This powerpoint presentation begins by presenting management options for
residual solids, including the following:
dispose of wet residuals (liquid and solid)
to a wastewater treatment plant through a
sewer connection;
dewater wet residuals to reduce water
content and dispose of solids in a landfill; and,
increasing regulations regarding residual
disposal. The
growing trend in research for possible
reuse and recycle options, especially in
water and wastewater treatment residual solids (WTRS) is presented. WTRSs as a water treatment
material includes:
Alum Recovery;
Wet residual solids - used as a coagulant,
sewage treatment (Galarneau and Gehr, 1997),
hydrophobic dye removal (Chu, 2001), and
lead removal (Chu, 1999);
dry residual solids - used as an adsorbent,
phosphorus adsorption (Kim et al, 2003, Mortula
et al, 2007), and
suitable for wastewater treatment. Batch adsorption experiments are presented, along with partial analysis of dried
WTRSs, Langmuir Isotherm Modelling, and practical implications. Presentation summary includes the following:
ferric and lime residual solids appeared to be a
stronger adsorbent than the alum residual solids
for phosphate adsorption from spiked DI water
and wastewater effluent;
nearly 100% of phosphate was removed from
wastewater during adsorption onto all residuals;
competing species in wastewater (i.e., TOC)
appeared to impact adsorption on lime and alum
solids;
competing species in wastewater did not appear
to impact adsorption on ferric solids; similarities in arsenate and phosphate
chemistry provide another application for
the reuse of WTRSs; and,
despite differences in Qmax, alum, ferric,
and lime residuals adsorbed phosphate
from DI water and MWW effluent, reaching
> 90% removal,
potential for application in wastewater
industry, provided integrity is verified. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 3.1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 28 |
| Published : | 11/01/2008 |
