Impact of ‘Organic' Pollutants on Coastal Waters, Gulf of Trieste

1986 ◽  
Vol 18 (9) ◽  
pp. 57-68 ◽  
Author(s):  
R. Olivotti ◽  
J. Faganeli ◽  
A. Malej
Keyword(s):  
Organic Pollutants ◽  
Coastal Waters ◽  
Sewage Treatment ◽  
Water Quality Standards ◽  
Gulf Of Trieste ◽  
Satisfactory Condition ◽  
Bathing Waters ◽  
Treatment And Disposal ◽  
The Impact

The main sources of potential ‘organic' pollutants (essentially pathogens, nutrients, floatables, suspended solids and detergents) discharged to the Gulf of Trieste by sewers and rivers are briefly reviewed; about 470,000 people live in the coastal area, and nearly 400,000 of them discharge sewage effluents to the Gulf. This brief review is followed by an evaluation of the impact of such discharges on the quality of marine waters, with reference to the impairment of uses such as bathing and shellfish cultivation. The sanitary and aesthetic aspects of faecal pollution which typically affect coastal waters are examined together with the water quality standards pertaining to bathing waters and shellfish cultivation areas; the extent of pollution of the coastal waters is determined. Experience gained at some wastewater treatment and disposal works is cited. On the whole, the Gulf of Trieste appears to be in a satisfactory condition: more than 85% of the shoreline (totalling 42 km in Yugoslavia and 93 km in Italy) is unpolluted, according to the pertaining standards. Ameliorations are, however, urgently needed in many respects. Recommendations regarding adequate forms of sewage treatment and disposal are made.

Wastewater Disposal in the Rijeka Region

1986 ◽  
Vol 18 (9) ◽  
pp. 77-84
Author(s):  
M. I. Mastrović ◽  
G. D. Šilović
Keyword(s):  
Coastal Waters ◽  
Significant Contribution ◽  
Sewage Treatment ◽  
Legal Regulations ◽  
Wastewater Disposal ◽  
Receiving Waters ◽  
Environmentally Sound ◽  
Year 2000 ◽  
The Impact

This paper emphasizes the need for detailed analysis of wastewaters and their impact on the environment in physical plans for urban/tourist coastal areas, as a significant contribution to environmentally sound development, especially the development of tourism in these areas. The paper describes an analysis of this kind, prepared as part of the Regional Physical Plan for the Rijeka Region to the Year 2000. (The Rijeka Region is a major part of the Yugoslav Upper Adriatic.) The existing situation regarding sewerage systems, sewage treatment methods and disposal methods of the communes of the Region is presented. The quantities of wastewaters generated by the residential and tourist populations and by industry are given (by sub-regions) as calculated in 1981 and as estimated for the year 2000. A survey was made of the impact of wastewater on receiving rivers and coastal waters, and the quality of the receiving waters is given, in grades as compared with those prescribed by the Yugoslav legal regulations. Based on urban development concepts, and on the estimated wastewater quantities, alternative forecasts are made of the future impact of wastewater on coastal waters. General guidelines are presented for the provision of adequate sewage disposal facilities in order to achieve the optimum situation.

scholarly journals Inland and Coastal Bathing Water Quality in the Last Decade (2011–2020): Croatia vs. Region vs. EU

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2440
Author(s):  
Slaven Jozić ◽  
Vanja Baljak ◽  
Arijana Cenov ◽  
Dražen Lušić ◽  
Dominik Galić ◽  
...  
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Inland Waters ◽  
Economic Sectors ◽  
Member States ◽  
Eu Member States ◽  
Mediterranean Countries ◽  
Bathing Waters ◽  
Bathing Water Quality

Europe is one of the leading tourist destinations where tourism is one of the key economic sectors. The quality of bathing waters is a very important factor when choosing a vacation destination. Croatia recognized this early and was one of the first Mediterranean countries to start systematic monitoring of bathing waters. On the other hand, monitoring of inland bathing waters is relatively new and includes a much smaller number of sites (41) compared to coastal waters (894). The aim of this paper was to summarize and analyze the water quality of inland and coastal bathing sites of Croatia, closer regions (non-EU Member States) and in the EU for the last decade. The share of excellent water quality in EU Member States increased by 10.1% and 6.6% for inland and coastal waters, respectively (2011–2020). Germany recorded the highest proportion of excellent water quality for inland waters (92.2%) and Cyprus for coastal waters (99.3%). Looking at the 10-year average of the proportion of bathing waters with excellent quality, the proportion of coastal bathing sites exceeds that of inland waters by 7.1%. It is clear that additional efforts should be made to improve the management and monitoring of inland waters.

The Sewage Treatment and Disposal Problem in Cyprus in the Absence of Sewerage Systems: Limassol Case Study – Evaluation of Compromise Solutions

1989 ◽  
Vol 21 (1) ◽  
pp. 77-86
Author(s):  
E. Malikides
Keyword(s):  
High Efficiency ◽  
Sewage Treatment ◽  
Performance Standards ◽  
Design Standards ◽  
Treatment Methods ◽  
Decentralized System ◽  
Bathing Waters ◽  
Residential Units ◽  
Construction Operation ◽  
Treatment And Disposal

Due to lack of central sewerage systems in coastal towns of Cyprus, temporary measures have been imposed to protect health and environment. As a result sewage is treated in small biological plants serving individual residential units. Effectiveness of treatment methods employed were examined and the method of extended aeration has been proved to be the most suitable for Cyprus conditions. Design standards have to be modified taking into account Cyprus specific conditions, especially that of temperature. Statistical results from 54 small treatment plants operating in the town of Limassol showed that the vast majority of the plants failed to meet either performance standards in terms of BOD5, SS, or bacteriological requirements in terms of faecal coliforms. It was identified that the main reason for this was the lack of proper maintenance. The bacteriological quality of bathing waters has not been affected by temporary measures although many secondary problems have arisen from the operation of about 90 small treatment plants at Limassol town. The per capita cost of construction, operation and maintenance of this decentralized system has been proved extremely high compared with that of centralized system. Improvement of the situation, in the short term, includes reconsideration of temporary measures, modification of design standards relying on reliable and high efficiency treatment methods and rising of plants maintenance level. Radical solution of the problem is the construction of the central sewerage system.

Non-outfall sources of faecal indicator organisms affecting the compliance of coastal waters with directive 76/160/EEC

1997 ◽  
Vol 35 (11-12) ◽  
pp. 151-156 ◽  
Author(s):  
M. D. Wyer ◽  
G. O'Neill ◽  
D. Kay ◽  
J. Crowther ◽  
G. Jackson ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Sewage Treatment ◽  
Recreational Water ◽  
Indicator Organisms ◽  
Adequate Treatment ◽  
Bathing Waters ◽  
General Improvement ◽  
Eu Directives ◽  
Faecal Indicators ◽  
The Eu

The general improvement in UK marine recreational water quality is attributed to the implementation of the EU Directives designed to protect the health of bathers and ensure adequate treatment of urban wastewaters. The effect of this legislation is often to remove the dominant source of faecal indicators which previously masked non-outfall sources. These have the potential to prevent the compliance of identified EU bathing waters with Directive 76/160/EEC standards for faecal coliform bacterial. Detailed investigative methods are outlined which have been employed to identify, quantify and reduce these sources. This problem requires detailed site specific investigation which is expensive when compared to the significant expenditures being committed to sewage treatment.

Analysis of Requirements for Effluent Quality and their Impact on Status of Rivers

2017 ◽  
Author(s):  
Regimantas Dauknys ◽  
Aušra Mažeikienė
Keyword(s):  
Organic Pollutants ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Good Condition ◽  
Ecological Status ◽  
Treated Wastewater ◽  
Effluent Quality ◽  
Lithuanian Rivers ◽  
The Impact

The article analyses Lithuanian rivers, 32 of which have been selected as non-complying with the require-ments of good condition. Furthermore, 15 discharge facilities that discharge wastewater to the aforementioned rivers from agglomerations with population equivalent (PE) greater than 2,000 have been selected. The assessment of the quality of treated wastewater according to the allowable impact on the reception facility has been carried out and has been compared with the currently regulated minimum allowable values of concentrations of pollutants. The analysis of the impact of quality of treated wastewater on the ecological status of rivers has been presented. It has been established that the pollution of rivers would be decreased by an average 8% (organic pollutants and total nitrogen) and by 22% (total phosphorus), if the allowable concentrations of pollutants according to the impact on the reception facility were ensured in the analysed treatment plants with PE greater than 10,000.

The impact of bird populations on the microbiological quality of bathing waters

2005 ◽  
Vol 51 (3-4) ◽  
pp. 199-207 ◽  
Author(s):  
A. Wither ◽  
M. Rehfisch ◽  
G. Austin
Keyword(s):  
Water Quality ◽  
Microbiological Quality ◽  
Late Summer ◽  
Quality Data ◽  
Water Quality Data ◽  
North West ◽  
Bird Populations ◽  
Bathing Waters ◽  
The Impact

To ensure optimum quality at Bathing Waters, the control of diffuse sources of bacterial contamination is receiving increasing attention. As part of an initiative to improve the quality of the EU designated bathing waters on the Fylde Coast (North West England), a project was undertaken to quantify the faecal indicator load from birds and assess the significance on water quality. High bird counts are encountered on the Fylde Coast with gulls, feral pigeons and starlings being prominent. The piers at Blackpool make an attractive roost for starlings with numbers peaking at over 30,000 in late summer. Systematic recording of bird numbers and locations was undertaken during 2001/2. Estimates were also made of the daily faecal organism production by the different species. The spatial distribution of faecal organisms from the bird population was statistically linked to synoptic water quality data. This allowed estimates to be made of the contribution from birds to the faecal pollution load at the bathing waters. The work confirmed a statistically significant link between bird populations and water quality with a marked seasonal bias.

scholarly journals Marine Heatwaves, Sewage and Eutrophication Combine to Trigger Deoxygenation and Biodiversity Loss: A SW Atlantic Case Study

2020 ◽  
Vol 7 ◽  
Author(s):  
Kalina M. Brauko ◽  
Alex Cabral ◽  
Natasha V. Costa ◽  
Juliana Hayden ◽  
Carlos E. P. Dias ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Temporal Trends ◽  
Sewage Treatment ◽  
Austral Summer ◽  
Biodiversity Loss ◽  
Mitigation Strategies ◽  
Sea Surface ◽  
Ecosystem Recovery ◽  
Sw Atlantic ◽  
The Impact

Marine heatwaves (MHWs) are a major concern worldwide due to their increasing impacts in recent years, and these extreme events may trigger deoxygenation of coastal waters affected by sewage and eutrophication. Here we investigate the combined effects of MHWs and nutrient enrichment on the water quality and biodiversity of the Bay of Santa Catarina Island (Brazil). We used historical (1994–2020) sea surface temperature data from satellites and in situ physical, chemical and biological parameters to assess temporal trends. Oxygen levels have been decreasing whilst phosphorus levels have been increasing in the bay. During the austral summer of 2020 a regional sea surface heatwave was detected by satellite, lasting for 9 days and coinciding with our research cruise. During this period, seawater temperatures reached 29.8°C and anoxia was detected for the first time in the bay. A decrease in macrobenthic and phytoplankton community richness correlated with decreases in oxygen both through time and towards more urbanized areas. Overall, poor wastewater treatment is a key stressor that combined with MHWs to degrade coastal waters. Mitigation strategies are needed to minimize the impact of MHWs, including improved sewage treatment, restoration and conservation of wetlands and the use of nature-based technologies to promote coastal ecosystem recovery.

Contribution of non-conventional technologies for sewage treatment to improve the quality of bathing waters (ICREW project)

Desalination ◽  
2007 ◽  
Vol 215 (1-3) ◽  
pp. 82-89 ◽  
Author(s):  
Isabel Martín ◽  
Juana Rosa Betancort ◽  
Juan Ramón Pidre
Keyword(s):  
Sewage Treatment ◽  
Bathing Waters
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