Development of an H2S emission model for wastewater treatment plants (WWTPs)

Households are an important source of nutrient loading to surface water. Sewage systems without or with only primary wastewater treatment are major polluters of surface water. Future emission levels will depend on population growth, urbanisation, increases in income and investments in sanitation, sewage systems and wastewater treatment plants. This study presents the results for two possible shared socioeconomic pathways (SSPs). SSP1 is a scenario that includes improvement of wastewater treatment and SSP3 does not include such improvement, with fewer investments and a higher population growth. The main drivers for the nutrient emission model are population growth, income growth and urbanisation. Under the SSP1 scenario, 5.7 billion people will be connected to a sewage system and for SSP3 this is 5 billion. Nitrogen and phosphorus emissions increase by about 70% under both SSP scenarios, with the largest increase in SSP1. South Asia and Africa have the largest emission increases, in the developed countries decrease the nutrient emissions. The higher emission level poses a risk to ecosystem services.

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Air emissions at large municipal wastewater treatment plants in Finland for national E-PRTR reporting register

Water Practice & Technology ◽

10.2166/wpt.2009.029 ◽

2009 ◽

Vol 4 (2) ◽

Cited By ~ 1

Author(s):

T. Fred ◽

M. Heinonen ◽

L. Sundell ◽

S. Toivikko

Keyword(s):

Wastewater Treatment ◽

Municipal Wastewater ◽

Wastewater Treatment Plants ◽

Waste Water Treatment ◽

Treatment Plant ◽

Air Emissions ◽

Emission Model ◽

Municipal Wastewater Treatment ◽

Air Emission ◽

Municipal Wastewater Treatment Plants

EC regulation (166/2006) obligates all urban waste water treatment plants above 100.000 PE in European Union area to report their water and air emissions by PRTR protocol from year 2007. There were no general rules or correlations determined to calculate or measure air emissions of municipal wastewater plant. Due to fact that major part of the treatment plants is uncovered, individual air emission study was demanding to implement. In Finland a group of large wastewater treatment plants studied PRTR air emissions based on the samples of Viikinmäki WWTP (780.000 PE), the largest wastewater treatment plant in Finland. Since Viikinmäki WWTP is completely covered, underground plant, ventilation air analyses were possible to implement in full scale. Based on this study, air emissions of Viikinmäki WWTP has been determined and reported to fulfil the PRTR protocol demands. Air emission model was accepted by Finnish Environmental Authorities and the air emission model of Viikinmäki WWTP was used by other, large Finnish WWTPs.

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Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

Pollack Periodica ◽

10.1556/606.2020.15.2.13 ◽

2020 ◽

Vol 15 (2) ◽

pp. 142-151

Author(s):

Peter Lukac ◽

Lubos Jurik

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Wastewater Treatment Plants ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Phosphorus Recovery ◽

Anaerobic Sludge ◽

Biological Phosphorus Removal ◽

The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

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