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

2007 ◽  
Vol 2007 ◽  
pp. 1-4 ◽  
Author(s):  
Katri Roppola ◽  
Toivo Kuokkanen ◽  
Jaakko Rämö ◽  
Hanna Prokkola ◽  
Eeva Heiska
Keyword(s):  
Impact Evaluation ◽  
Oxygen Sensor ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Municipal Sewage ◽  
Comparison Study ◽  
Short Term ◽  
Practical Impact

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 BOD7value after a short-term measurement applying the manometric respirometric test. Measurements were done in three dif-ferent laboratories. The respirometric test was performed well on municipal sewage, and the precision of results was good. There were minor deviations between BOD7values as determined by the different methods, but the deviations were not essentially big enough to have a practical impact. Evaluation of the BOD7value 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.

scholarly journals Comparison Study of Manometric Respirometric Test and Common Chemical Methods in the Determination ofBOD7in a Pulp and Paper Mill's Wastewaters

2006 ◽  
Vol 2006 ◽  
pp. 1-5 ◽  
Author(s):  
Katri Roppola ◽  
Toivo Kuokkanen ◽  
Hannu Nurmesniemi ◽  
Jaakko Rämö ◽  
Risto Pöykiö ◽  
...  
Keyword(s):  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Comparison Study ◽  
Short Term ◽  
Chemical Methods ◽  
Paper Mills ◽  
The Difference

The biological oxygen demand (BOD) test is widely used in many wastewater treatment plants. The conventional BOD tests are usually time-consuming and the results are often out of date for process control purposes. The aim of this research was to compare the manometric respirometric test with common chemical methods in the determination of BOD of wastewater from a pulp and paper mills as well as to evaluate theBOD7values of both wastewaters from the short-term respirometric measurements. The results showed that there were differences in theBOD7values of paper mill samples measured by conventional and respirometric methods. The main cause was found to be the dilution solution used in the conventional BOD tests. Using the same mineral solution in the respirometric measurements diminished the difference remarkably. Evaluation of theBOD7value after two or three days incubation was proved to work very well and the estimated results were close to measured values (deviations 1%–12%).

A new method for the determination of biological oxygen demand in domestic wastewater by headspace gas chromatography

2013 ◽  
Vol 1308 ◽  
pp. 32-36 ◽  
Author(s):  
Juan-Juan Gu ◽  
Hui-Chao Hu ◽  
Xin-Sheng Chai ◽  
Ying-Xin Tian ◽  
Donald G. Barnes ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Biological Oxygen Demand ◽  
New Method ◽  
Headspace Gas Chromatography ◽  
Headspace Gas

High speed municipal sewage treatment in microbial fuel cell integrated with anaerobic membrane filtration system

2014 ◽  
Vol 69 (12) ◽  
pp. 2548-2553 ◽  
Author(s):  
Y. Lee ◽  
S. W. Oa
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
High Speed ◽  
Membrane Filtration ◽  
Membrane Filter ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Organic Substrate ◽  
Municipal Sewage ◽  
Filtration System

A cylindrical two chambered microbial fuel cell (MFC) integrated with an anaerobic membrane filter was designed and constructed to evaluate bioelectricity generation and removal efficiency of organic substrate (glucose or domestic wastewater) depending on organic loading rates (OLRs). The MFC was continuously operated with OLRs 3.75, 5.0, 6.25, and 9.38 kg chemical oxygen demand (COD)/(m3·d) using glucose as a substrate, and the cathode chamber was maintained at 5–7 mg/L of dissolved oxygen. The optimal OLR was found to be 6.25 kgCOD/(m3·d) (hydraulic retention time (HRT) 1.9 h), and the corresponding voltage and power density averaged during the operation were 0.15 V and 13.6 mW/m3. With OLR 6.25 kgCOD/(m3·d) using domestic wastewater as a substrate, the voltage and power reached to 0.13 V and 91 mW/m3 in the air cathode system. Even though a relatively short HRT of 1.9 h was applied, stable effluent could be obtained by the membrane filtration system and the following air purging. In addition, the short HRT would provide economic benefit in terms of reduction of construction and operating costs compared with a conventional aerobic treatment process.

scholarly journals Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

2019 ◽  
Vol 64 (3) ◽  
pp. 328-339
Author(s):  
Yuhang Cai ◽  
Asad A. Zaidi ◽  
Peiqi Sun ◽  
Yue Shi ◽  
Kun Zhang ◽  
...  
Keyword(s):  
Membrane Reactor ◽  
Urease Activity ◽  
Suspended Solids ◽  
Loading Rate ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Volume Loading ◽  
Interesting Phenomenon

Design of ship sewage treatment systems that not only satisfy the use of small space on board but also meets International Maritime Organisation (IMO) latest emission standards is still a challenging problem for ship industry. This study provides a comparative disquisition between two different MBR reactors i.e, air-lift multilevel circulation membrane reactor (AMCMBR) and anaerobic/anoxic/aerobic membrane reactor (AOA-MBR) for domestic sewage treatment. The influence of pollutants volume loading rate (VLR) and C/N on effluent chemical oxygen demand (COD), ammonium nitrogen (NH4+-N) and TN for marine domestic sewage was analyzed. The results revealed that AMCMBR showed better removal efficiencies for COD and TN than AOA-MBR. The volume of AMCMBR was only half of the AOA-MBR. In addition, high average value of mixed liquor volatile suspended solids (MLVSS)/mixed liquid suspended solids (MLSS) (i.e. 0.75) of AMCMBR indicated high biomass and good pollutants removal achieved by this reactor. An interesting phenomenon was found in the study regarding Urease activity for the two reactors. Urease activity for AMCMBR in different working conditions all exceeded AOA-MBR and there exist no clear difference of NR activities between AMCMBR and AOA-MBR except for low C/N ratio (i.e. 6 and 4). This phenomenon proved that AMCMBR has a greater performance for treating ship domestic wastewater.

Effect of earthworm loads on organic matter and nutrient removal efficiencies in synthetic domestic wastewater, and on bacterial community structure and diversity in vermifiltration

2013 ◽  
Vol 68 (1) ◽  
pp. 43-49 ◽  
Author(s):  
L. M. Wang ◽  
X. Z. Luo ◽  
Y. M. Zhang ◽  
J. J. Lian ◽  
Y. X. Gao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Ammonia Nitrogen ◽  
Domestic Sewage ◽  
Shannon Index

In this paper, we studied the effect of earthworm loads on the removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), total nitrogen, and total phosphorus from synthetic domestic sewage and on the bacterial community structure and diversity of substrates in earthworm packing beds. The different vermifiltrations (VFs), including the control, are successful in removing both organic matter (OM) and nutrients. The removal rate of NH3-N at 12.5 g of earthworm/L of soil VF is higher compared with that at 0 and 4.5 earthworm load VFs. The highest Shannon index, in the earthworm packing bed, occurred at 16.5 earthworm load VF. Furthermore, the COD removal rate is significantly correlated with the Shannon index, which reveals that OM removal for synthetic domestic sewage treatment at VF might be more dependent on bacterial diversity at the earthworm packing bed. The band distributions and diversities of the bacterial community for samples from different earthworm loads in VFs suggest that the bacterial community structure was only affected within the earthworm packing bed when the earthworm load reached a certain level. The present study adds to the current understanding of OM and nutrient degradation processes in VF domestic wastewater treatment.

Determination of Chemical Oxygen Demand in Domestic Wastewater by near Infrared Spectrometry of Seston and Partial Least Squares Calibration

NIR news ◽  
2008 ◽  
Vol 19 (1) ◽  
pp. 8-9 ◽  
Author(s):  
Antonio C. Sousa ◽  
Maria Monica L.M. Lucio ◽  
Ovídeo F. Bezerra Neto ◽  
Glauciene P.S. Marcone ◽  
Alessandra F.C. Pereira ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Least Squares ◽  
Partial Least Squares ◽  
Near Infrared ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Infrared Spectrometry ◽  
Near Infrared Spectrometry

scholarly journals A Comparative Study of the Growth and Nutrient Removal Effects of Five Green Microalgae in Simulated Domestic Sewage

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3613
Author(s):  
Li Ji ◽  
Qili Ge ◽  
Yuan Li ◽  
Yifan Gao ◽  
Shulian Xie
Keyword(s):  
Nutrient Removal ◽  
Day Treatment ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Growth Potential ◽  
Removal Capacity ◽  
Ammonium N ◽  
Parachlorella Kessleri ◽  
Good Potential

Microalgae have shown great potential in wastewater treatment. This study evaluates the growth and nutrient removal characteristics of five different microalgae strains, namely Chlorella vulgaris, Tetradesmus obliquus, Parachlorella kessleri, Hydrodictyon sp., and Scenedesmus quadricauda, in simulated domestic wastewater. The five microalgae could adapt to wastewater, but the growth potential and nitrogen removal capacity were species dependent. The nutrient removal effect of the microalgae used in this experiment was about 50% in the first two days. Parachlorella kessleri, selected from the five strains of green algae, shows good potential in removing nutrients from simulated domestic wastewater. For the simulated domestic sewage treated with Parachlorella kessleri, the chemical oxygen demand was almost completely reduced, and ammonium-N (NH4-N) and total nitrogen (TN) removal exceeded 70% at the end of the 10-day treatment. Total phosphorus (TP) removal was slightly worse, more than 65%. Parachlorella kessleri showed the best growth in sewage with the highest biomass reaching 366.67 mg L−1 and the highest specific growth rate reaching 0.538 d−1. This study can provide a reference for selecting suitable microalgae species to treat actual domestic sewage.

Continuous Estimation of Short Term Oxygen Demand from Respiration Measurements

1991 ◽  
Vol 24 (7) ◽  
pp. 29-32 ◽  
Author(s):  
H. Spanjers ◽  
A. Klapwijk
Keyword(s):  
Oxygen Uptake ◽  
Activated Sludge ◽  
Respiration Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Endogenous Respiration ◽  
Short Term ◽  
Experimental Conditions ◽  
Continuous Estimation ◽  
Activated Sludge Processes

The short Term Oxygen Demand /STOD/ is a valuable parameter for monitoring the influent wastewater and is partieulary important in control of activated sludge processes. In this paper, a method for the continuous estimation of the STOD is described. The method is based on the measurement of three different oxygen uptake rates of the activated sludge: endogenous respiration rate, momentary respiration rate and actual respiration rate. Measurement of the latter needs special experimental conditions. The respirometer used is a Wazu respiration meter which is capable of continuous and on-line measuring the oxygen uptake rate. The method was applied to a completely mixed continuous-flow pilot plant which was fed with domestic wastewater. The results show a varying STOD with significant peaks at about noon, indicating higher concentrations of readily biodegradable compounds. The STOD of the examined wastewater appears to be mainly caused by ammonia being oxidized by nitrifiers.

Determination of allostatic load dynamics in the assessment of adaptation in temporary workers in the Arctic

2020 ◽  
pp. 547-548
Author(s):  
O. Yu. Atkov ◽  
S. G. Gorokhova
Keyword(s):  
Body Mass Index ◽  
Glucose Level ◽  
Shift Work ◽  
Allostatic Load ◽  
The Arctic ◽  
Temporary Workers ◽  
Short Term ◽  
Short Term Adaptation ◽  
The Individual

The individual dynamics of the allostatic load index was revealed mainly due to changes in the glucose level, body mass index, which makes it applicable for assessing the short-term adaptation to the stay in the conditions of shift work

Sign in / Sign up

Export Citation Format

Share Document