PMID- 22442942
OWN - NLM
STAT- MEDLINE
DCOM- 20120419
LR  - 20190911
IS  - 1096-2247 (Print)
IS  - 1096-2247 (Linking)
VI  - 62
IP  - 2
DP  - 2012 Feb
TI  - Resource recycling through artificial lightweight aggregates from sewage sludge 
      and derived ash using boric acid flux to lower co-melting temperature.
PG  - 262-9
AB  - This study focuses on artificial lightweight aggregates (ALWAs) formed from 
      sewage sludge and ash at lowered co-melting temperatures using boric acid as the 
      fluxing agent. The weight percentages of boric acid in the conditioned mixtures 
      of sludge and ash were 13% and 22%, respectively. The ALWA derived from sewage 
      sludge was synthesized under the following conditions: preheating at 400 degrees 
      C 0.5 hr and a sintering temperature of 850 degrees C 1 hr. The analytical 
      results of water adsorption, bulk density, apparent porosity, and compressive 
      strength were 3.88%, 1.05 g/cm3, 3.93%, and 29.7 MPa, respectively. Scanning 
      electron microscope (SEM) images of the ALWA show that the trends in water 
      adsorption and apparent porosity were opposite to those of bulk density. This was 
      due to the inner pores being sealed off by lower-melting-point material at the 
      aggregates'surface. In the case of ash-derived aggregates, water adsorption, bulk 
      density, apparent porosity, and compressive strength were 0.82%, 0.91 g/cm3, 
      0.82%, and 28.0 MPa, respectively. Both the sludge- and ash-derived aggregates 
      meet the legal standards for ignition loss and soundness in Taiwan for 
      construction or heat insulation materials.
FAU - Hu, Shao-Hua
AU  - Hu SH
AD  - Department of Environmental Resources Management, Dahan Institute of Technology, 
      Hualien, Taiwan. shaohwa@ms01.dahan.edu.tw
FAU - Hu, Shen-Chih
AU  - Hu SC
FAU - Fu, Yen-Pei
AU  - Fu YP
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Air Waste Manag Assoc
JT  - Journal of the Air & Waste Management Association (1995)
JID - 9503111
RN  - 0 (Boric Acids)
RN  - 0 (Sewage)
RN  - R57ZHV85D4 (boric acid)
SB  - IM
MH  - Boric Acids/*chemistry
MH  - Compressive Strength
MH  - Hot Temperature
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - Particle Size
MH  - Recycling
MH  - Sewage/*chemistry
EDAT- 2012/03/27 06:00
MHDA- 2012/04/20 06:00
CRDT- 2012/03/27 06:00
PHST- 2012/03/27 06:00 [entrez]
PHST- 2012/03/27 06:00 [pubmed]
PHST- 2012/04/20 06:00 [medline]
AID - 10.1080/10473289.2011.646051 [doi]
PST - ppublish
SO  - J Air Waste Manag Assoc. 2012 Feb;62(2):262-9. doi: 10.1080/10473289.2011.646051.