Key tools to accelerate fulfilment of the EU Urban Waste Water Treatment Directive in the Flemish region of Belgium

2001 ◽  
Vol 44 (1) ◽  
pp. 7-14 ◽  
Author(s):  
P. Ockier ◽  
C. Thoeye ◽  
G. De Gueldre
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Wastewater Treatment Plants ◽  
Waste Water Treatment ◽  
Treated Wastewater ◽  
Final Phase ◽  
Urban Waste ◽  
Investment Programme ◽  
Reuse Of Treated Wastewater ◽  
The Eu

The EU Urban Waste Water Treatment Directive (UWWTD) has been transposed in 1992. The whole area of the Flemish region was designated as a sensitive area. This implies nutrient removal for all works in agglomerations of more than 10,000 population equivalent (PE). Thanks to an accelerated investment programme, which is in a final phase now, the wastewater treatment plants (WWTPs) will fulfil treatment in 2005. Key tools for a quick and economic execution of the programme are standardisation for new WWTP's and increasing computerisation for retrofitting existing WWTPs. The UWWTD also stipulates the reuse of treated wastewater and sludge. Strategies are explained.

Water reuse for irrigation from waste water treatment plants with seasonal varied operation modes

2004 ◽  
Vol 50 (2) ◽  
pp. 47-53 ◽  
Author(s):  
P. Cornel ◽  
B. Weber
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Treated Wastewater ◽  
Nitrifying Bacteria ◽  
Water Treatment Plants ◽  
Operation Modes ◽  
Waste Water Treatment Plants

Irrigation periods are usually limited to vegetation periods. The quality requirements for treated wastewater for disposal and for reuse are different. The reuse of water for irrigation allows partly the reuse of the wastewater's nutrients (N and P). Outside the irrigation period the water must be treated for disposal, thus nutrient removal is often required in order to avoid detrimental effects on the receiving surface water body. Only wastewater treatment plants with different operation modes for different seasons can realise these requirements. The nitrification is the most sensitive biological process in the aerobic wastewater treatment process. At low water temperatures the nitrifying bacteria need several weeks to re-start full nitrification after periods without NH4-removal. Therefore it is necessary to develop options for waste water treatment plants which allow a fast re-start of the nitrification process. Based on theoretical considerations and computer simulations of the activated sludge treatment process, one possibility for implementing a wastewater treatment plant with different seasonal operation modes is evaluated.

scholarly journals Ecological/economical and Organizational/legal Problems of Transition to the System of Water Quality Regulation on the Basis of the Best Available Techniques

2014 ◽  
pp. 120-130
Author(s):  
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Waste Waters ◽  
Urban Waste ◽  
Best Available Techniques ◽  
Treatment Techniques ◽  
Quality Regulation ◽  
Legal Problems

Analysis of possibilities of the existing urban waste water treatment techniques has been presented. It is mentioned that the problem of the beat available techniques choice is inseparably linked with correction of the current normalizing system in terms of composition of not only treated waste waters but also in terms of requirements to enterprises that dispose water into a sewage network.

scholarly journals Types of water bodies receiving wastewater discharge (2011-2012)

2017 ◽  
Author(s):  
Chloé Meyer
Keyword(s):  
Waste Water ◽  
European Union ◽  
Water Treatment ◽  
Adverse Effects ◽  
Union Member ◽  
Waste Water Treatment ◽  
Wastewater Discharge ◽  
Urban Waste ◽  
Industrial Sectors ◽  
European Union Member States

This layer presents wastewater discharge points and the type of water body in which used water is discharged. Those data were collected from the reporting of European Union Member States, as part of the Urban Waste Water Treatment Directive (UWWTD) implementation. The Directive concerns the collection, treatment and discharge of urban waste water and the treatment and discharge of waste water from certain industrial sectors. Its objective is to protect the environment from the adverse effects of the above mentioned waste water discharges. For more information, visit the UWWTD waterbase website: www.eea.europa.eu/data-and-maps/data/waterbase-uwwtd-urban-waste-water-treatment-directive-4#tab-european-data Basin Pollution Quality Waste

scholarly journals ENZYMATIC WASTE WATER TREATMENT

World Science ◽  
2021 ◽  
Author(s):  
Nancey Hafez
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Metal Ions ◽  
Wastewater Treatment Plants ◽  
Waste Water Treatment ◽  
High Energy ◽  
Enzymatic Reactions ◽  
Biological Interactions ◽  
Physico Chemical

Enzymes are biocatalysts provided by cells and are used in most metabolic methods. Most enzymes are consisting of proteins containing tertiary amino acid which bind to co enzyme or metal ions. Enzymes are accelerating biochemical processes by some mechanisms to chemical catalysts e.g metals, metal oxides and metal ions. Enzymes can be very effective under conditions e.g (temperature, atmospheric pressure and PH). Many enzymes have hydrolyzing, oxidizing and reducing characters. Enzymatic reactions always provide less side effects reactions and fewer waste by products. That is why microbial Enzymes can give an effective and environmental safe alternatives as metabolic inorganic chemical catalysts which can be used in all over pharmaceutical industrial processes. Enzymes are used in waste water treatment. Treatment technologies depend on physico-chemical approaches in wastewater treatment plants which require skills, high operation costs (in terms of high energy and chemical demand). Wastewater treatment is operated to protect the quality of limited freshwater resources, which are most times the final discharge points of effluents, and also, to promote the reusability of expended clean water; amounts of hazardous aromatic byproducts are still generated [3, 4]. The observation shows that wastewater treatment plants, though liable to remove microcontaminants such as heavy metals, and to a far lesser extent, aromatic contaminants, were originally structured for the removal of solid wastes, ecofriendly organic matter and eutrophication stimulants from wastewater, thereby reducing eutrophicating pollution loads; the micropollutants may only be moderately affected by the chemical, physical and biological interactions within the treatment plants.

Adaptation of the simpletreat chemical fate model to single-sludge biological nutrient removal wastewater treatment plants

1998 ◽  
Vol 38 (1) ◽  
pp. 211-218 ◽  
Author(s):  
G. Boeije ◽  
D. Schowanek ◽  
P. Vanrolleghem
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Waste Water Treatment ◽  
Biological Nutrient Removal ◽  
Treatment Technology ◽  
Chemical Fate ◽  
Sludge Recycling ◽  
Recent Developments

Many recent developments in municipal waste water treatment technology are directed towards biological nutrient removal. Chemical fate models which are used to predict the behavior of individual chemicals in waste water treatment plants (WWTPs), have until now not incorporated this aspect. In this paper, two modifications to the steady-state non-equilibrium Simple Treat modeling concept are presented. These focus on an improved description of sludge recycling, and on the presence of different redox zones in the biological reactor (aerobic, anoxic, anaerobic). The updated models were applied to three different WWTP designs, and simulation results were compared to measured values for the surfactant LAS.

scholarly journals The challenge of implementing European Union environmental law in the new member states: The Urban Waste Water Treatment Directive in the Czech Republic and Poland

2017 ◽  
Vol 35 (6) ◽  
pp. 1117-1135 ◽  
Author(s):  
Dan Marek ◽  
Michael Baun ◽  
Marcin Dąbrowski
Keyword(s):  
Waste Water ◽  
European Union ◽  
Czech Republic ◽  
Water Treatment ◽  
Goodness Of Fit ◽  
Environmental Law ◽  
Financial Burden ◽  
Waste Water Treatment ◽  
Urban Waste ◽  
The Czech Republic

This article examines the problematic implementation of the Urban Waste Water Treatment Directive (UWWTD) in the Czech Republic and Poland from the perspective of the scholarly debate on European Union (EU) and post-accession compliance, focusing on the competing ‘goodness of fit’ and administrative-legal approaches to explaining variations in compliance with EU rules. It finds that administrative shortcomings of various kinds are a major reason for implementation problems in both countries, and that problems have also stemmed from the multilevel nature of the implementation process, which places a heavy administrative and financial burden on municipalities, and requires cooperation between national and local government authorities. In the Czech case, however, the ‘misfit’ between EU standards and contracting and regulatory practices in the Czech water sector has also undermined UWWTD compliance, through its negative impact on the country's ability to access EU funding.

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