scholarly journals On-Site Total Phosphorus Removal From Wastewater

2021 ◽  
Author(s):  
Amanda L. Alaica
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Removal ◽  
Contact Time ◽  
Cost Effective ◽  
Chemical Adsorption ◽  
Media Composition ◽  
Solvent Concentration ◽  
Detention Time ◽  
Removal Capacity ◽  
Freundlich Adsorption Isotherm

Eutrophication is attributed to high phosphorus concentrations in our ecosystem, modifying water and habitat quality. As an industry-academia collaboration program, this thesis assists the development of Virtual Engineers’ (VE) technology of a cost-effective, efficient, and affordable on-site Total Phosphorus (TP) removal unit. By investigating the chemical adsorption of a clay-zeolite media, the objective was to demonstrate TP removal capacity; primarily focusing on pellet media composition and formation, influent concentration, contact time to overall removal efficiency. All stages of optimization analyses were conducted in a scaled-down testing unit based on a ¾ inch pellet diameter construction, for a modest 45 minute detention time, and achieved an optimized removal of approximately 45%. The final pellet selected was the non-conditioned VE design, at maximum furnace exposure, scaled up to a 1 inch diameter. Results showed that an equilibrium removal of 72% is achieved after a 3 hour contact time; supporting the research of Sun (2010) on the Freundlich Adsorption Isotherm linearization of solute adsorption to equilibrium solvent concentration.

scholarly journals On-Site Total Phosphorus Removal From Wastewater

2021 ◽  
Author(s):  
Amanda L. Alaica
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Removal ◽  
Contact Time ◽  
Cost Effective ◽  
Chemical Adsorption ◽  
Media Composition ◽  
Solvent Concentration ◽  
Detention Time ◽  
Removal Capacity ◽  
Freundlich Adsorption Isotherm

Eutrophication is attributed to high phosphorus concentrations in our ecosystem, modifying water and habitat quality. As an industry-academia collaboration program, this thesis assists the development of Virtual Engineers’ (VE) technology of a cost-effective, efficient, and affordable on-site Total Phosphorus (TP) removal unit. By investigating the chemical adsorption of a clay-zeolite media, the objective was to demonstrate TP removal capacity; primarily focusing on pellet media composition and formation, influent concentration, contact time to overall removal efficiency. All stages of optimization analyses were conducted in a scaled-down testing unit based on a ¾ inch pellet diameter construction, for a modest 45 minute detention time, and achieved an optimized removal of approximately 45%. The final pellet selected was the non-conditioned VE design, at maximum furnace exposure, scaled up to a 1 inch diameter. Results showed that an equilibrium removal of 72% is achieved after a 3 hour contact time; supporting the research of Sun (2010) on the Freundlich Adsorption Isotherm linearization of solute adsorption to equilibrium solvent concentration.

Removal of Total Phosphorus from Domestic Wastewater with Clay-Zeolite Medium

2013 ◽  
Vol 647 ◽  
pp. 753-757 ◽  
Author(s):  
Grace K. Luk
Keyword(s):  
Adsorption Isotherm ◽  
Removal Efficiency ◽  
Total Phosphorus ◽  
Contact Time ◽  
Domestic Wastewater ◽  
Scale Model ◽  
Isotherm Model ◽  
Chemical Adsorption ◽  
Solvent Concentration ◽  
Freundlich Adsorption Isotherm

Chemical adsorption of a clay-zeolite pellet medium is being investigated for the removal of total phosphorus from domestic wastewater. The effect of pellet composition, influent concentration, and contact time on the overall removal efficiency is being studied in a five-layer bench-scale model. Results showed that an equilibrium removal of 72% is achieved after a 3 hour contact time, supporting the Freundlich adsorption isotherm model based on the linearization of solute adsorption to equilibrium solvent concentration.

scholarly journals Exploiting the Potential in Water Cleanup from Metals and Nutrients of Desmodesmus sp. and Ampelodesmos mauritanicus

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1461
Author(s):  
Roberto Braglia ◽  
Lorenza Rugnini ◽  
Sara Malizia ◽  
Francesco Scuderi ◽  
Enrico Luigi Redi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Metal Removal ◽  
Anthropogenic Activities ◽  
Cost Effective ◽  
Single Species ◽  
Nitrogen And Phosphorus ◽  
Removal Rates ◽  
Sequential Approach ◽  
Removal Capacity ◽  
Green Microalga

Increasing levels of freshwater contaminants, mainly due to anthropogenic activities, have resulted in a great deal of interest in finding new eco-friendly, cost-effective and efficient methods for remediating polluted waters. The aim of this work was to assess the feasibility of using a green microalga Desmodesmus sp., a cyanobacterium Nostoc sp. and a hemicryptophyte Ampelodesmos mauritanicus to bioremediate a water polluted with an excess of nutrients (nitrogen and phosphorus) and heavy metals (copper and nickel). We immediately determined that Nostoc sp. was sensitive to metal toxicity, and thus Desmodesmus sp. was chosen for sequential tests with A. mauritanicus. First, A. mauritanicus plants were grown in the ‘polluted’ culture medium for seven days and were, then, substituted by Desmodesmus sp. for a further seven days (14 days in total). Heavy metals were shown to negatively affect both the growth rates and nutrient removal capacity. The sequential approach resulted in high metal removal rates in the single metal solutions up to 74% for Cu and 85% for Ni, while, in the bi-metal solutions, the removal rates were lower and showed a bias for Cu uptake. Single species controls showed better outcomes; however, further studies are necessary to investigate the behavior of new species.

scholarly journals Adsorption Study for Trifluralin on Iraqi ? –Alumina

2012 ◽  
Vol 9 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Adsorption Isotherm ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Adsorption Process ◽  
Kinetic Equations ◽  
Adsorption Study ◽  
Adsorption Capacities ◽  
Experimental Parameters ◽  
Freundlich Adsorption Isotherm ◽  
Equilibrium Adsorption Isotherm

Equilibrium adsorption isotherm for the removal of trifluralin from aqueous solutions using ? –alumina clay has been studied. The result shows that the isotherms were S3 according Giels classification. The effects of various experimental parameters such as contact time, adsorbent dosage, effect of pH and temperature of trifluralin on the adsorption capacities have been investigated. The adsorption isotherms were obtained by obeying freundlich adsorption isotherm with (R2 = 0.91249-0.8149). The thermodynamic parameters have been calculated by using the adsorption process at five different temperature, the values of ?H, ?G and ?S were (_1.0625) kj. mol-1, (7.628 - 7.831) kj.mol-1 and (_2.7966 - _2.9162) kg. k-1. mol-1 respectively. The kinetic study of adsorption process has been studied depending on three kinetic equations: 1- Allergen equation 2- Morris –weber eguation 3- Reichenberg eguation. In general, the result shows the isotherm were on ?- alumina according to Giels classification.? –alumina and thermodynamic

scholarly journals Novel Lanthanum Doped Magnetic Teff Straw Biochar Nanocomposite and Optimization Its Efficacy of Defluoridation of Groundwater Using RSM: A Case Study of Hawassa City, Ethiopia

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Temesgen Abeto Amibo ◽  
Surafel Mustafa Beyan ◽  
Tsegaye Markos Damite
Keyword(s):  
Rotational Speed ◽  
Ligand Exchange ◽  
Contact Time ◽  
Adsorption Process ◽  
Quadratic Model ◽  
Fluoride Removal ◽  
Fluoride Ions ◽  
Removal Capacity ◽  
Mathematical Process

The problem extent of the large concentration of fluoride ions in drinking water is still a central health issue. In the present study, lanthanum doped magnetic Teff straw biochar (LDMTSB) was developed as a novel adsorbent for removing fluoride ions in the groundwater in Rift-Valley regions, especially Hawassa city, Ethiopia. The synthesized LDMTBC was characterized via FTIR, XRD, SEM, and BET. And, this analysis proposed that multiadsorption techniques such as ligand exchange, precipitations, and electrostatic interaction could be evinced throughout the fluoride ions adsorption process by LDMTSB. The constraints that influence the adsorption efficacy, namely, a dosage of LDMTSB, contact time, pH of the solution, and rotational speed, were analyzed and optimized using the response surface methodology approach. Under the optimum situations, LDMTSB dosage: 3.97 g, contact time: 56.36 min, rotational speed: 591.19 rpm, and pH: 3.968 demonstrate high efficacy of LDMTSB with 98.89% fluoride removal capacity. Further, the quadratic model (R2 = 0.9841) was designated for governing the mathematical process. The LDMTSB was successful in the removal of fluoride ions in the groundwater. This study provides a valuable economical solution for the application of Teff straw.

Phosphorus and Nitrogen Removal from Sewage by Modified Honeycomb Cinder

2013 ◽  
Vol 726-731 ◽  
pp. 2931-2935
Author(s):  
Qi Bin Liang ◽  
Yun Gen Liu ◽  
Kun Tian
Keyword(s):  
Nitrogen Removal ◽  
Phosphorus Removal ◽  
Contact Time ◽  
Low Cost ◽  
Ammonia Nitrogen ◽  
Domestic Sewage ◽  
Operating Conditions ◽  
Optimal Conditions ◽  
Batch Experiments ◽  
Adsorption Capacities

The study aimed at phosphorus and nitrogen removal by honeycomb cinder modified with Zinc chloride (ZnCl2). By bench-scale batch experiments, honeycomb cinders with different modification time and ZnCl2 dosage were modified and its adsorption capacities were evaluated by methylence blue as the adsorbate. Under the optimal modification conditions, large amount modified honeycomb cinders were prepared to remove the phosphorus and nitrogen from domestic sewage, which different operating conditions of honeycomb cinders dosage, and contact time were considered. The results show that removal efficiencies of total phosphate (TP), orthophosphate (PO43-P), total nitrogen (TN) and ammonia nitrogen (NH4+-N) could reach 89.9%, 96.7%, 18.9% and 23.3% under the optimal conditions, respectively. Modified honeycomb cinders might be an effective and low cost adsorbent for phosphorus removal.

NOVEL TEST FOR TOTAL PHOSPHORUS REMOVAL OPTIMIZATION IN PRIMARY CLARIFIERS

2007 ◽  
Vol 2007 (2) ◽  
pp. 1556-1559
Author(s):  
Marija Peric ◽  
Rumana Riffat ◽  
Sudhir N. Murthy ◽  
Beverley Stinson ◽  
Alan Cassel ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Removal
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