scholarly journals Comparison of ozonation removal for PPCPs in secondary treated sewage by microbubble generator and ejector

2021 ◽  
Vol 27 (2) ◽  
pp. 200163-0
Author(s):  
Ilho Kim ◽  
Jaiyeop Lee
Keyword(s):  
Inflection Point ◽  
Elimination Rate ◽  
Qsar Model ◽  
Sewage Water ◽  
Source Water ◽  
Low Concentration ◽  
Toxic Concentration ◽  
Treated Sewage ◽  
Spe Method ◽  
Ozone Injection

This study analyzed residues of PPCPs in secondary treated sewage water, and their amount eliminated by ozonation processes. A microbubble nozzle and ejector were used to dissolve ozone. To consider a low concentration of PPCPs, a SPE method was performed on samples prior to the analysis. The concentration of dissolved ozone was 4.00 mg/L in the microbubble and 2.49 mg/L in the ejector. To examine elimination trends, the experiment was also performed at a low concentration of ozone, 1/10 of its original concentration. The maximum elimination rate on average was 93.0% in the ejector, higher than that in the microbubble (90.1%), but 16 PPCPs were found to show a relatively high elimination rate in the microbubble, higher than the ejector. Elimination trends with respect to time were distinguished based on inflection point, and 11 PPCPs were concentrated on the latter half of the microbubble after the inflection point at the low concentration of ozone, which was compared to other cases. In the source water, concentrations of 2 PPCPs were higher than the reference toxic concentration based on the QSAR model, but after treatment, only bezafibrate was over the value when the ejector with low ozone injection concentration was applied.

Minerals in Soils and Forages Irrigated with Secondary Treated Sewage Water in Sebele, Botswana

2004 ◽  
Vol 5 (1) ◽  
pp. 155-161 ◽  
Author(s):  
A.A. Aganga ◽  
S. Machacha . ◽  
B. Sebolai . ◽  
T. Thema . ◽  
B.B. Marotsi .
Keyword(s):  
Sewage Water ◽  
Treated Sewage

scholarly journals Comparative Analysis of the Effectiveness of Regulation of Aeration Depending on the Quantitative Characteristics of Treated Sewage Water

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Myroslav Malovanyy ◽  
Vira Shandrovych ◽  
Andriy Malovanyy ◽  
Igor Polyuzhyn
Keyword(s):  
Comparative Analysis ◽  
Dissolved Oxygen ◽  
Ammonium Nitrogen ◽  
Sewage Water ◽  
Initial Concentration ◽  
Treated Sewage ◽  
Quantitative Characteristics ◽  
Aeration Process ◽  
Effectiveness Of Regulation

Monitoring of work of the aeration tanks of operating town treatment plants is done. Based on the obtained results a conclusion has been drawn that sewage water is improperly treated from ammonium nitrogen. The velocity of the aeration process, depending on the concentration of dissolved oxygen and ammonium nitrogen, is investigated. The obtained investigation data became the basis for modeling the aeration process in industrial conditions depending on the required initial concentration of ammonium nitrogen.

scholarly journals Investigating psychological factors of behavioural intention of urban residents in South Australia to use treated stormwater for non-potable purposes

2013 ◽  
Vol 3 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Zhifang Wu ◽  
Elizabeth Hemphill ◽  
Jennifer McKay ◽  
Ganesh Keremane
Keyword(s):  
Health Risk ◽  
Online Survey ◽  
South Australia ◽  
Perceived Health ◽  
Sewage Water ◽  
Urban Residents ◽  
Intention To Use ◽  
Aquifer Recharge ◽  
Treated Sewage ◽  
Local Water

This paper reports on the intentions of urban residents in two South Australian Local Government Areas (LGAs) (council areas) to use stormwater treated through a managed aquifer recharge process for various potential non-potable uses. Data were collected through an online survey of the residents in these LGAs. The key finding is that, in common with recycled sewage water, the intention to use treated stormwater was lower for uses having closer contact with people. A hypothesized model consisting of possible factors influencing the intention to use treated stormwater was developed based on the contemporary literature relating to usage of treated sewage water. Greater trust in the local water authority was shown to be associated directly and closely with a lower perceived health risk. A positive attitude by respondents to the use of treated stormwater (as an aspect of a sustainable future) was found to be more likely to result in an intention to use the treated stormwater for non-potable purposes. Respondents' perceived health risk, emotions and environmental concerns all had significant associations with their attitudes to using stormwater but were not associated with their intention to use it.

scholarly journals Impact of treated sewage water on nutrient status of alfisols and vegetable crops

2021 ◽  
Vol 49 (2) ◽  
pp. 12255
Author(s):  
Shamsul HAQ ◽  
Ram BHAROSE ◽  
Rouf A. BHAT ◽  
Munir OZTURK ◽  
Volkan ALTAY ◽  
...  
Keyword(s):  
Water Samples ◽  
Positive Impact ◽  
Nutrient Status ◽  
Sewage Water ◽  
Soil Samples ◽  
Vegetable Crops ◽  
Three Samples ◽  
Treated Sewage ◽  
Safe Limits ◽  
The Impact

This study was conducted to determine the impact on the nutrient status of soil and vegetable crops irrigated with the treated sewage water. Three samples of water and five samples of soil and five commonly grown vegetables viz. radish, carrot, spinach, cauliflower, and potato were collected from Ganjia, Arail and Dandi located in Naini, Allahabad (India). The water samples were analysed for pH, EC, and heavy metals (Pb2+, Cr3+, Cd2+ and Ni2+) concentration. Water samples from all the sites were alkaline with EC below the safe limits. The soil and plant samples from all the three sites showed that Gangia recorded the highest value of EC (dS m-1), organic carbon (OC) (%), available NPK (kg ha-1), and micronutrients concentration (Mn2+, Zn2+ and Fe2+) (mg kg-1) whereas, the lowest concentration was recorded at Dandi followed by Arail. The soil samples collected from all three sites were alkaline. The nutrient status (N, P and K) showed the highest value in potato in the three sites, whereas manganese and zinc showed the highest value in spinach and iron in carrot.  The study concludes that treated sewage water used for irrigation has a positive impact on nutrient status in soils and as well as in vegetable crops.

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