Quantitative polymerase chain (QPCR) reaction using the MIMIC approach to estimate Cryptosporidium parvum oocysts, an intestinal pathogen, in municipal water treatment sludge samples

2000 ◽  
Vol 14 (2) ◽  
pp. 121-126 ◽  
Author(s):  
P Udeh ◽  
J Veenstra ◽  
AJ Abraham ◽  
GH John
Keyword(s):  
Water Treatment ◽  
Cryptosporidium Parvum ◽  
Water Treatment Sludge ◽  
Municipal Water ◽  
Intestinal Pathogen ◽  
Polymerase Chain ◽  
Cryptosporidium Parvum Oocysts ◽  
Mimic Approach

scholarly journals Effect of ultrasonic and thermal disintegration of water treatment sludge

2018 ◽  
Vol 44 ◽  
pp. 00045
Author(s):  
Justyna Górka ◽  
MaŁgorzata Cimochowicz-Rybicka ◽  
Beata Fryźlewicz-Kozak
Keyword(s):  
Water Treatment ◽  
Main Parameter ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water Treatment Sludge ◽  
Disintegration Process ◽  
Municipal Water ◽  
Ultrasound Intensity ◽  
Sludge Production

This research was conducted to evaluate the effects of thermal and ultrasound disintegration on the disintegration degree (DD) of water treatment sludge from a municipal water treatment plant. A disintegration process was used to (i) improve subsequent coagulation efficiencies and dewatering processes (ii) reduce sludge production, and (iii) obtain both economic and enviromental benefits. The results show that using the disintegration process has an influence on DD values. It is also worth emphasising that the main parameter determining the efficiency of ultrasonic and thermal disintegration was the time of the applied process. Other parameters such as ultrasound intensity and temperature had a reduced impact on DD values.

Construction materials wastes use to neutralize hazardous municipal water treatment sludge

2019 ◽  
Vol 204 ◽  
pp. 800-808 ◽  
Author(s):  
Vsévolod Mymrin ◽  
Fernanda M. Hackbart ◽  
Kirill Alekseev ◽  
Monica A. Avanci ◽  
Edgar Winter ◽  
...  
Keyword(s):  
Water Treatment ◽  
Construction Materials ◽  
Water Treatment Sludge ◽  
Municipal Water

scholarly journals Risk factors associated with the occurrence of Cryptosporidium parvum infection in calves

2010 ◽  
Vol 62 (6) ◽  
pp. 1325-1330 ◽  
Author(s):  
A.J Almeida ◽  
F.C.R Oliveira ◽  
V.M.Q Flores ◽  
C.W.G Lopes
Keyword(s):  
Risk Factors ◽  
Cryptosporidium Parvum ◽  
Dairy Calves ◽  
Chain Reaction ◽  
Factors Associated ◽  
Water Trough ◽  
Polymerase Chain ◽  
Cryptosporidium Parvum Oocysts ◽  
Statistical Risk ◽  
Janeiro State

Cryptosporidium parvum oocysts were detected in feces of dairy calves raised in Rio de Janeiro State and the risk factors involved in the infection were determined. A hundred calves aging up to 12-month-old from 13 dairy farms were sampled. Polymerase chain reaction was used to detect the presence of oocysts. The zoonotic C. parvum species was detected in 45% animals. Statistical risk factors analyses revealed an association between infection and animals raised in technical systems such as the use of milking equipment, milking cooler, and water trough(P<0.05)

scholarly journals Geotechnical properties of a municipal water treatment sludge incorporating a coagulant

2008 ◽  
Vol 45 (5) ◽  
pp. 715-725 ◽  
Author(s):  
Brendan C. O’Kelly
Keyword(s):  
Shear Strength ◽  
Water Treatment ◽  
Water Content ◽  
Geotechnical Properties ◽  
Strength Parameter ◽  
Compression Index ◽  
Water Treatment Sludge ◽  
Secondary Compression ◽  
Municipal Water ◽  
Density Values

The geotechnical properties of a municipal water treatment sludge from an upland catchment are presented. The gelatinous sludge comprised flocs of mainly quartz, manganoan calcite, and clay-sized organic solids, and incorporated an alum coagulant and an anionic polyelectrolyte. Standard Proctor compaction yielded low bulk density values of 0.95–1.10 t/m3 and dry density values of 0.12–0.36 t/m3 (water content is 160%–780%) in line with the low specific gravity of solids value of 1.86. The undrained shear strength and the water content were inversely related on a semi-log plot. The effective stress shear strength parameter values were c' = 0 and ϕ' = 39°. The consolidation properties were studied using the oedometer, consolidometer, and triaxial apparatus. The material was highly compressible with primary compression index (Cc) values of 2.5–3.7, and primary compression ratio (C*c) values of 0.20–0.28. The majority of the strain response occurred due to primary consolidation although the material had a very low permeability (coefficient of permeability values decreasing from 2 × 10−9 to 5 × 10−11 m/s for an effective vertical stress of σ'v = 3–800 kPa). Secondary compression was minor, with a mean secondary compression index (Cαe) value of 0.15, and Cαe/Cc = 0.04–0.06.

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