Significance of indicator bacteria in a regionalised wastewater treatment plant and receiving waters

2001 ◽  
Vol 15 (4) ◽  
pp. 461 ◽  
Author(s):  
D. Manville ◽  
E.J. Kleintop ◽  
B.J. Miller ◽  
E.M. Davis ◽  
J.J. Mathewson ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Indicator Bacteria ◽  
Receiving Waters

scholarly journals The importance of pollutional loads during wet weather

2019 ◽  
pp. 271-282
Author(s):  
Oddvar Georg Lindholm ◽  
Lars Aaby
Keyword(s):  
Time Series ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
The Other ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Receiving Waters ◽  
Wet Weather ◽  
Annual Discharge

Wet weather discharges consist mainly of washed out surface pollution in separate sewered areas, but in combined sewered areas; resuspended pipe deposits, surface washoff and sewage, discharging via combined sewer overflows (CSOs). Of the three mentioned sources, resuspended pipe solids is dominating over the other two and may contribute as much as 50 to 90 % of the total amount of the CSO. The CSO in a normal catchment may also on an annual bases be of the same amount, or even twice as much as the effluent from the wastewater treatment plant (WWTP). If the receiving waters are vulnerable to shock loads on a daily base, it is important to be aware that the amount of CSO might, at its most adverse be up to I 00 times more than the effluent from the WWTP during a day. The annual discharge via CSOs in a catchment may easily vary with a factor of up to 8 from the driest to the wettest year, during time series of 20 to 40 years.

scholarly journals Analysis of Combined Sewer Flow Storage Scenarios Prior to Wastewater Treatment Plant

2018 ◽  
Vol 25 (4) ◽  
pp. 619-630 ◽  
Author(s):  
Grażyna Sakson ◽  
Marek Zawilski ◽  
Agnieszka Brzezińska
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Storage Tank ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Real Time Control ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Receiving Waters ◽  
Wet Weather

Abstract Combined sewer systems in cities are increasingly equipped with additional storage facilities or other installations necessary for keeping the wastewater treatment plants from overloading during wet weather and reducing combined sewer overflows into receiving waters. Effective methods for reducing such negative phenomena include the temporary storage of wet weather flow in an end-of-pipe separate tank or in a sewer system. In this paper, four scenarios of wastewater storage for the Group Wastewater Treatment Plant (GWWTP) in Lodz (Poland) have been analysed: a storage in a separate single tank located in GWWTP, a storage in the bypass channel in GWWTP, in-sewer storage, and a combination of the aforementioned variants, also with real time control (RTC) system introduced. The basic calculations were performed using the EPA’s SWMM software for the period of 5 years (2004-2008). The chosen solution - storage in a separate storage tank - has been verified based on the inflow dataset from the years 2009-2013. The specific volume of the separate storage tank should be at least 22 m3 per hectare of impervious catchment area, but it could be reduced if additional in-sewer storage with RTC were introduced. Both options allow the effective protection of receiving waters against discharge of untreated sewage during wet weather.

scholarly journals Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil

2008 ◽  
Vol 51 (1) ◽  
pp. 153-162 ◽  
Author(s):  
Isaac Rodrigues Santos ◽  
Ronaldo Cataldo Costa ◽  
Ubiratan Freitas ◽  
Gilberto Fillmann
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Southern Brazil ◽  
Nutrient Distribution ◽  
Patos Lagoon ◽  
Wwtp Effluent ◽  
Nutrient Emission ◽  
Receiving Waters

The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxygen demand, and conductivity values were significantly higher downstream from the Wastewater Treatment Plant (WWTP) effluents. Further downstream, nitrate concentrations were higher due to ammonium nitrification, organic matter remineralization and/or the occurrence of unidentified sources. Per capita nutrient emission factors were estimated to be 0.16 kg P.yr-1 and 4.14 kg N.yr-1. Under pristine conditions, low N:P ratios were observed, which were significantly increased downstream due to the high ammonium input. The mixing zone of the nitrogen-rich waters from Vieira creek with the phosphorus-enriched waters from Patos lagoon estuary was considered under high risk of eutrophication. The results could be useful for planning and management of WWTP-effluent receiving waters in temperate regions from developing countries.

Nitrogen speciation in wastewater treatment plant influents and effluents—the US and Polish case studies

2008 ◽  
Vol 57 (10) ◽  
pp. 1511-1517 ◽  
Author(s):  
K. R. Pagilla ◽  
M. Urgun-Demirtas ◽  
K. Czerwionka ◽  
J. Makinia
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Treatment Plant ◽  
Biological Nutrient Removal ◽  
Total N ◽  
The Us ◽  
Secondary Effluents ◽  
Receiving Waters

The fate of N species, particularly dissolved organic nitrogen (DON), through process trains of a wastewater treatment plant (WWTP) was investigated. In this study, three fully nitrifying plants in Illinois, USA and biological nutrient removal (BNR) plants in northern Poland were sampled for N characterization in the primary and secondary effluents as a function of the particle size distribution. The correlations between dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) concentrations were examined. The key findings are that DON becomes significant portion (about 20%) of the effluent N, reaching up to 50% of effluent total N in one of the Polish plants. The DON constituted 56–95% of total ON (TON) in the secondary effluents, whereas in the Polish plants the DON contribution was substantially lower (19–62%) and in one case (Gdansk WWTP) colloidal ON was the dominating fraction (62% of TON). The DOC to DON ratio in the US plants is significantly lower than that in the receiving waters indicating potential for deterioration of receiving water quality. In Polish plants, the influent and effluent C:N ratios are similar, but not in the US plants.

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