scholarly journals Experimental Study on Phosphorus-Containing Waste Water Treatment by Modified Fly Ash

2016 ◽  
Vol 04 (03) ◽  
pp. 80-84
Author(s):  
樊鑫 秦
Keyword(s):  
Waste Water ◽  
Experimental Study ◽  
Fly Ash ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Phosphorus Containing ◽  
Modified Fly Ash

Study on the Treatment of Phosphate-Containing Waste Water by Modified Fly Ash

2012 ◽  
Vol 534 ◽  
pp. 328-332
Author(s):  
Juan Juan Song
Keyword(s):  
Waste Water ◽  
Sulfuric Acid ◽  
Fly Ash ◽  
Ph Value ◽  
Adsorption Efficiency ◽  
Drying Time ◽  
Phosphorus Containing ◽  
Concentrated Sulfuric Acid ◽  
The Impact ◽  
Modified Fly Ash

In this study, fly ash was modified by concentrated sulfuric acid, and it was used in the treatment of phosphorus-containing wastewater, then we have investigated the impact of the different modification conditions on the adsorption, the results show that: in the condition of 5g of fly ash by adding 0.15 mL of concentrated sulfuric acid and 3 mL water, 1.5 h of drying time, the temperature of 100°C, the effect of removaling Phosphorus is the best,and the adsorption efficiency can reach 94.6%. The adsorption rate was fast, and the adsorption can react in condition of wide pH value.

Elaboration of new ceramic microfiltration membranes from mineral coal fly ash applied to waste water treatment

2009 ◽  
Vol 172 (1) ◽  
pp. 152-158 ◽  
Author(s):  
Ilyes Jedidi ◽  
Sami Saïdi ◽  
Sabeur Khemakhem ◽  
André Larbot ◽  
Najwa Elloumi-Ammar ◽  
...  
Keyword(s):  
Waste Water ◽  
Fly Ash ◽  
Water Treatment ◽  
Coal Fly Ash ◽  
Waste Water Treatment ◽  
Microfiltration Membranes

Recent Development of Membrane Processes for Water and Waste Water Treatment

1993 ◽  
Vol 27 (10) ◽  
pp. 141-149 ◽  
Author(s):  
R. Ben Aim ◽  
M. G. Liu ◽  
S. Vigneswaran
Keyword(s):  
Waste Water ◽  
Experimental Study ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Operating Conditions ◽  
Water Disinfection ◽  
Simultaneous Optimization ◽  
Membrane Processes ◽  
The Relationship

Membranes are presently used at industrial scale for water and waste water treatment, but still for limited production. More knowledge of hydrodynamic phenomena has recently resulted in significant technical improvements (backflush, unsteady flow). However an experimental study performed at lab scale in a rotating membrane device has shown the complexity of the relationship between operating conditions, rejection and filtrate flux. The need for bettering the quality of the water (low turbidity) and waster water (disinfection) may be in favour of the development of membrane processes if efficient models allowing simultaneous optimization of quality and productivity are made available (as was done years ago for deep bed filtration).

Conversion of Coal Fly Ash Into Zeolite 4A and Its Applications in Waste Water Treatment and Greenhouse Gas Reduction

2007 ◽  
Author(s):  
K. S. Hui ◽  
Christopher Y. H. Chao
Keyword(s):  
Waste Water ◽  
Fly Ash ◽  
Water Treatment ◽  
Coal Fly Ash ◽  
Waste Water Treatment ◽  
Methane Combustion ◽  
Sorption Data ◽  
Fuel Concentration ◽  
Conversion Method ◽  
Zeolite 4A

This study applied a novel conversion method to convert coal fly ash (CFA) into pure form (without mixture of CFA residue), single phase and high crystalline zeolite 4A. This novel conversion method allows a reduction by half of the total conversion time while maintaining a high degree of crystallinity of zeolite 4A which exists in a narrower particle size distribution. Applications of the CFA converted zeolite 4A (C4A) in waste water treatment of multi-heavy-metal-ions and in catalytic methane combustion were evaluated. In waste water treatment, for C4A and commercial zeolite 4A, the equilibrium sorption data were well fitted by the Langmuir model and showed the affinity order: Cu2+ > Cr3+ > Zn2+ > Co2+ > Ni2+. Compared to commercial zeolite 4A, the C4A and the treated CFA residue (TCFAR) were effective in removing multi-heavy-ions in water and could be an alternative material for treatment of wastewater. In catalytic methane combustion, post-treatment of C4A was performed to enhance catalytic activity of the catalyst. Catalytic methane combustion was conducted at atmospheric pressure and gas hourly space velocity (GHSV) between 3230 and 16150 h−1 under different lean fuel concentrations (equivalence ratio of 0.1–0.4) at 500 °C. Thermogravimetry analysis (TGA) results showed the catalyst (M(250)-C4A) could be operated at a temperature of 700 °C without damage to the zeolite structure. At 500 °C, higher combustion efficiency was achieved by either reducing the GHSV under the same fuel concentration or reducing the fuel concentration under the same GHSV. Comparing to a commercial catalyst 2%Pd/Al2O3, the catalyst (M(250)-C4A) achieved a higher methane conversion % in the GHSV range of 3230–9690 h−1. Finally, economic and environmental aspects of converting CFA to zeolite 4A were discussed.

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