scholarly journals Methane Concentration in Fiji Air: A Study of its Emission Trends and Source Strengths

2003 ◽  
Vol 21 (1) ◽  
pp. 20
Author(s):  
Francis Mani ◽  
Kanayathu Koshy ◽  
Matakite Maata
Keyword(s):  
Methane Concentration ◽  
Hot Springs ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Ambient Air ◽  
Western Side ◽  
Rubbish Dump ◽  
The University ◽  
Cattle Farms

In this study we have developed an in house capacity at the Chemistry Department, the University of the South Pacific, to analyze methane in ambient air to a precision of 1.5% using a custom converted Gas Chromatograph with FID detector. The technical support to develop this capacity was provided by our overseas partner, National Institute of Water and Atmospheric Research (NIWA). The air samples were collected from known sources of methane such as the digester at the sewage treatment plant, rubbish dump, wetlands, sugar cane burning in the western side of Viti Levu, geothermal emission in Vanua Levu, rice farms and cattle farms from September 2001 to June 2002 and were analyzed. Through inter-laboratory measurements involving NIWA a mean drift of 0.8% was obtained. The methane concentration in the ambient air has a seasonal cycle with a minimum during late January and a maximum during the July to August period. The digester at the sewage plant recorded the maximum concentration of approximately 70 ppmv followed by Lami rubbish dump with values ranging from 4.37 ? 13.35 ppmv. The data from cattle farms, wetlands, rice farms and hot springs recorded emissions in the range of 2.00 ? 5.11 ppmv, 1.85 ? 4.25 ppmv, 1.77 ? 2.62 ppmv and 2.06 ? 1.90 ppmv respectively.

scholarly journals Instrumental measurement of odour nuisance in city agglomeration using electronic nose

2018 ◽  
Vol 28 ◽  
pp. 01012 ◽  
Author(s):  
Bartosz Szulczyński ◽  
Tomasz Dymerski ◽  
Jacek Gębicki ◽  
Jacek Namieśnik
Keyword(s):  
Electronic Nose ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Reference Method ◽  
Monitoring Network ◽  
Ambient Air ◽  
Processing Plant ◽  
Production Plant ◽  
Oil Processing

The paper describes an operation principle of odour nuisance monitoring network in a city agglomeration. Moreover, it presents the results of investigation on ambient air quality with respect to odour obtained during six-month period. The investigation was carried out using a network comprised of six prototypes of electronic nose and Nasal Ranger field olfactometers employed as a reference method. The monitoring network consisted of two measurement stations localized in a vicinity of crude oil processing plant and four stations localized near the main emitters of volatile odorous compounds such as sewage treatment plant, municipal landfill, phosphatic fertilizer production plant. The electronic nose prototype was equipped with a set of six semiconductor sensors by FIGARO Co. and one PID-type sensor. The field olfactometers were utilized for determination of mean concentration of odorants and for calibration of the electronic nose prototypes in order to provide their proper operation. Mean monthly values of odour concentration depended on the site of measurement and on meteorological parameters. They were within 0 – 6.0 ou/m3 range. Performed investigations revealed the possibility of electronic nose instrument application as a tool for monitoring of odour nuisance.

On the Issue of Monitoring Odor-Generating Volatile Pollutants during Sewage Treatment Plant Operation

2020 ◽  
pp. 52-55
Author(s):  
EV Zaritskaya ◽  
PA Ganichev ◽  
AYu Mikheeva ◽  
OL Markova ◽  
GB Yeremin ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
High Performance ◽  
Local Population ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Analytical Techniques ◽  
Ambient Air ◽  
Sewage Treatment Plants ◽  
Study Results

Summary. Introduction: The problem of strong offensive odor produced by operation of sewage treatment plants is known to be quite pressing and common. It is now related to the fact that urban development made these plants, once built on the outskirts, appear within city boundaries, near summerhouses and cottage villages. Malodor is perceived by local population as a sign of poor ambient air quality that evokes negative emotions and unfavorable reflex responses and makes most people feel unwell. Materials and methods: We analyzed sewage sludge from wastewater treatment plants for the whole range of chemicals that can migrate into ambient air and identified priority odor-generating pollutants. Sewage sludge testing was carried out in simulated conditions using advanced high-precision analytical techniques such as mass-spectrometry, spectrophotometry, fluorimetry, gas chromatography, and high performance liquid chromatography. Conclusions: Based on study results, we developed a list of chemicals subject to laboratory monitoring and substantiated the expediency of their detection in the presence of public complaints of offensive odors coming from sewage treatment plants.

scholarly journals George Edward Pelham Box. 10 October 1919 — 28 March 2013

2015 ◽  
Vol 61 ◽  
pp. 23-37 ◽  
Author(s):  
A. F. M. Smith
Keyword(s):  
World War Ii ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Theory And Practice ◽  
North Carolina State University ◽  
Princeton University ◽  
The North ◽  
Leave Of Absence ◽  
The University

George Box was a British industrial and academic statistician who made seminal contributions to theory and practice in the areas of quality control, time-series analysis, the design of experiments, and Bayesian inference, and was the recipient of many awards and honours. He left school at the age of 16 years and, following his early interest in chemistry, found employment as the assistant to the chemist who managed the local sewage treatment plant. While working at the plant, he enrolled for a chemistry degree course with the University of London's External System, but soon after the outbreak of World War II he joined the army and ceased working on the degree. While in the army he was tasked with conducting biochemical experiments relating to the effects of mustard gas but came to realize that the real expertise required was that of a statistician rather than a chemist. After the war he enrolled at University College London and obtained a BSc in mathematics and statistics. From 1948 to 1956 he was employed as an industrial statistician at Imperial Chemical Industries (ICI). While at ICI he took a year's leave of absence in 1953 to serve as a visiting professor at the North Carolina State University at Raleigh. He then returned to ICI but in 1956 accepted a post at Princeton University as director of the university's Statistical Techniques Research Group. In 1959 he left Princeton for the University of Wisconsin–Madison, where in 1960 he founded the University of Wisconsin's Department of Statistics, retiring as an emeritus professor in 1991. He was a man of great personal humour and warmth who cared deeply about his colleagues and was much loved in return by his many students and collaborators.

Advanced process of microbiological control of wastewater in combined system of disinfection with UV radiation

2010 ◽  
Vol 61 (10) ◽  
pp. 2469-2475 ◽  
Author(s):  
P. Bilotta ◽  
L. A. Daniel
Keyword(s):  
Uv Radiation ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Degree Of Contamination ◽  
Combined System ◽  
Operational Conditions ◽  
E Coli ◽  
Microbiological Control ◽  
The University

The purpose of this study was to present a methodology with superior efficiency for inactivating pathogenic indicators commonly found in domestic sewage. The adopted method was based on synergistic effect resulting from the introduction of a UV radiation pre-disinfection stage of sewage followed by secondary treatment. A pilot unit was installed in the sewage treatment plant of the University of São Paulo to simulate the combined system in full-scale operational conditions. Its performance was evaluated through microbiological examinations for determining Escherichia coli, total coliforms and coliphages. The application of UV radiation at 5.1 mW/cm2 for 10 s of exposure in the first disinfection stage was enough to reduce the surviving number of E. coli around 100 times, in comparison to the conventional method. Therefore, based on experimental data, it is possible to conclude that combining treatment and pre-disinfection stage is an effective potential technique to produce effluents with lower degree of contamination by pathogenic organisms.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operation

2008 ◽  
Vol 37 (2) ◽  
Author(s):  
Maciej Walczak
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Treatment Plants ◽  
Plant Operation ◽  
Treated Sewage ◽  
Microbiological Parameters ◽  
Microbial Indices

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operationThis paper reports the results of studies of microbiological changes in the water quality of the Vistula and Brda rivers after the opening of sewage treatment plants in Bydgoszcz. The study involved determining the microbiological parameters of water quality. Based on the results obtained, it was found that the quality of the water in both rivers had improved decidedly after the opening of the plants, although an increased number of individual groups of microorganisms was found at the treated sewage outlet from one of the plants.

Properties of Nocardiaform Actinomycetes Isolated from a Sewage Treatment Plant of Southern Part of Miyagi.

2000 ◽  
Vol 36 (4) ◽  
pp. 161-171
Author(s):  
KENITSU KONNO ◽  
NAOKI ABE ◽  
YOSHIRO SATO ◽  
KOJI AKAMATSU ◽  
MAKOTO ABE ◽  
...  
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant
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