Comparison of the Biological NH3 Removal Characteristics among Four Inorganic Packing Materials.

Hirai, Mitsuyo; KAMAMOTO, MANABU; Yani, Mohamad; Shoda, Makoto

doi:10.1263/jbb.91.428

Cited by 15 publications

(17 citation statements)

References 10 publications

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“…For the growth of mixed culture, the chemical composition of NH 4 Cl, MgCl 2 .6H 2 O, KH 2 PO 4 , K 2 HPO 4 , NaNO 3 , yeast extract and Na 2 S 2 O 3 .5H 2 O were 0.6, 0.2, 1.2, 1.2, 0.3, 1 and 7 g/L, respectively. Also, 2 mL of vitamin solution and 1 mL of trace metals were added to the prepared synthetic medium [12]. All the chemicals used were analytical graded and supplied by Merck (Darmstadt, Germany).…”

Section: Bacteria and Medium Preparationmentioning

confidence: 99%

Hydrogen sulfide elimination from natural gas by native isolated bacteria from hot-spring

et al. 2017

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Recently due to strict environmental regulations, concentration of hazardous organic sulfur compounds from gas stream should be reduced. A new efficient method for removal of hydrogen sulfide from natural gas is required. Conventional methods for desulfurization are very costly and required solvent, high operation temperature, and pressure. In contrary, biological processes have great potential to eliminate hydrogen sulfide under mild conditions. Extensive research has been conducted on sulphur oxidizing bacteria for the removal of hydrogen sulfide. However, with present achievements is still not enough to satisfy the industrial requirements. To improve the biodesulfurization efficiency additional research required to isolate a particular strain organism. In this article the ability of newly isolated bacteria was discussed. For this purpose the mixed culture was isolated from native hot spring in the hill side of Damavand Mountain (in North of Iran). The isolated culture was inoculated on nutrient plate agar under anaerobic condition. After incubation for duration 72 h two distinct colonies white and yellow color were observed. Each species was separately grown in nutrient broth and then the optimal conditions were obtained. The desired conditions for white colony such as temperature, pH and agitation rate were 36˚C, 6.5 and 180 rpm, respectively. All the above conditions for yellow colony were identical except for pH slightly reduced to 6. On the basis of optimal biodesulfurization conditions, maximum cell dry weight for the each isolated specie was achieved; approximately were 1.35 and 1.12 g.l -1 for white and yellow colony respectively. The removal of hydrogen sulfide from natural gas stream as the aim of present work was obtained. The percentage removals were 67 and 35% for white and yellow colony, respectively.

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Section: Bacteria and Medium Preparationmentioning

confidence: 99%

Hydrogen sulfide elimination from natural gas by native isolated bacteria from hot-spring

et al. 2017

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“…For wastewater treatment, the advantages of an appropriate inert carrier are as follows: insoluble, nonbiodegradable, non-toxic, non-polluting, light weight; flexible in overall shape, highly mechanically and chemically stable, highly diffuse, simple immobilization procedure, high biomass retention, and preferably a low cost [5]. In addition, inert carriers are also much easier to clean and replace [6,7]. Porous ceramic beads have been shown to be an appropriate packing material for wastewater treatment and other biotechnological applications, in particular, due to their high gas and liquid film mass transfer coefficients, high chemical and temperature resistance, mechanical strength, minimization of diffusion limitations of nutrients, etc.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of a Ceramic Carrier after Wastewater Treatment Process in the Model Column Cascade with Ethanol Addition

Bērziņš¹,

Petrina²,

Nikolajeva³

et al. 2015

TOBIOTJ

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Nitrogen and phosphorus removal from wastewater remains one of the serious environmental problems worldwide. The present study was aimed at combining the both nitrification and phosphorus accumulation processes in the laboratory-scale model system. Synthetic wastewaters (28 mg N-NH 4 + L -1 ) were treated consequently in the cascade of three columns, which were designed for nitrification and phosphorus accumulation processes, respectively, and were packed with porous ceramic beads. Six treatment cycles of seven days in each column were performed. Addition of 3% ethanol to wastewater increased the efficiency of ammonium removal in the first column of the cascade during the 7 day period to 81.9 %, which was accompanied by a decrease of pH from 7.3 to 6.2. An increase of soluble phosphates was shown in Columns II and III of the cascade. Microbial enzyme activity, number of CFU and diversity of the microbial community differed among the three columns tested. The most active biofilm formation was detected in Column I. The thermal analysis of beads has revealed mass losses of 0.23% and 0.08%, due to decomposition of light volatile organic substances at 173 C and 481 C, respectively. In turn, the beads in Column II and III were not covered by thick biofilm, while blue crystals were found on the surface. Accumulation of nitrogen and phosphorus on the beads was detected. Vegetation experiments have revealed some stimulation effect of the beads applied as an amendment to loamy sand soil, to the growth of rye and cress.

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“…Some of the most frequently used inert packing materials include perlite, porous ceramics, activated carbon, porous lava, polyamide and polypropylene beads, and polyvinyl difluoride cubes has become prevalent [1,[9][10][11][12][13]. Although the cost of inert filter beads, in most cases, is higher compared to that of organic counterparts, the former have a range of advantages: chemical and physical inactivity, long lifetime, high performance, more regular shape, uniform air distribution, and reduced number of channeling issues.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Nitrification Process by a Bacterial Consortium in the Submerged Biofiltration System with Ceramic Bead Carrier

Muter¹

2014

J Microb Biochem Technol

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Laboratory-scale solid phase submerged system was developed to study the process of ammonium biodegradation. Ceramic beads were found to be an appropriate carrier material for the attachment of thePNN bacterial consortium (Pseudomonas sp., Nitrosomonas sp., Nitrobacter sp.) exhibiting nitrification/denitrification activity. This consortium was previously isolated from a biological activated sludge process at a fish factory wastewater treatment plant. Three organic amendments -molasses, humic acid extract, and malt extract -were used for the ceramic bead pretreatment. Molasses significantly enhanced (p<0.05) the process of bacteria attachment onto the ceramic carrier and further ammonium removal from the bulk liquid media. The addition of 0.45% fructose to the column notably enhanced ammonium oxidation, as demonstrated by more rapid formation of nitrites in the medium when compared to the sets without sugars. The results of this study could be incorporated in a larger-scale test of a biofiltration column using wastewater from a fish processing factory.

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Comparison of the Biological NH3 Removal Characteristics among Four Inorganic Packing Materials.

Cited by 15 publications

References 10 publications

Hydrogen sulfide elimination from natural gas by native isolated bacteria from hot-spring

Hydrogen sulfide elimination from natural gas by native isolated bacteria from hot-spring

Characteristics of a Ceramic Carrier after Wastewater Treatment Process in the Model Column Cascade with Ethanol Addition

Optimization of Nitrification Process by a Bacterial Consortium in the Submerged Biofiltration System with Ceramic Bead Carrier

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