Progressive Freeze Concentration for Volume Reduction of Produced Water and Biodiesel Wastewater

2019 ◽  
Vol 42 (9) ◽  
pp. 1764-1770 ◽  
Author(s):  
Shafirah Samsuri ◽  
Nor Aman Nor Rizan ◽  
Siew Hzien Hung ◽  
Nurul Aini Amran ◽  
Nonni Soraya Sambudi
Keyword(s):  
Produced Water ◽  
Volume Reduction ◽  
Freeze Concentration ◽  
Biodiesel Wastewater

scholarly journals Humidification–Dehumidification (HDH) Desalination and Other Volume Reduction Techniques for Produced Water Treatment

Water ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 60
Author(s):  
Majeda Khraisheh ◽  
Mehreen Inamdar ◽  
Fares AlMomani ◽  
Samer Adham
Keyword(s):  
Water Treatment ◽  
Produced Water ◽  
Volume Reduction ◽  
Power Cycles ◽  
Freeze Concentration ◽  
Reduction Techniques ◽  
Large Bulk ◽  
Present Solution ◽  
Novel Method ◽  
Desalination Technology

Volume reduction has been suggested as a novel method to tackle the various challenges associated with produced water. The present solution offers an economical and environmentally friendly solution to treat a large bulk of produced water that may overwhelm conventional water treatment methods. The current study provides a review of the various volume reduction technologies including freeze concentration, reverse osmosis, and humidification and dehumidification desalination systems. Focus is concentrated on the general HDH technologies in addition to its integration with refrigeration cycles for conditioned air production, and the power cycles for power generation. The GOR, freshwater yield, and efficiencies of the integrated HDH systems were reviewed. Lastly, innovation in the HDH desalination technology is discussed with emphasis on its incorporation with the MVC process.

Membrane separation of produced water

1996 ◽  
Vol 34 (9) ◽  
pp. 239-246 ◽  
Author(s):  
T. Bilstad ◽  
E. Espedal
Keyword(s):  
North Sea ◽  
Suspended Solids ◽  
Produced Water ◽  
Synergistic Effects ◽  
Membrane Surface ◽  
Volume Reduction ◽  
Chemical Cleaning ◽  
The North ◽  
Environmental Controls ◽  
The North Sea

Each time regulatory agencies initiate more stringent environmental controls, treatment technologies are refined to meet the updated standards. Centrifuges and hydrocyclones are, by and large, producing satisfactory effluents for meeting current quality requirements for the offshore petroleum industries. The European standard for effluent from onshore petroleum activities, however, requires less than 5 mg/l total hydrocarbons (HC) and less than 10 mg/l suspended solids. Such low concentrations are out of reach for the above classical separation processes. The amount of produced water in the North Sea is projected to increase by a factor of 6 from 1990 to the year 2000; from 16 to 90 million cubic meters each year. Produced water is the predominant source for oil discharges. The synergistic effects of chemicals, oil and dissolved components in the produced water effluent are given increased attention, with expectations of tougher effluent criteria. Microfiltration (MF) and ultrafiltration (UF) pilot trials with produced water from the Snorre field in the North Sea showed that UF, but not MF, could meet more stringent effluent standards for total HC, suspended solids and dissolved constituents. Total HC in the produced water was typically 50 mg/l and was reduced to 2 mg/l in the UF permeate (96% removal). The aromatics benzene, toluene and xylene (BTX) were similarly reduced by 54% and the heavy metals copper (Cu) and zinc (Zn) by 95%. UF trials were performed with organic tubular membranes with typical transmembrane pressures between 6 and 10 bars. The feed velocities through the tubes were between 2 and 4 m/s. Flux varied from 140 to 550 l/m2/h (lmh) at a produced water temperature of 60°C and membrane molecular weight cut-off between 100,000 and 200,000 daltons. By recirculating UF retentate as membrane feed, a volume reduction (VR) of 24 was obtained in the trials; i.e., 96% permeate recovery. The limited volume of produced water available in the feed tank negated further volume reduction. Full-scale design is based on permeate recovery of 99%. No irreversible fouling of the membrane surface was experienced. The cleanwater flux was restored after chemical cleaning. The alkaline detergent Ultrasil 11 was chosen as the optimal cleaning agent.

Gray matter volume reduction reflects chronic pain in trigeminal neuralgia

2012 ◽  
Vol 43 (01) ◽  
Author(s):  
M Obermann ◽  
R Rodriguez-Raecke ◽  
S Nägel ◽  
D Holle ◽  
N Theysohn ◽  
...  
Keyword(s):  
Chronic Pain ◽  
Trigeminal Neuralgia ◽  
Gray Matter ◽  
Gray Matter Volume ◽  
Volume Reduction ◽  
Matter Volume

Effects of endoscopic lung volume reduction on right ventricular myocardial function in patients with advanced emphysema

Pneumologie ◽  
2014 ◽  
Vol 68 (S 01) ◽  
Author(s):  
C Pizarro ◽  
R Schueler ◽  
C Hammerstingl ◽  
J Kreuz ◽  
U Juergens ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Lung Volume ◽  
Myocardial Function ◽  
Volume Reduction ◽  
Lung Volume Reduction

Volumetric and scintigraphic changes following endoscopic lung volume reduction

Pneumologie ◽  
2015 ◽  
Vol 69 (S 01) ◽  
Author(s):  
C Pizarro ◽  
H Ahmadzadehfar ◽  
M Essler ◽  
G Nickenig ◽  
D Skowasch
Keyword(s):  
Lung Volume ◽  
Volume Reduction ◽  
Lung Volume Reduction

Efficacy of ethanol ablation for treatment of benign cystic thyroid nodules: the first hospital-based study in Vietnam

MedPharmRes ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 18-22
Author(s):  
Van Bang Nguyen ◽  
Van Vy Hau Nguyen ◽  
Binh Thang Tran ◽  
Chi Van Le
Keyword(s):  
Thyroid Nodules ◽  
Multiple Logistic Regression Analysis ◽  
Volume Reduction ◽  
Efficacy And Safety ◽  
Inclusion Criteria ◽  
Ethanol Ablation ◽  
Institutional Review ◽  
Thyroid Cyst ◽  
Secondary Endpoints ◽  
Written Informed Consent

Background: In Vietnam, surgery or aspiration is preferred to treat thyroid cysts however each of them still have limitations. Purposes of this study were to evaluate the efficacy and safety of ethanol ablation in treating thyroid cysts and determine factors that predict the outcome of treatment. Methods: This prospective study was approved by the Ethics Committee of the Institutional Review Board of Family hospital and written informed consent for procedures was obtained. From May 2018 to March 2019, 23 patients who underwent treatment for thyroid cysts by EA were enrolled in this study and were followed up for 1 month at Family hospital. The primary endpoint was efficient after one month as the volume reduction ratio was ≥ 50%. Secondary endpoints were improvements in symptoms, cosmetic scores, and safety. Multiple logistic regression analysis was used. Results: In the finding, from May 2018 to March 2019, only 17 patients who matched inclusion criteria were included in the analyst, including 7 purely thyroid cysts, and 10 predominantly cystic nodules. Mean volume decreased significantly from 5.21 ± 3.37 ml to 2.35 ± 2.52 ml in corresponding to 52.87% of volume reduction with p < 0.05. Ethanol ablation (EA) success rate was 52.90% after 1 month. Symptoms and cosmetic scores were improved significantly. The thyroid function was constant. No adverse events occurred. Purely thyroid cyst was a predictive factor contributing to the success of EA. Conclusion: EA seems likely to be a safe and an efficient therapy for patients who had purely or predominantly cystic thyroid nodules.

Potential of recovering elements from produced water at oil and gas fields, British Columbia, Canada

CIM Journal ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 195-214
Author(s):  
G. J. Simandl ◽  
C. Akam ◽  
M. Yakimoski ◽  
D. Richardson ◽  
A. Teucher ◽  
...  
Keyword(s):  
British Columbia ◽  
Oil And Gas ◽  
Produced Water ◽  
Oil And Gas Fields ◽  
Gas Fields
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