Reverse Osmosis with Intermediate Chemical Demineralization: Scale Inhibitor Selection, Degradation, and Seeded Precipitation

Two-stage reverse osmosis (RO) processes with intermediate concentrate demineralization (ICD) provide an efficient strategy to treat brines with high CaSO4 contents and reduce concentrate discharge. In this paper, an SRO concentrate is treated using ICD to remove CaSO4 and then mixed with a PRO concentrate for further desalination in SRO, thereby reducing the discharge of the concentrate. We investigate the selection and degradation of scale inhibitors, as well as seeded precipitation in the two-stage RO process with ICD, to achieve a high water recovery rate. A scale inhibitor is added to restrain CaSO4 crystallization on the membrane surface, and the optimized scale inhibitor, RO-400, is found to inhibit calcium sulfate scaling effectively across a wide range of the saturation index of gypsum (SIg) from 2.3 to 6. Under the optimized parameters of 40 W UV light and 70 mg/L H2O2, UV/H2O2 can degrade RO-400 completely in 15 min to destroy the scale inhibitor in the SRO concentrate. After scale inhibitor degradation, the SRO concentrate is desaturated by seeded precipitation, and the reaction degree of CaSO4 reaches 97.12%, leading to a concentrate with a low SIg (1.07) for cyclic desalination. Three UVD-GSP cycle tests show that the reused gypsum seeds can also ensure the effect of the CaSO4 precipitation process. This paper provides a combined UVD-GSP strategy in two-stage RO processes to improve the water recovery rate for CaSO4-contained concentrate.

[1]  Isam Y. Qudsieh,et al.  Photodegradation of Methylene Blue Using a UV/H2O2 Irradiation System , 2024, Water.

[2]  Y. Lu,et al.  Antiscalant and its deactivation in zero/minimized liquid discharge (ZLD/MLD) application in the mining sector – Opportunities, challenges and prospective , 2023, Minerals Engineering.

[3]  P. Xu,et al.  An Alternating, Current-Induced Electromagnetic Field for Membrane Fouling and Scaling Control during Desalination of Secondary Effluent from Municipal Wastewater , 2023, Water.

[4]  Chun-bao Sun,et al.  Combing Seeding Crystallization with Flotation for Recovery of Fluorine from Wastewater: Experimental and Molecular Simulation Studies , 2023, Molecules.

[5]  Yaqian Liu,et al.  Enhanced Anti-Biofouling Properties of BWRO Membranes via the Deposition of Poly (Catechol/Polyamine) and Ag Nanoparticles , 2023, Membranes.

[6]  H. Zhao,et al.  Study on the Treatment of Refined Sugar Wastewater by Electrodialysis Coupled with Upflow Anaerobic Sludge Blanket and Membrane Bioreactor , 2023, Membranes.

[7]  M. Nakajima,et al.  Effect of Surfactants on Reverse Osmosis Membrane Performance , 2023, Separations.

[8]  A. Chaudhuri,et al.  Numerical modelling and analysis of concentration polarization and scaling of gypsum over RO membrane during seawater desalination , 2023, Chemical Engineering Research and Design.

[9]  S. Abramchuk,et al.  Preparation of Biocidal Nanocomposites in X-ray Irradiated Interpolyelectolyte Complexes of Polyacrylic Acid and Polyethylenimine with Ag-Ions , 2022, Polymers.

[10]  Ngai Yin Yip,et al.  Drivers, challenges, and emerging technologies for desalination of high-salinity brines: A critical review , 2022, Desalination.

[11]  Jung-hua Wu,et al.  Municipal-to-Industrial Water Reuse via Multi-Stage and Multi-Pass Reverse Osmosis Systems: A Step from Water Scarcity towards Sustainable Development , 2022, Water.

[12]  K. Saeed,et al.  Review on Methylene Blue: Its Properties, Uses, Toxicity and Photodegradation , 2022, Water.

[13]  Xuan He,et al.  Treatment of reverse osmosis membrane by sodium hypochlorite and alcohols for enhanced performance using the swelling-fastening effect. , 2021, Chemosphere.

[14]  Troy N. Green,et al.  Reliable Sea Water Ro Operation with High Water Recovery and No-Chlorine/No-Sbs Dosing in Arabian Gulf, Saudi Arabia , 2021, Membranes.

[15]  Y. Cohen,et al.  Desupersaturation of RO concentrate and gypsum removal via seeded precipitation in a fluidized bed crystallizer. , 2020, Water research.

[16]  Wei Chen,et al.  Antiscalants in RO membrane scaling control. , 2020, Water research.

[17]  Z. Geng,et al.  The Influence of Residual Coagulant Al on the Biofilm EPS and Membrane Fouling Potential in Wastewater Reclamation , 2020, Water.

[18]  A. Marszałek,et al.  Effect of Photooxidation on Nanofiltration Membrane Fouling During Wastewater Treatment from the Confectionery Industry , 2020, Water.

[19]  R. Semiat,et al.  Intermediate concentrate demineralization techniques for enhanced brackish water reverse osmosis water recovery – A review , 2019, Desalination.

[20]  V. Innocenzi,et al.  Reduction of Fouling and Scaling by Calcium Ions on an UF Membrane Surface for an Enhanced Water Pre-Treatment , 2019, Water.

[21]  Fang Zhao,et al.  Using Classical EDTA Titrations To Measure Calcium and Magnesium in Intravenous Fluid Bags , 2018, Journal of Chemical Education.

[22]  Aimin Li,et al.  Evaluation of the structural morphology of starch-graft-poly(acrylic acid) on its scale-inhibition efficiency. , 2018, Water research.

[23]  Jie Liu,et al.  Experimental study on seeded precipitation assisted reverse osmosis for industrial wastewater reuse , 2017 .

[24]  Shaopeng Zhang,et al.  Scale inhibition performance and mechanism of sulfamic/amino acids modified polyaspartic acid against calcium sulfate , 2017 .

[25]  Adewale Giwa,et al.  Brine management methods: Recent innovations and current status , 2017 .

[26]  Lihua Xu,et al.  Synthesis of modified polyaspartic acid and evaluation of its scale inhibition and dispersion capacity , 2015 .

[27]  Yongji Zhang,et al.  Inactivation of Bacillus subtilis Spores Using Various Combinations of Ultraviolet Treatment with Addition of Hydrogen Peroxide , 2014, Photochemistry and photobiology.

[28]  Xinyun Zhou,et al.  Synthesis and application of terpolymer scale inhibitor in the presence of β-cyclodextrins , 2013 .

[29]  F. Rahman Calcium sulfate precipitation studies with scale inhibitors for reverse osmosis desalination , 2013 .

[30]  Y. Cohen,et al.  Antiscalant removal in accelerated desupersaturation of RO concentrate via chemically-enhanced seeded precipitation (CESP). , 2012, Water research.

[31]  D. Dionysiou,et al.  Efficient removal of microcystin-LR by UV-C/H₂O₂ in synthetic and natural water samples. , 2012, Water research.

[32]  Yalei Zhang,et al.  Degradation of Bezafibrate with UV/H2O2 in Surface Water and Wastewater Treatment Plant Effluent , 2012 .

[33]  Yoram Cohen,et al.  Accelerated desupersaturation of reverse osmosis concentrate by chemically-enhanced seeded precipitation. , 2010 .

[34]  P. Moulin,et al.  The effect of antiscalant addition on calcium carbonate precipitation for a simplified synthetic brackish water reverse osmosis concentrate. , 2010, Water research.

[35]  Philippe Moulin,et al.  Effect of antiscalants on precipitation of an RO concentrate: metals precipitated and particle characteristics for several water compositions. , 2010, Water research.

[36]  R. Semiat,et al.  Desupersaturation of RO Concentrates by Addition of Coagulant and Surfactant , 2007 .

[37]  Yoram Cohen,et al.  High-recovery reverse osmosis desalination using intermediate chemical demineralization , 2007 .

[38]  Haizhou Liu,et al.  Treatment of Brackish Water Inland Desalination Brine via Antiscalant Removal Using Persulfate Photolysis , 2023, Environmental Science: Water Research & Technology.