Combination of forward osmosis (FO) process with coagulation/flocculation (CF) for potential treatment of textile wastewater

Han, Gang; Liang, Chunjun; Chung, Tai‐Shung; Weber, Martin; Staudt, Claudia; Maletzko, Christian

doi:10.1016/j.watres.2016.01.031

Cited by 156 publications

(63 citation statements)

References 38 publications

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“…Meanwhile, the Fenton process was often used in combination with the flocculation process in the practical engineering application, due to Fe 2+ /Fe 3+ used as a catalyst was also a kind of coagulant in the flocculation process . A large number of colloidal particles generated in the Fenton process should be removed before the wastewater flows into the subsequent processing unit, while the flocculation process was an effective and low‐cost unit for particle separation .…”

Section: Introductionmentioning

confidence: 99%

Advanced treatment of actual textile dye wastewater by Fenton‐flocculation process

Xiao

Sun

et al. 2016

Can J Chem Eng

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To improve the performance of actual textile dye wastewater treatment, an advanced treatment combining the Fenton and flocculation processes was developed. The parameters affecting decolorization in the Fenton-flocculation process, including initial pH, H 2 O 2 dosage, Fe 2þ dosage, reaction temperature, reaction time, and flocculant dosage, were examined. With the optimal Fenton-flocculation condition parameters, more than 95 % COD removal, 99 % colour removal, and 99 % turbidity removal were obtained. UV-visible spectra of raw water and supernatant were further obtained after the Fenton-flocculation process, and results demonstrated that the chromophoric groups and the conjugated system in the dye molecular structure were destroyed. All these results confirmed that the Fenton-flocculation process was a favourable and effective post-treatment method for actual textile dye wastewater.

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Section: Introductionmentioning

confidence: 99%

Advanced treatment of actual textile dye wastewater by Fenton‐flocculation process

Xiao

Sun

et al. 2016

Can J Chem Eng

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“…Coagulation‐flocculation (CF) is the most common wastewater treatment method and is the primary one used in sequenced methods of various wastewater treatment . CF results are represented by COD, TSS, pH, conductivity, colour appearance, and other parameters . Flocculant complemented coagulants work, but they still result in sludge.…”

Section: Resultsmentioning

confidence: 99%

The enhancement of black liquor treatment by applying a natural flocculant and converting its sludge to a high‐benefit product

Amriani

Bani²,

Muryanto

et al. 2018

Can J Chem Eng

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Black liquor (BL) as lignocellulosic-based industrial wastewater is largely attained from a chemical pretreatment process. When treated with the commonly used coagulant polyaluminum chloride (PACl), BL was decolourized but its pH decreased drastically from 13 to 4-5. Chitosan as a natural flocculant was added to the BL treatment process to support the PACl. The combination of coagulant-flocculant (PACl-Chitosan) effectively generated sludge, rejuvenated the treated BL pH level to neutral, and decolourized and reduced several parameters required for the treated BL disposal. To establish a sustainable recycling process and enhance the BL treatment, the generated sludge as a potential source was recovered and converted to a carbonaceous adsorbent (CA) by applying a two-stage carbonization process, heat and steam carbonization, during which the temperature and time in the first stage of the heat-carbonization process differ. The first BL sludge-based CA (BLS-CA 1) is produced by employing the first stage heating at 575 8C for 180 min while the second black liquor sludge-based CA (BLS-CA 2) is produced by employing the first stage heating at 450 8C for 60 min. Both CAs were able to adsorb about 99 % methylene blue (MB) at MB concentration 100 mg/L for 16 h though they have smaller surface areas than commercially activated carbon, which is only able to adsorb about 70 % MB at the same concentration and adsorption time. This study demonstrates a potential way to reduce the emerging problem from the generated sludge through a sustainable recycling process as well as BL treatment.

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“…59 Remarkable reverse fouling behaviour has been observed where the Jw of the fouled membrane was fully restored to the initial value by physical flushing without using any chemicals. 60 Water flux declines slightly by 10% after a 12 h oil/water test under the PRO mode and water flux of the fouled membrane can be restored to 97% by simple water rinse. 61 Table 2.…”

Section: Remarksmentioning

confidence: 96%

Forward Osmosis in Wastewater Treatment Processes

Korenak¹,

Basu²,

Balakrishnan³

et al. 2017

ACSi

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In recent years, membrane technology has been widely used in wastewater treatment and water purification. Membrane technology is simple to operate and produces very high quality water for human consumption and industrial purposes. One of the promising technologies for water and wastewater treatment is the application of forward osmosis. Essentially, forward osmosis is a process in which water is driven through a semipermeable membrane from a feed solution to a draw solution due to the osmotic pressure gradient across the membrane. The immediate advantage over existing pressure driven membrane technologies is that the forward osmosis process per se eliminates the need for operation with high hydraulic pressure and forward osmosis has low fouling tendency. Hence, it provides an opportunity for saving energy and membrane replacement cost. However, there are many limitations that still need to be addressed. Here we briefly review some of the applications within water purification and new developments in forward osmosis membrane fabrication.

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Combination of forward osmosis (FO) process with coagulation/flocculation (CF) for potential treatment of textile wastewater

Cited by 156 publications

References 38 publications

Advanced treatment of actual textile dye wastewater by Fenton‐flocculation process

Advanced treatment of actual textile dye wastewater by Fenton‐flocculation process

The enhancement of black liquor treatment by applying a natural flocculant and converting its sludge to a high‐benefit product

Forward Osmosis in Wastewater Treatment Processes

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