Task 2.0 -- Air quality assessment, control, and analytical methods: Subtask 2.11 -- Lactic acid FGD additives from sugar beet wastewater. Final report

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Organic buffers maintain the pH of the scrubber slurry in flue gas desulfurization as the SO{sub 2} dissolves at the air-liquid interface. Inexpensive acids with an appropriate pKa are required for this application. The pKa of lactic acid (3.86) is between that of the interface and the recirculating slurry and will make soluble calcium ions available in large amounts. Currently lactic acid is somewhat expensive for this, but the project work will lead to development of a new source of inexpensive lactate. Microbial action during the storage and processing of sugar beets forms lactic acid in concentrations as high as ... continued below

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17 p.

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Olson, E.S. June 1, 1998.

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Description

Organic buffers maintain the pH of the scrubber slurry in flue gas desulfurization as the SO{sub 2} dissolves at the air-liquid interface. Inexpensive acids with an appropriate pKa are required for this application. The pKa of lactic acid (3.86) is between that of the interface and the recirculating slurry and will make soluble calcium ions available in large amounts. Currently lactic acid is somewhat expensive for this, but the project work will lead to development of a new source of inexpensive lactate. Microbial action during the storage and processing of sugar beets forms lactic acid in concentrations as high as 14 g/L in the processing water. The concentrations are lower than those occurring in conventional fermentation production of lactic acids, but since a considerable amount of water is involved in the processing of sugar beets in the Red River Valley, a substantial amount of lactic acid or calcium lactate could be recovered as a byproduct for use in flue gas desulfurization (FGD) and other applications. The feasibility of two novel lactate recovery schemes applicable to dilute streams was evaluated in the project.

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17 p.

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OSTI as DE98059393

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  • Other Information: PBD: Jun 1998

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  • Other: DE98059393
  • Report No.: DOE/MC/30097--28
  • Grant Number: FC21-93MC30097
  • DOI: 10.2172/290962 | External Link
  • Office of Scientific & Technical Information Report Number: 290962
  • Archival Resource Key: ark:/67531/metadc679956

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  • June 1, 1998

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  • July 25, 2015, 2:20 a.m.

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  • May 2, 2016, 1:40 p.m.

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Olson, E.S. Task 2.0 -- Air quality assessment, control, and analytical methods: Subtask 2.11 -- Lactic acid FGD additives from sugar beet wastewater. Final report, report, June 1, 1998; Grand Forks, North Dakota. (https://digital.library.unt.edu/ark:/67531/metadc679956/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.