Influence of Water Treatment Residuals on Phosphorus Solubility and Leaching

2002 ◽  
Vol 31 (4) ◽  
pp. 1362-1369 ◽  
Author(s):  
H.A. Elliott ◽  
G.A. O'Connor ◽  
P. Lu ◽  
S. Brinton
Keyword(s):  
Water Treatment ◽  
Water Treatment Residuals ◽  
Influence Of Water ◽  
Phosphorus Solubility

Influence of water treatment residuals on dewaterability of wastewater biosolids

2013 ◽  
Vol 67 (1) ◽  
pp. 180-186 ◽  
Author(s):  
Malcolm Taylor ◽  
Herschel A. Elliott
Keyword(s):  
Water Treatment ◽  
Filter Press ◽  
Mass Ratio ◽  
Water Treatment Residuals ◽  
Capillary Suction ◽  
Processing Equipment ◽  
Polymer Addition ◽  
Hydrous Oxides ◽  
Influence Of Water ◽  
Belt Filter Press

Co-dewatering of water treatment residuals (WTR) and wastewater biosolids can potentially benefit municipalities by reducing processing equipment and costs. This study investigated dewaterability (using capillary suction time, CST) of combined alum residuals (Al-WTR) and anaerobically digested biosolids at various blending ratios (BR), defined as the mass ratio of WTR to biosolids on a dry solids basis. Without polymer addition, the CST was 160 s for a BR of 0.75 compared with 355 s for the biosolids alone. The optimum polymer dose (OPD), defined as the polymer dose yielding CST of 20 s, was reduced from 20.6 g kg−1 dry solids for the biosolids alone to 16.3 and 12.6 g kg−1 when BR was 0.75 and 1.5, respectively. Precipitated Al hydrous oxides in the WTR likely caused flocculation of the biosolids particles through heterocoagulation or charge neutralization. The solids contents of the blended materials and biosolids at their respective OPDs were not statistically different (α = 0.05) following dewatering by a belt-filter press. We conclude addition of Al-WTR improved biosolids dewaterability and reduced polymer dosage. In practice, the extent of these benefits may be limited by the quantity of WTR produced relative to the amount of wastewater solids generated by a municipality.

Influence of Water Treatment of LaF3Crystal on LaF3-Based Oxygen Sensor Workable at Room Temperature

1991 ◽  
Vol 30 (Part 2, No. 7B) ◽  
pp. L1327-L1329 ◽  
Author(s):  
Jerzy P. Lukaszewicz ◽  
Norio Miura ◽  
Noboru Yamazoe
Keyword(s):  
Water Treatment ◽  
Room Temperature ◽  
Oxygen Sensor ◽  
Influence Of Water
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