scholarly journals Characterization of dye Industry Effluent and Assessment of Its Suitability for Irrigation Purpose

1970 ◽  
Vol 33 (1) ◽  
pp. 99-106 ◽  
Author(s):  
YN Jolly ◽  
A Islam ◽  
AI Mustafa
Keyword(s):  
Physicochemical Characteristics ◽  
Treated Effluent ◽  
Metal Contents ◽  
Sodium Percent ◽  
Treated Effluents ◽  
Academy Of Sciences ◽  
Industry Effluent ◽  
Dye Industry

A study was carried out to characterize dye industry effluent by measuring its various physicochemical characteristics and trace  heavy metals and to asses its quality to be used as an alternate means of irrigation.  As a case study the results obtained from the investigation of effluent of the Bangladesh Dyeing and Finishing Industries Ltd., Karnapara, Savar  are reported in this study. The direct effluent (untreated effluent) and  after it was treated in the laboratory (treated effluent) were investigated.  As groundwater is a part of the effluent, it was also analysed. The average pH  values of the untreated and treated effluents were found to be 7.83 and 5.13, respectively.  The EC values of the untreated effluent (1.81mS cm-1) and treated effluent (2.01 mS cm-1) were found to be higher than that of groundwater (0.93 mS cm-1). No significant variation in pH and EC values of monthly collected effluent samples was observed. The average concentrations of trace elements except Fe were found to be lower than their DoE recommended values for irrigation land. The concentrations of Na and K in the untreated effluent were found to be higher and the Ca and Mg concentrations  lower than those of the  treated effluents. Assessment of the untreated and treated effluent was made based on their EC, the sodium adsorption ratio (SAR) and soluble sodium percent (SSP), COD  and heavy trace metal contents. From the overall assessment, the treated effluent was found to be  suitable for irrigation. DOI: 10.3329/jbas.v33i1.2954 Journal of Bangladesh Academy of Sciences, Vol. 33, No. 1, 99-106, 2009

scholarly journals Physicochemical Characteristics of Fertilizer Industry Effluent and its Toxicological Impact on the Activity of Acetylcholinesterase (AChE) in Freshwater Teleosts Heteropneustes fossilis and Labeo rohita

2019 ◽  
Vol 77 (2) ◽  
pp. 77-86 ◽  
Author(s):  
Upma Singh ◽  
Rishikesh K. Tiwari ◽  
Ravi S. Pandey
Keyword(s):  
Ache Activity ◽  
Industrial Revolution ◽  
Labeo Rohita ◽  
Industrial Effluents ◽  
Physicochemical Characteristics ◽  
Heteropneustes Fossilis ◽  
Fertilizer Industry ◽  
Treated Effluent ◽  
Molecular Aspects ◽  
Industry Effluent

Abstract Industrial revolution is a good indicator of economic development of a country; however, it can be a threat to the flora and fauna if the untreated effluent of an industry is discharged. The present study is aimed to assess the comparative toxicological impacts of treated and untreated industrial effluents on acetylcholinesterase (AChE) activity in Heteropneustes fossilis and Labeo rohita, the most common edible fishes having diverse characters which include differences in morphology, habitat, food and feeding, etc. The physico-chemical parameters such as pH, electrical conductivity (EC), alkalinity, hardness, dissolved oxygen (DO), phosphate, sulphate, nitrate, free ammonia, chloride, zinc, iron, chromium and potassium of both untreated and treated effluent from the fertilizer industry were also analyzed as these parameters were not in range as per ISO guidelines. The LC50 value for untreated effluent was 2.34% (v/v) and 0.80% (v/v) for 96 h in H. fossilis and L. rohita, respectively, while no mortality was recorded in the treated effluent. The AChE activity in both fish species was found to decline in metabolically responsive organs like brain, muscle and gills through exposure to sub-lethal concentrations (1/15th, 1/10th and 1/5th of LC50 value) of the untreated effluent for 96 h. Further studies on biochemical and molecular aspects may reveal the mechanism of their action.

A case study on pulp and paper industry effluent treatment

2021 ◽  
pp. 107-117
Author(s):  
Supriya Singh ◽  
Manoj K. Tiwari
Keyword(s):  
Management Practices ◽  
Industrial Effluent ◽  
Treatment Plant ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Effluent Treatment ◽  
Treated Effluent ◽  
Pulp And Paper Industries ◽  
Industry Effluent

Industrial effluent Management is one of the major environmental concerns, especially in developing countries under rapid industrialization. The grossly polluting industries recognized by Central Pollution Control Board (CPCB), such as Pulp and Paper Industries, poses even bigger environmental threats, owing to quantity and quality of effluent generated. This paper aimed at analyzing effluent management practices in pulp and paper industries in India, and asses the performance variability of a paper mill effluent treatment plant (ETP), as a Case Study. Majority of pulp and paper industries found to still employ conventional methods of effluent treatment. Although, most of the parameters of treated effluent are commonly reported within CPCB’s permissible discharge limits, the treatment is usually cost and energy intensive, and produce high amount of solid residuals as sludge. For the case study paper mill ETP, the treatment efficiencies of the ETP units were analyzed under variable inlet pH, TSS, TDS, BOD and COD loads. The pH variations in the range of 6.5 to 9 had little effect of COD or TSS removal, however removal efficiencies were higher for larger inlet COD or TSS loads. The results of the study could be helpful in optimizing operation of the existing ETPs, as well as, guiding on upgrading ETPs with more cost-effective and efficient units.

Construction of plastic contact deformation maps on ceramics: a case study on aluminum nitride

1996 ◽  
Vol 54 ◽  
pp. 636-637
Author(s):  
D. L. Callahan
Keyword(s):  
Plastic Deformation ◽  
Aluminum Nitride ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Bright Field Image ◽  
Perfectly Plastic ◽  
Contrast Analysis ◽  
Deformation Patterns

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.

Integrating The Geophysical Characterization Of Seismic Thin Beds With Stochastic Reservoir Modeling: A Case Study From The Kutei Basin (Offshore Kalimantan, Indonesia)

2011 ◽  
Author(s):  
Giorgio Rocco Cavanna ◽  
Ernesto Caselgrandi ◽  
Elisa Corti ◽  
Alessandro Amato del Monte ◽  
Massimo Fervari ◽  
...  
Keyword(s):  
Reservoir Modeling ◽  
Geophysical Characterization

Failure Analysis of CDM-ESD Damage in a GaAs RFIC

2000 ◽  
Author(s):  
Amy Poe ◽  
Steve Brockett ◽  
Tony Rubalcava
Keyword(s):  
Radio Frequency ◽  
Failure Analysis ◽  
Integrated Circuit ◽  
Production Test ◽  
Analysis Techniques ◽  
Device Model ◽  
Charged Device ◽  
Subsequent Failure

Abstract The intent of this work is to demonstrate the importance of charged device model (CDM) ESD testing and characterization by presenting a case study of a situation in which CDM testing proved invaluable in establishing the reliability of a GaAs radio frequency integrated circuit (RFIC). The problem originated when a sample of passing devices was retested to the final production test. Nine of the 200 sampled devices failed the retest, thus placing the reliability of all of the devices in question. The subsequent failure analysis indicated that the devices failed due to a short on one of two capacitors, bringing into question the reliability of the dielectric. Previous ESD characterization of the part had shown that a certain resistor was likely to fail at thresholds well below the level at which any capacitors were damaged. This paper will discuss the failure analysis techniques which were used and the testing performed to verify the failures were actually due to ESD, and not caused by weak capacitors.

dC/dV and CV Characterization of Gate Resistance Defects in eDRAM Circuits

2013 ◽  
Author(s):  
Sweta Pendyala ◽  
Dave Albert ◽  
Katherine Hawkins ◽  
Michael Tenney
Keyword(s):  
Deep Submicron ◽  
Work Flow ◽  
Localization Technique ◽  
Characterization Techniques ◽  
Capacitance Voltage ◽  
Gate Resistance

Abstract Resistive gate defects are unusual and difficult to detect with conventional techniques [1] especially on advanced devices manufactured with deep submicron SOI technologies. An advanced localization technique such as Scanning Capacitance Imaging is essential for localizing these defects, which can be followed by DC probing, dC/dV, CV (Capacitance-Voltage) measurements to completely characterize the defect. This paper presents a case study demonstrating this work flow of characterization techniques.

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