Ozone and UV – a tool for multi-barrier concepts in water treatment

2006 ◽  
Vol 6 (4) ◽  
pp. 17-25 ◽  
Author(s):  
A. Ried ◽  
J. Mielcke
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Water Treatment ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Drinking Water Treatment ◽  
Additional Treatment ◽  
Municipal Wastewater Treatment ◽  
Treatment Processes

The use of ozone and/or UV for water treatment processes is often a combination of an ozone and/or UV-step with additional treatment steps, e.g. biological treatment, flocculation, filtration and activated carbon. Therefore, it is necessary to develop an optimized combination of these different steps. This article will demonstrate the advantages presenting two examples for drinking water treatment and two examples for municipal wastewater treatment.

Is biological treatment a viable alternative for micropollutant removal in drinking water treatment processes?

2013 ◽  
Vol 47 (16) ◽  
pp. 5955-5976 ◽  
Author(s):  
Jessica Benner ◽  
Damian E. Helbling ◽  
Hans-Peter E. Kohler ◽  
Janneke Wittebol ◽  
Elena Kaiser ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Biological Treatment ◽  
Drinking Water Treatment ◽  
Viable Alternative ◽  
Treatment Processes ◽  
Micropollutant Removal

scholarly journals Removal of radio N-nitrosodimethylamine (NDMA) from drinking water by coagulation and Powdered Activated Carbon (PAC) adsorption

2009 ◽  
Vol 2 (1) ◽  
pp. 79-100 ◽  
Author(s):  
J. Chung ◽  
Y. Yoon ◽  
M. Kim ◽  
S.-B. Lee ◽  
H.-J. Kim ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Background Electrolyte ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Powdered Activated Carbon ◽  
Individual Treatment ◽  
Solution Ph ◽  
Treatment Processes

Abstract. The presence of N-nitrosodimethylamine (NDMA) in drinking water supplies has raised concern over its removal by common drinking water treatment processes. A simple detection method based on scintillation spectroscopy has been used to quantify the concentration of 14C-labeled NDMA at various ratios of sample to scintillation liquid. Without sample pretreatment, the method detection limits are 0.91, 0.98, 1.23, and 1.45 ng/L of NDMA at scintillation intensity ratios of 10:10, 5:15, 15:5, and 2.5:17.5 (sample: scintillation liquid), respectively. The scintillation intensity in all cases is linear (R2>0.99) and is in the range of 0 to 100 ng/L of NDMA. In addition, because scintillation intensity is independent of solution pH, conductivity, and background electrolyte ion types, a separate calibration curve is unnecessary for NDMA samples at different solution conditions. Bench-scale experiments were performed to simulate individual treatment processes, which include coagulation and adsorption by powdered activated carbon (PAC), as used in a drinking water treatment plant, and biosorption, a technique used in biological treatment of waste water. The commonly used coagulation process for particulate control and biosorption is ineffective for removing NDMA (<10% by coagulation and <20% by biosorption). However, high doses of PAC may be applied to remove NDMA.

A review of different drinking water treatments for natural organic matter removal

2015 ◽  
Vol 15 (3) ◽  
pp. 442-455 ◽  
Author(s):  
Yue Zhang ◽  
Xinhua Zhao ◽  
Xinbo Zhang ◽  
Sen Peng
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Biological Treatment ◽  
Treatment Options ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
Drinking Water Purification ◽  
Water Treatments

In the past decades, natural organic matter (NOM), which is a complex heterogeneous mixture of organic materials that are commonly present in all surface, ground and soil waters, has had an adverse effect on drinking water treatment. The existence of NOM results in many problems in drinking water treatment processes, and the properties and amount of NOM can significantly affect the efficiency of these processes. NOM not only influences the water quality with respect to taste, color and odor problems, but it also reacts with disinfectants, increasing the amount of disinfection by-products. NOM can be removed from drinking water via several treatment processes, but different drinking water treatment processes have diverse influences on NOM removal and the safety of the drinking water. Several treatment options, including coagulation, adsorption, oxidation, membrane and biological treatment, have been widely used in drinking water purification processes. Therefore, it is of great importance to be able to study the influence of different treatment processes on NOM in raw waters. The present review focuses on the methods, including coagulation, adsorption, oxidation, membrane, biological treatment processes and the combination of different treatment processes, which are used for removing NOM from drinking water.

Occurrence and Removal of Engineered Nanoparticles in Drinking Water Treatment and Wastewater Treatment Processes

2016 ◽  
Vol 46 (3) ◽  
pp. 255-272 ◽  
Author(s):  
Chang Min Park ◽  
Kyoung Hoon Chu ◽  
Namguk Her ◽  
Min Jang ◽  
Mohammed Baalousha ◽  
...  
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Engineered Nanoparticles ◽  
Treatment Processes

scholarly journals Removal of diclofenac by conventional drinking water treatment processes and granular activated carbon filtration

Chemosphere ◽  
2013 ◽  
Vol 92 (2) ◽  
pp. 184-191 ◽  
Author(s):  
Eliane Sloboda Rigobello ◽  
Angela Di Bernardo Dantas ◽  
Luiz Di Bernardo ◽  
Eny Maria Vieira
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Granular Activated Carbon ◽  
Treatment Processes ◽  
Carbon Filtration

scholarly journals Occurrence and Removal of Macrolides in Municipal Wastewater Treatment Plants: A Review

2021 ◽  
Author(s):  
Zahra Abbasi ◽  
Mehdi Ahmadi
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Pathogenic Bacteria ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Operating Conditions ◽  
Municipal Wastewater Treatment ◽  
Activated Carbon Adsorption ◽  
Treatment Processes ◽  
Municipal Wastewater Treatment Plants

Introduction: Macrolides are a group of antibacterial agents. Given their clinical importance, and the consistent rise in resistance among pathogenic bacteria, macrolides have been the targets of extensive research. Materials and Methods: This review considered the number of macrolides in different wastewater and the removal of these drugs. The antibiotics were frequently detected in influents and effluents, ranged from ng/L up to lower μg/L. In influent, the highest concentrations of clarithromycin (6080 ng/L), roxithromycin (>103 ng/L), erythromycin (3900 ng/L), and azithromycin (1949 ng/L) were detected in Croatia, Chinese, USA, and Singapore municipal wastewater treatment plants, respectively. Results: The removal efficiency of macrolides during wastewater treatment processes varies and is essentially dependent on a combination of macrolides physicochemical properties, location of municipal wastewater, and the operating conditions of the treatment systems. The application of alternative techniques, including membrane separation, activated carbon adsorption, advanced oxidation processes, biodegradation, and disinfection were the dominant removal routes for macrolides in different wastewater treatment processes. A combination of these techniques can also be used, leading to higher removals, which may be necessary before the final disposal of the effluents or their reuse for irrigation or groundwater recharge. Conclusion: Many antibiotics cannot be removed completely in wastewater treatment processes and would enter into the environment via effluent and sludge. The molecular structure of macrolides and their load-bearing capacity has led to the advantage of biological treatment over other treatments. However, the main part of the treatment has been done using biological treatment.

Effects of the incorporation of drinking water sludge on the anaerobic digestion of domestic wastewater sludge for methane production

2015 ◽  
Vol 72 (6) ◽  
pp. 1016-1021 ◽  
Author(s):  
Patricia Torres-Lozada ◽  
José Sánchez Díaz-Granados ◽  
Brayan Alexis Parra-Orobio
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Wastewater Sludge ◽  
Municipal Wastewater Treatment ◽  
Methanogenic Activity

Water purification and wastewater treatment generate sludge, which must be adequately handled to prevent detrimental effects to the environment and public health. In this study, we examined the influence of the application of settled sludge from a drinking water treatment plant (SDWTP) on the anaerobic digestion (AD) of the thickened primary sludge from a municipal wastewater treatment plant (SWWTP) which uses chemically assisted primary treatment (CAPT). On both plants the primary coagulant is ferric chloride. The study was performed at laboratory scale using specific methanogenic activity (SMA) tests, in which mixtures of SWWTP–SDWTP with the ratios 100:00, 80:20, 75:25, 70:30 and 00:100 were evaluated. Methane detection was also performed by gas chromatography for a period of 30 days. Our results show that all evaluated ratios that incorporate SDWTP, produce an inhibitory effect on the production of methane. The reduction in methane production ranged from 26% for the smallest concentration of SDWTP (20%) to more than 70% for concentrations higher than 25%. The results indicated that the hydrolytic stage was significantly affected, with the hydrolysis constant Kh also reduced by approximately 70% (0.24–0.26 day−1 for the different ratios compared with 0.34 day−1 for the SWWTP alone). This finding demonstrates that the best mixtures to be considered for anaerobic co-digestion must contain a fraction of SDWTP below 20%.

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