Water Treatment
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2021 ◽  
Vol 19 (2) ◽  
pp. 183
Yiyin Klistafani ◽  
Rezki Arsal ◽  
Rahmawati Rahmawati

Penelitian ini bertujuan untuk menyediakan fasilitas sistem pengolahan air umpan boiler (water treatment) yang sesuai dengan sistem PLTU di Laboratorium Konversi Energi. Adapun langkah-langkah rancang bangun ini diawali dengan survey lapangan, studi literatur, desain kemudian perakitan sistem pengolahan air umpan boiler. Pengumpulan data dilakukan dengan pengujian pada air baku dan air umpan boiler kemudian pengujian filter pasir silika, sedangkan analisa data dilakukan dengan membandingkan data hasil pengujian dengan standar air umpan boiler yang ada. Hasil yang diperoleh yaitu tersedianya sistem pengolahan air umpan boiler dengan menggunakan filter pasir silika dan unit pelunak air yang mampu mengubah sifat air baku dari sadah menjadi lunak.  Berdasarkan hasil pengujian sistem pengolahan air umpan boiler, karakteristik air hasil olahan sudah memenuhi standar air umpan boiler, kecuali pada parameter pH.

2021 ◽  
Vol 25 (12) ◽  
pp. 15-23
V.V. Samonin ◽  
E.A. Spiridonova ◽  
A.S. Zotov ◽  
M.L. Podvyaznikov ◽  
A.V. Garabajiu

Data demonstrate the possibility of manufacturing adsorbents by using inorganic industrial waste and provide raw material list for this purpose. Inorganic waste coming from water treatment, mining and construction industries, solid fuel combustion products, spent inorganic sorbents, catalysts and chemical absorbers, chemical, metallurgical and metal finishing industries waste are used as raw materials. Adsorbents production methods by using inorganic industrial waste have been analysed, and parameters of porous structure and adsorbents sorption activity in terms of organic compounds and cations of non-ferrous metals resulting from aqueous medium are listed.

2021 ◽  
Vol 9 (4) ◽  
pp. 345-354
Na-Eun Kim ◽  
Soon-Wook Kwon ◽  
Jeonghwan Seo ◽  
Tae-Ho Ham ◽  
Joohyun Lee

2021 ◽  
Vol 9 (1) ◽  
pp. 38
Anna Lempart-Rapacewicz ◽  
Edyta Kudlek ◽  
Mariusz Dudziak ◽  
Marta Dyrała

The study assessed unfavorable phenomena occurring in swimming pool water, including the occurrence of organic micropollutants in swimming pools and the transformation of these compounds during the swimming pool water treatment processes. The presence of three selected compounds was examined from the personal care products group (PCP) in pool water samples, collected in 2018 and 2019, from fifteen pools characterized using three different solutions of swimming pool water treatment systems. In addition, experimental studies on the effects of UV radiation and ozone on selected organic micropollutants, previously identified in swimming pools and the relationship between swimming pool water turbidity and the concentration of the selected PCP micropollutants, were carried out

2021 ◽  
Vol 12 (8) ◽  
pp. 2140-2160
Carlos Francisco Simões Gomes ◽  
Luiz Flavio Autran Monteiro Gomes ◽  
Luís Alberto Duncan Rangel ◽  
Fabrício Maione Tenório ◽  
Marcos dos Santos

This paper approaches the problem of ballast water treatment in ships. This has been identified as one of the four greatest threats to the world’s oceans. Solutions that have been considered for solving the problem are alternative water treatment technologies. In the case study reported in this paper three major water treatment technologies have been evaluated with the help of twenty-six criteria, quantitative as well as qualitative by using two discrete multicriteria methods, TODIM and THOR 2. The THOR 2 consists of the axiomatic evolution of the THOR method and both THOR 2 and THOR are made available through the THOR Web platform. Five groups of evaluation criteria are then considered: practicality; biological effectiveness; cost/benefit ratio; time frame for the implementation of standards; and environmental impact of the process' sub-products. In this paper a case study on choosing a ballast water treatment technology is presented. Three alternative ballast water management technologies are proposed by experts in the field and are evaluated with the help of twenty-six criteria, quantitative as well as qualitative. Each ballast water management method is described by a list of twenty-six attributes or criteria. After setting the problem in a clear way and consulting different experts, the two separate applications of both TODIM and THOR 2 are performed. What is denoted as Management Method #1 is indeed chosen as the best alternative according to both methods. The conclusion is that those two methods, although conceptually and analytically quite different, lead essentially to the same main results.  Two other applications of both TODIM and THOR have indeed confirmed the convergence of results in spite of the conceptual and technical differences between the two methods. This suggests that formulating a decision problem in a correct, clear-cut way can be at least as important as the technical characteristics of the method per se.

Water ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 3396
Aday Amirbekov ◽  
Aigerim Mamirova ◽  
Alena Sevcu ◽  
Roman Spanek ◽  
Pavel Hrabak

This study evaluated the efficiency of two biofilter systems, with and without biochar chambers installed, at degrading and removing HCH and its isomers in natural drainage water. The biochar biofilter proved to be 96% efficient at cleaning HCH and its transformation products from drainage water, a significant improvement over classic biofilter that remove, on average, 68% of HCH. Although iron- and sulfur-oxidizing bacteria, such as Gallionella and Sulfuricurvum, were dominant in the biochar bed outflows, they were absent in sediments, which were rich in Simplicispira, Rhodoluna, Rhodoferax, and Flavobacterium. The presence of functional genes involved in the biodegradation of HCH isomers and their byproducts was confirmed in both systems. The high effectiveness of the biochar biofilter displayed in this study should further encourage the use of biochar in water treatment solutions, e.g., for temporary water purification installations during the construction of other long-term wastewater treatment technologies, or even as final solutions at contaminated sites.

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