scholarly journals ULTRAVIOLET DISINFECTION AS AN ELEMENT OF MULTI-BARRIER APPROACH TO THE WATER TREATMENT FOR THE PROTECTION AGAINST CHLORINE-RESISTANT PATHOGENS

2019 ◽  
Vol 96 (6) ◽  
pp. 531-535
Author(s):  
Z. I. Zholdakova ◽  
E. A. Tulskaya ◽  
S. V. Kostuchenko ◽  
Andrey A. Tkachev
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Wastewater Treatment Plants ◽  
Uv Disinfection ◽  
Ultraviolet Disinfection ◽  
Water And Wastewater Treatment ◽  
Large Cities ◽  
Disinfection Methods ◽  
Wide Range ◽  
Water And Wastewater

Ultraviolet disinfection is the most efficient mode in combination with other disinfection methods within multi-barrier approach for the water treatment. UV disinfection being effective against a wide range of pathogens including the chlorine-resistant (viruses and protozoa) significantly reduces chlorine byproducts. This paper presents a review of results of the implementation of multi-barrier lay-out with the application of UV disinfection at water and wastewater treatment plants of large cities: St. Petersburg and Nizhniy Novgorod.

scholarly journals Overview of radiotracer experiments for better understanding of wastewater and water treatment plants in Lima (Perú)

2018 ◽  
Vol 13 (13) ◽  
pp. 85-92
Author(s):  
Carlos Sebastián Calvo
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Wastewater Treatment Plants ◽  
Flow Behavior ◽  
Experimental Results ◽  
Water And Wastewater Treatment ◽  
Water Treatment Plants ◽  
Water And Wastewater ◽  
Different Levels

The objectives of this paper are to present an overview of possible applications of the radiotracers for better understanding of water and wastewater treatment plants. Numerous experiments have been carried out in different plants located in Lima. Four processes have been investigated: desanders, flocculators, clarifiers and digesters. Depending on the studied process, the experimental results have been interpreted at different levels of complexity: from simple troubleshooting to the modeling of the flow behavior inside the process.

Sludge management of small water and wastewater treatment plants

2004 ◽  
Vol 48 (11-12) ◽  
pp. 33-41 ◽  
Author(s):  
O. Nowak ◽  
V. Kuehn ◽  
M. Zessner
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Wastewater Treatment Plants ◽  
Advanced Treatment ◽  
Economic Pressure ◽  
Water And Wastewater Treatment ◽  
Sludge Treatment ◽  
Small Water ◽  
Water Treatment Plants ◽  
Water And Wastewater

“Disposal or reuse?” is the big question in respect to sewage and water sludges. This question is even more decisive for small plants, because the achievement of the advanced treatment necessary for disposal is much more difficult in small units than in big ones. The paper discusses this question with main focus on small WWTPs and gives a short overview of the specifics of sludge treatment in small units as well as of outlets for sludge from water treatment plants. In general, small WWTPs do not have a better sludge quality than larger ones, but the economic pressure to realise reuse is higher on them than on large plants.

Nanofiltration of endocrine disrupting compounds

2003 ◽  
Vol 3 (5-6) ◽  
pp. 321-327 ◽  
Author(s):  
M. Gallenkemper ◽  
T. Wintgens ◽  
T. Melin
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Compounds ◽  
Municipal Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Endocrine Disrupting ◽  
Municipal Wastewater Treatment Plants ◽  
Set Up

Endocrine disrupting compounds can affect the hormone system in organisms. A wide range of endocrine disrupters were found in sewage and effluents of municipal wastewater treatment plants. Toxicological evaluations indicate that conventional wastewater treatment plants are not able to remove these substances sufficiently before disposing effluent into the environment. Membrane technology, which is proving to be an effective barrier to these substances, is the subject of this research. Nanofiltration provides high quality permeates in water and wastewater treatment. Eleven different nanofiltration membranes were tested in the laboratory set-up. The observed retention for nonylphenol (NP) and bisphenol A (BPA) ranged between 70% and 100%. The contact angle is an indicator for the hydrophobicity of a membrane, whose influence on the permeability and retention of NP was evident. The retention of BPA was found to be inversely proportional to the membrane permeability.

Recent Trends and Advancement in Nanotechnology for Water and Wastewater Treatment

2016 ◽  
pp. 208-252
Author(s):  
Sushmita Banerjee ◽  
Ravindra Kumar Gautam ◽  
Pavan Kumar Gautam ◽  
Amita Jaiswal ◽  
Mahesh Chandra Chattopadhyaya
Keyword(s):  
Wastewater Treatment ◽  
Management Practices ◽  
Future Research ◽  
Inorganic Contaminants ◽  
Waste Streams ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Recent Trends ◽  
Water And Wastewater ◽  
Significant Attention

Fast growing demand of fresh water due to increasing population and industrialization dictated research interests towards development of techniques that offers highly efficient and affordable methods of wastewater treatment. In recent decades water treatment using nano-technological based expertise have gained significant attention. Varieties of nanoparticles were synthesized and proficiently used in treatment of wide range of organic and inorganic contaminants from waste streams. This chapter encompasses recent development in nano-technological approach towards water and wastewater treatment. The authors tried to compile up to-date development, properties, application, and mechanisms of the nanoparticles used for decontamination purpose. This piece of work offer a well organized comprehensive assessment of the technology that delineates opportunities as well as its limitation in water management practices moreover few recommendations for future research are also proposed.

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