VARIABILITY OF EMISSION RATE DEFINITION IN REGULATORY ODOUR DISPERSION MODELLING FROM CIVIL WASTEWATER TREATMENT PLANTS

AbstractThe purpose of the present article was to determine odour emission rate from primary settling tanks after hermetisation. The paper presents the results of the research on odour emission from four settling tanks, covered with self-supporting aluminium domes with a diameter of 52 meters, located on urban wastewater treatment plants, with the planned flow capacity equal to 200 000 m3/day. Altogether, the olfactometry analysis of 189 samples of polluted air pulled from the domes with the use of an air blower which has efficiency of 12 000 m3/h was conducted. The results of odour concentration measurements were in a range of approximately 10 800 to 763 600 ouE/m3. Average odour emission rate was equal to 102 ouE/(s · m2). The obtained value is much higher than the literature data, available for non-hermetised settlers only. This rate enables better estimation of the odour stream that has to be deodorised after sealing the settling tanks.

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Application of dispersion modelling to odour assessment: a practical tool or a complex trap?

Water Science & Technology ◽

10.2166/wst.2000.0096 ◽

2000 ◽

Vol 41 (6) ◽

pp. 81-88 ◽

Cited By ~ 10

Author(s):

A. McIntyre

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plants ◽

Control Measures ◽

Dispersion Modelling ◽

Modelling Techniques ◽

Treatment Facilities ◽

Practical Tool ◽

Odour Control ◽

The Individual ◽

Odour Annoyance

The use of modelling techniques for predicting the dispersion of odours from wastewater treatment plants is considered in relation to both the resolution of odour problems and the design requirements for new facilities. The issues of community odour annoyance and nuisance are discussed in the context of modelling averaging times, short-term odour peaks and the nature of the individual odours. In addition, the derivation of acceptable odour annoyance criteria is discussed with a comparison of different international approaches and a practical approach to resolving design criteria is proposed. Four case studies include the analysis and resolution of severe odour problems at two major wastewater treatment facilities and the evaluation of “Cordons Sanitaire” in the planning of new housing developments. In the first two cases, modelling was used to identify the most significant processes in terms of off-site effects and then to assess the required abatement level to achieve an acceptable complaints frequency. Inthe third case, dispersion modelling was used to assess the effectiveness of planned odour control measures in the release of land for residential development. The fourth case study demonstrates how an overly-stringent approach to odour control can cause problems.

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Bioaerosolization and pathogen transmission in wastewater treatment plants: Microbial composition, emission rate, factors affecting and control measures

Chemosphere ◽

10.1016/j.chemosphere.2021.132180 ◽

2021 ◽

pp. 132180

Author(s):

Sampriti Kataki ◽

Rupam Patowary ◽

Soumya Chatterjee ◽

Mohan G. Vairale ◽

Sonika Sharma ◽

...

Keyword(s):

Wastewater Treatment ◽

Emission Rate ◽

Wastewater Treatment Plants ◽

Pathogen Transmission ◽

Control Measures ◽

Microbial Composition ◽

Factors Affecting ◽

And Control

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

Pollack Periodica ◽

10.1556/606.2020.15.2.13 ◽

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.

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