scholarly journals Microbial characterization of solid waste

2007 ◽  
pp. 511-515
Author(s):  
Eftekhar Hossain ◽  
Emran Chowdhury
Keyword(s):  
Solid Waste ◽  
Total Coliform ◽  
High Concentration ◽  
Hospital Waste ◽  
Pseudomonas Spp ◽  
Surrounding Environment ◽  
Shigella Spp ◽  
Microbial Characterization ◽  
Different Sources

Segregation of solid waste at source is not a common practice in Bangladesh. Nonsegregation of solid waste creates threat to surrounding environment To identify the possiblethreat, leachates were collected from different sources viz. household bin, Dhaka citycorporation (DCC) bin, hospital waste bin and dumping ground; and analyzed for microbialcharacterization. High concentration of total coliform (9.0x I 04 -1.1 x I 08 CFU/100ml) andfecal coliform (5.0xl04-6.0xl07 CFU/I00mL) were obtained in all samples, Nematodes werefound in DCC bin (5200 No/L) and dumping ground (5600 No/L) samples. Protozoa andSalmonella spp/Shigella spp. were not found in any sample. However, Pseudomonas spp waspresent in the leachates of household bin, DCC bin and dumping ground.

Analyzing the Reuse Potentials of Landfilled Solid Wastes for Farm Water Treatment and Reuse

2021 ◽  
Vol 47 (3) ◽  
pp. 417-424
Author(s):  
Anijiofor Sandra Chinenyenwa ◽  
Nik Daud Nik Norsyhariati ◽  
Idrus Syazwani ◽  
Che Man Hasfalina
Keyword(s):  
Wastewater Treatment ◽  
Solid Waste ◽  
Solid Waste Management ◽  
Total Coliform ◽  
Organic Content ◽  
Bet Surface Area ◽  
Bioreactor Landfills ◽  
Irregular Shapes ◽  
Air Diffusion

The increasing solid waste management problems in developing countries necessitated landfill mining to determine the reuse potentials of landfilled solid waste materials. In this study, characterization of landfilled solid waste obtained from a closed landfill site in Malaysia was conducted to ascertain its reuse potentials for biodegradation in wastewater treatment. The results revealed adequate neutral pH, Moisture Content of 34 %, Organic Content of 10.4 % and Bacterial Population in terms of Total Coliform of 8.3 × 105 CFU/100 mL, which are ideal conditions for biodegradation while porosity n of 51%, allow free flow of water during treatment. The SEM showed irregular shapes and pore spaces and a BET surface area of 3.376 m 2 g-1 which enables adsorption of pollutants on its surface, air diffusion and re-aeration. Furthermore, the waste material was used as media for biodegradation in a lab-scale bioreactor at a hydraulic loading of 4 L m-3 d-1 and inflow rate of 0.1 L min-1. The results showed maximum removal rates of 95, 97, 86, 70, 70, and 98% for COD, BOD, TSS, TDS, NH3-N, and TP respectively. Utilization of this technology as bioreactor landfills will solve landfill congestion and also provide cheap wastewater treatment option.

Characterization of the Anoxic Sediments of Rio Tinto: Biohydrometallurgical Implications

2009 ◽  
Vol 71-73 ◽  
pp. 109-112 ◽  
Author(s):  
A. García-Moyano ◽  
E. González-Toril ◽  
R. Amils
Keyword(s):  
Acidic Ph ◽  
Acidic Environment ◽  
High Concentration ◽  
Rio Tinto ◽  
Microbial Characterization ◽  
The Rich ◽  
Metabolic Properties ◽  
And Control ◽  
Río Tinto

Rio Tinto, a natural extreme acidic environment with a rather constant acidic pH and a high concentration of heavy metals, is the product of the metabolic activity of chemolithotrophic microorganisms thriving in the rich complex sulfides of the Iberian Pyritic Belt. Up to now the microbial characterization has been made mainly in the water column and biofilm samples. Since all ferric reducing activities will not benefit the bioleaching operations, we consider it critical to ascertain the ecology and metabolic properties of the microorganisms inhabiting the anoxic part of the sediments, to facilitate the design and control the operation of heap bioleaching processes, maximizing their efficiency. The implication of these microorganisms in biohydrometallurgical operations is discussed.

Characterization of Oily Sludge with Different Sources

2014 ◽  
Vol 1073-1076 ◽  
pp. 933-936 ◽  
Author(s):  
Xiao Yuan Zheng ◽  
Bo Wang ◽  
Yong Chi ◽  
Yu Qi Jin
Keyword(s):  
Oil Sands ◽  
Energy Resources ◽  
Oily Sludge ◽  
Petroleum Processing ◽  
High Concentration ◽  
Oil Sands Bitumen ◽  
Different Sources

Oily sludge is inevitably produced in numerous petroleum processing operations. Five oily sludge samples were collected to identify the compositions and to characterize the extracted solids. The results indicated that three fifths of the samples contained significant amounts of oil and could be potentially recovered as energy resources. All of the samples had high concentration of water. The compositions of C, H, and N, as well as H/C in the separated oils were close to those in oil sands bitumen. The high concentration of asphaltenes agreed with the low H/C. The XRD spectra showed that the major minerals contained in the extracted solids were quartz and calcite.

scholarly journals ISOLATION AND CHARACTERIZATION OF SULFUR-OXIDIZING BACTERIA (SOB) FROM WASTE OF RUBBER FACTORY AND PAPER IN JAMBI

2019 ◽  
Vol 1 (2) ◽  
pp. 131-139
Author(s):  
Suparjo
Keyword(s):  
Soil Fertility ◽  
Biochemical Characterization ◽  
Selective Medium ◽  
High Concentration ◽  
Isolation And Characterization ◽  
Sulfur Bacteria ◽  
Ph Reduction ◽  
Sulfur Oxidizing ◽  
Different Sources

Sewage contains high concentration of sulfate and contaminates ground water supply. The production process in the factory produced sewage containing high amount of sulfur such as sulphide and sulphate. Sulfur bacteria, which are capable of oxidizing, reducing or partially oxidizing inorganic sulfur compounds such as Thiomicrospira, Thiothrix, Desulforomonas, Achromatium, and a group of Thiobacillus. Utilization of sulfur bacteria has done in attemp to find sewage bioremediation agents as well as to promote soil fertility. Isolation and characterization were carried out by growing the bacteria in the starkey selective medium, including pH reduction test, morphology, physiology and biochemical characterization. It has been observed that out of 2 isolates from different sources of samples (rubber and paper sewage), only one isolates related to sulfur-oxidizing bacterium (SOB) while  the isolates AE01 related to true sulfur-oxidizing bacterium in genus Thiobacillus.

Management and engineering solutions to improve stripping equipment efficiency in Chernogorksy open pit mine

2018 ◽  
pp. 36-48
Author(s):  
G. N. Shapovalenko ◽  
S. N. Radionov ◽  
V. V. Gorbunov ◽  
V. A. Khazhiev ◽  
V. Yu. Zalyadnov ◽  
...  
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
High Concentration ◽  
Open Pit Mines ◽  
Blasting Operation ◽  
Internal Dump ◽  
Mining Conditions ◽  
Mining Front ◽  
Comparison Of Equipment

Chernogosky open pit mine integrates truck-and-shovel system of mining with overburden rehandling to internal dump with a set of walking excavators for rehandling of overburden to mined-out area of the pit. It is possible to improve efficiency of stripping in the conditions of Chernogorsky OPM by reducing percentage of stripping with more expensive handling system. The relevant research and solutions to this effect are presented in this article. Comparative characterization of mining conditions and parameters of mining systems applied is given for open pit mines Chernogorsky, Turnui, Nazarovsky, Vostochno-Beisky and Izykh. The comparative analysis points at the need to account for difficulty of mining and process sites in comparison of equipment productivity. High concentration of mining machines, which is conditioned by narrow mining front and simultaneous operation of five faces, as well as blasting operation implemented every 1-2 days, are recognized as the main constraints of excavator capacity in mining with direct dumping in Chernogorsky open pit mine. The management and engineering solutions implemented in the mine and resulted in higher efficiency of draglines are described.

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