Characterization of Boiler Blowdown Water from Steam-Assisted Gravity Drainage and Silica–Organic Coprecipitation during Acidification and Ultrafiltration

Maiti, Abhijit; Sadrezadeh, Mohtada; Thakurta, Subhayan Guha; Pernitsky, David; Bhattacharjee, Subir

doi:10.1021/ef300865e

Cited by 41 publications

(63 citation statements)

References 52 publications

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“…By increasing the pH from 7 to 10, the flux increased to an even higher value than the initial flux at the initial raw WLS inlet water pH. Decreasing the pH increases the rate of co-precipitation of organic matter and silica, which causes a sharp flux decline, especially for denser membranes [4,75]. This is attributed to the quick change of foulant/foulant and foulant/membrane interactions by pH alteration.…”

Section: Membrane Operation With Varying Phmentioning

confidence: 97%

Treatment of anin situoil sands produced water by polymeric membranes

Hayatbakhsh

Sadrzadeh

Pernitsky

et al. 2015

Desalination and Water Treatment

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A B S T R A C TCross-flow ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO) were applied for the first time on a produced water obtained from a thermal in situ bitumen recovery process called steam-assisted gravity drainage (SAGD), with the intent to remove salt, silica, and dissolved organic matter (DOM) so that the produced water could be re-used as highquality boiler feedwater. It was found that more hydrophilic and more negatively charged membranes were less susceptible to fouling. The UF membrane tested rejected a maximum of 30% of the salt and silica and 50% of the DOM. Nanofiltration with loose membranes removed more than 70% of the salt and DOM. The tight NF membranes tested removed more than 86% of the salt, silica, and DOM, and consumed less energy than RO, which showed almost the same rejection. An instantaneous increase in water flux resulting from a step change in feedwater pH demonstrated the critical role of pH in flux recovery and in fouling mitigation. Analysis of the fouled membranes indicated presence of silica, iron, and calcium in the foulant material. Feed and permeate characterization showed that mainly hydrophilic DOM passed through the membrane. The study provides valuable insights regarding the suitability of membranes as alternatives to conventional SAGD water treatment methods, especially in terms of producing higher quality recycled water.

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Section: Membrane Operation With Varying Phmentioning

confidence: 97%

Treatment of anin situoil sands produced water by polymeric membranes

Hayatbakhsh

Sadrzadeh

Pernitsky

et al. 2015

Desalination and Water Treatment

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“…The models described in Table 4 do provide a common framework that is extensively deployed within membrane filtration [33,55,[124][125][126][127][128][129]. The models were originally intended for dead-end filtration and did not consider flux recovery methods.…”

Section: Structurementioning

confidence: 99%

“…It is these items that will be addressed in this study, whereas membrane material and chemicals can significantly improve membrane filtration performance [11,33,34], but the focus of this review remains control oriented. A series of models will be described and their potential application in process control design will be discussed.…”

mentioning

confidence: 99%

Membrane Fouling for Produced Water Treatment: A Review Study From a Process Control Perspective

Jepsen

Bram

Pedersen

et al. 2018

Water

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The offshore oil and gas industry is experiencing increasing water cuts as the reservoirs mature. The increase in produced water stresses the currently deployed deoiling technologies, resulting in more oil in the discharged water. Deploying membrane filtration to reduce the hydrocarbon concentration inherits additional complications related to fouling of the membranes: A process where the accumulation of material within and on the membrane surface adds additional flow resistance. This paper reviews and analyses the fouling detection, removal, prevention, dynamical and static modeling, with emphasis on how the membrane process can be manipulated from a process control perspective. The majority of the models rely on static descriptions or are limited to a narrow range of operating conditions which limits the usability of the models. This paper concludes that although the membrane filtration has been successfully applied and matured in many other industrial areas, challenges regarding cost-effective mitigation of fouling in the offshore deoiling applications, still exist. Fouling-based modeling combined with online parameter identification could potentially expand the operating range of the models and facilitate advanced control design to address transient performance and scheduling of fouling removal methods, resulting in cost-effective operation of membrane filtration systems. With the benefits of membrane filtration, it is predicted that membrane technology will be incorporated in produced water treatment, if the zero-discharge policies are enforced globally.

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“…Not only are high concentrations of dissolved inorganic species (such as silica and other dissolved solids) present as a result of the high steam temperatures, but a considerable amount of small oil droplets (see Figure 3a) and dissolved organic matter can also accumulate. For different reasons, these species cause problems for recycling as boiler feed water (resulting in silicate scale formation) [137] and water disposal (owing to the toxicity of the organic species present) [52,138,139]. Control of silicate boiler scale formation is therefore a necessity, which currently employs different softening strategies [140].…”

Section: Composition Of Produced Watermentioning

confidence: 99%

Interfacial Chemistry in Steam-Based Thermal Recovery of Oil Sands Bitumen with Emphasis on Steam-Assisted Gravity Drainage and the Role of Chemical Additives

Taylor

2018

Colloids and Interfaces

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In this article, the importance of colloids and interfaces in thermal heavy oil or bitumen extraction methods is reviewed, with particular relevance to oil sands. It begins with a brief introduction to the chemical composition and surface chemistry of oil sands, as well as steam-based thermal recovery methods. This is followed by the specific consideration of steam-assisted gravity drainage (SAGD) from the perspective of the interfacial chemistry involved and factors responsible for the displacement of bitumen from reservoir mineral surfaces. Finally, the roles of the different chemical additives proposed to improve thermal recovery are considered in terms of their contributions to recovery mechanisms from interfacial and colloidal perspectives. Where appropriate, unpublished results from the author's laboratory have been used to illustrate the discussions.

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Characterization of Boiler Blowdown Water from Steam-Assisted Gravity Drainage and Silica–Organic Coprecipitation during Acidification and Ultrafiltration

Cited by 41 publications

References 52 publications

Treatment of anin situoil sands produced water by polymeric membranes

Treatment of anin situoil sands produced water by polymeric membranes

Membrane Fouling for Produced Water Treatment: A Review Study From a Process Control Perspective

Interfacial Chemistry in Steam-Based Thermal Recovery of Oil Sands Bitumen with Emphasis on Steam-Assisted Gravity Drainage and the Role of Chemical Additives

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