Assessment of Co-Processing Technology as a Total Solution to Treat Oily Sludge Waste in Indonesia

Nitrogen-doped porous carbon (NPC) for high-performance supercapacitors has been synthesized from oily sludge waste by using KOH activation combined with in situ nitrogen doping method. The NPC possesses a hierarchical porous structure with high surface area of 2514.7[Formula: see text]m2[Formula: see text]g[Formula: see text], large pore volume of 2.383[Formula: see text]cm3 g[Formula: see text] and nitrogen content of 4.32%. The NPC-based electrode can deliver an outstanding capacitance of 414.2[Formula: see text]F[Formula: see text]g[Formula: see text] at 0.5[Formula: see text]A[Formula: see text]g[Formula: see text] and a good capacitance rate performance of 307.5[Formula: see text]F[Formula: see text]g[Formula: see text] (74.2% retention) at 50[Formula: see text]A[Formula: see text]g[Formula: see text]. Moreover, the NPC exhibits an excellent cycling stability with little loss of capacitance after 5000 cycles at 5[Formula: see text]A[Formula: see text]g[Formula: see text].

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Oily sludge degrading potentials of single and consortium of autochthonous bacterial species

GSC Advanced Research and Reviews ◽

10.30574/gscarr.2021.8.3.0192 ◽

2021 ◽

Vol 8 (3) ◽

pp. 093-101

Author(s):

Nsikak A. Abraham ◽

Lucky O. Odokuma ◽

Gideon C. Okpokwasili

Keyword(s):

Bacterial Population ◽

Oil And Gas ◽

Saturated Hydrocarbon ◽

Bacterial Species ◽

Oil And Gas Industry ◽

Oily Sludge ◽

Gas Industry ◽

Emulsification Index ◽

Single Culture ◽

Sludge Waste

Oily sludge (OS) degrading potentials of single and consortium autochthonous bacterial population was carried out using standard analytical procedures. Three autochthonous bacterial species; Pseudomonas aeruginosa, Bacillus cibi and Bacillus subtilis were associated with the OS. The isolates exhibited varying OS utilizing and biosurfactant producing potentials. P. aeruginosa was the best OS utilizer while B. subtilis was the best biosurfactant producer (emulsification index of 15.6%). Degradation of the OS with single culture of the best OS utilizer (P. aeruginosa) and consortium of the best OS utilizer and best biosurfactant producer (B. subtilis) revealed that the consortium exhibited a remarkable potential to reduce the total petroleum concentration in the OS from 100.73 ppm to 41.39 ppm (58.91% degradation) as compared to 51.74 ppm (48.7% degradation) achieved by the single culture. The saturated fraction of the OS was the most susceptible to degradation followed by the aromatic faction while the NSO and asphaltene fraction were the least degraded. P. aeruginosa was able to reduce the saturated hydrocarbon content in the OS by 87.4% while a 95.5% reduction was recorded for the consortium. Similarly, the concentration of PAH in the OS was reduced from 27.94 ppm to 16.74 ppm by the single culture and 12.75 by the consortium. The potentials of these bacterial communities can be explored for broader use in remediating oily sludge contaminated soil as well as managing oily sludge waste in the oil and gas industry.

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Slurry-phase biodegradation of weathered oily sludge waste

Chemosphere ◽

10.1016/j.chemosphere.2007.06.017 ◽

2008 ◽

Vol 70 (4) ◽

pp. 737-744 ◽

Cited By ~ 51

Author(s):

C. Machín-Ramírez ◽

A.I. Okoh ◽

D. Morales ◽

K. Mayolo-Deloisa ◽

R. Quintero ◽

...

Keyword(s):

Oily Sludge ◽

Slurry Phase ◽

Sludge Waste

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Toxicity of raw and bio slurry treated oily sludge on Nitrobacter species and Tilapia guineensis

GSC Advanced Research and Reviews ◽

10.30574/gscarr.2021.8.3.0193 ◽

2021 ◽

Vol 8 (3) ◽

pp. 087-092

Author(s):

Nsikak A. Abraham ◽

Lucky O. Odokuma ◽

Gideon C. Okpokwasilli

Keyword(s):

Bacterial Population ◽

Oil And Gas ◽

Bacterial Species ◽

Cost Effective ◽

Oil And Gas Industry ◽

Bacterial Consortium ◽

Oily Sludge ◽

Gas Industry ◽

Cost Effective Method ◽

Sludge Waste

Toxicity of raw and bio-slurry treated oily sludge (OS) on Nitrobacter species was determined using standard analytical procedures. The total petroleum content of the OS was 116.44 ± 3.57 g/kg. The TPH was rich with Saturate (40.46 ± 0.73 %). This was followed by Aromatics (27.94 ± 0.50 %) and Asphaltenes (26.58 ± 0.90 %), while NSO fraction had the least proportion (5.75 ± 0.47 %). Contamination of coastal soil with the OS increased the residual TPH concentration in the soil from 5.0561 ppm to 24.2305 ppm. The OS-ladened soil were subjected to biodegradation using 1.5-litter borosilicate glass bioreactors bioaugmented with single population of known OS utilizer (Pseudomonas aeruginosa) and consortium of known OS utilizer and biosurfactant producing bacterial species (Bacillus subtilis). Findings revealed that he bioslurry augmented with the bacterial consortium reduced the concentration of the residual TPH in the soil to 6.313 ppm (73.95% reduction) while 11.5751 ppm (52.23%) was recorded for the single bacterial population. Findings also revealed that the consortium were able to remarkable reduce the toxicity of the raw OS (LC50 = 20.94 ppt) on Nitrobacter species. The LC50 for the consortium treated OS was 104.64 ppt while that of single bacterial population treatment was 36.25 ppt. The reduction in the toxicity of the OS treated with the bacterial consortium indicates the potentials of the synergistic action between the biosurfactant producer and OS utilizer to reduce OS toxicity. The findings of this study can be explored as a cost-effective method for oily sludge waste management in the Oil and Gas industry.

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Theoretical study on the leakage characteristics of Disc-Seal Single Screw Pump used in oily sludge waste heat source absorption refrigeration system

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1180/1/012044 ◽

2021 ◽

Vol 1180 (1) ◽

pp. 012044

Author(s):

Z L Wang ◽

H W Shi ◽

S Y Wang ◽

Z M Wang ◽

M M Hao ◽

...

Keyword(s):

Theoretical Study ◽

Waste Heat ◽

Oily Sludge ◽

Absorption Refrigeration ◽

Refrigeration System ◽

Screw Pump ◽

Single Screw ◽

Sludge Waste ◽

Leakage Characteristics ◽

Absorption Refrigeration System

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Digital differential hysteresis iimage processing displays what the microscope acquires but the eye can't see

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100139585 ◽

1995 ◽

Vol 53 ◽

pp. 642-643

Author(s):

Klaus-Ruediger Peters

Keyword(s):

Image Processing ◽

Visual System ◽

High Precision ◽

Image Data ◽

Processing Technology ◽

Output Data ◽

Contrast Resolution ◽

Pixel Intensity ◽

Data Reading ◽

Hysteresis Properties

Differential hysteresis processing is a new image processing technology that provides a tool for the display of image data information at any level of differential contrast resolution. This includes the maximum contrast resolution of the acquisition system which may be 1,000-times higher than that of the visual system (16 bit versus 6 bit). All microscopes acquire high precision contrasts at a level of <0.01-25% of the acquisition range in 16-bit - 8-bit data, but these contrasts are mostly invisible or only partially visible even in conventionally enhanced images. The processing principle of the differential hysteresis tool is based on hysteresis properties of intensity variations within an image.Differential hysteresis image processing moves a cursor of selected intensity range (hysteresis range) along lines through the image data reading each successive pixel intensity. The midpoint of the cursor provides the output data. If the intensity value of the following pixel falls outside of the actual cursor endpoint values, then the cursor follows the data either with its top or with its bottom, but if the pixels' intensity value falls within the cursor range, then the cursor maintains its intensity value.

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