scholarly journals Natural water treatment system: the potential of applying artificial floating island technology in lakes, ponds and dam lakes in Turkey

2021 ◽  
Vol 4 (4) ◽  
pp. 376-394
Author(s):  
Mert Minaz ◽  
Ayşegül Kubilay
Keyword(s):  
Natural Waters ◽  
Organic Pollution ◽  
Pilot Scale ◽  
Treatment System ◽  
Added Value ◽  
Pollution Load ◽  
Negative Effects ◽  
Floating Island ◽  
Scale Establishment ◽  
Economical Alternative

In this study, the implementation potential of artificial floating island (AFI) technology, which is a phytoremediation strategy, was investigated in Turkish lakes, ponds and reservoirs. The pressure on water resources is increasing ever with the global warming as well as the effect of climate change. In addition, increasing environmental pollution directly and/or indirectly harms the organisms thus has negative effects on their lives. In this context, the importance of lakes, ponds and dam lakes in Turkey against adverse global and environmental conditions has increased in recent years. Innovative, sustainable and economical solutions are required for the improvement of lakes, ponds and dam lakes, considering that these are main resources of drinking water, irrigation of agricultural lands, and recreational activities. Considering the current trophic state of natural waters in our country, many lakes, ponds or dam lakes have been identified with eutrophication potential. AFI technology, which is widely established globally to remediate such organic pollution load, is a highly economical alternative treatment system. Previous studies have generally focused on the laboratory and pilot scale implementation of AFI technology. In the future, full-scale establishment of AFI technology will provide significant added value for both the scientific and the national economy.

scholarly journals Evaluation of barrier functions of traditional water supply facilities in relation to toxic trihalomethanes

2018 ◽  
Vol 251 ◽  
pp. 03032 ◽  
Author(s):  
Zhanna Govorova ◽  
Galina Gorenko ◽  
Uliana Rudich ◽  
Vadim Govorov
Keyword(s):  
Water Treatment ◽  
Water Supply ◽  
Natural Waters ◽  
Organic Pollution ◽  
Human Organism ◽  
Technological Parameters ◽  
Negative Effects ◽  
Foreign Countries ◽  
Reagent Treatment ◽  
Carcinogenic Substances

The problem of formation of the toxic carcinogenic substances in the process of the water treatment during disinfection of natural waters containing organic pollution is actual both in Russia and in foreign countries. There is an information about the negative effects of trihalomethanes (THM) on the human organism. The examples shows that, the concentration of trihalomethanes in the drinking water exceeds the standards several times in water treatment according to the traditional technology with the use of chlorine. The aim of the work was to study the dynamics of THM changes in the stages of purification in the comparison with the water quality, the reagent treatment modes and technological parameters to assess the barrier role of existing water supply stations. It was found that the standard degree of the purification achieves with chromaticity, turbidity, permanganate oxidation, bacteriological parameters. At the same time, the prechlorination of water with a temperature of 1 ° C and a chromaticity of 67-71 °C leads to the formation of chloroform in the amount of 40-61 µg/l, and postchlorination at the final stage of the full cycle contributes to an increase in the concentration to 192-215 µg/l. The new data were the basis for the development of the improved water purification technology and measures for the modernization of the water supply stations.

scholarly journals Implementation of green extraction and isolation methodologies for the recovery of bioactive compounds from olive-growing products and by-products

2014 ◽  
Author(s):  
Νικόλαος Ξυνός
Keyword(s):  
Subcritical Water ◽  
Pilot Scale ◽  
Biological Properties ◽  
Added Value ◽  
Green Extraction ◽  
Kernel Oil ◽  
Olive Kernel ◽  
Table Olive ◽  
Phd Thesis ◽  
By Products

The experimental work of this PhD thesis has been scheduled on a three-axis base. Theaims that were set, they concerned the optimal exploitation of four different by-products of the table olive, olive oil and olive kernel oil industries, for the recovery of specific highadded-value compounds with well-known biological properties. Those natural productswere desired either in the form of enriched fractions or pure compounds. The prerequisitewas to utilize as eco-friendly technologies as possible for extraction and purification and tooptimize the processes in laboratory as well as in pilot scale. Thus, trustworthy estimationof industrial feasibility is provided. The main technologies that were implicated for therecovery of the target compounds are: Supercritical fluid extraction Pressurized liquid (and subcritical water) extraction Liquid/liquid extraction Adsorption resin technology Centrifugal Partition ChromatographyThe by-products that were the subject of the tracing/ extraction/ enrichment/identification/ quantification on studies for this PhD thesis were the following: Olive leaves (by-products of the pruning of the trees and of the olive fruit harvest) Olive mill pomace waste (biphasic process) Table olive process wastewater (by-product of the debittering process for theproduction of table olives) Olive kernel oil deodorization distillates (by-product of the refining process for theproduction of olive kernel oil from olive pomace)The natural compounds that were targeted for their recovery, enrichment and isolation dueto their well-established (and still under research) biological properties and theirapplication in pharmaceutical, phytotherapeutical, nutraceutical, cosmetic andcosmeceutical industries were respectively: Oleuropein Hydroxytyrosol SqualeneIn all cases, not only biomarkers’ content but also the overall chemical profile of theextracts was studied. The applied scientific interest of this work was that novel green extraction technologies and combinatorial processes as well as experimental design wereimplemented in lab and pilot scale for the exploitation of certain by-products that occur invery large quantities every year as a result of the agricultural/ industrial processing of theolive tree, with the aim of recovering high added value natural products.

scholarly journals A Floating Island Treatment System for the Removal of Phosphorus from Surface Waters

Engineering ◽  
2018 ◽  
Vol 4 (5) ◽  
pp. 597-609 ◽  
Author(s):  
Mark T. Brown ◽  
Treavor Boyer ◽  
R.J. Sindelar ◽  
Sam Arden ◽  
Amar Persaud ◽  
...  
Keyword(s):  
Surface Waters ◽  
Treatment System ◽  
Floating Island

Corporate Added Value in the Context of Web 2.0

2010 ◽  
pp. 91-100
Author(s):  
Oliver Bohl ◽  
Shakib Manouchehri
Keyword(s):  
Web 2.0 ◽  
Capital Market ◽  
Business Models ◽  
Added Value ◽  
Market Model ◽  
Negative Effects ◽  
Activity Model ◽  
Corporate Actions ◽  
The Relationship

Firms have faced and explored the increased use of Web 2.0. Driven mainly by private users, Web 2.0 may also have significant implications for corporate actions and business models. By systematically scanning and verifying possible positive and negative effects on the value of their creation, firms might be able to formulate and establish well-grounded strategies for corporate Web 2.0 applications and services. To establish such a process in an effective and adequate manner, it is necessary to analyze the relationship between Web 2.0 and corporate added value. This chapter contributes to these efforts by demonstrating that the corporate use of Web 2.0 applications is reinforced by fundamental and long-term business trends. The discussion pertains to the possibilities emerging from the application of Web 2.0 paradigms to business models; the market model, the activity model, and the capital market model. The potentials, risks, mainsprings, and restrictions associated with the corporate use of Web 2.0 are evaluated.

Quick estimation for pollution load contributions of aromatic organics in wastewater from pulp and paper industry

2018 ◽  
Vol 33 (3) ◽  
pp. 568-572 ◽  
Author(s):  
Zhimin Wei ◽  
Youming Li ◽  
Yi Hou
Keyword(s):  
Paper Industry ◽  
Regression Line ◽  
Pulp And Paper Industry ◽  
Organic Pollution ◽  
Pulp And Paper ◽  
Accurate Estimation ◽  
Molecular Formula ◽  
Pollution Load ◽  
Contamination Control ◽  
Line Equation

Abstract Quick and accurate estimation of organic pollution load such as COD in wastewater is very important for the implementation of cleaner production, especially in pulp and paper industry. In order to find the contribution of pollution load of aromatic organics, several non-aromatic and aromatic organics were studied. Results indicated that there was a good linear correlation between theoretical COD (ThOD) and composite parameters of ln(C + H)/O, which is calculated from the amount of C, H and O atoms in the molecular formula. From the regression line equation of ThOD vs ln(C + H)/O, it is found that the gradient of the aromatic ring regression line is lower than that of other acyclic compounds, which may be ascribed to aromatics which were hard to oxidize in measurements of COD. An actual COD well matched to the ThOD estimated for common aromatics with phenolic and non-phenolic structures often appeared for wastewater from pulp and paper industry, with a relative error rate of ± 5 %. Ideal recovery rates of these, 95 % to 105 %, were achieved. This work provides an effective method for quick and accurate estimation for pollution load contributions, which is important for contamination control and progress in industry.

scholarly journals Effectiveness of vertical subsurface wetlands for iron and manganese removal from wastewater in drinking water treatment plants

2019 ◽  
Vol 24 (1) ◽  
pp. 135-163
Author(s):  
Jader Martínez Girón ◽  
Jenny Vanessa Marín-Rivera ◽  
Mauricio Quintero-Angel
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Pilot Scale ◽  
Treatment System ◽  
Water Treatment Plants ◽  
Significant Difference

Population growth and urbanization pose a greater pressure for the treatment of drinking water. Additionally, different treatment units, such as decanters and filters, accumulate high concentrations of iron (Fe) and manganese (Mn), which in many cases can be discharged into the environment without any treatment when maintenance is performed. Therefore, this paper evaluates the effectiveness of vertical subsurface wetlands for Fe and Mn removal from wastewater in drinking water treatment plants, taking a pilot scale wetland with an ascending gravel bed with two types of plants: C. esculenta and P. australis in El Hormiguero (Cali, Colombia), as an example. The pilot system had three upstream vertical wetlands, two of them planted and the third one without a plant used as a control. The wetlands were arranged in parallel and each formed by three gravel beds of different diameter. The results showed no significant difference for the percentage of removal in the three wetlands for turbidity (98 %), Fe (90 %), dissolved Fe (97 %) and Mn (98 %). The dissolved oxygen presented a significant difference between the planted wetlands and the control. C. esculenta had the highest concentration of Fe in the root with (103.5 ± 20.8) µg/g ; while P. australis had the highest average of Fe concentrations in leaves and stem with (45.7 ± 24) µg/g and (41.4 ± 9.1) µg/g, respectively. It is concluded that subsurface wetlands can be an interesting alternative for wastewater treatment in the maintenance of drinking water treatment plants. However, more research is needed for the use of vegetation or some technologies for the removal or reduction of the pollutant load in wetlands, since each drinking water treatment plant will require a treatment system for wastewater, which in turn requires a wastewater treatment system as well.

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