Wszystkie pola: Wojciechowska, E. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Doświadczenia z eksploatacji pilotowej hydrofitowej oczyszczalni odcieków ze składowiska odpadów komunalnych w zależności od reżimu hydraulicznego
Autorzy:: Wojciechowska, E.
Powiązania:: https://bibliotekanauki.pl/articles/401262.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: odcieki składowiskowe
oczyszczalnie hydrofitowe
denitryfikacja
landfill leachate
constructed wetlands
denitrification
Opis:: W artykule przedstawiono doświadczenia z 2-letniej eksploatacji pilotowego obiektu hydrofitowego do oczyszczania odcieków ze składowiska odpadów komunalnych w Chlewnicy (woj. pomorskie). W skład obiektu wchodzi zbiornik początkowy odcieków oraz 3 złoża o przepływie podpowierzchniowym - w dwóch początkowych złożach przepływ ścieków jest pionowy (VSSF), w trzecim złożu zaś - poziomy (HSSF). Obiekt został uruchomiony w lipcu 2008. Po pierwszym okresie wpracowania (do końca jesieni 2008), w roku 2009 osiągnięto bardzo wysokie efektywności usuwania zanieczyszczeń, wynoszące 87% dla ChZT, 95,4% dla BZT5, ponad 99% dla azotu amonowego, 98% dla azotu ogólnego i 72% dla zawiesiny ogólnej. W sezonie wegetacyjnym 2010 zmieniono warunki hydrauliczne pracy obiektu, co spowodowało spadek efektywności usuwania zanieczyszczeń. Nastąpiło zahamowanie denitryfikacji na złożu HSSF. W pracy omówiono skład odcieków podawanych na złoża oraz efektywność ich oczyszczania w różnych warunkach hydraulicznych.
In the article the experiences from 2 years operation of a pilot constructed wetland (CW) for landfill leachate treatment in Chlewnica (Pommerania Region) are presented. The CW consists of a preliminary sedimentation tank and 3 subsurface flow beds: 2 beds with vertical flow (VSSF) and the last one with horizontal flow (HSSF). The CW was put in operation in July 2008. After the start-up period (until autumn 2008), in 2009 very high treatment efficiencies were observed: 87% for COD, 95,4% for BOD5, 99% for ammonia nitrogen, 98% for total nitrogen and 72% for TSS. In 2010 the hydraulic conditions in the CW were changed, resulting in the decrease of treatment efficiencies. The denitrification process at the HSSF bed was stopped. In the article the composition of leachate and treatment efficiencies at different hydraulic conditions are discussed.
Źródło:: Inżynieria Ekologiczna; 2011, 25; 176-188
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Usuwanie związków azotu z odcieków składowiskowych w pilotowej oczyszczalni hydrofitowej
Removal of Nitrogen Compounds from Landfill Leachate in Pilot Constructed Wetlands
Autorzy:: Wojciechowska, E.
Powiązania:: https://bibliotekanauki.pl/articles/1818568.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: odcieki składowiskowe
azot amonowy
oczyszczanie odcieków
nitryfikacja
denitryfikacja
oczyszczalnie hydrofitowe
landfill leachate
ammonia nitrogen
leachate treatment
nitrification
denitrification
constructed wetlands
Opis:: Landfill leachate contains very high concentrations of ammonia nitrogen and COD. At the same time, BOD5 concentrations are quite low, which makes leachate treatment one of the most difficult and up-to-date problems of environmental engineering. In the recent years constructed wetlands are applied for landfill leachate treatment, alone or as one of treatment stages. The experiences from USA, Canada and Europe (Norway, United Kingdom, Slovenia, Sweden) show good removal efficiencies of surface flow systems (SF). Horizontal subsurface flow systems (HSSF) are less effective. At present the application of vertical flow subsurface beds (VSSF) for landfill leachate treatment is investigated. The vertical flow beds advantage are good conditions for nitrification of ammonia nitrogen. In the article the processes of nitrogen transformation and removal from landfill leachate in a pilot multi-stage constructed wetland consisting of two vertical subsurface flow beds (VSSF-1 and VSSF-2) followed by a horizontal subsurface flow bed (HSSF) were analyzed. The set-up of a pilot system was designed to treat high concentrations of ammonia nitrogen present in the leachate and to provide conditions for the sequence of nitrogen transformation processes (ammonification – nitrification – denitrification). The results from three research periods were discussed. In each period the operational conditions were changed. Different hydraulic loadings, leachate composition (with or without addition of municipal wastewater) and different operation conditions of vertical flow beds were applied. The total nitrogen removal effectiveness varied from 65 to 98%. Nitrification of ammonia nitrogen took place in the vertical flow beds, however the process was incomplete due to too high ammonia nitrogen concentrations in the raw leachate. Denitrification of nitrates in the last bed with horizontal flow of leachate was the limiting process. Quite high concentrations of nitrates were still present in the outflow from the bed. The reason for denitrification inhibition was deficiency of labile organic matter in the leachate inflowing to the HSSF bed. The conclusions for further applications were to use a hydrophyte pond instead of HSSF bed as the last stage of treatment which would increase the amount of easily decomposable organic matter form plant detritus. Also stripping of ammonia nitrogen before the inflow to constructed wetland would increase treatment effectiveness.
Źródło:: Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 2; 1484-1497
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Usuwanie związków azotu z odcieków składowiskowych w pilotowej oczyszczalni hydrofitowej
Removal of Nitrogen Compounds from Landfill Leachate in Pilot Constructed Wetlands
Autorzy:: Wojciechowska, E.
Powiązania:: https://bibliotekanauki.pl/articles/1818569.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: odcieki składowiskowe
azot amonowy
oczyszczanie odcieków
nitryfikacja
denitryfikacja
oczyszczalnie hydrofitowe
landfill leachate
ammonia nitrogen
leachate treatment
nitrification
denitrification
constructed wetlands
Opis:: Landfill leachate contains very high concentrations of ammonia nitrogen and COD. At the same time, BOD5 concentrations are quite low, which makes leachate treatment one of the most difficult and up-to-date problems of environmental engineering. In the recent years constructed wetlands are applied for landfill leachate treatment, alone or as one of treatment stages. The experiences from USA, Canada and Europe (Norway, United Kingdom, Slovenia, Sweden) show good removal efficiencies of surface flow systems (SF). Horizontal subsurface flow systems (HSSF) are less effective. At present the application of vertical flow subsurface beds (VSSF) for landfill leachate treatment is investigated. The vertical flow beds advantage are good conditions for nitrification of ammonia nitrogen. In the article the processes of nitrogen transformation and removal from landfill leachate in a pilot multi-stage constructed wetland consisting of two vertical subsurface flow beds (VSSF-1 and VSSF-2) followed by a horizontal subsurface flow bed (HSSF) were analyzed. The set-up of a pilot system was designed to treat high concentrations of ammonia nitrogen present in the leachate and to provide conditions for the sequence of nitrogen transformation processes (ammonification – nitrification – denitrification). The results from three research periods were discussed. In each period the operational conditions were changed. Different hydraulic loadings, leachate composition (with or without addition of municipal wastewater) and different operation conditions of vertical flow beds were applied. The total nitrogen removal effectiveness varied from 65 to 98%. Nitrification of ammonia nitrogen took place in the vertical flow beds, however the process was incomplete due to too high ammonia nitrogen concentrations in the raw leachate. Denitrification of nitrates in the last bed with horizontal flow of leachate was the limiting process. Quite high concentrations of nitrates were still present in the outflow from the bed. The reason for denitrification inhibition was deficiency of labile organic matter in the leachate inflowing to the HSSF bed. The conclusions for further applications were to use a hydrophyte pond instead of HSSF bed as the last stage of treatment which would increase the amount of easily decomposable organic matter form plant detritus. Also stripping of ammonia nitrogen before the inflow to constructed wetland would increase treatment effectiveness.
Źródło:: Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 2; 1484-1497
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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