Wyniki wyszukiwania - Biblioteka Nauki

1

Effect of Stormwater System on the Receiver

100%

Babko R. , Szulżyk-Cieplak J. , Danko Y. , Duda S. , Kirichenko-Babko M. , Łagód G.

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tom Vol. 20, nr 6

52--59

EN

The surface water quality assessment could be based on a combined physical and chemical analysis, but it could also be determined with bioindication methods. Classical physicochemical analysis is in most cases more expensive and time-consuming than the bioindication methods. This type of analysis also requires expensive equipment and shows the situation in the water only at the moment of sampling. Although the bioindication methods are often complicated, they allow a relatively inexpensive estimation of the water quality. Moreover, during their implementation, the substances harmful to the environment are not generated, and the obtained results usually reflect the total interaction of all factors and substances to the analyzed living organisms. Indicator organisms or their communities applied to the research, with identified ranges of tolerance to selected factors, could help to determine the physical and chemical parameters of water. This paper presents a bioindication study with an effect of stormwater system on the receiver – the Bystrzyca river, in Lublin, Poland. The level of saprophyty of the river sector was calculated based on the selected species of algae (diatoms and green algae) and the influence of the stormwater discharge on the communities of these organisms was determined.

2

Analyses of Bioretention Systems for Removal of Stormwater Pollutants

100%

Sholagberu A. T. , Nuwagaba E. , Tibenderana P. , Terseer A. , Bainomugisha J. , Twesigye-omwe M. N. , Tobby A. M. , Oluwatosin O. O.

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tom Vol. 25, nr 8

276--285

EN

Stormwater transports directly into rivers eroded soil, animal wastes, pesticides, fertilizers and other potential pollutants. Bioretention is often designed to capture and treat it using the natural properties of soil and plants. However, selection of appropriate media structure and plants need to be adequately studied. This study investigated the performance of bioretention system in removing stormwater pollutants using Dracaena, a local plant, also called Song of India Plants. Physical model of three Columns A, B and C were developed having five layered filter media of different configurations whose materials were analyzed to meet the design standards. The plants were introduced into Columns A and C leaving out B as control experiment. The quality parameters were determined before and after treatments at ages 10, 20, 30 and 40 days when Dracaena plants were introduced into bioretention models. The results showed that the bioretention model drastically improved stormwater quality by reducing values of electrical conductivity, total coliforms (TC), fecal coliforms (FC), total suspended solids (TSS) and biochemical oxygen demand (BOD) as compared to the tested raw stormwater samples. The filter media in both Columns A and C substantially reduced the pollutant levels to standard discharge limits for all parameters tested such as TSS, TC, FC, BOD and nitrates. BOD fell within the recommended standard after 20 days of treatment in Column C with considerable reduction in TC and FC by 68.9% and 75.4% respectively when compared to raw stormwater sample. However, Column C completely removed TC and FC at 40 days which are pathogen indicators in wastewater. This study would be useful to the stakeholders for sustainable stormwater treatment and management.

3

Możliwości usuwania fosforanów z wód opadowych z wykorzystaniem zmodyfikowanego sorbentu

86%

Grela A. , Godyń I.

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tom T. 97, nr 10

1779--1782

PL

Wśród zanieczyszczeń znajdujących się w wodach opadowych fosforany w największym stopniu wpływają na eutrofizację wód powierzchniowych. Oceniono możliwości usuwania fosforanów z wód opadowych z wykorzystaniem sorbentu z popiołu fluidalnego, zmodyfikowanego wapnem. Określono skuteczność usuwania fosforanów w zależności od dawki sorbentu oraz czasu kontaktu. Sorbent scharakteryzowano poprzez określenie jego składu chemicznego, fazowego oraz morfologii, a także właściwości porozymetrycznych.

EN

Fluidal ash sorbent from bituminous coal combustion was modified with Ca(OH)2 and used for removal PO4 3- ions from aq. solns. (concn. 1-7 mg/L) by adsorption at room temp. for 144 h. The ion removal degree was 60-90% 90% after 144 h and the sorbent was recommended for practical use.

4

The use of bioretention cell to decreasing outflow from parking lot

86%

Wałęga A. , Cebulska M. , Gądek W.

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5

Natural Flood Management: A restatement of the Natural Science Evidence

86%

Ganiron Jr. T. U.

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tom 12

92-106

EN

Flood events often have severe socio-economic impacts, such as loss of lives and livelihoods, food, water and energy scarcity, and adverse impacts on human health and the environment. As far as feasible, human interference into the processes of nature should be reversed, compensated and, in the future, prevented. This study explores the possible solutions for the drainage system to ensure peak performance that might be adopted in España Boulevard, Manila. It aims to describe the wastewater management system to prevent and protect the adverse impact of flood events on human health and safety, on valuable goods and property, and on the aquatic and terrestrial environment.

6

Stormwater management : a basic concepts

72%

Zeleňáková M. , Rejdovjanová G.

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tom z. 59, nr 2/I

249--257

EN

The paper presents the basic concepts of wasterwater – domestic, non-domestic as well as rainwater. The concept of drainage in cities, which aims to mitigate the impact of urbanization on the hydrological regime of the country and on aquatic ecosystems, come from our experiences and knowledge of current method of sewerage. New concept of capture and use water from surface run-off provides a platform for a new technical and non-technical measures, both in drained on each property, as well as the public part of urban drainage area.