The effect of the water pre-treatment method on the adsorption process in a surface water treatment system

2020 ◽  
Vol 199 ◽  
pp. 234-240
Author(s):  
Małgorzata Wolska ◽  
Aleksandra Sambor ◽  
Magdalena Pawłowska
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Adsorption Process ◽  
Treatment Method ◽  
Treatment System ◽  
Water Treatment System ◽  
Surface Water Treatment ◽  
Pre Treatment

scholarly journals Evaluation of the efficiency of a gray water treatment system based on aeration and filtration

2021 ◽  
Author(s):  
Maziar Kabiri ◽  
Abolfazl Akbarpour ◽  
Mohammad Akbari
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Total Coliform ◽  
Treatment System ◽  
Treated Wastewater ◽  
Ultraviolet Disinfection ◽  
Water Treatment System ◽  
Gray Water ◽  
Series Of Experiments ◽  
Disinfection Unit

Abstract Gray water is a great resource for replacing fresh water to be used in standardized usages. The use of treated gray water reduces water consumption and the entry of pollutants into the environment. However, if left untreated, it can be dangerous. The present study examines the efficiency of a gray water treatment system consisting of primary filter, aeration, secondary filter and ultraviolet disinfection unit. After examining the characteristics of gray water, the efficiency of this system was analyzed to remove the pH, TSS, BOD, COD, ABS and total coliform parameters. Then, the gray water treated through this system was compared with the environmental standard of Iran. The pH of the treated gray water was 7.5–7.6. The efficiency of this system for removing the BOD and COD parameters was 98–100 and 76–100%, respectively. This system had an efficiency of 96–97% to eliminate the ABS parameter. Also, this system was able to eliminate total coliform with 100% efficiency. Results showed that in the three series of experiments performed on this system, according to the Iranian standard, the treated wastewater is suitable for irrigation and agricultural uses. However, this system could not be licensed for the COD parameter regarding the discharge to surface water and absorbent wells.

scholarly journals Decentralized solar-powered drinking water ozonation in Western Kenya: an evaluation of disinfection efficacy

2020 ◽  
Vol 4 ◽  
pp. 56
Author(s):  
Colin Hendrickson ◽  
Jared Oremo ◽  
Oscar Oluoch Akello ◽  
Simon Bunde ◽  
Isaac Rayola ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Surface Water ◽  
Drinking Water Treatment ◽  
Treatment System ◽  
Coliform Bacteria ◽  
Small Scale ◽  
Water Treatment System ◽  
E Coli ◽  
Solar Powered

 Background: Decentralized drinking water treatment methods generally apply membrane-based treatment approaches. Ozonation of drinking water, which previously has only been possible at large centralized facilities, can now be accomplished on a small-scale using microplasma technology. The efficacy of decentralized solar-powered drinking water treatment systems has not previously been described. Methods: We established a 1,000L decentralized solar-powered water treatment system located in Kisumu County, Kenya. Highly contaminated surface water is pumped to the treatment system, which includes flocculation and filtration steps prior to ozonation. Turbidity, total coliform bacteria, and E. coli were measured at various stages of water treatment, and bacterial log reduction values (LRVs) were calculated. Results: Forty-seven trials were conducted in which1000L of water were flocculated, filtered, and ozonated for 180 minutes. Baseline turbidity and E. coli concentrations were reduced from a median of 238 nephelometric turbidity units (NTU) and 2,419.7 most probable number/100mL, respectively, in surface water to 1.0 NTU and undetectable E. coli after ozonation for 180 minutes. The median E. coli LRV was 3.99. Conclusions: The solar-powered, decentralized water treatment system that utilizes ozonation for disinfection was founded to reduce E. coli by more than 3 log-orders of magnitude despite the high turbidity of the raw water. Further research is needed to characterize limitations, scalability, economic viability, and community perspectives that could help determine the role for similar systems in other settings.

scholarly journals Introduction of an adsorption process into a surface water treatment system and its effect on disinfectant use

2019 ◽  
Vol 19 (5) ◽  
pp. 1354-1362
Author(s):  
Małgorzata Wolska ◽  
Halina Urbańska-Kozłowska ◽  
Marek Mołczan
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Reaction Rates ◽  
Treatment System ◽  
Water Tank ◽  
Organic Substances ◽  
Short Term ◽  
Surface Water Treatment ◽  
Time Period

Abstract The study was conducted in a full-scale water treatment facility where surface water is treated. The analysis of required disinfectant dosage changes and disinfectant usage was conducted in a time period starting 6 months before introducing adsorption on granular activated carbon (GAC) into the treatment system, and continuing for 6 months after adsorption introduction. During the analyzed time period, both chlorine and chlorine dioxide were used. They were dosed separately and rapidly mixed into a pipeline before the clean water tank. Both short-term and long-term disinfectant consumption was studied. This is due to the different reaction rates of the disinfecting agents used. Introducing GAC adsorption contributed significantly to limiting organic substances in water undergoing disinfection, which resulted in average reductions of 51% for both disinfectants. During the first month after introducing adsorption only a small increase in disinfectant demand was found, connected with an increase in 22 °C cultivated bacteria count in water to be disinfected. The increase in organic substances removal achieved by the use of adsorption did not result in a reduction of analyzed trihalomethanes (THM), whose concentrations were low for both cases and amounted to 2.1–7.9 μg/dm3 and 1.6–5.2 μg/dm3 with and without adsorption respectively.

Effects of the filtration flux and pre-treatments on the performance of a microfiltration drinking water treatment system

2006 ◽  
Vol 6 (4) ◽  
pp. 81-87 ◽  
Author(s):  
Hae-Nam Jang ◽  
Dae-Sung Lee ◽  
Min-Koo Park ◽  
Sun-Young Moon ◽  
Soo-Young Cho ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Filtration ◽  
Drinking Water Treatment ◽  
Treatment System ◽  
Raw Water ◽  
Water Treatment System ◽  
High Turbidity ◽  
Pre Treatment ◽  
Filtration Flux

This study was performed to investigate the effects of flux and pre-treatment on the operation performance of a microfiltration drinking water treatment system through a pilot scale operation using lake water as raw water. The pilot plant had a capacity of 500 m3/day with a five membrane module and was operated for 1 year to carry out the experiments for the variation of filtration flux, physical cleaning conditions and pre-treatment conditions. Also, an experiment was performed when raw water with high turbidity flowed into the system as well as that pretreated with powdered activated carbon (PAC). When the MF system was operated with filtration flux of 2 m3/m2 day, it could not be operated more than 500 h due to the continuous TMP (Trans-membrane pressure) increase. In case of filtration flux of 1 m3/m2 day, the system could be operated continuously for more than 1300 hours without the increase in the TMP. During this experimentation period, raw water with high turbidity (above 400NTU) was fed into the membrane system. Therefore, the TMP increased by approximately 4.90 kPa compared to the TMP for the previous raw water with lower turbidity. In the case of the PAC pretreated membrane filtration process, the TMP tended to increase slightly. However, the TMP was reduced by performing coagulation and mixing after injecting PAC.

Improvement of Lake Water Quality by using Moving Rapid Water Treatment System

2018 ◽  
Vol 18 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Kwang-Hee Lee ◽  
◽  
Min-Ho Kim ◽  
Nam-Woo An ◽  
Chul-hwi Park
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Lake Water ◽  
Treatment System ◽  
Lake Water Quality ◽  
Water Treatment System
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