Application of an enhanced pilot-scale photocatalytic treatment system in ground and river water treatment for drinking purpose using sunlight

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Nhung Thi-Tuyet Hoang ◽  
Quyen Kim Thi Doan ◽  
An Le-Thanh ◽  
Anh Thi-Kim Tran ◽  
Nguyen Nhat Huy
Keyword(s):  
Water Treatment ◽  
River Water ◽  
Pilot Scale ◽  
Treatment System ◽  
Drinking Purpose

scholarly journals Effectiveness of vertical subsurface wetlands for iron and manganese removal from wastewater in drinking water treatment plants

2019 ◽  
Vol 24 (1) ◽  
pp. 135-163
Author(s):  
Jader Martínez Girón ◽  
Jenny Vanessa Marín-Rivera ◽  
Mauricio Quintero-Angel
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Pilot Scale ◽  
Treatment System ◽  
Water Treatment Plants ◽  
Significant Difference

Population growth and urbanization pose a greater pressure for the treatment of drinking water. Additionally, different treatment units, such as decanters and filters, accumulate high concentrations of iron (Fe) and manganese (Mn), which in many cases can be discharged into the environment without any treatment when maintenance is performed. Therefore, this paper evaluates the effectiveness of vertical subsurface wetlands for Fe and Mn removal from wastewater in drinking water treatment plants, taking a pilot scale wetland with an ascending gravel bed with two types of plants: C. esculenta and P. australis in El Hormiguero (Cali, Colombia), as an example. The pilot system had three upstream vertical wetlands, two of them planted and the third one without a plant used as a control. The wetlands were arranged in parallel and each formed by three gravel beds of different diameter. The results showed no significant difference for the percentage of removal in the three wetlands for turbidity (98 %), Fe (90 %), dissolved Fe (97 %) and Mn (98 %). The dissolved oxygen presented a significant difference between the planted wetlands and the control. C. esculenta had the highest concentration of Fe in the root with (103.5 ± 20.8) µg/g ; while P. australis had the highest average of Fe concentrations in leaves and stem with (45.7 ± 24) µg/g and (41.4 ± 9.1) µg/g, respectively. It is concluded that subsurface wetlands can be an interesting alternative for wastewater treatment in the maintenance of drinking water treatment plants. However, more research is needed for the use of vegetation or some technologies for the removal or reduction of the pollutant load in wetlands, since each drinking water treatment plant will require a treatment system for wastewater, which in turn requires a wastewater treatment system as well.

Reduction of natural organic matter by an electrolytic process, conventional coagulation and direct descending filtration in a pilot-scale water treatment system

2014 ◽  
Vol 64 (2) ◽  
pp. 168-175 ◽  
Author(s):  
Victor Cochrane Santiago Sampaio ◽  
Eliezer Fares Abdala Neto ◽  
Ari Clecius Alves de Lima ◽  
Isabel Cristina Lima Freitas ◽  
Marisete Dantas de Aquino
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Pilot Scale ◽  
Treatment System ◽  
Water Treatment System ◽  
Electrolytic Process

The advanced EctoSys electrolysis as an integral part of a ballast water treatment system

2009 ◽  
Vol 60 (9) ◽  
pp. 2227-2234 ◽  
Author(s):  
J. Echardt ◽  
A. Kornmueller
Keyword(s):  
Water Treatment ◽  
River Water ◽  
Hydroxyl Radicals ◽  
Brackish Water ◽  
Ballast Water ◽  
Treatment System ◽  
Worst Case ◽  
Water Treatment System ◽  
Type Approval ◽  
Ballast Water Treatment

A full-scale 500 m3/h ballast water treatment system was tested according to the landbased type approval procedure of the International Maritime Organization (IMO). The system consists of disc filters followed by the advanced EctoSys electrolysis as an integral part for disinfection. The test water quality exceeded by far the minimum requirements for type approval testing. Due to the properties of the special electrodes used together with the striking disinfection effect, the disinfectants assumed to be produced inline by the EctoSys cell in river water were hydroxyl radicals, while in brackish water additionally chlorine and consequently the more stable bromine were formed. In river water, no residual oxidants could be detected in accordance with the assumed production of not responding, highly-reactive and short-living hydroxyl radicals. Accordingly, disinfection byproduct (DBP) formation was very low and close to the limit of quantification in river water. While in brackish water, initial residual oxidant concentrations were maximum 2 mg/L as chlorine and mostly brominated DBP (especially bromoform and bromate) were found. Overall considering this worst case test approach, the DBP concentrations of the treated effluents were below or in the range of the WHO Drinking Water Guideline values and therefore evaluated as acceptable for discharge to the environment. The stringent discharge standard by IMO concerning viable organisms was fully met in river and brackish water, proving the disinfection efficiency of the EctoSys electrolysis against smaller plankton and bacteria.

scholarly journals A Performance Comparison of Pilot-Scale Sand Filtration and Membrane Filtration of Glafkos River Water

2021 ◽  
Vol 9 (2) ◽  
pp. 203
Author(s):  
Fotios K. Katrivesis ◽  
Varvara Sygouni ◽  
Christakis A. Paraskeva ◽  
Vagelis G. Papadakis
Keyword(s):  
Water Treatment ◽  
River Water ◽  
Flow Rate ◽  
Membrane Filtration ◽  
Particle Concentration ◽  
Pilot Scale ◽  
Precipitation Method ◽  
Permeate Flux ◽  
Operational Parameters ◽  
Membrane Unit

Surface-water treatment plants use the flocculation–precipitation method followed by gravity filters to remove suspended solids. In the present work, the replacement of gravity filters with ultrafiltration membrane units is suggested to improve the efficiency of water treatment and to reduce fixed and operational costs. A parametric pilot-scale study was conducted to compare the filtration efficiency of a deep bed and a membrane module for water-simulating river water of various turbidity degrees. Suspensions of kaolinite were prepared to simulate turbidity of the Glafkos River, Achaia Region of Greece and were filtered using a laboratory sand-bed column and a pilot ultrafiltration (UF) membrane unit. Operational parameters such as the particle concentration ratio, the flow rate, and the filter head loss were studied in the case of the granular bed. In the case of membrane filtration, the permeate flux, turbidity, and membrane permeability loss due to fouling were tested. A discussion in terms of the operational cost and environmental impacts was performed. Filtration capacity of the sand filter is a decreasing function of the flow rate and it was found less efficient than membrane ultrafiltration for increased turbidity or increased particle concentration values. Membrane ultrafiltration could achieve long-term economic profit while it is characterized by minimum environmental impact since the use of chemical reagents and the production of waste sludge are limited.

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