scholarly journals A complex of treatment facilities for the neutralization of surface run-off from urban territories

2018 ◽  
Vol 251 ◽  
pp. 03050
Author(s):  
Oleg Primin ◽  
Galina Varyushina ◽  
Andrey Ten
Keyword(s):  
Ecological Condition ◽  
Water Bodies ◽  
Environmental Damage ◽  
Run Off ◽  
Treat Ment ◽  
Urban Territories ◽  
Different Seasons ◽  
Treatment Facilities ◽  
Seasonal Monitoring ◽  
Selection Of

Surface run-off from developed urban territories, be it orderly disposed surface run-off or diffused surface run-off, is among the main sources of man-made pollution and degradation of urban water bodies lo-cated within the boundaries of Moscow. In the present-day context, the improvement of their ecological condition is possible only in case of im-plementation of measures aimed at the reduction of human-induced impact on water bodies, elimination of accumulated environmental damage, re-covery of their self-purification ability and groundwater protection against pollution. The authors give the results of the seasonal monitoring of sur-face run-off composition and the composition of sludge produced by the treatment facilities located on urban territories of different functional pur-pose. The studies proved the idea that the application of polymeric floccu-lants intensifies the process of dewatering the sludge produced by treat-ment facilities in different seasons. The criteria characterizing the main ef-ficiency indices for the selection of technological approaches and equip-ment, were developed based on generalized and summarized experience in seasonal observations and evaluation of process and hydraulic parameters of the operation of surface run-off treatment facilities.

137Cs and 90Sr Accumulation by Higher Aquatic Plants and Phytoepiphyton in Water Bodies of Urban Territories

2008 ◽  
Vol 44 (1) ◽  
pp. 48-59
Author(s):  
P. D. Klochenko ◽  
G. V. Kharchenko ◽  
V. G. Klenus ◽  
A. Ye. Kaglyan ◽  
T. F. Shevchenko
Keyword(s):  
Aquatic Plants ◽  
Water Bodies ◽  
Higher Aquatic Plants ◽  
Urban Territories

Site Selection, Current Design and Management Practices for Land Treatment Units of Petroleum Wastes

1991 ◽  
Vol 24 (12) ◽  
pp. 83-91
Author(s):  
D. C. P. Casarini ◽  
E. Gloeden ◽  
R. C. de A. Cunha
Keyword(s):  
Site Selection ◽  
Management Practices ◽  
Design Management ◽  
Hazardous Waste Management ◽  
Land Treatment ◽  
Management Technology ◽  
Current Design ◽  
Treatment Facilities ◽  
Petroleum Refineries ◽  
Selection Of

Land treatment is defined as the hazardous waste management technology related to application and incorporation of waste into the defined treatment zone of the soil where will occur the degradation, transformation and immobilization of the constituents contained in the applied waste, to ensure protection of surface water and groundwater. This paper describes some criteria for site selection of land treatment facilities used by petroleum refineries, as well as the engineering design, management practices to optimize the process and closure and post-closure techniques.

scholarly journals How many species of cladocerans (Crustacea, Branchiopoda) are found in Brazilian Federal District?

2013 ◽  
Vol 24 (4) ◽  
pp. 351-362 ◽  
Author(s):  
Francisco Diogo Rocha Sousa ◽  
Lourdes Maria Abdu Elmoor-Loureiro
Keyword(s):  
Urban Areas ◽  
Aquatic Vegetation ◽  
Federal District ◽  
Water Bodies ◽  
Aquatic Environments ◽  
Number Of Species ◽  
Different Types ◽  
Local Extinctions ◽  
Richness Estimators ◽  
Selection Of

AIM: This study aimed provides a checklist of cladocerans and also an evaluation of richness and species composition in the Federal District, Brazil. METHODS: Checklist of cladocerans was obtained evaluating data from the literature, from taxonomic collection (Elmoor-Loureiro's collection) and from fauna surveys conducted over more than three decades in different types of aquatic environments. RESULTS: The 57 water bodies studied showed 56 species, of which 14 are new records. The number of species contained in the list displayed corresponds to 85% of what was expected for richness estimators. The highest number of species was observed in the lentic water bodies (52), which also presented the specific composition of fauna (R = 0.110; p = 0.016), possibly because there were samples taken among the aquatic vegetation. According to our understanding, some species may be subject to local extinctions because they inhabit water bodies located exclusively in urban areas, which can lead to a decline in richness. CONCLUSION: Thus, the results of this study can assist in monitoring aquatic environments and in selection of new areas for surveys of cladocerans in the Federal District.

scholarly journals Methodical approaches to the evaluation of surface pollution of water objects in the area of mining enterprises (on the example of Donetsk-Pridniprovsk region)

2021 ◽  
Vol 39 (3) ◽  
pp. 69-75
Author(s):  
Olena Voloshkina ◽  
Olena Zhukova ◽  
Irina Korduba ◽  
Daniil Marshall
Keyword(s):  
Water Quality ◽  
Water Cycle ◽  
Surface Water Quality ◽  
Global Scale ◽  
Ecological Condition ◽  
Water Bodies ◽  
Anthropogenic Factors ◽  
Chemical Indicators ◽  
Quality Of Water ◽  
Long Time

The most important component of ecologically safe development of natural and socio-economic systems is the use of nature, which involves the organization of water resources, which ensures sustainable development and for a long time retains sufficient water potential. The ХХІ century is characterized by significant negative changes in the natural environment caused by the uncontrolled use of natural resources, the development of industry and transport, which leads to increased water consumption and at the same time increase its pollution. This has been particularly noticeable over the last 50 years, when human impact on the planet's water cycle has reached a global scale. Deterioration of the ecological condition of surface waters is due to qualitative and quantitative depletion of factors of their formation, which in some cases makes it impossible to use them for economic purposes. Water quality of water bodies is formed under the influence of both natural and anthropogenic factors. As a result of human activity in reservoirs many anthropogenic substances of various degree of toxicity can arrive. The article attempts to assess changes in surface water quality over the past decade and to determine the degree of natural and man-made transformation of rivers in the region and the possibility of their self-restoration and stabilization of the ecological danger of the region. The existing methods of assessment of water bodies by chemical indicators used in the area of operation of mining enterprises are considered. In some methods, the assessment of water bodies usually reflects regional features rather than their own pollution. Calculations for the water basin river Siverskyi Donets are made and relevant patterns are established.

scholarly journals Agricultural Cenosis Pollution by Heavy Metals from Past Ecological Damage Objects

2016 ◽  
Vol 5 (2) ◽  
pp. 18-24 ◽  
Author(s):  
Дрегуло ◽  
A. Dregulo ◽  
Кулибаба ◽  
Valeriy Kulibaba ◽  
Питулько ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Soil Properties ◽  
Negative Trend ◽  
Environmental Damage ◽  
Ecological Damage ◽  
Podzolic Soils ◽  
Treatment Facilities

Parameters of heavy metals (accumulated in objects with past environmental damage, e.g. unauthorized dumps of municipal wastes, sludge deposits from treatment facilities, and reclaimed quarries) distribution in soddy podzolic soils’ agrocenosis have been studied in this paper. Negative changes of soils’ properties for the lands, periodically experiencing contamination from the objects with past environmental damage have been characterized. In the conditions of minimization of mechanical impact on soil, a negative trend in soil properties changing on the adjacent to objects with past environmental damage lands at preservation of uncontaminated automorphic analogs has been tracked. Agrocenosis degradation indicators are substantially defined by past ecological damage objects’ specifics.

Improving the hydrobiological analysis of activated sludge at the Minsk wastewater treatment facilities

2021 ◽  
pp. 26-36
Author(s):  
О.С. Дубовик ◽  
Р.М. Маркевич ◽  
Е.В. Гаврилович ◽  
И.А. Гребенчикова ◽  
В.В. Иванович
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Point System ◽  
Treatment Conditions ◽  
Filamentous Microorganisms ◽  
Different Seasons ◽  
Treatment Facilities ◽  
Favorable Conditions ◽  
Quantitative Account ◽  
Different Levels

На основании накопленного опыта эксплуатации сооружений Минской очистной станции и обзора источников информации определена схема гидробиологического анализа активного ила, приведена форма регистрации результатов проведенного анализа. Для количественного учета нитчатых микроорганизмов разработана собственная пятибалльная система. Для нитчатых микроорганизмов, выявленных в активном иле, на основании анализа литературных данных определены условия, благоприятствующие их массовому развитию. В течение длительного периода времени, включающего разные сезоны года, проведена апробация усовершенствованной методики для мониторинга состояния иловой суспензии очистных сооружений двух площадок станции: классических четырехкоридорных аэротенков-вытеснителей первой площадки и биореакторов с каскадной денитрификацией второй площадки. Определены представители нитчатых микроорганизмов, постоянно обитающие в очистных сооружениях, выявлены доминирующие виды. Проведено сопоставление результатов анализа нитчатых форм и седиментационных характеристик активного ила. Сделаны заключения об особенностях биоценоза аэротенков первой площадки и биореакторов второй площадки, идентичности по видовому составу сообществ нитчатых бактерий, влиянии состава сточных вод и условий их очистки (нагрузка на ил, наличие зон с разным уровнем аэрации) на свойства иловой суспензии. Based on the accumulated experience in operating the Minsk Wastewater Treatment Facilities and a review of information sources, a scheme for the hydrobiological analysis of activated sludge was determined, and a form for recording the results of the analysis was provided. For the quantitative account of filamentous microorganisms, an original five-point system was developed. Based on the literature data analysis, favorable conditions for the mass growth of filamentous microorganisms found in activated sludge were determined. Over a long period of time, including different seasons of the year, the improved methodology was tested for monitoring the state of the sludge suspension at two sites of the treatment facilities: traditional four-line continuous-flow aeration tanks at the first site and bioreactors with cascade denitrification at the second site. The species of filamentous microorganisms, permanently living in wastewater treatment structures, have been identified, and the dominant species have been determined. The results of the analysis of filamentous forms and sedimentation characteristics of activated sludge are compared. Conclusions were made about the features of the biocenosis in the aeration tanks at the first site and in the bioreactors at the second site; about the identity of the species composition of the filamentous bacteria communities, the effect of the wastewater composition and treatment conditions (sludge load, occurrence of zones with different levels of aeration) on the properties of the sludge suspension.

Cyanophycean (Cyanobacterial) diversity from the Lakhimpur-Khiri District of Northern Uttar Pradesh, India

2021 ◽  
Vol 1 (2) ◽  
pp. 1-2
Author(s):  
Digvijay Verma ◽  
Vinay Kumar Singh ◽  
Rinku Bharati ◽  
Shyam Kishore ◽  
Seshu Lavania
Keyword(s):  
Methylene Blue ◽  
Microscopic Study ◽  
Standard Method ◽  
Uttar Pradesh ◽  
Water Bodies ◽  
Methylene Blue Solution ◽  
Different Seasons ◽  
Blue Solution ◽  
Cyanobacterial Diversity ◽  
First Time

In the present study, the cyanophycean diversity of the Lakhimpur-Khiri district, northern Uttar Pradesh, India, has been investigated for the first time. Algae samples were collected in plastic bottles and preserved in 3-4% formalin from Lakhimpur-Khiri district of northern Uttar Pradesh in different seasons from 2015 to 2016. The field photographs of the selected localities were also taken and the location of each site noted down. For the Microscopic study of Cyanophycean algae, the samples were stained with 1 % aqueous methylene blue solution according to the standard method. The observations and photomicrography were done with help of Nikon Labophot-11 microscope. A total of 31 cyanophycean algal taxa have been recorded from different water bodies of Lakhimpur-Khiri. These algal taxa belong to 14 genera and 9 families of the division Cyanophyata. Of these, Oscillatoria (7), Phormidium (4) and Lyngbya (3) are abundant.

scholarly journals Participatory ranking of fodders in the western hills of Nepal

2020 ◽  
Vol 3 (1) ◽  
pp. 20-28
Author(s):  
Bir Bahadur Tamang ◽  
Manoj Kumar Shah ◽  
Bishnu Dhakal ◽  
Pashupati Chaudhary ◽  
Netra Chhetri
Keyword(s):  
Milk Fat ◽  
Farming System ◽  
Preference Ranking ◽  
Feeding Time ◽  
Scoring Methods ◽  
Tree Fodder ◽  
Different Seasons ◽  
Fodder Yield ◽  
Fat Yield ◽  
Selection Of

Fodder is an important source of feed of the ruminants in Nepal. In the mid hills of Nepal, farmers generally practice integrated farming system that combines crop cultivation with livestock husbandry and agroforestry. Tree fodders are good sources of protein during the forage and green grass scarcity periods especially in dry season. Local communities possess indigenous knowledge for the selection of grasses and tree fodders at different seasons in mid hills of western Nepal. A study was conducted on the perception of farmers with respect to selection of fodder species in eight clusters in Kaski and Lumjung districts that range 900-2000 meter above sea level and receive average precipitation of 2000- 4500mm per annum. During the fodder preference ranking, farmers prepared the inventory of fodders found around the villages and nearby forests and selected top ten most important fodders in terms of their availability, palatability, fodder yield, milk yield and milk fat yield. In total, 23 top ranking fodders species were selected from the eight clusters. These fodder species were also ranked using pairwise ranking and weighted scoring methods and ranking was done on the basis of merit numbers obtained from weighted scores. The analysis revealed Artocarpus lakoocha as best tree fodder followed by Ficus semicordata, Thysanolena maxima and Ficus calvata. Similarly, the calendar of fodders trees for lopping season and the best feeding time was prepared on the basis of farmers’ local knowledge. This study suggests strategies for promotion of locally preferred tree fodder species and supplementing tree fodder with feed in different seasons depending on their availability and local preferences.

scholarly journals Oil Leakage Evaluation for Selection of Emulsion-Based Non-Curable Synthetic Polymer Rubberized Gel (ENC-SPRG) as Waterproofing Material in Underground Structures

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3816
Author(s):  
Kim ◽  
Choi ◽  
Park ◽  
He ◽  
Oh
Keyword(s):  
Property Values ◽  
Synthetic Polymer ◽  
Concrete Slabs ◽  
Environmental Damage ◽  
Test Results ◽  
Underground Structures ◽  
Oil Leakage ◽  
Daily Average ◽  
Leakage Area ◽  
Selection Of

A revised oil leakage evaluation regime is proposed in response to the oil leakage problems of emulsion-based non-curable synthetic polymer rubberized gel (ENC-SPRG) used as a waterproofing material in concrete slabs of residential underground structures. Oil leakage from ENC-SPRG can cause significant economic and environmental damage. As ENC-SPRG waterproofing material is relatively new in the global waterproofing market, a systematic quality control for ENC-SPRG products being manufactured and exported globally is currently non-existent. For the selection of optimal ENC-SPRG, six assessment parameters comprised of averaged and daily average oil leakage mass, averaged and daily average filler content settlement, oil leakage area, and oil leakage duration are proposed. Five ENC-SPRG product specimens are tested to obtain the property values of each parameter. The property values derived from the test results are compared between the tested ENC-SPRG product specimens. With the demonstration of this evaluation regime, a quantified method for a comparative assessment of ENC-SPRG type waterproofing materials is established.

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