Impacts of bioreactor operating parameters on removal efficiency, biodegradation rate, molecular distribution, and toxicity of commercial naphthenic acids

2021 ◽  
Author(s):  
Hamid Zanjani ◽  
Jafar Soltan ◽  
Mehdi Nemati
Keyword(s):  
Removal Efficiency ◽  
Naphthenic Acids ◽  
Operating Parameters ◽  
Biodegradation Rate ◽  
Molecular Distribution

Research on the Removal Results of Hydrogen Sulfide of the Treatment of Coal Gasification Wastewater Biogas in the Anaerobic Biotrickling Filter

2012 ◽  
Vol 610-613 ◽  
pp. 2000-2005
Author(s):  
Chun Yan Xu ◽  
Hong Jun Han
Keyword(s):  
Hydrogen Sulfide ◽  
Removal Efficiency ◽  
Flow Rate ◽  
Retention Time ◽  
Operating Parameters ◽  
Inlet Flow ◽  
H2s Removal ◽  
Outlet Concentration ◽  
Volume Load ◽  
Inlet Flow Rate

The uncertainty of operating parameters hinders the practical application of the biological desulfurization. To solve this problem, this study which was conducted in room temperature, pH around seven conditions, investigated the effects of the operating parameters on the hydrogen sulfide (H2S) removal performance in the biotrickling filter, including inlet H2S concentration, inlet flow rate or gas retention time, inlet volume load and circulating liquid spraying flux. The results showed that, the inlet H2S concentration should be controlled within 800mg/m3, 650mg/m3, 400mg/m3, 300mg/m3 respectively while the inlet flow rate was 150L/h, 200L/h, 250L/h, 300L/h, at those conditions, the outlet H2S concentrations were lower than 8mg/m3 and the H2S removal efficiencies were more than 98%. The optimum gas retention time was 12.37s, corresponding to the inlet flow rate of 200L/h, at this time, even if the inlet H2S concentration as high as 700mg/m3, the removal efficiency could be still more than 98%, the outlet concentration of H2S was only 13.1mg/m3. The maximum inlet volume load was 130g/(m3•h), in this condition, the outlet concentration of H2S could be controlled below 12mg/m3, the removal efficiency could above 98.4%.

The Effects of Operation Parameters on CO2 Removal Efficiency by Membrane Method

2014 ◽  
Vol 955-959 ◽  
pp. 2326-2329
Author(s):  
Fang Qin Li ◽  
Ji Yong Liu ◽  
Xiao Feng Zhang ◽  
Jian Xing Ren ◽  
Jiang Wu
Keyword(s):  
Removal Efficiency ◽  
Flue Gas ◽  
Gas Flow ◽  
Removal Rate ◽  
Absorption Efficiency ◽  
Flue Gases ◽  
Operating Parameters ◽  
Membrane Contactor ◽  
Solution Flow ◽  
Operation Parameters

On the membrane contactor test unit, chose monoethanolamine (MEA) as absorption solution to absorb CO2 of simulated flue gases, studied effects of operating parameters on CO2 capture. Operating parameters included initial CO2 contents in flue gas, flue gas flow and absorption solution flow. Experimental results showed that: the greater the absorption of fluid flow, the higher the CO2 removal rate;While the greater the flue gas flow or the higher the initial CO2 concentration in flue gas, the lower the CO2 removal rate. In order to study the influence of the regeneration solution on CO2 absorption efficiency, regeneration experiments were done. Since the loss of solvent in regeneration solution, CO2 removal efficiency by regeneration solution was lower than that by original absorption solution.

Removal of psychoactive pharmaceutical caffeine from water by electro-Fenton process using BDD anode: Effects of operating parameters on removal efficiency

2015 ◽  
Vol 156 ◽  
pp. 987-995 ◽  
Author(s):  
Oleksandra Ganzenko ◽  
Nihal Oturan ◽  
David Huguenot ◽  
Eric D. van Hullebusch ◽  
Giovanni Esposito ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Operating Parameters ◽  
Fenton Process ◽  
Bdd Anode

scholarly journals Removal of Cadmium from Industrial Wastewater using Electrocoagulation Process

2019 ◽  
Vol 26 (1) ◽  
pp. 24-34 ◽  
Author(s):  
Mohammed Alameen Salem ◽  
Najwa Majeed
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Applied Voltage ◽  
Industrial Wastewater ◽  
Batch Reactor ◽  
Operating Parameters ◽  
Initial Concentration ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes

Cadmium is one of the heavy metal found in the wastewater of many industries. The electrocoagulation offers many advantages for the removal of cadmium over other methods. So the removal of cadmium from wastewater by using electrocoagulation was studied to investigate the effect of operating parameters on the removal efficiency. The studied parameters were the initial pH, initial concentration, and applied voltage. The study experiments were conducted in a batch reactor with  with two pairs of aluminum electrodes with dimension  and 2mm in thick with 1.5 cm space between them. The optimum removal was obtained at pH =7, initial concentration = 50 mg/L, and applied voltage = 20 V and it was 90%.

scholarly journals Effect of pH and Electrolysis Time on Removal of Reactive Black B dye by Electrochemical Treatment

2018 ◽  
Vol 7 (1) ◽  
pp. 45-47
Author(s):  
S.Manikandan . ◽  
R.Saraswathi . ◽  
A.Mohammed Siraj Ansari .
Keyword(s):  
Removal Efficiency ◽  
Retention Time ◽  
Electrochemical Treatment ◽  
Color Removal ◽  
Operating Parameters ◽  
Experimental Setup ◽  
Electrolysis Time ◽  
Effective Technique ◽  
Batch Mode ◽  
Aluminum Electrodes

The electrochemical treatment was an effective technique in dye processing and it can be enforced to remove color from dye solution. An Experimental setup was made for electrochemical treatment of synthetically prepared Reactive Black B dye in batch mode operation using aluminum electrodes. Based on probability the operating parameters such as pH, Concentration, Electrolysis time, Retention time were determined from which the color removal efficiency (CRE) is optimized. The maximum color removal efficiency of Reactive black B dye was achieved at 98.23% for the concentration of 10mg/l.

Effect of alternating and direct current in an electrocoagulation process on the removal of cadmium from water

2012 ◽  
Vol 65 (2) ◽  
pp. 353-360 ◽  
Author(s):  
S. Vasudevan ◽  
J. Lakshmi
Keyword(s):  
Energy Consumption ◽  
Removal Efficiency ◽  
Direct Current ◽  
Current Density ◽  
Adsorption Process ◽  
Second Order ◽  
Operating Parameters ◽  
Electrocoagulation Process ◽  
A Current

The main objective of this study was to investigate the effects of AC and DC on the removal of cadmium from water using iron as anode and cathode. The various operating parameters on the removal efficiency of cadmium were investigated. The results showed that the optimum removal efficiency of 98.1 and 97.3% with the energy consumption of 0.734 and 1.413 kWh/kL was achieved at a current density of 0.2 A/dm2, at pH of 7.0 using AC and DC respectively. The adsorption process follows second order kinetics and the temperature studies showed that adsorption was endothermic and spontaneous in nature.

Study on Domestic Sewage Treatment with Rotating Biological Contactor

2012 ◽  
Vol 178-181 ◽  
pp. 376-379
Author(s):  
Fang Li ◽  
Zeng Lu Qi
Keyword(s):  
Removal Efficiency ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Operating Parameters ◽  
Good Prospect ◽  
Rotating Biological Contactor

This paper adopted a 3-stage rotating biological contactor (RBC), while the operating parameters could be controlled properly, this kind of RBC can obtain better removal effect in domestic sewage treatment. At 25oC, when hydraulic retention time (HRT) is 4h ,6h,8h,10h and 12h ,removal rate of COD is 65.14%,86.10%,89.82%,85.93% and 78.58%.HRT fixes on 8h, removal rate of NH3 –N is 75% after adjusting alkalinity. When rotating rate of RBC is 4,6,8,10,12 and 14 r/min, the removal rate of TN is 53.88%,56.78%,60.03%,58.49%,55.32% and 54.87%.RBC also has a good removal efficiency of TP and obtains the removal rate of TP 45%.There is good prospect in domestic sewage treatment with RBC.

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