scholarly journals Comparison and predesign cost assessment of ozonation, membrane filtration and activated carbon for the treatment of recalcitrant organics, a conceptual study

2021 ◽  
Author(s):  
Christine Peyrelasse ◽  
Matthieu Jacob ◽  
Audrey Lallement
Keyword(s):  
Activated Carbon ◽  
Biological Treatment ◽  
Membrane Filtration ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption ◽  
Waste Production ◽  
Refractory Organic Matter ◽  
Conceptual Study ◽  
By Products

Abstract The presence of micropollutants in the environment is today of major concern. These pollutants could have long-term impacts on the environment and on population health. Biological treatment of wastewater is generally insufficient to allow their complete elimination. The establishment of efficient treatments is then needed to degrade the refractory organic matter. Activated carbon adsorption, membrane filtration and oxidation processes are common suitable solutions. All of them have advantages and are effective to treat wastewaters but drawbacks are well known such as waste production, energy consumption or by-products formation. This study aims at defining a strategy to choose the best option according to the nature of the wastewater and the treatment objectives. A methodology was designed for the rating of theses processes to choose the best strategy regarding environmental, technical and economic criteria. A simulation of three wastewater treatment scenarios was carried out to compare the costs of ozonation, adsorption and reverse osmosis. According to the result obtained, a decision tree is proposed to define the best option for a tertiary treatment to reach reuse or discharge objectives.

Removal of geosmin and algae by ceramic membrane filtration with super-powdered activated carbon adsorption pretreatment

2007 ◽  
Vol 7 (5-6) ◽  
pp. 43-51 ◽  
Author(s):  
Y. Matsui ◽  
T. Aizawa ◽  
M. Suzuki ◽  
Y. Kawase
Keyword(s):  
Activated Carbon ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Tap Water ◽  
Powdered Activated Carbon ◽  
Transmembrane Pressure ◽  
Activated Carbon Adsorption ◽  
Consumer Complaints ◽  
Carbon Adsorption ◽  
Water Treatment Plants

The musty-earthy taste and odour caused by the presence of geosmin and other compounds in tap water are major causes of consumer complaints. Although ozonation and granular activated carbon (GAC) adsorption have been practiced in water-treatment plants to remove these compounds effectively, two major problems associated with the application of these processes – formation of stringently regulated bromate ions by ozonation and unhygienic invertebrate colonisation of GAC filters – are still to be resolved. This research advanced the process of adsorption by powdered activated carbon (PAC) by reducing its particle size to the submicrometre range for microfiltration pretreatment. Adsorption pretreatment by using this super (S)-PAC removed the geosmin with vastly greater efficiency than by normal PAC. Removal was attained in a much shorter contact time and at a much lower dosage. The S-PAC was also beneficial in attenuating the transmembrane pressure rises that occurred between both physical backwashings and chemical cleanings.

Kitchen Vehicle Water Treatment Equipment

2012 ◽  
Vol 628 ◽  
pp. 532-535
Author(s):  
Xiang Hong Zhang ◽  
Han Yang ◽  
Xian Da Xie ◽  
Ying Ze Wang
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Water Supply ◽  
Membrane Filtration ◽  
Staple Food ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption ◽  
Treatment Equipment ◽  
In Series ◽  
Filtration Technology

Kitchen Vehicle is an indispensable equipment to guarantee the food in battlefield, which played an important role in series of activities include military exercise, flood-fighting rescue and earthquake relief. Water is a necessity in processing staple and non-staple food in field operations, so there is an urgent need to have one safety water supply device with smaller volume and lighter weight to meet the demands of field kitchen work, therefore, a small vehicular water purifier based on the membrane filtration technology plus activated carbon adsorption and ultraviolet light disinfection technology is developed.

Removal of Trihalomethane Precursors from River and Lake Water by Activated Carbon Adsorption

1991 ◽  
Vol 23 (7-9) ◽  
pp. 1687-1694 ◽  
Author(s):  
Y. Takeuchi ◽  
Y. Suzuki ◽  
A. Koizumi ◽  
N. Soeda
Keyword(s):  
Activated Carbon ◽  
Lake Water ◽  
Biological Treatment ◽  
Chemical Structure ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption ◽  
Strong Relation ◽  
Drinking Water Purification ◽  
Eastern Japan ◽  
Comprehensive Study

A comprehensive study was undertaken to clarify the method of reducing trihalomethane and its precursors from river and lake water in view of drinking water purification. Sources of water were chosen among lakes and rivers in Eastern Japan and biological treatment and coagulative precipitation of the water samples were carried out prior to activated carbon adsorption. A strong relation was shown between TOC and THMFP of raw and treated samples, and the relation changed due to the extent of biological treatment. Though the chemical structure of substances which may cause trihalomethane formation is not clear, the content of ammoniacal nitrogen is responsible for the reduction of trihalomethane formation produced by the addition of chlorine. However, this does not mean that the reduction of chlorine dose can be achieved simply by the process of biological treatment.

scholarly journals Coupling Granular Activated Carbon Adsorption with Membrane Filtration for Chemical Oxygen Demand Removal from High Strength Wastewater

2019 ◽  
Vol 4 (1) ◽  
pp. 1-10
Author(s):  
Aida Isma M.I. ◽  
◽  
Abdo Saad ◽  
Rachid Ali A. ◽  
Kenneth Yeoh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Chemical Oxygen Demand ◽  
Membrane Filtration ◽  
Oxygen Demand ◽  
Granular Activated Carbon ◽  
High Strength ◽  
Ammonia Nitrogen ◽  
Transmembrane Pressure ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption

Combined granular activated carbon adsorption with membrane filtration for high strength wastewater treatment have been carried out. Raw oleo-chemical wastewater and leachate were used as sample. Ultrafiltration is also relatively low cost, easy to backwash and operates up to 3 barg. Experiment was carried out by passing through the sample to an adsorption column for 10 minutes followed by membrane filtration at different transmembrane pressure of 1, 2 and 3 barg. Oleo-chemical samples were analysed for chemical oxygen demand, turbidity, suspended solid and leachate samples were analysed for chemical oxygen demand and ammonia nitrogen according to APHA method. Results showed that the best chemical oxygen demand, suspended solids and turbidity removal for oleo-chemical samples achieved at 2 bar with 64%, 93% and 97%, respectively. Leachate showed the best removal of chemical oxygen demand and ammonia nitrogen achieved at 3 bar, with 76% and 87%, respectively. The adsorption process combined with membrane filtration is feasible as an alternative for conventional biological treatment for high strength wastewater. However, GAC exhaustive breakthrough point requires monitoring.

scholarly journals Separation and characterization of lignin and sugars in the hydrolysate of hot water extraction of poplar wood by membrane filtration and activated carbon adsorption

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 6613-6628
Author(s):  
Guoyu Tian ◽  
Yaqi Chu ◽  
Xiaoqian Chen ◽  
Xiuhong Zhong ◽  
Zhaojiang Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Membrane Filtration ◽  
Hot Water ◽  
Water Extraction ◽  
Poplar Wood ◽  
Activated Carbon Adsorption ◽  
Combined Process ◽  
Hot Water Extraction ◽  
Carbon Adsorption

Hot water extraction of poplar wood was conducted at temperatures from 190 to 200 °C for 5 to 8 min. A hemicellulose yield of 81% and a lignin yield of 38% were obtained at 200 °C for 8 min. A combined process of microfiltration, ultrafiltration, and activated carbon adsorption was developed to separate lignin and sugars in the hydrolysate of hot water extraction. Lignin recovery efficiencies of 56.7%, 26.0%, and 13.2% were attained for microfiltration, ultrafiltration, and activated carbon adsorption, respectively. The characterization of lignin revealed diversity in molecular weight and functional groups, which is beneficial for high-value valorization. The obtained hemicellulose sugars from the combined process showed a good recovery rate of 43.8% and remarkable purity of 97.5%. The purified sugars were a mixture of monomers and oligomers that consisted of arabinose, galactose, xylose, glucose, and mannose. Sugar oligomers with degrees of polymerization from 2 to 6 accounted for 21.6% of all sugars.

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