Methyl Isoborneol (MIB) and Geosmin Removal During Ozone-biofiltration Treatment PDF Download

Author: Peng Pei
Publisher:
ISBN:
Category : Odors
Languages : en
Pages : 444

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Author: Paul Westerhoff
Publisher: American Water Works Association
ISBN: 1583213961
Category : Drinking water
Languages : en
Pages : 224

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Author: Brijesh Nair Nalinakumari
Publisher:
ISBN:
Category : Algae
Languages : en
Pages : 74

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Author: Hanbai Park
Publisher:
ISBN:
Category :
Languages : en
Pages : 137

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Common taste and odor compounds in drinking water include 2-methylisoborneol (2-MIB) and trans-1,10-dimethyl-trans-9-decalol (geosmin). These compounds are difficult to remove through conventional water treatment. Thus, additional research is necessary to find cost-effective methods for removal of geosmin and MIB. The effects of algaecides and chemicals in various conditions (dosage, pH, temperature, turbulence, biodegradation) on geosmin and MIB were investigated, and compounds were analyzed through gas chromatograph and mass spectrometric methods (GC/MS) with solid-phase microextraction (SPME). The experiments were performed using both deionized water and lake water samples. At the recommended manufacturer's dosages of six chemicals (Earth Tec®, Cutrine Plus, Algimycin PWF, Sulfuric Acid, Phycomycin SCP, Calcium chloride dehydrate), removals of geosmin and MIB were unsatisfactory. Acidic conditions were shown to remove the compounds through dehydration. In pH experiments, MIB started to be removed as pH was reduced and was completely removed at pH 3.0. Geosmin showed removal at pH 3.5 and complete removal at pH 2.0. When the samples were returned to neutral (pH=7.5) using sodium hydroxide, geosmin was recovered around 50%, while MIB remained dehydrated. For biodegradation experiments, geosmin was volatilized around 10 -30% and MIB was volatilized around 5-10% for 8 days, but there was negligible impact of biodegradation. In temperature and turbulence experiments, geosmin and MIB removals showed negligible impacts of temperature and turbulence. In futher experiments, three chemicals were found to remove geosmin and MIB as follows: sodium sulfate 70-80%, calcium chloride dehydrate 40-50%, copper sulfate 40%-70%, all at high dosages.

Author: Bilgen Yüncü
Publisher:
ISBN:
Category :
Languages : en
Pages : 165

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Author: Chih Huang
Publisher:
ISBN:
Category :
Languages : en
Pages : 180

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Author: Hoang Nguyen Tran
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 448

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Author: Black & Veatch Corporation
Publisher: John Wiley & Sons
ISBN: 1118210557
Category : Science
Languages : en
Pages : 1109

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New edition covers the latest practices, regulations, and alternative disinfectants Since the publication of the Fourth Edition of White's Handbook of Chlorination and Alternative Disinfectants more than ten years ago, the water industry has made substantial advances in their understanding and application of chlorine, hypochlorite, and alternative disinfectants for water and wastewater treatment. This Fifth Edition, with its extensive updates and revisions, reflects the current state of the science as well as the latest practices. Balancing theory with practice, the Fifth Edition covers such important topics as: Advances in the use of UV and ozone as disinfectants Alternative disinfectants such as chlorine dioxide, iodine, and bromine-related products Advanced oxidation processes for drinking water and wastewater treatment New developments and information for the production and handling of chlorine Latest regulations governing the use of different disinfectants For each disinfectant, the book explains its chemistry, effectiveness, dosing, equipment, and system design requirements. Moreover, the advantages and disadvantages of each disinfectant are clearly set forth. References at the end of each chapter guide readers to the primary literature for further investigation. Authored and reviewed by leading experts in the field of water and wastewater treatment, this Fifth Edition remains an ideal reference for utilities, regulators, engineers, and plant operators who need current information on the disinfection of potable water, wastewater, industrial water, and swimming pools.

Author: Bridget McDowall
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 426

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Author: Rangesh Srinivasan
Publisher:
ISBN:
Category :
Languages : en
Pages : 221

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Most of the challenges in drinking water treatment arise out of contaminants that are present in extremely low concentrations and have properties that make them extremely difficult to be removed by conventional treatment methods. This study tries to look at the treatment of two such microcontaminants's serchlorate and MIB (Methyl Isoborneol)/ Geosmin. Perchlorate (ClO4- ) is a major inorganic contaminant in drinking water and has been detected in a number of public drinking water systems nationwide and has serious health impacts associated with it. A complete and critical review on this intriguing contaminant is presented including a detailed discussion on sources of contamination, the policy aspects including regulation and the available treatment technologies and their feasibility. It is clearly evident that it would not be possible to achieve compete removal of perchlorate with the direct application of a single technology and it is highly likely that a combination of these technologies would have to be employed to overcome this challenge. Physical removal technologies such as ion exchange are effective for perchlorate but they also generate brines highly concentrated in perchlorate and suffer from selectivity issues. Hence a destruction technology that completely reduces perchlorate to harmless chloride is preferred. This study investigates the potential removal of perchlorate ion in drinking water by combining electrochemical reduction with zero-valent iron reduction and the effectiveness of this technology will serve as a basis to further develop the proposed methodology to purify surface or ground water in target zones at a larger scale. Geosmin and MIB are organic semi-volatile chemicals that can seriously influence the finished quality of drinking water by imparting taste and odor to it even at extremely low concentrations. A critical review of these two taste and odor causing compounds in drinking water is presented with emphasis on the relevant treatment alternatives. Although some of these technologies are more effective and show more promise than the others, much work remains to be done in order to optimize these technologies for removal of MIB and geosmin while being effectively used for treatment of other common contaminants. Studies have shown that activated carbon adsorption is the most effective technology currently available for treatment of these compounds. The impact of adsorbent pore size distribution (PSD) and presence of natural organic matter (NOM) on activated carbon adsorption of MIB and geosmin was evaluated through single solute and multicomponent adsorption of these compounds on three types of activated carbon fibers (ACFs) and one granular activated carbon (GAC). It was seen that the experimental data was well defined by single solute adsorption isotherms and both PSD and NOM were major factors influencing adsorption. The binary adsorption of MIB and geosmin on ACFs and GAC was well defined by the ideal adsorbed solute theory (IAST), which is a well established thermodynamic model for multicomponent adsorption. There were no significant differences in the binary isotherm between the oxic and anoxic conditions, indicating that adsorption was purely through physical adsorption and no oligomerization was taking place.