Urea removal in reclaimed water used for ultrapure water production by spent coffee biochar/granular activated carbon activating peroxymonosulfate and peroxydisulfate

2022 ◽  
Vol 343 ◽  
pp. 126062
Author(s):  
Xinbo Zhang ◽  
Yuanying Yang ◽  
Huu Hao Ngo ◽  
Wenshan Guo ◽  
Fengxia Sun ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Reclaimed Water ◽  
Granular Activated Carbon ◽  
Water Production ◽  
Ultrapure Water

scholarly journals Removal of organochlorine pesticides from water using virgin and regenerated granular activated carbon

2010 ◽  
Vol 75 (4) ◽  
pp. 565-573 ◽  
Author(s):  
Mirjana Ninkovic ◽  
Rada Petrovic ◽  
Mila Lausevic
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Breakthrough Curves ◽  
Water Production ◽  
Saturation Point ◽  
Chlorinated Pesticides ◽  
Halogenated Aromatic Hydrocarbons ◽  
Adsorption Capacities ◽  
Public Water Systems ◽  
Derivatives Of

Public water systems use granular activated carbon in order to eliminate pesticides. After saturation, the used activated carbon is regenerated and reused in order to reduce the costs of water production and minimize waste. In this study, the adsorption of 10 different chlorinated pesticides from water using columns packed with commercial virgin and regenerated granular activated carbon was simulated in order to compare their adsorption capacities for different chlorinated pesticides. The breakthrough curves showed that chlorinated pesticides from the group of hexachlorocyclohexane (HCH) were poorly adsorbed, followed by cyclodiens as averagely adsorbed and the derivatives of halogenated aromatic hydrocarbons (DDT) as strongly absorbed. However, the adsorption capacity of regenerated granular activated carbon was considerably lower for tested pesticides compared to the virgin granular carbon. In addition, rinsing of the pesticides after the saturation point is a far more efficient process on regenerated carbon.

scholarly journals Removal of bromide and bromate from drinking water using granular activated carbon

2014 ◽  
Vol 13 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Yong-qing Zhang ◽  
Qing-ping Wu ◽  
Ju-mei Zhang ◽  
Xiu-hua Yang
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Contact Time ◽  
Mineral Water ◽  
Granular Activated Carbon ◽  
Pilot Scale ◽  
Ultrapure Water ◽  
Treated Water ◽  
Bench Scale ◽  
Reduction Efficiency

Granular activated carbon (GAC) was used to remove bromide (Br−) and bromate (BrO3−) from drinking water in both bench- and pilot-scale experiments. The present study aims to minimize BrO3− formation and eliminate BrO3− generated during the ozonation of drinking water, particularly in packaged drinking water. Results show that the Br− and BrO3− levels in GAC-treated water decreased in both bench- and pilot-scale experiments. In the bench-scale experiments, when the empty bed contact time (EBCT) was 5 min, the highest reduction rates of Br− in the mineral and ultrapure water were found to be 74.9% and 91.2%, respectively, and those of BrO3− were 94.4% and 98.8%, respectively. The GAC capacity for Br− and BrO3− removal increased with the increase in EBCT. Reduction efficiency was better in ultrapure water than in mineral water. In the pilot-scale experiments, the minimum reduction rates of Br− and BrO3− were 38.5% and 73.2%, respectively.

scholarly journals An innovative treatment concept for future drinking water production: fluidized ion exchange – ultrafiltration – nanofiltration – granular activated carbon filtration

2009 ◽  
Vol 2 (2) ◽  
pp. 41-47 ◽  
Author(s):  
◽  
S. G. J. Heijman ◽  
J. Q. J. C. Verberk ◽  
J. C. van Dijk
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Ion Exchange ◽  
Granular Activated Carbon ◽  
Feed Water ◽  
Water Production ◽  
Treatment Concept ◽  
Drinking Water Production ◽  
Carbon Filtration ◽  
Micro Pollutants

Abstract. A new treatment concept for drinking water production from surface water has been investigated on a pilot scale. The treatment concept consists of fluidized ion exchange (FIEX), ultrafiltration (UF), nanofiltration (NF), and granular activated carbon filtration (GAC). The FIEX process removed calcium and other divalent cations; the UF membrane removed particles and micro-organisms; and the NF membrane and GAC removed natural organic matter (NOM) and micro-pollutants. This study focused on the prevention of fouling of the UF and scaling of the NF and investigated the overall removal of micro-pollutants by the treatment concept. The results of the experiments showed that in 14 days of continuous operation at a flux of 65 l/h m2 the UF performance was stable with the FIEX pre-treated feed water without the aid of a coagulant. The scaling of the NF was also not observed even at 97% recovery. Different micro-pollutants were spiked in the NF feed water and their concentrations in the effluent of NF and GAC were measured. The combination of NF and GAC removed most of the micro-pollutants successfully, except for the very polar substances with a molecular weight lower than 100 Daltons.

Characterising biofilm development on granular activated carbon used for drinking water production

2013 ◽  
Vol 47 (3) ◽  
pp. 1101-1110 ◽  
Author(s):  
Oriol Gibert ◽  
Benoît Lefèvre ◽  
Marc Fernández ◽  
Xavier Bernat ◽  
Miquel Paraira ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Water Production ◽  
Drinking Water Production ◽  
Biofilm Development

Wastewater treatment and recycle from a semiconductor industry: A demo-plant study

2019 ◽  
Vol 14 (2) ◽  
pp. 371-379 ◽  
Author(s):  
Chin Yee Eng ◽  
Dongning Yan ◽  
Nipuna Withanage ◽  
Qiyi Liang ◽  
Yan Zhou
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Industrial Wastewater ◽  
Cooling Tower ◽  
Semiconductor Industry ◽  
Reclaimed Water ◽  
Ultrapure Water ◽  
Activated Carbon Filter ◽  
Carbon Filter

Abstract The objective of this study was to establish a demo-scale plant with 1,000 cubic metres per day (CMD) capacity to recycle industrial wastewater from a semiconductor industry. In this study, two wastewater streams from continuous electrodeionization (CEDI) and local scrubber (LS)/controlled decomposition and oxidation (CDO) with flow rate of 1,335 CMD and 1,012 CMD respectively were chosen to be recycled. For the CEDI reject reclaim system, boron selective resin (BSR) and activated carbon filter (ACF) were utilized to remove boron and total organic carbon (TOC) respectively. The water quality was good enough to be used as ultrapure water (UPW) supply. For the CDO reclaim system, the combination of ACF + ultrafiltration (UF) + reverse osmosis (RO) under high pH condition was implemented to recycle the local scrubber wastewater (LSW) for cooling tower top up. Product water from both treatment systems was able to meet the target water specifications. The average cost saving was S$0.91/m3 of reclaimed water produced.

scholarly journals An innovative treatment concept for future drinking water production: fluidized ion exchange-ultrafiltration-nanofiltration-granular activated carbon filtration

2009 ◽  
Vol 2 (1) ◽  
pp. 1-24 ◽  
Author(s):  
S. Li ◽  
S. G. J. Heijman ◽  
J. Q. J. C. Verberk ◽  
J. C. van Dijk
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Ion Exchange ◽  
Granular Activated Carbon ◽  
Feed Water ◽  
Water Production ◽  
Treatment Concept ◽  
Drinking Water Production ◽  
Carbon Filtration ◽  
Micro Pollutants

Abstract. A new treatment concept for drinking water production from surface water has been investigated on a pilot scale. The treatment concept consists of fluidized ion exchange (FIEX), ultrafiltration (UF), nanofiltration (NF), and granular activated carbon filtration (GAC). The FIEX process removed calcium and other divalent cations; the UF membrane removed particles and micro-organisms; and the NF membrane and GAC removed natural organic matter (NOM) and micro-pollutants. This study focused on the prevention of fouling of the UF and scaling of the NF and investigated the overall removal of micro-pollutants by the treatment concept. The results of the experiments showed that in 14 days of continuous operation at a flux of 65 l/h. m2 the UF performance was stable with the FIEX pre-treated feed water without the aid of a coagulant. The scaling of the NF was also not observed even at 97% recovery. Different micro-pollutants were spiked in the NF feed water and their concentrations in the effluent of NF and GAC were measured. The combination of NF and GAC removed most of the micro-pollutants successfully, except for the very polar substances with a molecular weight lower than 100 Daltons.

Thermal stability and decomposition of perfluoroalkyl substances on spent granular activated carbon

2020 ◽  
Author(s):  
Feng Xiao ◽  
Bin Yao ◽  
Pavankumar Challa Sasi ◽  
Svetlana Golovko ◽  
Dana Soli ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Perfluoroalkyl Substances
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