Remarkable Improvement of JIS CODMn by an Effective Colorimetric Method.

誠治, 石井; 紘平, 浦野

doi:10.2965/jswe.22.301

Cited by 5 publications

(1 citation statement)

References 1 publication

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“…Initial and final dissolved oxygen (DO), pH, and initial dissolved phosphorus (DP) were measured. Analytical methods used in this study were as follows: DO was measured with a DO meter (LDO HQ10, Hack, USA), pH with a pH meter (B-212, Horiba, Japan), DN by persulfate digestionautomated cadmium reduction method (American Public Health Association et al, 1998), DP by persulfate digestion method (Japanese Industrial Standard, 1998), COD Cr by closed reflux -colorimetric method (American Public Health Association et al, 1998) and COD Mn by effective colorimetric method (Ishii and Urano, 1999). All the equipment used were prewashed with diluted hydrochloric acid (1+11) to avoid phosphorus contamination.…”

Section: Biodegradation Test Proceduresmentioning

confidence: 99%

Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan

Kishimoto

Ueno²

2011

J. of Wat. & Envir. Tech.

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The influence of phosphorus concentration on the biodegradation of dissolved organic matter (DOM) was discussed as a possible cause of the accumulation of chemical oxygen demand by acidic permanganate method (COD Mn) in Lake Biwa. Enhancement of oxygen consumption in the biodegradation test by dissolved phosphorus (DP) was observed in Lake Biwa water with the natural bacterial community. The response-curve of the oxygen consumption on DP was expressed by a modified Michaelis-Menten type equation with a threshold. The threshold of DP for oxygen consumption was in the range of 0.0031 to 0.0040 mgP/L. The pseudo first-order biodegradation rate constant of DOM was estimated to be 0.0022 d-1 in 1980s and 0.0014 d-1 in 2000s based on DP in the northern basin of Lake Biwa. Consequently, DOM in 2000s was expected to be 1.6 times higher than that in 1980s from mass balance analysis. Since the ratio of COD Mn observed in 2000s to that in 1980s in the northern basin of Lake Biwa was 1.3, it was likely that the deterioration of bioactivity for DOM degradation contributed to the accumulation of COD Mn in Lake Biwa.

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Section: Biodegradation Test Proceduresmentioning

confidence: 99%

Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan

Kishimoto

Ueno²

2011

J. of Wat. & Envir. Tech.

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Probable problems in the analysis of chemical oxygen demand of wastewaters treated by advanced oxidation process: residual H2O2 and acidity of the treated waters

Xiao

Okajima

Ohsaka

2016

Desalination and Water Treatment

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Synergetic Effect of Ultrasound Irradiation in the COD Removal and Degradation of L-Ascorbic Acid in Aqueous Solution by Aerobic Treatment

Terakado¹,

Ueki²,

Hirasawa³

2009

High Temperature Materials and Processes

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The ultrasound irradiation and simultaneous oxygen bubbling into the L-ascorbic acid aqueous solution has been studied in order to establish a cost-effective oxidation process for wastewater treatment. The application of ultrasound considerably increases the decomposition rate, while the relative chemical oxygen demand (COD) value is essentially unchanged. The influence of various process parameters, such as temperature and oxygen flow rate, has been studied. Moreover, we have carried out preliminary experiments on the influence of the addition of metal oxide particles, i.e. SiO 2 and TiO 2 . The effects of particles on the degradation of AH 2 and the COD compounds are discussed.

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Remarkable Improvement of JIS CODMn by an Effective Colorimetric Method.

Cited by 5 publications

References 1 publication

Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan

Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan

Probable problems in the analysis of chemical oxygen demand of wastewaters treated by advanced oxidation process: residual H2O2 and acidity of the treated waters

Synergetic Effect of Ultrasound Irradiation in the COD Removal and Degradation of L-Ascorbic Acid in Aqueous Solution by Aerobic Treatment

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