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Article ; Online: Application of ultrafiltration technology in drinking water industry of China

Jinjin Jia / Min Rui / Xiaoxiang Cheng / Heng Liang

Aqua, Vol 72, Iss 12, Pp 2408-

A comprehensive assessment of hybrid membrane processes

2023 Volume 2421

Abstract: Over the last decades, ultrafiltration (UF) has been and will continue to play an important role in the Chinese drinking water industry. The hybrid membrane processes have been emerging as promising alternatives to traditional treatment processes. This ... ...

Abstract	Over the last decades, ultrafiltration (UF) has been and will continue to play an important role in the Chinese drinking water industry. The hybrid membrane processes have been emerging as promising alternatives to traditional treatment processes. This review paper offers a thorough overview of the current status of UF technology in the drinking water industry in China, while also evaluating the landscape of different hybrid membrane processes. The paper conducts statistical analysis on the projects operational between 2004 and 2022; and those currently under construction. This analysis accentuates the evolution of scale and capacity, geographical distribution characteristics, and the driving forces. Furthermore, the characteristics and application scenarios of several hybrid membrane processes are emphatically described, including direct UF, gravity-driven membrane process, coagulation-UF, activated carbon-UF, medium-flow process, long-flow process, and double-membrane process. A granular dissection of UF membrane market distribution follows, including an incisive comparison between submerged and pressurized UF membrane systems. Finally, the potential trajectory of UF in the Chinese drinking water industry is prospected. UF applications have grown significantly in China's drinking water industry, with the dominance of medium- and long-flow membrane processes. UF technology will contribute to future decentralized water supply. HIGHLIGHTS The development of UF full-scale applications in drinking water treatment in China is revisited.; The review provides the geographic distribution of UF DWTPs and driving forces.; The characteristics and application scenarios of four hybrid membrane processes are described.; The UF membrane market distribution is identified.; The insights for the future application of UF technology are highlighted.;
Keywords	drinking water treatment ; full-scale application ; hybrid membrane processes ; market distribution ; ultrafiltration ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
Subject code	660
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	IWA Publishing
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Application of Struvite-MAP Crystallization Reactor for Treating Cattle Manure Anaerobic Digested Slurry

Weijia Gong / Yan Li / Lina Luo / Xinsheng Luo / Xiaoxiang Cheng / Heng Liang

International Journal of Environmental Research and Public Health, Vol 15, Iss 7, p

Nitrogen and Phosphorus Recovery and Crystal Fertilizer Efficiency in Plant Trials

2018 Volume 1397

Abstract: Recycling and reusing the nutrient resources from anaerobic digested slurry is very promising for environmental pollution control and agriculture sustainable development. We focus here on nitrogen and phosphorus recycling in treating cattle manure ... ...

Abstract	Recycling and reusing the nutrient resources from anaerobic digested slurry is very promising for environmental pollution control and agriculture sustainable development. We focus here on nitrogen and phosphorus recycling in treating cattle manure anaerobic digested slurry by a magnesium ammonium phosphate (struvite-MAP) crystallization process and examine the impact of MAP precipitation on plant growth. The MAP crystallization process was studied by a combination of Design-Expert 8.0.6 software, mathematical modeling, and experiments. The influence of Mg/P, N/P and pH on nitrogen (N) and phosphorus (P) recovery was investigated. Then, the fertilizing efficiency of the MAP precipitate on the growth of three vegetables (water spinach (Swamp cabbage), amaranth and Brassica parachinensis) was also evaluated. The results showed that more than 89% of N and 99% of P could be recovered at pH = 10 with molar ratios of Mg/P = 1.6 and N/P = 1.2. Compared with the control pots and potassium chloridepots, the fresh weight, dry weight and average height of swamp cabbage in the MAP pots were obviously enhanced without burning effects. The results showed that MAP precipitation can promote the development of plants, which is promising for its use as a slow-release fertilizer for agricultural production.
Keywords	cattle manure anaerobic digested slurry ; MAP crystallization ; phosphorus recovery ; wastewater treatment ; sustainability ; Medicine ; R
Subject code	580
Language	English
Publishing date	2018-07-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Ultra-low pressure membrane-based bio-purification process for decentralized drinking water supply: Improved permeability and removal performance

Tang, Xiaobin / An Ding / Binghan Xie / Guibai Li / Heng Liang / Jinlong Wang / Xiaoxiang Cheng / Xuewu Zhu / Yuanqing Guo

Chemosphere. 2018 Nov., v. 211

2018

Abstract: Ultra-low pressure gravity-driven membrane (GDM) filtration has been proposed as a cost-efficiency alternative for the decentralized drinking water supply in terms of its simple operation and low energy consumptions, whereas its undesirable removals of ... ...

Abstract	Ultra-low pressure gravity-driven membrane (GDM) filtration has been proposed as a cost-efficiency alternative for the decentralized drinking water supply in terms of its simple operation and low energy consumptions, whereas its undesirable removals of dissolved organic compounds (DOC) and relatively low flux impede its widespread application. In order to improve its filtration performance, filter media (granular activated carbon (GAC), zeolite and bio-ceramsite) was directly coated on the membrane surface to engineer an integrated GDM system. The coating filter layer and bio-cake layer on the membrane surface could engineer a highly porous “multifunctional double layer” structure, which facilitated improvements of stabilized flux by 30%–120% relative to GDM control. Besides, coating filter media to GDM can efficiently combine the complementary performance between filter coat and GDM filtration, and thus the removals of CODMn were improved to 21%, 30% and 70% in bio-ceramsite, zeolite and GAC coated systems. Furthermore, the integrated GDM systems conferred much higher potentials in resisting the shock load of contaminants (e.g. organics, ammonia, iron and manganese) compared to GDM control. In addition, a low-aeration cleaning in presence of filter media scouring could efficiently improve the flux recovery from 35% to 50–94%, while the membrane integrity test indicated that such filter media scouring would not damage the membrane surface. Overall, these findings can hopefully spark improvements of both permeability and permeate quality in GDM filtration and bring relevant benefits to the applications of GDM technologies for decentralized drinking water supply.
Keywords	activated carbon ; ammonia ; cleaning ; coatings ; cost effectiveness ; drinking water ; energy ; filtration ; iron ; manganese ; organic compounds ; permeability ; water supply ; zeolites
Language	English
Dates of publication	2018-11
Size	p. 784-793.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2018.07.183
Database	NAL-Catalogue (AGRICOLA)

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Article: Free-standing hierarchical α-MnO2@CuO membrane for catalytic filtration degradation of organic pollutants

Luo, Xinsheng / Heng Liang / Fangshu Qu / An Ding / Xiaoxiang Cheng / Chuyang Y. Tang / Guibai Li

Chemosphere. 2018 June, v. 200

2018

Abstract: Catalytic membrane, due to its compact reactor assembling, high catalytic performance as well as low energy consumption, has proved to be more attractive for wastewater treatment. In this work, a free-standing α-MnO2@CuO membrane with hierarchical ... ...

Abstract	Catalytic membrane, due to its compact reactor assembling, high catalytic performance as well as low energy consumption, has proved to be more attractive for wastewater treatment. In this work, a free-standing α-MnO2@CuO membrane with hierarchical nanostructures was prepared and evaluated as the catalytic membrane to generate radicals from peroxymonosulfate (PMS) for the oxidative degradation of organic dyes in aqueous solution. Benefiting from the high mass transport efficiency and the hierarchical nanostructures, a superior catalytic activity of the membrane was observed for organic dyes degradation. As a typical organic dye, more than 99% of methylene blue (MB) was degraded within 0.23 s using dead-end filtration cell. The effects of flow rate, PMS concentration and buffer solution on MB degradation were further investigated. Besides MB, the catalytic membrane also showed excellent performance for the removal of other dyes, such as congo red, methyl orange, rhodamine B, acid chrome blue K and malachite green. Moreover, the mechanism study indicated that OH and SO4- generated from the interaction between PMS and Mn/Cu species with different oxidation states mainly accounted for the dyes degradation. The catalytic filtration process using α-MnO2@CuO catalytic membrane could provide a novel method for wastewater purification with high efficiency and low energy consumption.
Keywords	aqueous solutions ; catalytic activity ; copper ; energy ; filtration ; free radicals ; malachite green ; manganese ; mass transfer ; methodology ; methyl orange ; methylene blue ; nanomaterials ; oxidation ; pollutants ; wastewater ; wastewater treatment
Language	English
Dates of publication	2018-06
Size	p. 237-247.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2018.02.113
Database	NAL-Catalogue (AGRICOLA)

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Article: Microcystis aeruginosa-laden surface water treatment using ultrafiltration: Membrane fouling, cell integrity and extracellular organic matter rejection

Liu, Bin / Bart Van der Bruggen / Fangshu Qu / Guibai Li / Guoren Xu / Heng Liang / Huarong Yu / Xiaoxiang Cheng

Water research. 2017 Apr. 01, v. 112

2017

Abstract: Despite its superb separation performance, ultrafiltration (UF) still faces challenges in treating the Microcystis aeruginosa-laden water of lakes or reservoirs, due to membrane fouling and poor rejection of soluble organics. In this work, to better ... ...

Abstract	Despite its superb separation performance, ultrafiltration (UF) still faces challenges in treating the Microcystis aeruginosa-laden water of lakes or reservoirs, due to membrane fouling and poor rejection of soluble organics. In this work, to better understand the mechanisms of membrane fouling, cell breakage and organic rejection and their mutual influence, a comparative UF experiment was conducted under a variety of transmembrane pressures (TMPs, 50â250Â kPa) with lab-cultured Microcystis aeruginosa. Membrane fouling was characterized with respect to flux decline and fouling reversibility, and cell breakage during UF filtration was evaluated using a flow cytometer. Moreover, the rejection of extracellular organic matter (EOM) by UF was investigated with respect to the dissolved organic carbon (DOC), ultraviolet absorbance at 254Â nm (UV254) and microcystin-LR (MCLR). The results indicated that the accumulation of Microcystis cells and EOM on the membrane surface caused serious reversible fouling that substantially aggravated with the increasing TMP and was successively governed by pore blocking and cake filtration. The cell breakage during filtration was less than 5% and mainly occurred in the cake layer due to hydraulic shear, but the breakage did not substantially vary with increasing TMP. EOM removal by UF ranged from 40% to 70% (in terms of DOC removal), and the removal performance increased with the reversible resistance, implying a trade-off between organic removal and permeability. Regarding soluble and small organics such as MCLR, a higher degree of removal was also found at higher TMP, despite of some variations over the duration of the filtration tests, and the cake layer retention proved to be the principle removal mechanism, especially during steady filtration stages.
Keywords	absorbance ; dissolved organic carbon ; flow cytometry ; fouling ; lakes ; microcystin-LR ; Microcystis aeruginosa ; permeability ; surface water ; ultrafiltration ; water treatment
Language	English
Dates of publication	2017-0401
Size	p. 83-92.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	202613-2
ISSN	1879-2448 ; 0043-1354
ISSN (online)	1879-2448
ISSN	0043-1354
DOI	10.1016/j.watres.2017.01.033
Database	NAL-Catalogue (AGRICOLA)

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Article: Fluorescent natural organic matter responsible for ultrafiltration membrane fouling: Fate, contributions and fouling mechanisms

Wang, Hui / An Ding / Fangshu Qu / Guibai Li / Heng Liang / Langming Bai / Shaodong Guo / Xiaoxiang Cheng / Zhendong Gan

Chemosphere. 2017,

2017

Abstract: Membrane fouling has been a main obstacle to the success of ultrafiltration (UF) technology. Recently, fluorescent natural organic matter (FNOM), including humic-like substances (HS) and protein-like substances, has been recognized as substances ... ...

Abstract	Membrane fouling has been a main obstacle to the success of ultrafiltration (UF) technology. Recently, fluorescent natural organic matter (FNOM), including humic-like substances (HS) and protein-like substances, has been recognized as substances responsible for membrane fouling. In this study, the matrix of FNOM in natural river water was substantially modified by combined coagulation and powdered activated carbon adsorption to enhance the diversity of the FNOM matrix. Fluorescence excitation emission matrix spectroscopy was employed to characterize FNOM components during the UF process. The correlations between FNOM components of the feedwater and membrane fouling were evaluated for the initial period and long-term operation. Reliable correlations of the maximum fluorescence intensity of HS with initial membrane fouling indicated that HS were major foulants in the initial period. Furthermore, the protein-like component exhibited significant correlation with the concentration effect fouling (R2Â =Â 0.6131) and with irreversible fouling (R2Â =Â 0.8711). We found that the fouling mechanism changed from pore obstruction to a protein concentration polarization layer followed by protein cake layer filtration. Total fouling of the UF membrane over long-term operation was alleviated with powdered activated carbon (PAC) adsorption; however, the mitigation of irreversible fouling was dependent on whether PAC adsorbed protein-like substances.
Keywords	activated carbon ; adsorption ; coagulation ; fluorescence ; fouling ; organic matter ; river water ; spectroscopy ; ultrafiltration
Language	English
Size	p. .
Publishing place	Elsevier Ltd
Document type	Article
Note	Pre-press version
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2017.04.148
Database	NAL-Catalogue (AGRICOLA)

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Article: Effect of operation parameters on the flux stabilization of gravity-driven membrane (GDM) filtration system for decentralized water supply

Tang, Xiaobin / An Ding / Fangshu Qu / Ruibao Jia / Haiqing Chang / Xiaoxiang Cheng / Bin Liu / Guibai Li / Heng Liang

Environmental science and pollution research international. 2016 Aug., v. 23, no. 16

2016

Abstract: A pilot-scale gravity-driven membrane (GDM) filtration system under low gravitational pressure without any pre-treatment, backwash, flushing, or chemical cleaning was carried out to investigate the effect of operation parameters (including operation ... ...

Abstract	A pilot-scale gravity-driven membrane (GDM) filtration system under low gravitational pressure without any pre-treatment, backwash, flushing, or chemical cleaning was carried out to investigate the effect of operation parameters (including operation pressure, aeration mode, and intermittent filtration) on the effluent quality and permeability development. The results revealed that GDM system exhibited an efficient performance for the removal of suspended substances and organic compounds. The stabilization of flux occurred and the average values of stable flux were 6.6, 8.1, and 8.6Â Lmâ»Â²Â hâ»Â¹ for pressures of 65, 120, and 200Â mbar, respectively. In contrast, flux stabilization was not observed under continuous and intermittent aeration conditions. However, aeration (especially continuous aeration) was effective to improve flux and alleviate membrane fouling during 1-month operation. Moreover, intermittent filtration would influence the stabilization of permeate flux, resulting in a higher stable flux (ranging from 6 to 13Â Lmâ»Â²Â hâ»Â¹). The stable flux significantly improved with the increase of intermittent period. Additionally, GDM systems exhibited an efficient recovery of flux after simple physical cleaning and the analyses of resistance reversibility demonstrated that most of the total resistance was hydraulic reversible resistance (50â75Â %). Therefore, it is expected that the results of this study can develop strategies to increase membrane permeability and reduce energy consumption in GDM systems for decentralized water supply.
Keywords	aeration ; cleaning ; energy ; filtration ; fouling ; membrane permeability ; organic compounds ; organic matter ; water supply
Language	English
Dates of publication	2016-08
Size	p. 16771-16780.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-016-6857-0
Database	NAL-Catalogue (AGRICOLA)

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Article: A low pressure gravity-driven membrane filtration (GDM) system for rainwater recycling: Flux stabilization and removal performance

Ding, An / Dachao Lin / Guibai Li / Heng Liang / Hui Wang / Jinlong Wang / Langming Bai / Xiaobin Tang / Xiaoxiang Cheng

Chemosphere. 2016,

2016

Abstract: Rainwater is a nature resource, which can be widely used for non-potable and potable applications in water scared countries after appropriate treatment. Gravity-driven membrane filtration (GDM) process is a promising technology for decentralized ... ...

Abstract	Rainwater is a nature resource, which can be widely used for non-potable and potable applications in water scared countries after appropriate treatment. Gravity-driven membrane filtration (GDM) process is a promising technology for decentralized rainwater treatment due to no backwashing, flushing and chemical cleaning. In this study, we established a single lab-scale GDM system for the stored rainwater (simulative cellar rainwater) treatment with two months operation, and a stored tap water was used as a compared system to evaluate the permeability and organics removal performance. Results showed that GDM exhibited a good performance for bacteria and turbidity removals, but the removal performance of DOC was undesirable due to the low rejection of low molecular-weight fulvic. Additionally, the permeate flux reached stable with the value of 6â6.5Â L/m2h during 60 days operation in the rainwater system, however, the tap water system stabilized only at 4Â L/m2h. Hydraulically reversible resistance accounted for large proportions (90%) of the total resistance, which indicated that the flux could be recovered by simple physical flushing. The bio-fouling layer adhered on the membrane surface was characterized at the end of the filtration experiment. Higher bio-activity with lower EPS (polysaccharides and proteins) contents of the fouling layer were found in the rainwater system compared with the control system, which was the main reason for the higher flux. These results show that rainwater can be treated in a single GDM process with low maintenance, which makes the process suitable for decentralized water supply.
Keywords	bacteria ; biofouling ; cleaning ; filtration ; molecular weight ; permeability ; polysaccharides ; proteins ; rain ; tap water ; turbidity ; water supply
Language	English
Size	p. .
Publishing place	Elsevier Ltd
Document type	Article
Note	Pre-press version
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2016.12.111
Database	NAL-Catalogue (AGRICOLA)

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Article: Microcystis aeruginosa-laden water treatment using enhanced coagulation by persulfate/Fe(II), ozone and permanganate: Comparison of the simultaneous and successive oxidant dosing strategy

Liu, Bin / Fangshu Qu / Wei Chen / Heng Liang / Tianyu Wang / Xiaoxiang Cheng / Huarong Yu / Guibai Li / Bart Van der Bruggen

Water research. 2017 Nov. 15, v. 125

2017

Abstract: In this study, the application of enhanced coagulation with persulfate/Fe(II), permanganate and ozone for Microcystis-laden water treatment was investigated. Two oxidant dosage strategies were compared in terms of the organic removal performance: a ... ...

Abstract	In this study, the application of enhanced coagulation with persulfate/Fe(II), permanganate and ozone for Microcystis-laden water treatment was investigated. Two oxidant dosage strategies were compared in terms of the organic removal performance: a simultaneous dosing strategy (SiDS) and a successive dosing strategy (SuDS). To optimize the oxidant species, oxidant doses and oxidant dosage strategy, the zeta potential, floc size and dimension fraction, potassium release and organic removal efficiency during the coagulation of algae-laden water were systematically investigated and comprehensively discussed. Ozonation causes most severe cell lysis and reduces organic removal efficiency because it releases intracellular organics. Moreover, ozonation can cause the release of odor compounds such as 2-methylisoborneol (2-MIB) and geosmin (GSM). With increasing doses, the performance of pollutant removal by coagulation enhanced by persulfate/Fe(II) or permanganate did not noticeably improve, which suggests that a low dosage of persulfate/Fe(II) and permanganate is the optimal strategy to enhance coagulation of Microcystis-laden water. The SiDS performs better than the SuDS because more Microcystis cell lysis occurs and less DOC is removed when oxidants are added before the coagulants.
Keywords	2-methylisoborneol ; Microcystis ; coagulants ; coagulation ; geosmin ; iron ; odor compounds ; oxidants ; ozonation ; ozone ; pollutants ; potassium ; water treatment ; zeta potential
Language	English
Dates of publication	2017-1115
Size	p. 72-80.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	202613-2
ISSN	1879-2448 ; 0043-1354
ISSN (online)	1879-2448
ISSN	0043-1354
DOI	10.1016/j.watres.2017.08.035
Database	NAL-Catalogue (AGRICOLA)

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