scholarly journals Statistical evaluation of biochemical oxygen demand of river water

2018 ◽  
Vol 3 (4) ◽  
pp. 118-120
Author(s):  
Sourav Ghosh ◽  
Monit Paul ◽  
Anusree Raha ◽  
Prosenjit Mukherjee ◽  
Anindya Bagchi ◽  
...  
Keyword(s):  
River Water ◽  
Biochemical Oxygen Demand ◽  
Statistical Evaluation ◽  
Oxygen Demand

scholarly journals Experimenting biochemical oxygen demand decay rates of Malaysian river water in a laboratory flume

2017 ◽  
Vol 23 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Md. Nuruzzaman ◽  
Abdullah Al-Mamun ◽  
Md. Noor Bin Salleh
Keyword(s):  
River Water ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Decay Rates ◽  
Laboratory Flume

scholarly journals Estimation of Biochemical Oxygen Demand Based on Dissolved Organic Carbon, UV Absorption, and Fluorescence Measurements

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Jihyun Kwak ◽  
Bumju Khang ◽  
Eunhee Kim ◽  
Hyunook Kim
Keyword(s):  
Wastewater Treatment ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
River Water ◽  
Biochemical Oxygen Demand ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Fluorescence Measurements ◽  
Wwtp Effluent ◽  
Software Sensors

Determination of 5-d biochemical oxygen demand (BOD5) is the most commonly practiced test to assess the water quality of surface waters and the waste loading. However, BOD5is not a good parameter for the control of water or wastewater treatment processes because of its long test period. It is very difficult to produce consistent and reliable BOD5results without using careful laboratory quality control practices. This study was performed to develop software sensors to predict the BOD5of river water and wastewater. The software sensors were based on the multiple regression analysis using the dissolved organic carbon (DOC) concentration, UV light absorbance at 254 nm, and synchronous fluorescence spectra. River water samples and wastewater treatment plant (WWTP) effluents were collected at 1-hour interval to evaluate the feasibility of the software sensors. In short, the software sensors developed in this study could well predict the BOD5of river water (r=0.78) and for the WWTP effluent (r=0.90).

scholarly journals Regulation of Color, pH, and Biochemical Oxygen Demand of Asa River Water Using a Luffa cylindrica Biomass Packed Bed

2021 ◽  
Author(s):  
Joshua O. Ighalo ◽  
Omodele A. A. Eletta ◽  
Adewale George Adeniyi ◽  
Oluwapelumi Bashir Apooyin
Keyword(s):  
River Water ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Packed Bed ◽  
Luffa Cylindrica

scholarly journals The Effect of Sewage on Brown Trout {Salmo trutta L.)

1935 ◽  
Vol 12 (1) ◽  
pp. 1-12
Author(s):  
J. LONGWELL ◽  
F. T. K. PENTELOW
Keyword(s):  
Dissolved Oxygen ◽  
River Water ◽  
Biochemical Oxygen Demand ◽  
Salmo Trutta ◽  
River Flow ◽  
Harmful Effect ◽  
Oxygen Demand ◽  
Sewage Effluent ◽  
Toxic Substances ◽  
Anaerobic Conditions

Fresh undiluted sewage contains unstable substances which are directly toxic to fish. Sewage which has been kept for 1 or 2 days and stirred in an open tank at 18° C. is more toxic than fresh sewage, possibly owing to the production of other toxic substances. It has also been shown that the biochemical oxygen demand is directly proportional to the "strength" of the sewage which is closely related to toxicity. Consequently a large biochemical oxygen demand of fresh sewage indicates a certain degree of toxicity. It appears that when fresh sewage is discharged into a river in concentrations up to 10 per cent. of the river water, it has no directly toxic effect on fish. A river can purify a certain proportion of sewage effluent without becoming seriously deoxygenated. In one river with which we are acquainted a sewage effluent forms about 3.7 per cent. of the river flow at normal summer levels. The dissolved oxygen content of the river during the period it was under observation never fell below 60 per cent. of the saturation value, and such a mixture of sewage and water would have no directly injurious effect on fish. If, however, the proportion of sewage is increased, then the river will become more deoxygenated and eventually at a certain ratio of sewage to river water the toxicity will become more apparent, partly owing to the oxygen depletion. This condition is of course readily produced in a small river. The final stage will be attained when the quantity of sewage is sufficient to remove all the dissolved oxygen of the water. When there is a belt of deoxygenated water, sewage will decompose under anaerobic conditions and sulphide will be formed. As it has been shown that this substance is directly toxic to trout in small concentrations, 0.3 part per 100,000 being rapidly fatal, the fish are exposed to a definite poison as well as the danger of asphyxiation. In a slow-flowing river below a sewage works, mud is deposited on the river bed. Anaerobic conditions can exist in this mud although the supernatant water is fully oxygenated and any sulphate present may be reduced to sulphide which will be washed downstream when the river is in flood. It may therefore be concluded that in a river where there is a plentiful supply of oxygen, sewage in moderate quantity has no directly harmful effect on fish unless it is in a septic condition and contains sulphide. When sewage is discharged into a slowflowing river, mud banks will be formed which may have the necessary anaerobic conditions for the production of sulphide. These, during floods, may be harmful to fish before they are oxidised. There remains the possibility that, although the fish are not directly affected, their food and spawning grounds may suffer from the pollution. This possibility has not been overlooked, but the data on these points are not yet complete.

Investigating the Relationship Between Export Diversification and River Water Pollution: A Time Series Analysis of the Indian Experience

2021 ◽  
pp. 097674792110401
Author(s):  
Aisha Sheikh ◽  
Owais Ibni Hassan
Keyword(s):  
Water Pollution ◽  
River Water ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Industrial Clusters ◽  
Global Dynamics ◽  
Export Diversification ◽  
Electrical Machinery ◽  
Long Run ◽  
River Water Pollution

This article attempts to test the environmental Kuznets curve (EKC) for export diversification and river water pollution (proxied by biochemical oxygen demand) for India during the period from 1986 to 2019. Over the past decade, India’s merchandise exports have been dominated by pollution-intensive industries such as mineral fuels, pharmaceuticals, nuclear reactors, organic chemicals and electrical machinery, iron and steel, and textiles. Additionally, India’s export mix is weakly diversified or a small number of commodities form the merchandise export basket. River water pollution is one of the gravest ecological threats in this country. Although a host of reasons define this ecological devastation, this study attempts to investigate if the weakly diversified, pollution-intensive export basket has any link with biochemical oxygen demand. Dickey–Fuller (ADF) and Philip–Perron (PP) tests are employed to determine the stationary properties of the variables and the autoregressive distributed lag (ARDL) cointegration test, as well as the bounds test to check the short- and long-run cointegration. Findings suggest that (a) export diversification is strongly cointegrated with biochemical oxygen demand both in the short and in the long run, and (b) the conventional inverted U-shaped EKC was not validated. Furthermore, a weakly diversified export basket increases water pollution. Suggested policy initiatives to combat industrial water pollution include the introduction of economic instruments. The water pollution abatement experience of industrial clusters suggests that radical institutional and governance reforms are paramount for successful policy reforms. Finally, there is a need to reduce the export commodity basket concentration not just to insulate the economy against global dynamics but also for achieving the goal of sustainable development. JEL codes: F18, Q56, Q53. Q580

Peranan BOD biosensor untuk proses optimasi pengolahan limbah sintetik di SBR

2019 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Lindawati Lindawati
Keyword(s):  
Biochemical Oxygen Demand ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand

Sebuah Sequencing Batch Reactor (SBR) digunakan untuk mengevaluasi peranan Biochemical Oxygen Demand (BOD) biosensor dalam proses optimasi proses pengolahan nutrien karbon, nitrogen dan fosfat. Hasil penelitian menunjukkan bahwa BOD biosensor dapat dipergunakan untuk penentuan karbon organik, sehingga reduksi siklus SBR dapat dilakukan dan efisiensi proses meningkat. Pola konsumsi karbon organik ditemukan dengan adanya ‘tanda diam’ pada fase anoksik/ anaerobik, di mana dari tanda ini, fase aerobik dapat segera dimulai. Reduksi durasi siklus SBR dari 8 jam menjadi 4 jam meningkatkan efiesiensi pengolahan C, N dan P yang meningkat pula (hampir dua kali lebih tinggi).

Sign in / Sign up

Export Citation Format

Share Document