Bioremoval of Lead by Use of Waste Activated Sludge
Journal Title: International Journal of Environmental Research - Year 2009, Vol 3, Issue 3
Abstract
Biological removal of lead was observed in this study during treatment of synthetic solutions of this heavy metal by a sample of waste activated sludge (WAS) having MLSS concentration of 10000 mg/L. The objective was determining the capability of WAS in removal of lead in three different conditions of treatment: without any aeration and feeding, by simultaneous aeration and feeding and by aeration without feeding. Besides, the effect of initial metal concentration and contact time in these treatment stages were determined.Results showed that the efficiency of lead removal was reduced by increasing the initial metal concentration, but the changes of contact time had resulted in different responses depending to the test condition. Moreover, it was found that the effects of aeration and feeding in increasing the efficiency of treatment were more pronounced for the stage of treating lower concentrations of lead. The maximum removal of lead in the first step (without aeration and feeding) was 55.2 % in contact time of 75 minutes, in the second step (without feeding and by 12 hours aeration) 63.3% and third step it was 94.2 % in contact time of 48 hours .The initial lead concentration in these experiments was 5 mg/L.
Authors and Affiliations
K. Rahmani, A. H. Mahvi, F. Vaezi, A. R. Mesdaghinia, R. Nabizade, Sh. Nazmara
Keywords
Related Articles
- EP ID EP83145
- DOI -
- Views 117
- Downloads 0
Recycling and Reuse of Household Plastics
The study was undertaken with the objectives to: (1) Study the present status of plastic waste management and the existing Phnom Penh household willingness and their influence factors to segregate plastics for recycling...
Lessons From Multi-decadal Oceanographic Monitoring at an Estuarine Ecosystem in Argentina
Both climate change and anthropogenic impact are creating a dynamic of continuous changes in ecosystems. While the expected consequences of these changes are global, the occurrence of extreme events and specific environ...
Performance of Biofilter for the Removal of Hydrogen Sulphide Odour
Laboratory scale experiments were performed to evaluate the feasibility of biofilters for the removal of H[sub]2[/sub]S from wastewater treatment plant waste air. The effects of changes in air flow rate and contaminant c...
Partitioning Characteristics of Heavy Metals in a Non-Tidal Freshwater Ecosystem
Trace metals in the aquatic environment have to date come essentially from naturally occurring geochemical resources. However, this has been enhanced by anthropogenic activities resulting in pollution. Consequently, corr...
Bioremoval of Lead by Use of Waste Activated Sludge
Biological removal of lead was observed in this study during treatment of synthetic solutions of this heavy metal by a sample of waste activated sludge (WAS) having MLSS concentration of 10000 mg/L. The objective was det...