scholarly journals Helminth Egg Removal Capacity of UASB Reactors under Subtropical Conditions

Water ◽  
2015 ◽  
Vol 7 (12) ◽  
pp. 2402-2421 ◽  
Author(s):  
Rosa-Elena Yaya-Beas ◽  
Christian Ayala-Limaylla ◽  
Katarzyna Kujawa-Roeleveld ◽  
Jules van Lier ◽  
Grietje Zeeman
Keyword(s):  
Removal Capacity ◽  
Egg Removal ◽  
Uasb Reactors

scholarly journals Yaya-Beas, R.-E., et al. Helminth Egg Removal Capacity of UASB Reactors under Subtropical Conditions. Water 2015, 7, 2402–2421

Water ◽  
2015 ◽  
Vol 7 (9) ◽  
pp. 5152-5154
Author(s):  
Rosa-Elena Yaya-Beas ◽  
Christian Ayala-Limaylla ◽  
Katarzyna Kujawa-Roeleveld ◽  
Jules van Lier ◽  
Grietje Zeeman
Keyword(s):  
Removal Capacity ◽  
Egg Removal ◽  
Uasb Reactors

Improvement of the properties of granular sludge in UASB reactors by flow pulsation

2003 ◽  
Vol 48 (6) ◽  
pp. 51-56 ◽  
Author(s):  
A. Franco ◽  
E. Roca ◽  
J.M. Lema
Keyword(s):  
Specific Activity ◽  
Granular Sludge ◽  
Organic Loading ◽  
Flow Pulsation ◽  
High Increase ◽  
Loading Rates ◽  
Removal Capacity ◽  
Through Flow ◽  
Pulsing Flow ◽  
Uasb Reactors

The objective of this work is to improve the characteristics of granular sludge by modification of the hydraulics of the bed through flow pulsation. Three UASB reactors, two operated with pulsing flow (P1 and P2) and a third without pulsation (NP), were started-up. Both recycling and feeding flow were pulsed in the reactor P1, while in reactor P2, only the feeding was pulsed. A high increase in the removal capacity and stability were achieved by applying pulsation in reactors P1 and P2 when compared to the non-pulsed one. Besides, pulsation promotes the formation of particles of smaller size and higher porosity, thus increasing the specific surface of the bed and consequently, the specific activity. In fact, while reactors P1 and P2 had a 95% COD removal when working at high organic loading rates (12 kg COD/m3·d), reactor NP only reached 6 kg COD/m3·d with 85% of removal capacity.

DYE REMOVAL CAPACITY OF GRAPHENE OXIDE-IRON NANO PARTICLE COMPOSITE AS AN ADSORBENT

2018 ◽  
Author(s):  
Jyoti N. Thakre Sanjay R. Thakre P.T.Kosankar Kavita Gour Jyoti N. Thakre Sanjay R. Thakre P.T.Kosankar Kavita Gour ◽  
Keyword(s):  
Graphene Oxide ◽  
Dye Removal ◽  
Nano Particle ◽  
Particle Composite ◽  
Removal Capacity

Microbiological Performance of Multi-Stage Stabilization Ponds for Effluent Use in Agriculture

1991 ◽  
Vol 23 (7-9) ◽  
pp. 1517-1524 ◽  
Author(s):  
M. M. Saqqar ◽  
M. B. Pescod
Keyword(s):  
Environmental Parameters ◽  
Complete Removal ◽  
Faecal Coliform ◽  
Winter Period ◽  
Intestinal Nematode ◽  
Stabilization Ponds ◽  
Multi Stage ◽  
Guideline Value ◽  
Temperature Dependent Model ◽  
Egg Removal

The paper presents data on total and faecal coliform removal and on intestinal nematode egg removal achieved in the Al-Samra stabilization ponds in Jordan during the winter period December 1986 to March 1987. A total retention of 34 days in the series of 10 ponds was able to achieve complete removal of nematode eggs at the pond temperature 12-15°C but was not able to meet the WHO guideline value for faecal conforms of ≤ 1000/100 ml. In addition to retention time having a positive effect on faecal conform die-off, it was shown that surface organic loading, pond pH, BOD5 concentration, and depth, influenced the rate of faecal coliform die-off. It became apparent that interactions existed among the operational and environmental parameters but that the simple time-and-temperature-dependent model for faecal conform die-off was no longer appropriate.

Modelling of experiments with colloidal organic matter in biofilm reactors

1994 ◽  
Vol 29 (10-11) ◽  
pp. 479-486 ◽  
Author(s):  
T. A. Larsen ◽  
P. Harremoës
Keyword(s):  
Mathematical Model ◽  
Organic Matter ◽  
Bulk Liquid ◽  
Native Starch ◽  
Trickling Filters ◽  
Biofilm Reactors ◽  
Removal Capacity

A mathematical model for the degradation of colloidal organic matter in biofilm reactors has been developed. Contradictory to existing theories, the model includes bulk liquid hydrolysis as the first important step in the degradation sequence. This leads to unexpected effects of different reactor configurations. The model was successfully verified with native starch as a model substrate. Observed differences in colloid removal capacity between trickling filters and RBC-reactors are well explained by the model.

The effect of extreme temperatures (70–80°C) on the effluent quality and sludge characteristics of UASB reactors

1997 ◽  
Vol 36 (6-7) ◽  
pp. 325-332 ◽  
Author(s):  
Raghida Lepistö ◽  
Jukka Rintala
Keyword(s):  
Volatile Fatty Acids ◽  
Granular Sludge ◽  
Anaerobic Sludge ◽  
Methanogenic Activity ◽  
Sludge Characteristics ◽  
Effluent Quality ◽  
Start Up ◽  
Thermomechanical Pulping ◽  
Increasing Temperature ◽  
Uasb Reactors

The study focused on the effluent quality and sludge characteristics during the start-up and operation of extreme thermophilic (70 to 80°C) upflow anaerobic sludge bed (UASB) reactors, inoculated with mesophilic and thermophilic granular sludge and fed with acetate, volatile fatty acids (VFA), and thermomechanical pulping (TMP) whitewater. Low effluent quality and long start-up periods were observed during the start-up of the 70 to 76°C, VFA-fed UASB reactors inoculated with mesophilic granulae, while better effluent quality and considerably shorter start-up periods were observed when thermophilic (55/70°C) inocula were used. With VFA feed, a significant amount of acetate was removed at 70°C and even at 80°C, while propionate removal was negligible. With TMP whitewater feed, low VFA effluent concentration was obtained at 70°C. The volatile solids (VS) and the VS/total solids (TS) content of the sludge decreased significantly during the first 2–3 months of operation when mesophilic inocula were used. The initial specific methanogenic activity (ISMA) of the extreme thermophilic sludge decreased with increasing temperature and was slightly higher on glucose than on acetate. At 70 to 80°C, various rod-like bacteria were dispersed through the granulae in either individual or in low density micro colonies surrounded with a varying degree of precipitates.

Impact of UASB reactors operation mode on the removal of estrone and 17α-ethinylestradiol from wastewaters

2021 ◽  
Vol 764 ◽  
pp. 144291
Author(s):  
Vitória L. Louros ◽  
Diana L.D. Lima ◽  
Jorge H. Leitão ◽  
Valdemar I. Esteves ◽  
Helena G.A. Nadais
Keyword(s):  
Operation Mode ◽  
Uasb Reactors

Conventional Anaerobic Reactors Applied to Denitrification: a Comparison Between Packed Bed and UASB Reactors Under Low COD Conditions

2021 ◽  
Vol 232 (2) ◽  
Author(s):  
Natalia Cangussu Duarte ◽  
Ariane Corrêa Barbosa ◽  
Taína Martins Magalhães ◽  
Cassiana Carolina Montagner ◽  
Luana Mattos de Oliveira Cruz ◽  
...  
Keyword(s):  
Packed Bed ◽  
Anaerobic Reactors ◽  
Uasb Reactors

scholarly journals Optimal hot metal desulphurisation slag considering iron loss and sulphur removal capacity part I: fundamentals

2021 ◽  
pp. 1-13
Author(s):  
Frank N. H. Schrama ◽  
Elisabeth M. Beunder ◽  
Sourav K. Panda ◽  
Hessel-Jan Visser ◽  
Elmira Moosavi-Khoonsari ◽  
...  
Keyword(s):  
Iron Loss ◽  
Hot Metal ◽  
Removal Capacity ◽  
Sulphur Removal
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