scholarly journals Multi-criterial evaluation of P-removal optimization in rural wastewater treatment plants for a sub-catchment of the Baltic Sea

AMBIO ◽  
2017 ◽  
Vol 47 (S1) ◽  
pp. 93-102 ◽  
Author(s):  
Michael Cramer ◽  
Tatyana Koegst ◽  
Jens Traenckner
Keyword(s):  
Wastewater Treatment ◽  
Baltic Sea ◽  
Wastewater Treatment Plants ◽  
The Baltic Sea ◽  
The Baltic ◽  
Criterial Evaluation ◽  
P Removal ◽  
Rural Wastewater

Procuring 230 Football Fields of Membrane - Strategy, Results and Lessons Learned

2016 ◽  
Vol 11 (2) ◽  
pp. 266-272
Author(s):  
J. Grundestam
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Action Plan ◽  
Lessons Learned ◽  
Residential Areas ◽  
The Baltic Sea ◽  
The Baltic ◽  
The City ◽  
The Eu

Stockholm is currently one of Europe’s fastest growing cities, with its population increasing by approximately 1.5% per year, corresponding to 15,000 to 20,000 people. Sweden’s commitment to the Baltic Sea Action Plan and the EU Water Directive will lead to more stringent effluent requirements (6 mg-Tot-N/l, 0.2 mg-Tot-P/l and 6 mg-BOD7/l), and wastewater treatment in Stockholm will require major investment to handle these challenges. As Stockholm Vatten’s two wastewater treatment plants (WWTPs) – Bromma, 320,000 people, and Henriksdal, 780,000 people – are both located in or near residential areas in the city, plant development must be coordinated with its needs on economic, political, sustainable and long-term bases. Both WWTPs being facilities located underground also pose a challenge for any extension works.

Upgrading of Wastewater Treatment Plants for the Reduction of Nitrogen and Phosphorus in Schleswig-Holstein, FRG

1990 ◽  
Vol 22 (7-8) ◽  
pp. 69-76
Author(s):  
C. F. Seyfried ◽  
E. Dammann
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Trickling Filter ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
The North ◽  
The North Sea ◽  
Standard Values ◽  
The Baltic ◽  
Activated Sludge Processes

In order to solve the problems occurring in the North Sea and the Baltic Sea, programmes for the reduction of nutrients in wastewater treatment plants were initiated in the Schleswig-Holstein region. In 1988, all wastewater treatment plants with capacities greater than 17 000 population equivalents were upgraded for phosphate reduction, to give effluent concentrations of less than 2 mg P/l. By 1995, standard values of Ntot < 10 mg/l and P < 0.5 mg/l are expected. Designs for the expansion of several wastewater treatment plants are presented in this paper. In particular, the problems which result from seasonal peaks, high phosphorus concentrations, and the combination of trickling filter and activated sludge processes are discussed.

scholarly journals Trends, insights and effects of the Urban Wastewater Treatment Directive (91/271/EEC) implementation in the light of the Polish coastal zone eutrophication

2021 ◽  
Vol 67 (2) ◽  
pp. 342-354
Author(s):  
Michał Preisner ◽  
Marzena Smol ◽  
Dominika Szołdrowska
Keyword(s):  
Wastewater Treatment ◽  
Baltic Sea ◽  
Algal Blooms ◽  
Municipal Wastewater ◽  
Nutrient Concentrations ◽  
Urban Wastewater ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
The Baltic ◽  
Urban Wastewater Treatment

AbstractThe intensification of the Baltic Sea eutrophication is associated with the increase of anthropogenic nutrients loads, mainly nitrogen and phosphorus introduced into surface waters from a diffuse, point and natural background sources. Despite the observed decreasing trends in nutrient concentrations in some parts of the Baltic Sea, eutrophication-related indicators continue to deteriorate. This accelerates harmful algal blooms and dissolved oxygen deficits resulting in severe ecosystem disturbance. The paper presents trends, insights and effects of the Urban Wastewater Treatment Directive 91/271/EEC implementation in Poland based on the nutrient riverine loads from Polish territory with particular attention given to the development of municipal wastewater treatment plants under the National Wastewater Treatment Programme 2003–2016. Environmental effects of wastewater infrastructure modernisation are investigated by using available data on the changing nutrient concentrations in the coastal water in 3 basins (Gdansk Basin, Bornholm Basin and Eastern Gotland Basin) belonging to the Polish Exclusive Economic Zone within the Baltic Sea. The results show that the decreasing trend regarding phosphorus loads reduction from municipal effluents was achieved while a stable trend with temporary increases was achieved in terms of nitrogen loads. Moreover, the investigation provides information about the potential bioavailability of discharged effluents before and after the Directive implementation by including total and inorganic forms of nitrogen and phosphorus in the analysis.

scholarly journals Towards recommendations for design of wetlands for post-tertiary treatment of waste water in the baltic sea region: Gdańsk case study

2017 ◽  
Author(s):  
Sylvia Waara ◽  
Magdalena Gajewska ◽  
Jolanta Dvarioniene ◽  
Per Magnus Ehde ◽  
Ryszard Gajewski ◽  
...  
Keyword(s):  
Waste Water ◽  
Baltic Sea ◽  
Wastewater Treatment Plants ◽  
New Technology ◽  
Field Studies ◽  
Urban Landscapes ◽  
Tertiary Treatment ◽  
The Baltic Sea ◽  
Baltic Sea Region ◽  
The Baltic

There are many challenges that need to be addressed if the far reaching objectives on high environmental status as required in the EU Water Framework Directive and the Marine Strategy Framework Directive will be met in the Baltic Sea Region within the next decade. For wastewater treatment plants (WWTP) this implies, in spite of the many improvements made during the last decade, development and introduction of new technology to further reduce eutrophying compounds, hazardous chemicals and pharmaceuticals. Constructed wetlands when properly designed and operated have been shown to be robust systems with low energy requirements that may not only reduce many types of pollutants but may also provide many additional ecosystem services beyond requirements generally imposed by authorities. For example, they may support and enhance biodiversity and be used to convert brownfield areas in urban landscapes to recreational areas. Reduced cost is possible if treated water is reused in industry or for irrigation. In a project, supported by the Swedish Institute, a group of scientists, a water company and water using industry has together with local authorities through workshops, field studies and literature studies worked on finding a general first recommendation on design and operation. In this paper we will present the scientific rational and legal constraints for the general design and operation of a wetland system for post-tertiary treatment of waste water from WWTPs using Gdańsk as an example. The proposal includes a first part, which mainly will be focusing on pollutant and pathogen removal using particle traps and a HSSF wetland on land owned by the WWTP and a second part consisting of a FWS wetland which, in addition to further polishing the water, will enhance biodiversity and provide recreational areas on derelict land owned by the city.

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