Influence of anoxic selectors on heavy metal removal by activated sludge

2000 ◽  
Vol 5 (6) ◽  
pp. 431-435 ◽  
Author(s):  
Jay H. Niec ◽  
Daniel K. Cha
Keyword(s):  
Heavy Metal ◽  
Activated Sludge ◽  
Metal Removal ◽  
Heavy Metal Removal

scholarly journals Comparison of heavy metal removal efficiencies in four activated sludge processes

2015 ◽  
Vol 22 (10) ◽  
pp. 3788-3794 ◽  
Author(s):  
Jun Yang ◽  
Ding Gao ◽  
Tong-bin Chen ◽  
Mei Lei ◽  
Guo-di Zheng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Activated Sludge ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Removal Efficiencies ◽  
Activated Sludge Processes

Heavy metal-binding proteins from metal-stimulated bacteria as a novel adsorbent for metal removal technology

2006 ◽  
Vol 53 (6) ◽  
pp. 221-226 ◽  
Author(s):  
D. Sano ◽  
K. Myojo ◽  
T. Omura
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Activated Sludge ◽  
Metal Binding ◽  
Binding Proteins ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Copper Ion ◽  
Amino Acid Sequences ◽  
Heavy Metal Binding

Water pollution with toxic heavy metals is of growing concern because heavy metals could bring about serious problems for not only ecosystems in the water environment but also human health. Some metal removal technologies have been in practical use, but much energy and troublesome treatments for chemical wastes are required to operate these conventional technologies. In this study, heavy metal-binding proteins (HMBPs) were obtained from metal-stimulated activated sludge culture with affinity chromatography using copper ion as a ligand. Two-dimensional electrophoresis revealed that a number of proteins in activated sludge culture were recovered as HMBPs for copper ion. N-termini of five HMBPs were determined, and two of them were found to be newly discovered proteins for which no amino acid sequences in protein databases were retrieved at more than 80% identities. Metal-coordinating amino acids occupied 38% of residues in one of the N-terminal sequences of the newly discovered HMBPs. Since these HMBPs were expected to be stable under conditions of water and wastewater treatments, it would be possible to utilize HMBPs as novel adsorbents for heavy metal removal if mass volume of HMBPs can be obtained with protein cloning techniques.

Stimulation of activated sludge cultures for enhanced heavy metal removal

1995 ◽  
Vol 67 (5) ◽  
pp. 822-827 ◽  
Author(s):  
Duk Chang ◽  
Kensuke Fukushi ◽  
Sambhunath Ghosh
Keyword(s):  
Heavy Metal ◽  
Activated Sludge ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Stimulation Of

Mechanisms of heavy-metal removal by activated sludge

Chemosphere ◽  
2009 ◽  
Vol 75 (8) ◽  
pp. 1028-1034 ◽  
Author(s):  
F. Pagnanelli ◽  
S. Mainelli ◽  
L. Bornoroni ◽  
D. Dionisi ◽  
L. Toro
Keyword(s):  
Heavy Metal ◽  
Activated Sludge ◽  
Metal Removal ◽  
Heavy Metal Removal

scholarly journals Heavy Metal Removal Investigation in Conventional Activated Sludge Systems

2020 ◽  
Vol 6 (3) ◽  
pp. 470-477 ◽  
Author(s):  
Magdi Buaisha ◽  
Saziye Balku ◽  
Şeniz Özalp Yaman
Keyword(s):  
Heavy Metal ◽  
Activated Sludge ◽  
Heterotrophic Bacteria ◽  
Metal Removal ◽  
Waste Water Treatment ◽  
Heavy Metal Removal ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Industrial Plant ◽  
Final Effluent

The combination of industrial and domestic wastewater in municipal WWTPs (waste water treatment plants) may be economically profitable, but it increases the difficulty of treatment, and also has some detrimental effects on the biomass and causes a low-quality final effluent. The present study evaluates the treatment process both in the presence and absence of heavy metals using ASM3 (activated sludge model no.3) so as to improve the model by means of incorporating other novel inhibitory kinetic and settler models. The results reveal that the presence of heavy metal, a case study for copper and cadmium at a concentration of 0.7 mgL−1 in a biological treatment system has a negative effect on heterotrophic bacteria concentration by 25.00 %, and 8.76 % respectively. Meanwhile, there are no important changes in COD (chemical oxygen demand), SS (total suspended solids) and TN (total nitrogen) in the final effluent in the conventional system. However, all these parameters are acceptable and consistent with EU Commission Directives. The results indicate that ASM3 can predict and provide an opportunity of the operation for an activated sludge wastewater treatment plant that receives the effluent from an industrial plant.

Heavy metal removal by activated sludge: influence of Nocardia amarae

Chemosphere ◽  
2002 ◽  
Vol 46 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Dong W. Kim ◽  
Daniel K. Cha ◽  
J. Wang ◽  
C.P. Huang
Keyword(s):  
Heavy Metal ◽  
Activated Sludge ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Nocardia Amarae
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