NUTRIENT REMOVAL IN A WET DETENTION POND WITH BAFFLE DIKE - A CASE STUDY OF THE CEDAR RIVER PROJECT

2018 ◽  
Vol 17 (9) ◽  
pp. 2221-2228
Author(s):  
Christopher J. Brown ◽  
Killian Eckert ◽  
Greg McGrath ◽  
Shayne Wood
Keyword(s):  
Nutrient Removal ◽  
Detention Pond ◽  
Wet Detention Pond

Performance and Modelling of a Highway Wet Detention Pond Designed for Cold Climate

2009 ◽  
Vol 44 (3) ◽  
pp. 253-262 ◽  
Author(s):  
Jes Vollertsen ◽  
Svein Ole Åstebøl ◽  
Jan Emil Coward ◽  
Tor Fageraas ◽  
Asbjørn Haaning Nielsen ◽  
...  
Keyword(s):  
Rate Constants ◽  
Pond Water ◽  
Pollutant Removal ◽  
Cold Climate ◽  
Traffic Load ◽  
Substantial Part ◽  
First Order ◽  
Detention Pond ◽  
Time Of Year ◽  
Wet Detention Pond

Abstract A wet detention pond in Norway has been monitored for 12 months. The pond receives runoff from a highway with a traffic load of 42,000 average daily traffic. Hydraulic conditions in terms of inflow, outflow, and pond water level were recorded every minute. Water quality was monitored by volume proportional inlet and outlet samples. During most of the year, excellent pollutant removal was achieved; however, during two snowmelt events the pollutant removal was poor or even negative. The two snowmelt events accounted for one third of the annual water load and for a substantial part of the annual pollutant discharge. The performance of the pond was analyzed using a dynamic model and pollutant removal was simulated by first-order kinetics. Good agreement between measurement and simulation could be achieved only when choosing different first-order rate constants for different parts of the year. However, no relation between the rate constants obtained and the time of year could be identified, and neither did the rate constants for different pollutants correlate. The study indicates that even detailed measurements of pollutant input and output allow only average performance to be simulated and are insufficient for simulating event-based variability in pond performance.

Environmental Impacts of Nutrient Removal Processes: Case Study

1997 ◽  
Vol 123 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Mark C. M. van Loosdrecht ◽  
Takahiro Kuba ◽  
Henry M. van Veldhuizen ◽  
Frank A. Brandse ◽  
Joseph J. Heijnen
Keyword(s):  
Environmental Impacts ◽  
Nutrient Removal ◽  
Removal Processes

Sewage-treatment under substantial load variations in winter tourism areas – a full case study

2004 ◽  
Vol 50 (7) ◽  
pp. 147-155 ◽  
Author(s):  
S. Winkler ◽  
N. Natsché ◽  
T. Gamperer ◽  
M. Dum
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Sewage Treatment ◽  
Activated Sludge Process ◽  
Two Stage ◽  
Winter Tourism ◽  
Load Variations ◽  
Sudden Load

The sewage-load variations in winter tourism areas are characterized by sudden increases - in the ange of a factor two to three - within only a few days at the start and the end of the tourist season, especially at Christmas. The sudden load increases occur during periods of low wastewater temperatures, which is an additional demanding factor with respect to nitrogen removal. A full case study was carried out at WWTP Saalfelden, which is located near one of Austria's largest skiing resorts. The plant is designed for 80,000 PE and built according to the HYBRID®-concept, which is a special two stage activated sludge process for extensive nutrient removal.

Go or no go for gel entrapped nitrifiers? A Belgian case study

2002 ◽  
Vol 46 (1-2) ◽  
pp. 465-471 ◽  
Author(s):  
D. Geenens ◽  
C. Jonkers ◽  
C. Thoeye
Keyword(s):  
European Union ◽  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Nitrifying Bacteria ◽  
Fine Bubble ◽  
Environmental Requirements ◽  
Pilot Tests

In the coming years, as stricter environmental requirements are imposed, many European Union wastewater treatment plants (WWTP) need to be expanded and/or upgraded. This requires considerable investments. Optimising the renovation recourses can lead to significant savings. The use of entrapped nitrifying bacteria for upgrading of WWTP towards nutrient removal may be benificial. Long term pilot tests were performed to evaluate a so-called pellet reactor. Differences in performance and microbiological composition of classical activated sludge and the pellet reactor were investigated. FISH analyses showed (i) absence of Nitrobacter cells and (ii) high abundance of Nitrospira in the pilot reactors. Two Belgian WWTP make use of fine bubble aeration and could – theoretically – easily be renovated towards nitrogen removal using encapsulated nitrifiers. Financial aspects are commented on.

scholarly journals Strategies for achieving energy neutrality in biological nutrient removal systems – a case study of the Slupsk WWTP (northern Poland)

2016 ◽  
Vol 75 (3) ◽  
pp. 727-740 ◽  
Author(s):  
Ewa Zaborowska ◽  
Krzysztof Czerwionka ◽  
Jacek Makinia
Keyword(s):  
Nutrient Removal ◽  
Operating Cost ◽  
Treatment Plant ◽  
Electric Energy ◽  
Energy Deficit ◽  
Biological Nutrient Removal ◽  
Reject Water ◽  
Northern Poland ◽  
The City

The paper presents a model-based evaluation of technological upgrades on the energy and cost balance in a large biological nutrient removal (BNR) wastewater treatment plant (WWTP) in the city of Slupsk (northern Poland). The proposed upgrades include chemically enhanced primary sludge removal and reduction of the nitrogen load in the deammonification process employed for reject water treatment. Simulations enabled to estimate the increased biogas generation and decreased energy consumption for aeration. The proposed upgrades may lead the studied WWTP from the energy deficit to energy neutrality and positive cost balance, while still maintaining the required effluent standards for nitrogen. The operating cost balance depends on the type of applied coagulants/flocculants and specific costs of electric energy. The choice of the coagulant/flocculent was found as the main factor determining a positive cost balance.

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