Comparison Study of Different BOD Tests in the Determination of BOD₇Evaluated in a Model Domestic Sewage

Abstract

The aim of this research was to study the suitability of a manometric respirometric test (OECD 301F) for the determination of biological oxygen demand (BOD) in domestic wastewater. This was done by comparing four different BOD tests (a manometric respirometric test, oxygen sensor determination, iodometric titration, and UV absorption measurement) and by evaluating the BOD7 value after a short-term measurement applying the manometric respirometric test. Measurements were done in three different laboratories. The respirometric test was performed well on municipal sewage, and the precision of results was good. There were minor deviations between BOD7 values as determined by the different methods, but the deviations were not essentially big enough to have a practical impact. Evaluation of the BOD7 value after two or three days' incubation by the respirometric method was shown to work well; average deviations between measured and evaluated values after three days' incubation were 5–18%. Hence, the manometric respirometric test proved to be a rapid and suitable tool for process control purposes.

Evaluation of Water Quality Functions of Conventional and Advanced Soil-Based Onsite Wastewater Treatment Systems

“…By contrast, a conventional drainfield is gravity‐fed with anoxic wastewater to a layer of crushed and washed stone that serves as storage during periods of large volume use, with little opportunity for aeration. Timed‐dosing controls for shallow, narrow drainfields provide consistent moisture levels, preventing the extended saturation periods experienced by conventional drainfields (Rubin and Janna, 2006). Together, these design variations are expected to result in differences in the extent and mechanisms of wastewater renovation.…”

Nota Técnica: Demanda Bioquímica De Oxigênio Em Diferentes Tempos De Incubação Das Amostras

“…Neste trabalho, de maneira semelhante, foi observado nas amostras de esgoto sanitário, que quanto maior a concentração de material orgânico, maior a fração biodegradável e maior o afastamento da da , para tempos maiores que 5 dias, e maior a aproximação para menores que 5 dias. A título de exemplo, ao se considerar o fator de correção obtido para o ESB, ao se estimar a DBO 5 a partir do valor de DBO 7 , obtido por Roppola et al (2007), utilizando o método iodométrico, que foi de 56 mg L -1 , obtémse o valor de 41 mg L -1 .…”

“…Posteriormente, passou a ser adotado em quase todo o mundo, a fi m de se propiciar comparações entre valores obtidos em estudos realizados em diferentes regiões do globo. Como exceção as análises padronizadas, pode-se citar o trabalho de Roppola et al (2007) que compararam diversos métodos de quantifi cação (respirométrico, iodométrico e sensores de oxigênio) para obtenção da . Já na Índia, preconiza-se que a análise seja feita após 3 dias de incubação da amostra, sob temperatura de 27 o C ( (HYDROLOGY PROCEDURES, 1999).…”

Characterisation of organic fractions of pulp and paper mill wastewater with a manometric respirometric biochemical oxygen demand method and automatic chemical oxygen demand analyses

“…The pressure decline is a measure of the biochemical oxygen demand (mgyL). A detailed description of the principle of this method is reported in the earlier articles (Roppola et al, 2006(Roppola et al, , 2007.…”

“…Recently, the authors of this paper have published articles dealing with comparing the manometric respirometric test and conventional chemical methods in the determining the BOD at pulp and paper mills (Roppola et al, 2006) and for domestic (Roppola et al, 2007) wastewater. In these studies, the BOD 7 values were estimated after a short term measuring period (1 -3 days) for process control purposes.…”