Kinetics of sugar mill wastewater treatment by down-flow anaerobic fixed bed reactors

1996 ◽  
Vol 14 (3) ◽  
pp. 145-150 ◽  
Author(s):  
E. S�nchez ◽  
R. Borja ◽  
L. Travieso
Keyword(s):  
Wastewater Treatment ◽  
Fixed Bed ◽  
Sugar Mill ◽  
Fixed Bed Reactors ◽  
Kinetics Of

scholarly journals Hydrogen Storage in Propane-Hydrate: Theoretical and Experimental Study

2020 ◽  
Vol 10 (24) ◽  
pp. 8962
Author(s):  
Mohammad Reza Ghaani ◽  
Satoshi Takeya ◽  
Niall J. English
Keyword(s):  
Hydrogen Storage ◽  
Storage Capacity ◽  
Fixed Bed ◽  
Hydrogen Uptake ◽  
Hydrogen Release ◽  
Fixed Bed Reactor ◽  
Gas Dispersion ◽  
Fixed Bed Reactors ◽  
Non Equilibrium Molecular Dynamics ◽  
Kinetics Of

There have been studies on gas-phase promoter facilitation of H2-containing clathrates. In the present study, non-equilibrium molecular dynamics (NEMD) simulations were conducted to analyse hydrogen release and uptake from/into propane planar clathrate surfaces at 180–273 K. The kinetics of the formation of propane hydrate as the host for hydrogen as well as hydrogen uptake into this framework was investigated experimentally using a fixed-bed reactor. The experimental hydrogen storage capacity propane hydrate was found to be around 1.04 wt% in compare with the theoretical expected 1.13 wt% storage capacity of propane hydrate. As a result, we advocate some limitation of gas-dispersion (fixed-bed) reactors such as the possibility of having un-reacted water as well as limited diffusion of hydrogen in the bulk hydrate.

Kinetics of thermophilic anaerobes in fixed-bed reactors

Chemosphere ◽  
2001 ◽  
Vol 44 (5) ◽  
pp. 1201-1211 ◽  
Author(s):  
M. Perez ◽  
L.I. Romero ◽  
D. Sales
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactors ◽  
Kinetics Of

scholarly journals Cassava Wastewater Treatment in Fixed-Bed Reactors: Organic Matter Removal and Biogas Production

2019 ◽  
Vol 3 ◽  
Author(s):  
Elisangela Watthier ◽  
Cristiane L. Andreani ◽  
Douglas G. B. Torres ◽  
Osvaldo Kuczman ◽  
Maria H. F. Tavares ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Biogas Production ◽  
Fixed Bed ◽  
Organic Matter Removal ◽  
Fixed Bed Reactors ◽  
Cassava Wastewater

Study on Coking Wastewater Treatment by Fixed Bed of Metallization Pellets with High Carbon

2011 ◽  
Vol 356-360 ◽  
pp. 1942-1946 ◽  
Author(s):  
Wu Feng Jiang ◽  
Su Ju Hao ◽  
Yun Han Ling
Keyword(s):  
Wastewater Treatment ◽  
Degradation Rate ◽  
Fixed Bed ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Coking Wastewater ◽  
High Carbon ◽  
Fixed Bed Reactors ◽  
Ft Ir ◽  
Degradation Effect

Coking wastewater produced in the coking process is poisonous and difficult to be degraded. Coking wastewater was treated by fixed bed reactors of metallization pellets with high carbon (MPHC). In this paper, it studies the effect of removing phenols, cyanide, chemical oxygen demand（COD）and ammonia nitrogen in coking wastewater by MPHC. The results show that MPHC has good degradation effect on phenols and cyanide in coking wastewater, and the degradation rate reaches to 99.88% and 99.81% respectively; and has certain degradation effect on COD, the degradation rate is 70.61%; has poor degradation effect on ammonia nitrogen. The results of FT-IR indicate that the degradation of organic pollutants in coking wastewater by MPHC is not simply adsorption, but is removed completely.

Anaerobic treatment of sugar-mill wastewater in downflow fixed-bed reactors

1994 ◽  
Vol 48 (2) ◽  
pp. 179-181 ◽  
Author(s):  
E.P. Sánchez Hernández ◽  
L. Travieso Córdoba
Keyword(s):  
Fixed Bed ◽  
Anaerobic Treatment ◽  
Sugar Mill ◽  
Fixed Bed Reactors

Tertiary Nitrification Pilot Plants on Parisian Waste Water

1990 ◽  
Vol 22 (1-2) ◽  
pp. 347-352 ◽  
Author(s):  
C. Paffoni ◽  
B. Védry ◽  
M. Gousailles
Keyword(s):  
Waste Water ◽  
Metropolitan Area ◽  
Fixed Bed ◽  
Point Of View ◽  
Operating Conditions ◽  
Research Center ◽  
Daily Output ◽  
Practical Point ◽  
Fixed Bed Reactors

The Paris Metropolitan area, which contains over eight million inhabitants, has a daily output of about 3 M cu.meters of wastewater, the purification of which is achieved by SIAAP (Paris Metropolitan Area Sewage Service) in both Achères and Valenton plants. The carbon pollution is eliminated from over 2 M cu.m/day at Achères. In order to improve the quality of output water, its tertiary nitrification in fixed-bed reactors has been contemplated. The BIOFOR (Degremont) and BIOCARBONE (OTV) processes could be tested in semi-industrial pilot reactors at the CRITER research center of SIAAP. At a reference temperature of 13°C, the removed load is approximately 0.5 kg N NH4/m3.day. From a practical point of view, it may be asserted that in such operating conditions as should be at the Achères plant, one cubic meter of filter can handle the tertiary nitification of one cubic meter of purified water per hour at an effluent temperature of 13°C.

Biofilm Structure – An Important and Neglected Parameter in Waste Water Treatment

1989 ◽  
Vol 21 (8-9) ◽  
pp. 805-814 ◽  
Author(s):  
F. R. Christensen ◽  
G. Holm Kristensen ◽  
J. la Cour Jansen
Keyword(s):  
Wastewater Treatment ◽  
Structural Changes ◽  
Waste Water Treatment ◽  
Experimental Investigations ◽  
Biofilm Reactors ◽  
Substrate Removal ◽  
Treatment Processes ◽  
Laboratory Reactor ◽  
Biofilm Structure ◽  
Kinetics Of

Experimental investigations on the kinetics of wastewater treatment processes in biofilms were performed in a laboratory reactor. Parallel with the kinetic experiments, the influence of the biofilm kinetics on the biofilm structure was studied at macroscopic and microscopic levels. The close interrelationship between biofilm kinetics and structural changes caused by the kinetics is illustrated by several examples. From the study, it is evident that the traditional modelling of wastewater treatment processes in biofilm reactors based on substrate removal kinetics alone will fail in many cases, due to the inevitable changes in the biofilm structure not taken into consideration. Therefore design rules for substrate removal in biofilms used for wastewater treatment must include correlations between the removal kinetics and the structure and development of the biological film.

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