Temat: leachate pretreatment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Podczyszczanie odcieków składowiskowych z wykorzystaniem procesu Fentona, koagulacji i ozonowania
Pretreatment of landfill leachate using Fenton reaction, coagulation and ozonation
Autorzy:: Leszczyński, J.
Wawrentowicz, D.
Powiązania:: https://bibliotekanauki.pl/articles/95781.pdf
Data publikacji:: 2015
Wydawca:: Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:: proces Fentona
odcieki ze składowisk
ozonowanie
koagulacja-flokulacja
obróbka wstępna
Fenton process
landfill leachate
ozonation
coagulation-flocculation
pretreatment
Opis:: Celem badań było określenie skuteczności podczyszczania odcieków składowiskowych z wykorzystaniem koagulacji, ozonowania i reakcji Fentona.
The objective of the research was to study coagulation-flocculation, ozonation and Fenton’s process pretreatment on a stabilized landfill leachate. The leachate came from a municipal sanitary landfill, located near Bielsk Podlaski, (Podlaskie viovodeship). Main parameters were at average: pH 7,69; COD 1125 mgO₂/dm³; BOD 143 mgO₂/dm³; NH₄+ 658 mgN/dm³; UV absorbance 0,326 and turbidity 59 NTU. An individual and integrated technique consisted of coagulation, Fenton’s reaction, ozonation and coagulation / ozonation was examined. The coagulation of leachate samples was accomplished by addition of Iron(III) sulfate. Maximum COD, color and UV absorbance removal rates at 44,8%, 75,5% and 67% were achieved by adding of 350 mgFe/dm³ of Iron(III) sulfate as Fe₃₊ respectively. The ozone dosages were used in the range of 50 to 750 mgO₃/dm³ of the leachate. The maximum COD, color and UV absorbance removal was respectively 23,3%; 30,2% and 27,9% by applying a high ozone dose of 750 mgO₃/dm³. After oxidation, the ratio of BOD /COD was increased from 0.11 up to 0.16. Fenton process reduced the COD, color and UV absorbance of the leachates by 64,9; 81,1and 68,7% respectively. Best operative conditions were obtained with Iron(III) sulfate dose 150 mgFe/dm³, and maximum hydrogen peroxide dose 2100 mgH₂O₂/dm³ (reaction time: 2h). Advantages associated with Fenton’s reagent include higher organic removal capacity, and bigger production of biodegradable byproducts, measured as BOD/COD ratio.
Źródło:: Ekonomia i Środowisko; 2015, 2; 166-175
0867-8898
Pojawia się w:: Ekonomia i Środowisko
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The Role of Boron-Doped Diamond and Platinum Anodes in the Three-Compartment Electrochemical Pretreatment of Stabilized Landfill Leachate – Response Surface Methodological Approach
Autorzy:: Bagastyo, Arseto Yekti
Anggrainy, Anita Dwi
Rosyidah, Badriyah
Powiązania:: https://bibliotekanauki.pl/articles/2202300.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: boron-doped diamond
electrochemical process
leachate pretreatment
platinum
response surface methodology
Opis:: Stabilized landfill leachate contains high fractions of refractory organics that cannot be effectively degraded by simple biological or physicochemical treatment. Thus, primary treatment was required to improve biodegradability and enhance treatment efficiency. This study investigated the role of Boron-Doped Diamond (BDD) and platinum (Pt) anodes at a current density of 29.2 and 33.3 mA/cm2 in the electrochemical processes for the pretreatment of stabilized leachate. A three-compartment electrochemical reactor was used in the research to enhance the removal of ionic pollutants. The pollutants were measured as total dissolved solids (TDS), chemical oxygen demand (COD), ammonium-nitrogen (NH4–N), and nitrite (NO2–). The reactor performance was then analyzed using a regular two-level factorial design. The results showed that the electrochemical process effectively removed organic and inorganic pollutants. The highest removal was obtained at 33.3 mA/cm2 using the BDD, measured around 48, 82, 60, and 79% for TDS, COD, NH4–N, and NO2–, respectively. Meanwhile, the specific energy consumption for COD removal was estimated to reach 1.5 and 1.55 Wh/g for BDD and Pt, respectively. These results imply that the type of anodes and applied current densities significantly influence the treatment efficiency.
Źródło:: Journal of Ecological Engineering; 2022, 23, 12; 50--60
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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