Sewage treatment works odour measurement

Abstract

Public concern over odours from sewage treatment works is increasing. More people are being exposed to odours, due to development around existing works or the construction of new works. Raised awareness of both the environment and individual rights has meant people are now more likely to complain. Odourabatement and control is a major issue for sewage works operators. To control odours, they must first be measured. This is no easy task as response to odours is subjective and our understanding of the sense of smell is incomplete. In assessing an odour nuisance, odour formation, emission, dispersion and perception must be considered. There is no single measure that is suitable for this purpose. Odour measurements fall into two classes. Analytical measurements characterise odours in terms of their chemical composition and are more suited to formation, emission and dispersion models. Unfortunately, they tell us little about the perceived effect of the odour. Sensory measurements employ the human nose and characterise odours in terms of their perceived effect. A link between analytical and sensory measurements is clearly needed. In this paper data collected from odour surveys at 17 different wastewater treatment sites are evaluated to explore possibilities for linking analytical and sensory measures. The relationship between hydrogen sulphide concentration and odour concentration as measured by threshold olfactometry is explored. Correlations suggest power-law relationships between hydrogen sulphide and odour concentration, with r2 values as high as 0.69. This paper will assess the use of hydrogen sulphide (H2S) and olfactometry measurements for a range of unit operations and abatement technologies.

Conversion of chemical scrubbers to biotrickling filters for VOCs and H2S treatment at low contact times

“…Although a quantitative relation between odor removal and the removal of a particular pollutant is often not feasible (Lebrero et al, 2013), several authors have correlated the removal of H 2 S with odor when H 2 S is the predominant pollutant (Akdeniz et al, 2012;Gostelow and Parsons, 2000). Probably, the majority of the odor removal found herein could be attributed to the biodegradation of H 2 S, while residual odor concentrations between 2400 and 7600 OU m -3…”

“…Therefore, some organic compounds found such as toluene (Table 3), which are common compounds in different parts of a WWTP (Gostelow and Parsons, 2000;Dincer and Muezzinoglu, 2008) that are not biologically treated, may be stripped out from the liquid phase to the gas phase. Though, this has not been studied and is subject of further investigation.…”

Olfaktometrik Yöntem ile Atıksu Arıtma Tesisi Ünitelerinde Koku Düzeylerinin Belirlenmesi

“…Koku algısı kişiden kişiye farklılık göstermekle birlikte kokudan olumsuz yönde etkilenmede kokunun konsantrasyonu, frekansı, süresi, hedonik tonu ve yoğunluğu gibi parametreler etkili olur [10]. Bu doğrultuda değerlendirildiğinde koku; "insanda koku alma duyusunu harekete geçiren ve kokunun algılanmasına neden olan uçucu maddelerin yarattığı etki" olarak tanımlanır [11].…”

Research on the Influences of Insulation Technology by Plastic Greenhouses on Working Temperature in Aeration Tanks in Cold Areas in Winter

“…Scholars at home and abroad had done a lot of theoretical and experimental researches on strengthening the sewage treatment technology [1][2]. Developed countries in cold regions such as North America and Nordic Europe had advanced pollution-control technology and management experience.…”