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3 results on '"Yuta Masumori"'

1. Characteristics of foulants of forward osmosis membranes used in municipal wastewater concentration processes

Author

Onoda Sosuke, Tomoki Takahashi, Yuta Masumori, Masahiro Yasukawa, Taro Miyoshi, and Hideto Matsuyama

Subjects
chemistry.chemical_classification, Chromatography, Fouling, Chemistry, Membrane fouling, Forward osmosis, Ocean Engineering, 02 engineering and technology, 010501 environmental sciences, 021001 nanoscience & nanotechnology, 01 natural sciences, Pollution, law.invention, Membrane, Chemical engineering, Wastewater, law, Humic acid, Organic matter, 0210 nano-technology, Filtration, 0105 earth and related environmental sciences, Water Science and Technology
Abstract

This study investigated the organic matter that causes fouling in the forward osmosis (FO) membrane filtration system used in wastewater concentration processes. The development of the fouling of FO membranes caused by actual municipal wastewater was compared with that of the fouling caused by solutions containing artificial foulants (i.e. Aldrich humic acid, bovine serum albumin, and sodium alginate). This comparison shows that the development of the fouling was underestimated when using the artificial foulants. The characteristics of the foulants were investigated using fluorescence excitation-emission matrix spectra and liquid chromatography-organic carbon detection analyses. The results obtained by these advanced analytical methods indicated that the so-called biopolymers (i.e. organic macromolecules mainly comprising polysaccharides and proteins) were the major components of the foulants. In contrast, hydrophobic organic matter, such as humic substances, was not a dominant component.

Published
2016
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3. Evaluation of energy production from municipal wastewater using forward osmosis process and anaerobic membrane bioreactor.

Author

Yuta Masumori, Taro Miyoshi, Masahiro Yasukawa, Tomoki Takahashi, Hideto Matsuyama, and Sosuke Onoda

Subjects
WASTEWATER treatment, ANAEROBIC reactors, OSMOSIS
Abstract

The anaerobic treatment is a potential way to realize the energy production in wastewater treatment. However, it is necessary to increase the organic matter concentration in municipal wastewater. In this study, we proposed a wastewater treatment system that involved an anaerobic membrane bioreactor (AnMBR) combined with a forward osmosis (FO) process to concentrate the wastewater. The energy balance of this system was estimated by the calculation based on the FO condensation test and batch methane fermentation test. The methane yield from the condensed municipal wastewater in the batch methane fermentation test at 40°C was 0.22 m3 -CH4 /kg-CODCr_rem, putting CODCr as the chemical oxygen demand was determined by chromium oxidation method. The energy generated from the yielded methane was estimated to be 0.33 kWh/m3. Nevertheless, the total energy consumption was 0.39 kWh/m3, which was higher than 0.2 kWh/m3 of a conventional activated sludge process. It was found that it is possible to get a net energy if the fermentation temperature in the AnMBR process can be reduced to below 34°C. [ABSTRACT FROM AUTHOR]

Published
2017
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