Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 280-285 |
| Number of pages | 5 |
| Journal | Desalination and Water Treatment |
| Volume | 12 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - Sep 2010 |
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Improvement in the efficiency of hydrolysis of anaerobic digestion in sewage sludge by the use of enzymes. / Rashed, Ibrahim Gar Al-Alm; Akunna, Joseph C.; El-Halwany, Mohamed Mohamed; Abou Atiaa, Ahmed Farag Fadil.
In: Desalination and Water Treatment, Vol. 12, No. 1-3, 09.2010, p. 280-285.Research output: Contribution to journal › Article
TY - JOUR
T1 - Improvement in the efficiency of hydrolysis of anaerobic digestion in sewage sludge by the use of enzymes
AU - Rashed, Ibrahim Gar Al-Alm
AU - Akunna, Joseph C.
AU - El-Halwany, Mohamed Mohamed
AU - Abou Atiaa, Ahmed Farag Fadil
PY - 2010/9
Y1 - 2010/9
N2 - The effects of enzymatic pre-treatment on a mixture of sludge (primary, secondary, digested) collected from different municipal wastewater-treatment plants was investigated by Batch experiments in the laboratory to enhance the hydrolysis of sludge. The experiments were carried out at mesophilic (37 degrees C) temperature. Six commercially available enzymes, supplied by Novo Industries, were used which ware Alcalase, Caresyme, Celluclast, Lipolase, Termamyl and Viscosyme. The experiment showed that with 50% digested sludge and 0.1% enzyme dosage of Carezyme and the mixed enzymes there was 11.5% and 10.6% decrease in volatile solids (VS), whereas with 25% digested sludge and 0.1% Viscosyme enzyme was very much effective for VS reduction compared with the blank (it shows 16.3% higher than blank). In another set of experiments, which differed in sludge characteristics with 25% digested sludge and 0.5% enzyme dosage the culture containing the mixed enzymes presents the highest percentage of VS reduction among all the samples (13.6% higher than blank), where with 25% digested sludge and 0.5% enzyme dosage of Termamyl and mixed enzymes show 13.5% and 12.8% greater VS reduction respectively compared with the blank. The experimental work showed that enzymatic pre-treatment can be successfully used as a pre-treatment step for treating sludge mixture produced from municipal wastewater treatment plant and the performance of individual enzymes largely depends on the characteristics of sludge.
AB - The effects of enzymatic pre-treatment on a mixture of sludge (primary, secondary, digested) collected from different municipal wastewater-treatment plants was investigated by Batch experiments in the laboratory to enhance the hydrolysis of sludge. The experiments were carried out at mesophilic (37 degrees C) temperature. Six commercially available enzymes, supplied by Novo Industries, were used which ware Alcalase, Caresyme, Celluclast, Lipolase, Termamyl and Viscosyme. The experiment showed that with 50% digested sludge and 0.1% enzyme dosage of Carezyme and the mixed enzymes there was 11.5% and 10.6% decrease in volatile solids (VS), whereas with 25% digested sludge and 0.1% Viscosyme enzyme was very much effective for VS reduction compared with the blank (it shows 16.3% higher than blank). In another set of experiments, which differed in sludge characteristics with 25% digested sludge and 0.5% enzyme dosage the culture containing the mixed enzymes presents the highest percentage of VS reduction among all the samples (13.6% higher than blank), where with 25% digested sludge and 0.5% enzyme dosage of Termamyl and mixed enzymes show 13.5% and 12.8% greater VS reduction respectively compared with the blank. The experimental work showed that enzymatic pre-treatment can be successfully used as a pre-treatment step for treating sludge mixture produced from municipal wastewater treatment plant and the performance of individual enzymes largely depends on the characteristics of sludge.
U2 - 10.5004/dwt.2010.1575
DO - 10.5004/dwt.2010.1575
M3 - Article
VL - 12
SP - 280
EP - 285
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
SN - 1944-3994
IS - 1-3
ER -