Toxicological Evaluation of Waste-Water Samples to Appropriately Sensitized Cultured Fathead Minnow Cells Compared with the Microtox Assay

2002 ◽  
Vol 68 (2) ◽  
pp. 253-260 ◽  
Author(s):  
C. Van der Wielen ◽  
E. M. Scheers ◽  
P. J. Dierickx
Keyword(s):  
Waste Water ◽  
Water Samples ◽  
Fathead Minnow ◽  
Toxicological Evaluation ◽  
Microtox Assay

Occurrence and Removal of Cryptosporidium spp. Oocysts and Giardia spp. Cysts in Kenyan Waste Stabilisation Ponds

1993 ◽  
Vol 27 (3-4) ◽  
pp. 97-104 ◽  
Author(s):  
A. M. Grimason ◽  
H. V. Smith ◽  
W. N. Thitai ◽  
P. G. Smith ◽  
M. H. Jackson ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Samples ◽  
Laboratory Experiments ◽  
Municipal Waste ◽  
Retention Period ◽  
Waste Stabilisation Ponds ◽  
Cryptosporidium Spp ◽  
Physico Chemical ◽  
Microbiological Parameters ◽  
Final Effluent

This study was designed to determine tlie occurrence and removal of Cryptosporidium spp. oocysts and Giardia spp. cysts, in municipal waste-water by waste stabilisation ponds in tlie Republic of Kenya. Eleven waste stabilisation pond systems located in towns across Kenya were included. A total of 66 waste-water samples were examined for the presence of oocysts and cysts, comprising 11 raw waste-water and 55 pond effluent samples over a two month period. Cryptosporidium spp. oocysts were detected in 6 and Giardia spp. cysts in 9 of the designated pond systems analysed demonstrating their ubiquitous nature throughout Kenya. Oocyst levels detected in raw waste-water samples ranged from 12.5 - 72.97 oocysts/l and various pond effluents between 2.25 - 50 oocysts/l. Cyst levels detected in raw waste-water samples ranged from 212.5 to 6212.5 cysts/l and in various pond effluents from 3.125 to 230.7 cysts/l. No Cryptosporidium spp. oocysts were detected in the final effluent from any pond systems studied (11/11). Whereas no Giardia spp. cysts were detected in the final effluent from 10 of 11 waste stabilisation pond systems studied, one pond system was found to be consistently discharging cysts in the final effluent at concentrations ranging from 40 to 50 cysts/l. The minimum retention period for the removal of Cryptosporidium spp. oocysts and Giardia spp. cysts was 37.3 days. Laboratory experiments were performed to assess physico-chemical and microbiological parameters to express relationships between pond performance and protozoa removal.

Speciation, Preconcentration and Determination of Inorganic Chromium Species in Spring, Drinking, and Waste Water Samples

2021 ◽  
Vol 43 (1) ◽  
pp. 46-52
Author(s):  
Burcu Kabak ◽  
Yasin Arslan ◽  
Diğdem Trak ◽  
Erdal Kendüzler
Keyword(s):  
Waste Water ◽  
Water Samples ◽  
Chromium Species

Speciation of phosphorus oxoacids in natural and waste water samples

2012 ◽  
Vol 1231 ◽  
pp. 16-21 ◽  
Author(s):  
Carme Valls-Cantenys ◽  
Mònica Iglesias ◽  
José Luís Todolí ◽  
Victòria Salvadó
Keyword(s):  
Waste Water ◽  
Water Samples

scholarly journals Environmental Pollution Around Dhaka EPZ and its Impact on Surface and Groundwater

1970 ◽  
Vol 46 (2) ◽  
pp. 153-162 ◽  
Author(s):  
MKA Khan ◽  
M Alam ◽  
MS Islam ◽  
MQ Hassan ◽  
MA Al-Mansur
Keyword(s):  
Waste Water ◽  
Water Samples ◽  
Industrial Effluent ◽  
Industrial Effluents ◽  
Industrial Sector ◽  
Background Concentration ◽  
Physical Parameters ◽  
Clay Layer ◽  
Surrounding Area ◽  
Surface And Groundwater

Industrial sector is gradually playing a more important role in Bangladesh economy and EPZs have provided a good platform of industrial establishment. Dhaka EPZ since its establishment has altered the fragile environment of the surrounding area. Huge amount of effluents discharged from Dhaka EPZ has been polluting the surface and groundwater. Surface water contamination by industrial effluents released from Dhaka Export Processing Zone (DEPZ) and the ramification to groundwater have been estimated. The study involves analyzing physicochemical properties along with major Anionic contaminants in waste water samples. Conversely their potential transmission into groundwater has been evaluated by analyzing HTW water samples from the surrounding area. Some important physical parameters were measured while collecting the sample in field condition. The suite of 6 major anions (F-, Cl-, NO2-, NO3-, SO4-2 and HCO3-) have been measured in ppm level of concentration by analyzing with chemically suppressed Ion Chromatograph while HCO3- content was determined by Titration method. Analysis reveals pH maximum 9.55, DO maximum 2.40 mg/L, TDS maximum 1280 mg/L, Bi-carbonate maximum 891 mg/L, Sulfate maximum 452 mg/L, Chloride maximum 179 mg/L, Nitrate maximum 44 mg/L and Fluoride not above detection limit. Higher concentration of Cl-, SO4-2, NO3- in waste water samples compared to the standard by DOE (Department of Environment) as well as background concentration from uncontaminated water can be correlated with industrial effluent discharge. On the other hand low level of concentration found in groundwater samples indicates that groundwater is still safe. This phenomenon is explained by the presence of impervious clay layer. Key words: Dhaka EPZ; Effluent; Madhupur Tract; Contaminants; DOE; Environment; Clay layer DOI: http://dx.doi.org/10.3329/bjsir.v46i2.8181 Bangladesh J. Sci. Ind. Res. 46(2), 153-162, 2011

Microbiological and Chemical Aspects on Some Fresh Water and Industrial Waste Water Samples

1999 ◽  
Vol 2 (3) ◽  
pp. 1017-1023 ◽  
Author(s):  
El-Fadaly H . ◽  
M. El-Defrawy . ◽  
F. El-Zawawy . ◽  
D. Makia .
Keyword(s):  
Waste Water ◽  
Fresh Water ◽  
Water Samples ◽  
Industrial Waste ◽  
Industrial Waste Water
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