• Title/Summary/Keyword: removal of microorganism

Search Result 199, Processing Time 0.084 seconds

Charateristics of Akalophilic Microorganism Developed for Color Removal of Dye (염료의 색도 제거를 위해 개발된 호알칼리성 미생물의 특성)

  • Lee, Hyun-Wuk;Lim, Dong-Joon
    • Textile Coloration and Finishing
    • /
    • v.22 no.2
    • /
    • pp.145-154
    • /
    • 2010
  • An alkalophilic microorganism capable of degrading dyes was developed for the treatment of alkaline dye solution. This strain was identified as Pseudomonas species. Using this microorganism, biological treatment of dye was studied in Erlenmeyer flasks. The characteristics of this microorganism were observed under various incubating-condition such as temperature, pH, nitrogen source, and macronutrients concentration. The removal effciencies of Disperse Red 60 from synthetic wastewater were 33.5 ~ 36.9% at the range of $30{\sim}40^{\circ}C$, and they were 31.1 ~ 36.7% at the range of initial pH 8 ~ pH 10, respectively. The optimal culture medium was found to be 0.25%(w/v) yeast extract, 0.25%(w/v) polypeptone, 0.1%(w/v) $KH_2PO_4$, 0.2%(w/v) $MgSO_4{\cdot}7H_2O$, and 1.0%(w/v) $Na_2CO_3$. In treatment of various dyes using Erlenmeyer flasks, the removal effciencies of Disperse Blue 87, Disperse Yellow 64, Disperse Red 60, Acid Blue 193, Acid Red 138, and Direct Yellow 23 were found to be 76%, 71%, 58%, 93%, 94%, and 90% respectively after 24hrs reaction of alkalophilic strain Pseudomonas sp. YBE-12.

Organic Removal Efficiency and Toxicity Evaluation of Persistent Microorganism from Dye Wastewater Treatment using a Photooxidation system (광산화시스템을 이용한 염색폐수의 유기물 처리효율 및 잔류미생물의 독성 평가)

  • Jung, Ho Jun;Rhee, Dong Seok
    • Journal of Industrial Technology
    • /
    • v.29 no.A
    • /
    • pp.83-88
    • /
    • 2009
  • The removal efficiency of organic compounds and the toxicity evaluation of microorganism have been studied in dye wastewater treatment using $UV/TiO_2$ and $UV/H_2O_2$ photooxidation system. Sample waters tested in this work were raw dye wastewater and dye wastewater treated in $UV/TiO_2$ and $UV/H_2O_2$ photooxidation system respectively. Total organic carbon(TOC) removal rate was 50% in $UV/TiO_2$ process and 80% in $UV/H_2O_2$ process. It has been investigated with colony counting agar method and paper disk method whether the type of treatment process has affected the microorganism growth. In the raw wastewater, more than four types of microorganisms have survived. But, little of microorganisms were alive at TOC removal rate of 50% in $UV/TiO_2$ system. In contrast to that, two types of microorganisms were found at TOC removal rate of 80% in $UV/H_2O_2$ system.

  • PDF

동전기-생물학적복원기술과 계면활성제를 이용한 phenanthrene 오염토양의 정화

  • 김상준;박지연;이유진;양지원
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • 2004.09a
    • /
    • pp.186-190
    • /
    • 2004
  • The electrokinetic bioremediation employing electrolyte circulation method was carried out for the cleanup of phenanthrene-contaminated kaolinite, and microorganism used in the biodegradation of phenanthrene was Sphingomonas sp. 3Y. The electrolyte circulation method supplied ionic nutrientsand the microorganism into soil, and inhibited the significant pH change of soil by increasing the soil buffering capacity by providing phosphate buffer compounds. When the remediation process was conducted without surfactant, the removal efficiency of phenanthrene, at the initial concentration of 200 ppm, was 69% for only 7 days. Higher microbial population and lower phenanthrene concentration were observed in the anode and middle regions of soil specimen than in the cathode region. The higher density of microorganism was because the microbial movement was in the direction of the anode part due to the negative surface charge. When Triton X-100 and APG of 20 g/1 were used to improve the bioavailability of phenanthrene strongly adsorbed onto soil surface, about 90 and 39% of phenanthrene removal were obtained. Consequently, it was confirmed that the microorganism preferred APC to phenanthrene as carbon source and so the removal efficiency with APG decreased less than that without APG.

  • PDF

Nitrogen Removal using Autotrophic Microorganism in Membrane-Attached Biofilm Reactor (MABR) (Membrane-Attached Biofilm Reactor(MABR)에서의 독립영양 미생물을 이용한 질소 제거)

  • Shin, Jeong-Hoon;Sang, Byoung-In;Chung, Yun-Chul;Choung, Youn-Kyoo
    • Journal of Korean Society on Water Environment
    • /
    • v.21 no.6
    • /
    • pp.624-629
    • /
    • 2005
  • The purpose of this study is to investigate the performance of nitrogen removal using autotrophic microorganism in the Membrane-Attached Biofilm Reactor (MABR). The treatment system consists of an aerobic MABR (R1) for nitrification and an anaerobic MABR (R2) for hydrogenotrophic denitrification. Oxygen and hydrogen were supplied through the lumen of hollow-fiber membranes as electron acceptor and donor, respectively. In phase Ι, simultaneous organic carbon removal and nitrification were carried out successfully in R1. In phase II, to develop the biofilm on the hollow-fiber membrane surface and to acclimate the microbial community to autotrophic condition, R1 and R2 were operated independently. The MABRs, R1 and R2 were connected in series continuously in phase III and operated at HRT of 8 hr or 4 hr with $NH_4{^+}-N$ concentration of influent, from 150 to 200 mgN/L. The total nitrogen removal efficiency reached the maximum value of 99% at the volumetric nitrogen loading rate of $1.20kgN/m^3{\cdot}d$ in the combined MABR system with R1 and R2. The results in this study demonstrated that the combined MABR system could operate effectively for the removal of nitrogen in wastewater not containing organic materials and can be used stably as a high rate nitrogen removal technology.

Biological Removal Phosphorus Containing Swine Wastewater (생물학적 처리에 의한 돈사폐수의 인제거)

  • 신남철;박정호
    • Journal of Environmental Health Sciences
    • /
    • v.26 no.4
    • /
    • pp.15-20
    • /
    • 2000
  • The studies of swine wastewater treatment aim to development of process using soil microorganism. Removal rate of swine wastewater containing organic matter was 99 percent in case of high loading rate. Microorganism was devoted to improve the treatment efficiency of the process. According to the result obtained from biological treatment of high loading rate swine wastewater. Hydraulic retention time was 2.3 days in unit process of biological phosphorus removal. BO $D_{rm}$ / $P_{rm}$ ratio was 1122 in room temperature anaerobic process and 355.6 in mesophilic anaerobic process. And then phosphorus removal rate mesophilic anaerobic process was 3 time as much as than room temperature acaerobic process.

  • PDF

Analysis of the Survey on the Consumer's Knowledge and Laundry Habits to Microorganisms Living in Clothing (의류 중의 미생물에 대한 소비자의 지식과 세탁습관 실태조사 분석)

  • 최해운;정찬진;박명자
    • The Research Journal of the Costume Culture
    • /
    • v.10 no.6
    • /
    • pp.781-792
    • /
    • 2002
  • Microorganisms living in clothing cause damage to fabric as well as unhygienic conditions with unpleasant odor fur wearers. Removal or growth of microorganisms are affected by the conditions during washing and storage. The purpose of this research was to study the consumer's knowledge and habits in laundering with respect to microorganisms in clothing. For survey method, questionnaires were administered to 580 housewives, age of 20∼60s living in Seoul. Employing 479 respondents, the data were analyzed by using descriptive statistics. The results are as follows: The level of knowledge about microorganisms of clothing was high in general, but wasn't expert level. Many people had experienced damages of textiles, clothing and unpleasant odor due to microorganisms. Fabric softeners and bleaches were rarely used for disinfection but usually used for antistatic, whitening or removal of stains. There was no relationship between laundering habits, the knowledge of microorganism, and experience of clothing damage by microorganism.

  • PDF

Effect of Drycleaning on the Removal of Microorganisms (Part 1) (드라이클리닝에 의한 미생물 제거효과(제1보))

  • 신정숙;차옥선
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.19 no.3
    • /
    • pp.548-559
    • /
    • 1995
  • The purpose of this study was 1) to investigate the effect of drycleaning on the removal of microorganisms according to on the conditions or the kinds of drycleaning solvent about the Quantity of microorganism which remains in kinds of the drycleaning solvent and the sludge after drycleaning. 2) to investigate the removal effect of :microorganisms in using drycleaning solvent repeatedly 3) to investigate the kinds of microorganism living in textiles. The re, ;ultras of tai, ; study were as follows; 1) less microorganisms remains in perchloroethylen than in petroleum solvent. The most microorganisms was isolated at the beginning stage during the drycleaning. 2) In fresh drycleaning solvents, Pseudomonas aeruginosa ATTIC 27853, taphylococcsu atreus ATTIC 6538. and Candida albicans 10529 were killed immediately, while in case of pesters solvents used for 6 month-drycleaning, Pseudomonas Aeruginosa ATTIC 27853 were survived a lot of still in 17 days. 3) On the kind of bacteria in textile goods, Pseudomonas acidovorans and Ewsipelothrix rhusiopathiae are isolated. a genus Rhodetorula is observed through microscope. On the kind of fungi in textile goods, genus Penicillins and genus Apergillus are found through microscope, genus Caddie and genus Trichophyton are found with shapes.

  • PDF

Studies on the Application of Microorganism to Control the Bulking of Paper Mill Wastewater (제지폐수 벌킹제어를 위한 미생물 적용 연구)

  • 이성호;조준형
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.34 no.3
    • /
    • pp.32-37
    • /
    • 2002
  • The paper mill wastewater actually generating bulking was used to apply to the spot. Batch and continuous type pilots were used in this study. Optimal time after propagating generation of activated sludge in aeration basin by adding Hoc forming microorganism was 24 and 36hours while optimal time of activated sludge in original aeration basin was 60hours. Showing the difference of sedimentation velocity at 7th day after operating a pilot continuously, SV30 was decreased to 50% at 13th day. COD value in aeration basin with floe forming microorganism was 35mg/L while COD value in original aeration basin was 52mg/L. It was indicated that application of Hoc forming microorganism can control the bulking of paper mill wastewater by shortening of recovery time and improving of pollution removal efficiency.

Purification Technology in Closed Water like a Reservoir and Pond using Oxygen Solubilized Device and Standardized Microorganism Culture System (산소용해수와 미생물제재를 이용한 호소 및 폐쇄수역의 정화기술)

  • Seo, Seong-nyeo;Kim, Young-taek;Park, Chul-hwi
    • Journal of Korean Society on Water Environment
    • /
    • v.21 no.2
    • /
    • pp.118-124
    • /
    • 2005
  • The oxygen solubilized device(O.S.D) and standardized microorganism culture system is more efficient than physical and chemical purification techniques in closed water. This study was to determine how the O.S.D and standardized culture system is efficient in purification capacity in closed water based on the lab scale and pilot plant. In the batch test, inducing the quantitative results from pilot plant operation condition, removal efficiency of COD and TN were about 48.3% and 35% respectively, while SS and chlorophyll-a were 94.9% and 68.7%. The pilot plant results showed that suspended solid(SS) and chlorophyll-a removal efficiency were 60% and 59% respectively, due to coagulation characteristics by standardized culture. Total nitrogen(TN) and total phosphorus(TP)showed good effect for the purification of target pond water quality from field data. Additionally, released velocity was determined in control condition of $5.31mgPO{_4}^{3-}{\cdot}m^{-2}{\cdot}day^{-1}$ and $2486.8mgCOD{\cdot}m^{-2}{\cdot}day^{-1}$. Otherwise, phosphate and COD reflux in the aeration and microorganism condition was showed $-9.95mgPO{_4}^{3-}{\cdot}m^{-2}{\cdot}day^{-1}$ and $-397.88mgCOD{\cdot}m^{-2}{\cdot}day^{-1}$. This technology is the most effective not only removal of SS and chlorophyll-a but also control of phosphate and COD release which is very important phenomena in evaluating water quality in closed water like a reservoir and pond.

Investigation on the effects of microbial community presence and survival to the water quality performance of urban stormwater nature-based solutions

  • Geronimo, Franz Kevin;Guerra, Heidi;Jeon, Minsu;Reyes, Nash jett;Kim, Lee-Hyung
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2022.05a
    • /
    • pp.139-139
    • /
    • 2022
  • Nature-based solutions (NBS) involved conservation or rehabilitation of natural ecosystems or the creation of natural processes in modified or artificial ecosystems to mimic natural processes for the improved management of water (UN-Water, 2018). This study investigated the relationship between microbial presence and survival to the pollutant treatment performance of seven different stormwater NBS managing urban stormwater runoff. In this study, seven different stormwater nature-based solution (NBS) was investigated to identify the relationship of microbial community to the pollutant removal performance of stormwater NBS. Based on this study, Proteobacteria was found to be the most dominant microorganism for all stormwater NBS and IS followed by Acidobacteria and Actinobacteria. Acidobacteria, Actinobacteria, Chloroflexi, Gemmatimonadetes, WS3, and AF234118_p were found to have high positive correlation to most pollutant removal efficiency of different stormwater NBS (r-value: 0.62 to 0.68). Using Proteobacteria and Acidobacteria count in stormwater NBS, equations predicting pollutant removal performance were also developed and may be used in minimizing the cost for stormevent monitoring to identify the pollutant removal performance of stormwater NBS.

  • PDF