the scope of the present invention.

Claims (4)

1. A method for enhancing the biological degradation of triclosan in a nitrification system by using a surfactant is characterized by comprising the following steps:
step 1: the reaction device is a sequencing batch reactor, the concentration of the sludge is 5500-6500mg/L, and the sludge is taken from nitrification tank floc activated sludge of a municipal sewage treatment plant;
step 2: adding a surfactant into the triclosan wastewater, so that the surfactant enters the sequencing batch reactor along with the triclosan wastewater and performs nitration reaction at normal temperature, and further, the nitrated activated sludge in the sequencing batch reactor finishes biodegradation of triclosan;
the concentration of the triclosan in the sewage in the step 2 is 1.5-9.0 mg/L;
the surfactant in step 2 is rhamnolipid, sophorolipid or sodium dodecyl benzene sulfonate, and the concentration of the surfactant is 20-25 mg/L.
2. The method for enhancing the biodegradation of triclosan in a nitrification system by using a surfactant as claimed in claim 1, wherein the concentration of ammonia nitrogen in the nitrification reaction in step 2 is 50-60mg/L, COD and 160-180 mg/L.
3. The method for enhancing the biodegradation of triclosan in a nitrification system using a surfactant according to claim 1, wherein the nitrification reaction in step 2 is carried out at ambient temperature, at a temperature of 25 ± 2 ℃, and at a pH of 7.5 to 8.5.
4. The method for enhancing biodegradation of triclosan in a nitrification system with a surfactant as recited in claim 1, wherein the nitrification reaction in step 2 is a sequencing batch reaction, with a single aeration period of 4 hours, 4 cycles per day, and 28 days of operation in each stage; the single cycle operation is as follows: feeding water for 5min, aerating for 240min, precipitating for 15min, discharging water for 5min, standing for 95min, and discharging water at a rate of 50%.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010991A1 (en) * 1990-12-19 1992-07-09 The Procter & Gamble Company Methods for making oral compositions
JP2003041293A (en) * 2001-07-30 2003-02-13 Kao Corp Slime remover for drain outlet and gadget for slime removal
CN101746890A (en) * 2008-12-19 2010-06-23 中国石化上海石油化工股份有限公司 Method for reducing excess sludge yield of aerobic unit in activated sludge and sewage treatment process
KR20110129216A (en) * 2010-05-25 2011-12-01 포항공과대학교 산학협력단 Process for recalcitrant highly halogenated organic pollutants remova
CN102276065A (en) * 2011-07-22 2011-12-14 大庆沃太斯化工有限公司 Application of rhamnolipid biosurfactant in chemical sewage treatment
CN103787495A (en) * 2014-01-21 2014-05-14 同济大学 Method for removing triclosan from wastewater in reduction manner by virtue of zero-valent zinc under anaerobic condition
CN107265815A (en) * 2017-07-25 2017-10-20 安徽海东环保科技有限公司 Sewage treatment process in septic tank
CN108117165A (en) * 2016-11-29 2018-06-05 中国石油化工股份有限公司 A kind of processing method of ammonia-containing water

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101883485A (en) * 2007-10-02 2010-11-10 世界矿物公司 Enhanced retention capabilities through methods comprising surface treatment of functional particulate carrier materials, and functional particulate carrier materials made therefrom
GB2501940A (en) * 2012-05-11 2013-11-13 Robert Timothy Gros Method of manufacturing antimicrobial examination gloves
EP3356356B1 (en) * 2015-10-01 2021-05-26 Firmenich Incorporated Compounds useful as modulators of trpm8
SE1650321A1 (en) * 2016-03-09 2017-06-27 Veolia Water Solutions & Tech Biological removal of micropollutants from wastewater
CN107365017A (en) * 2017-07-25 2017-11-21 安徽海东环保科技有限公司 domestic sewage treatment process

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010991A1 (en) * 1990-12-19 1992-07-09 The Procter & Gamble Company Methods for making oral compositions
JP2003041293A (en) * 2001-07-30 2003-02-13 Kao Corp Slime remover for drain outlet and gadget for slime removal
CN101746890A (en) * 2008-12-19 2010-06-23 中国石化上海石油化工股份有限公司 Method for reducing excess sludge yield of aerobic unit in activated sludge and sewage treatment process
KR20110129216A (en) * 2010-05-25 2011-12-01 포항공과대학교 산학협력단 Process for recalcitrant highly halogenated organic pollutants remova
CN102276065A (en) * 2011-07-22 2011-12-14 大庆沃太斯化工有限公司 Application of rhamnolipid biosurfactant in chemical sewage treatment
CN103787495A (en) * 2014-01-21 2014-05-14 同济大学 Method for removing triclosan from wastewater in reduction manner by virtue of zero-valent zinc under anaerobic condition
CN108117165A (en) * 2016-11-29 2018-06-05 中国石油化工股份有限公司 A kind of processing method of ammonia-containing water
CN107265815A (en) * 2017-07-25 2017-10-20 安徽海东环保科技有限公司 Sewage treatment process in septic tank

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
Biodegradation potential of wastewater micropollutants by ammonia-oxidizing bacteria;Hyungkeun Roh等;《Chemosphere》;20091130;第77卷(第8期);第1084-1089页 *
Degradation of Triclosan under Aerobic, Anoxic, and Anaerobic Conditions;Prajeesh Gangadharan Puthiya Veetil等;《Applied Biochemistry and Biotechnology》;20120211;第167卷;第1603–1612页 *
DNA-based stable isotope probing identifies triclosan degraders in nitrification systems under different surfactants;Jia Jing-Xin等;《BIORESOURCE TECHNOLOGY》;20200117;第302卷;第1-11页 *
Removal of triclosan in nitrifying activated sludge: Effects of ammonia amendment and bioaugmentation;Do GyunLee等;《Chemosphere》;20150430;第125卷;第9-15页 *
Rhamnolipid-enhanced aerobic biodegradation of triclosan (TCS) by indigenous microorganisms in water-sediment systems;Qian Guo等;《Science of The Total Environment》;20161115;第571卷;第1304-1311页 *
三氯生在两种典型污水处理***中去除的研究;王京敏;《中国优秀硕士学位论文全文数据库 中国优秀硕士学位论文全文数据库》;20160215(第02期);B027-644 *

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