CONCENTRATIONS OF EARTHY AND MUSTY ODOR COMPOUNDS IN TREATED WASTEWATER FROM DIFFERENT TREATMENT PLANTS

2019 ◽  
Vol 75 (7) ◽  
pp. III_25-III_33
Author(s):  
Taro URASE ◽  
Hirofumi TSUTSUI
Keyword(s):  
Treated Wastewater ◽  
Odor Compounds ◽  
Musty Odor

Occurrence of earthy and musty odor compounds (geosmin, 2-methylisoborneol and 2,4,6-trichloroanisole) in biologically treated wastewater

2013 ◽  
Vol 68 (9) ◽  
pp. 1969-1975 ◽  
Author(s):  
T. Urase ◽  
Y. Sasaki
Keyword(s):  
Wastewater Treatment ◽  
Large Scale ◽  
Treatment Process ◽  
Treated Wastewater ◽  
Small Scale ◽  
Odor Threshold ◽  
Wastewater Treatment Process ◽  
Odor Thresholds ◽  
Odor Compounds ◽  
Musty Odor

The concentrations of earthy and musty odor compounds (2-methylisoborneol (2-MIB), geosmin and 2,4,6-trichloroanisole (TCA)) in treated wastewater were measured. Concentrations of 2,4,6-TCA (4.3–37.7 ng/L) and geosmin (3.7–42.2 ng/L) higher than their odor thresholds were detected for effluents from large-scale treatment plants. The effluent from a small-scale wastewater plant treating toilet and kitchen wastewater contained the target earthy and musty odor compounds below the odor thresholds. The ozonation applied as an advanced wastewater treatment process was considerably more effective for the removal of 2,4,6-TCA than for the removal of 2-MIB and geosmin. The measured concentrations of 2,4,6-TCA in river environments without the influence of large-scale wastewater effluents were less than the odor threshold.

The relationship between musty-odor-causing organisms and water quality in Lake Biwa

1995 ◽  
Vol 31 (11) ◽  
pp. 153-158 ◽  
Author(s):  
M. Kajino ◽  
K. Sakamoto
Keyword(s):  
Water Quality ◽  
Data Analysis ◽  
Green Algae ◽  
Analytical Methods ◽  
Lake Biwa ◽  
Blue Green Algae ◽  
Odor Compounds ◽  
Musty Odor ◽  
The Relationship

Musty odor has occurred annually in Lake Biwa since 1969. Osaka municipal waterworks, which is located downstream of Lake Biwa, has made many efforts to treat musty-odor compounds produced in Lake Biwa from spring through autumn. With the development of analytical methods for the determination of musty-odor compounds, we have been able to confirm that planktonic blue-green algae are the major causes of the musty-odor occurrences. The relationship between the growth of blue-green algae and the water quality was not so apparent. However, through our data analysis focusing on the relationship between musty-odor occurrences due to Phormidium tenue or Oscillatoria tenuis and some nutrients in Lake Biwa, we found that the concentration of nitrate in water may be an important parameter for the estimation of growth of the algae and the musty-odor behavior.

Room temperature determination of earthy-musty odor compounds in water using vacuum-assisted headspace solid-phase microextraction

2016 ◽  
Vol 8 (45) ◽  
pp. 8065-8071 ◽  
Author(s):  
Maria-Lito Glykioti ◽  
Evangelia Yiantzi ◽  
Elefteria Psillakis
Keyword(s):  
Water Samples ◽  
Solid Phase Microextraction ◽  
Room Temperature ◽  
Solid Phase ◽  
Reduced Pressure ◽  
Headspace Solid Phase Microextraction ◽  
Temperature Determination ◽  
Odor Compounds ◽  
Musty Odor

This work proposes non-equilibrium headspace solid-phase microextraction sampling under reduced pressure conditions (Vac-HSSPME) for extracting at room temperature two of the most common earthy-musty odor compounds found in water samples (2-methylisoborneol (MIB) and geosmin).

Earthy-Musty Odor-Producing Cyanophytes Isolated from Five Water Areas in Tokyo

1988 ◽  
Vol 20 (8-9) ◽  
pp. 179-183 ◽  
Author(s):  
A. Matsumoto ◽  
Y. Tsuchiya
Keyword(s):  
Green Algae ◽  
Air Conditioning ◽  
Cooling Tower ◽  
Blue Green Algae ◽  
Odor Compounds ◽  
Musty Odor

Two kinds of 2-methylisoborneol-producing blue-green algae, Oscillatoriageminata and O.limnetica, and three kinds of geosmin-producing algae, O.amoena, O.splendida, and Aphanizomenonflos-aquae, were isolated from a park pond, a fish-cultivation pond, a river, and a reservoir. An oscillatorian species isolated from an air conditioning cooling tower was shown to yield both 2-methylisoborneol and geosmin simultaneously. Care was taken to ensure that the blue-green algae identified were those responsible for the musty odor compounds.

Water Treatment Systems and Technology for the Removal of Odor Compounds

1988 ◽  
Vol 20 (8-9) ◽  
pp. 237-244 ◽  
Author(s):  
K. Hattori
Keyword(s):  
Lake Biwa ◽  
Removal Rate ◽  
Space Velocity ◽  
Raw Water ◽  
Filtration System ◽  
Odor Compounds ◽  
Musty Odor ◽  
Removal Technologies ◽  
Low Efficiency ◽  
Purification Plant

Compounds responsible for a musty odor in Lake Biwa have been detected at Isoshima Point in the Yodo river, the intake point of the Murano Purification Plant of Osaka Prefectural Government. 2-Methylisoborneol (MIB) and geosmin have been measured at maximum concentrations in raw water of 103 ng/l and 362 ng/l, respectively (1983–1986). The rapid sand filtration system normally in use has a low efficiency for the removal of such odor compounds, so a study of the following removal technologies: powdered and granular activated carbon (PAC,GAC), ozone and bio-film, was undertaken. The most effective was GAC treatment (linear velocity: 10–22 m/hr, space velocity: 7–16/hr) which completely removed the musty odor compounds. However, when the removal rate of total organic carbon by the GAC system decreased below 30%, the system's ability to remove the odor from the water also decreased.

scholarly journals Analysis of Five Earthy-Musty Odorants in Environmental Water by HS-SPME/GC-MS

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Zhen Ding ◽  
Shifu Peng ◽  
Weiwen Xia ◽  
Hao Zheng ◽  
Xiaodong Chen ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Storage Time ◽  
Natural Waters ◽  
Solid Phase ◽  
Environmental Water ◽  
Health Concern ◽  
Simple Modification ◽  
Relative Standard ◽  
Odor Compounds ◽  
Musty Odor

The pressing issue of earthy and musty odor compounds in natural waters, which can affect the organoleptic properties of drinking water, makes it a public health concern. A simple and sensitive method for simultaneous analysis of five odorants in environmental water was developed by headspace solid-phase microextraction (HS-SPME) coupled to chromatography-mass spectrometry (GC-MS), includinggeosmin(GSM) and 2-methylisoborneol (2-MIB), as well as dimethyl trisulfide (DMTS),β-cyclocitral, andβ-ionone. Based on the simple modification of original magnetic stirrer purchased from CORNING (USA), the five target compounds can be separated within 23 min, and the calibration curves show good linearity with a correlation coefficient above 0.999 (levels = 5). The limits of detection (LOD) are all below 1.3 ng L−1, and the relative standard deviation (%RSD) is between 4.4% and 9.9% (n = 7) and recoveries of the analytes from water samples are between 86.2% and 112.3%. In addition, the storage time experiment indicated that the concentrations did not change significantly for GSM and 2-MIB if they were stored in canonical environment. In conclusion, the method in this study could be applied for monitoring these five odorants in natural waters.

Kinetics and mechanisms of formation of earthy and musty odor compounds: Chloroanisoles during water chlorination

Chemosphere ◽  
2016 ◽  
Vol 163 ◽  
pp. 366-372 ◽  
Author(s):  
Kejia Zhang ◽  
Xinyan Zhou ◽  
Tuqiao Zhang ◽  
Minmin Mao ◽  
Lei Li ◽  
...  
Keyword(s):  
Mechanisms Of Formation ◽  
Odor Compounds ◽  
Musty Odor ◽  
Water Chlorination
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