Development of biological process with pure bacterial cultures for effective bioconversion of sewage treatment plant sludge

Alam, Md. Zahangir and Muyibi, Suleyman Aremu and Jamal, Parveen (2007) Development of biological process with pure bacterial cultures for effective bioconversion of sewage treatment plant sludge. Journal of Environmental Science and Health Part A, 42. pp. 337-344. ISSN 1093-4529 (Print); 1532-4117 (Online)

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Abstract

Forty-six bacterial strains were isolated from nine different sources in four treatment plants namely IndahWater Konsortium (IWK)sewage treatment plant (STP), International Islamic University Malaysia (IIUM) wastewater treatment plant-1,-2 and -3 to evaluate the bioconversion process in terms of efficient biodegradation and bioseparation. The bacterial strains isolated were found to be 52.2% (24 isolates) and 47.8% (22 isolates) in the IWK and IIUM treatment plants, respectively. The results showed that higher microbial population (9–10 × 104 cfu/mL) was observed in the secondary clarifier of IWK treatment plant. Among the isolates, 23 isolates were gram-positive bacillus (GPB) and gram-positive cocci (GPC), 19 isolates were gram-negative bacillus (GNB) and gram-negative cocci (GNC), and the rest were undetermined. Gram-negative cocci (GNC) were not found in the isolates from IWK. A total of 15 bacterial strains were selected for effective and efficient sludge bioconversion. All the strains were tested against sludge (1% total suspended solids, TSS) to evaluate the biosolids production (TSS% content), chemical oxygen demand (COD) removal and filtration rate (filterability test). The strain S-1 (IWK1001) showed lower TSS content (0.8% TSS), maximumCODremoval (84%) and increased filterability (1.1 min/10 mL of filtrate) of treated sludge followed by the strains S-11, S-14, S-2, S-15, S-13, S-7, S-8, S-4, S-3, S-6, S-12,S-16, S-17 and S-9. The pH values in the fermentation broth were affected by the bacterial cultures and recorded as well. Effective bioconversion was observed during the first three days of sludge treatment.

Item Type:	Article (Journal)
Additional Information:	4157/5037
Uncontrolled Keywords:	Isolation, screening, sewage treatment plant sludge, liquid state bioconversion, pure bacterial culture.
Subjects:	T Technology > TP Chemical technology T Technology > TP Chemical technology > TP248.13 Biotechnology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Dr. Md. Zahangir Alam
Date Deposited:	25 Jun 2013 11:51
Last Modified:	25 Jun 2013 11:52
URI:	http://irep.iium.edu.my/id/eprint/5037

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