Ceramic micro/ultra‐filtration of low‐concentration ultrafine sulfur in desulfurization wastewater

Yin, Naiqiang; Wang, Ke; Zhong, Zhaoxiang; Low, Ze Xian; Xing, Weihong

doi:10.1002/jctb.5053

Cited by 7 publications

(4 citation statements)

References 40 publications

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“…Still, they have several drawbacks, including generating secondary pollutants, having high maintenance costs, and being ineffective in separating emulsion [21,22]. As compared to these methods, membrane technology is one of the most effective among these processes, as it can be broadly used for the handling of oily wastewater due to advantages such as its high separation performance, more straightforward process, low energy consumption, incredibly compact model and limited space requirements [22,23]. With these superior advantages, membrane filtration has emerged as a promising alternative for oily wastewater treatment.…”

Section: Overview On Oily Wastewatermentioning

confidence: 99%

Recent Mitigation Strategies on Membrane Fouling for Oily Wastewater Treatment

et al. 2021

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The discharge of massive amounts of oily wastewater has become one of the major concerns among the scientific community. Membrane filtration has been one of the most used methods of treating oily wastewater due to its stability, convenience handling, and durability. However, the continuous occurrence of membrane fouling aggravates the membrane’s performance efficiency. Membrane fouling can be defined as the accumulation of various materials in the pores or surface of the membrane that affect the permeate’s quantity and quality. Many aspects of fouling have been reviewed, but recent methods for fouling reduction in oily wastewater have not been explored and discussed sufficiently. This review highlights the mitigation strategies to reduce membrane fouling from oily wastewater. We first review the membrane technology principle for oily wastewater treatment, followed by a discussion on different fouling mechanisms of inorganic fouling, organic fouling, biological fouling, and colloidal fouling for better understanding and prevention of membrane fouling. Recent mitigation strategies to reduce fouling caused by oily wastewater treatment are also discussed.

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Section: Overview On Oily Wastewatermentioning

confidence: 99%

Recent Mitigation Strategies on Membrane Fouling for Oily Wastewater Treatment

et al. 2021

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“…Compared with industrial wastewater with high salinity and high pollution, the FGD wastewater not only has high salt content [13], but also the more prominent problem is that suspended solids (SS) and turbidity in wastewater seriously exceed the standard [14]. High turbidity and high SS have seriously limited the selection of FGD wastewater ZLD process routes.…”

Section: Introductionmentioning

confidence: 99%

Application of Submerged Ultrafiltration in Pretreatment of Flue Gas Desulfurization Wastewater

Zhang¹,

Wang²,

Huang³

et al. 2022

Energy Engineering

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Nowadays, the zero liquid discharge of flue gas desulfurization (FGD) wastewater from coal-fired units has attracted the attention of all countries in the world. The pretreatment methods generally have the problems of high operation cost, small treatment capacity, and poor flexibility. However, the membrane method can avoid the above problems.In the current research, it has not been found that someone directly uses submerged ultrafiltration to pretreat FGD wastewater. Therefore, this paper innovatively proposed to directly use ceramic ultrafiltration membrane to treat FGD wastewater, which can ensure effluent quality and improve the flexibility of the pretreatment system. In this paper, the performance of submerged ultrafiltration membrane for the filtration of FGD wastewater from a power plant was studied to optimize the filtration performance and improve the effluent quality. The effects of operating parameters such as membrane permeate flux, aeration rate and filtration/backwashing time combination on the membrane performance were studied. The results showed that when the filtration/backwashing time combination was 15 min/30 s, with the increased in permeate flux from 55 L/(m 2 •h) to 100 L/(m 2 •h), the steady transmembrane pressure (TMP) increased from 39 kPa to 70 kPa, and the fouling rate increased significantly from 4.5 kPa/h to 7.3 kPa/h; When the aeration rate increased from 10 m 3 /(m 2 •h) to 30 m 3 /(m 2 •h), the membrane pollution was much reduced. Excessive aeration rate cannot further alleviate the membrane pollution, but also brought greater energy consumption; Increasing backwashing time can effectively inhibit the formation of gel layer on the surface of the membrane and prolong the initial stage of low-pressure operation; The rejection of suspended solids (SS) and turbidity of the equipment studied in this paper can reach more than 99% under various working conditions, which can satisfy the water quality requirements of the subsequent steps. The submerged ultrafiltration membrane was suitable for the pretreatment of FGD wastewater because it can ensure the quality of permeate under the premise of long-term operation.

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“…Any research reported the membrane performances for marine scrubbers’ water treatment. Moreover, some studies deal with the usage of membrane technology, mainly with a succession of treatment steps from ultrafiltration (UF) to reverse osmosis (RO) for flue-gas desulfurization onshore [ 34 , 35 , 36 , 37 , 38 ]. In case of ultrafiltration applied to this field, researchers report good, suspended solid removal and, according to Yin et al [ 35 ], UF membrane permeability stabilization is around 130 L h −1 m −2 bar −1 .…”

Section: Introductionmentioning

confidence: 99%

Membrane Separation Used as Treatment of Alkaline Wastewater from a Maritime Scrubber Unit

DROUIN

Parravicini

Nasser³

et al. 2022

Membranes

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Since 1 January 2020, the sulfur content allowed in exhaust gas plume generated by marine vessels decreased to 0.5% m/m. To be compliant, a hybrid scrubber was installed on-board, working in closed loop and generating a high volume of alkaline wastewater. The alkaline water suspension was treated by a silicon carbide multitubular membrane to remove pollutants, and to allow the water discharge into the natural environment. In this paper, membrane filtration behavior was analyzed for the maritime scrubber wastewater. A range of operating parameters were obtained for several feedwater quality-respecting industrial constraints. The objective was an improvement of (I) the water recovery rate, (II) the filtration duration, and (III) the permeate quality. Thus, in high-fouling water, a low permeate flow (60 L h−1 m−2) with frequent backflushing (every 20 min) was used to maintain membrane performance over time. In terms of water quality, the suspended solids and heavy metals were retained at more than 99% and 90%, respectively. Other seawater discharge criteria in terms of suspended solids concentration, pH, and polyaromatic hydrocarbons were validated. The recommended operating conditions from laboratory study at semi-industrial scale were then implemented on a vessel in real navigation conditions with results in agreement with expectations.

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Ceramic micro/ultra‐filtration of low‐concentration ultrafine sulfur in desulfurization wastewater

Cited by 7 publications

References 40 publications

Recent Mitigation Strategies on Membrane Fouling for Oily Wastewater Treatment

Recent Mitigation Strategies on Membrane Fouling for Oily Wastewater Treatment

Application of Submerged Ultrafiltration in Pretreatment of Flue Gas Desulfurization Wastewater

Membrane Separation Used as Treatment of Alkaline Wastewater from a Maritime Scrubber Unit

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