Zastosowanie reakcji Fentona do wspomagania biologicznego oczyszczania ścieków z przemysłu mleczarskiego

• Autorzy: Krzemińska D. , Neczaj E. , Parkitna K.

Warianty tytułu

EN

Application of Fenton Reaction for Supporting Biological Wastewater Treatment from the Dairy Industry

• Języki publikacji: PL

Abstrakty

EN

The dairy industry is one of the most polluting of industries, not only in terms of the volume of effluent generated, but also in terms of its characteristics as well. The composition of waste water produced in the milk processing plants depends primarily on the type of production (such as fluid milk, butter, cheese, buttermilk, whey, yogurt, condensed milk, flavored milk, milk powder, ice cream, etc.). The factors influencing the composition and charge of waste water are the raw materials used, level of technology plant, cleaning and disinfection processes and the amount of water used. Still increased pollution, combined with increased industrial activity and increasingly restrictive laws concerning discharges, focuses on the problem of optimal industry wastewater treatment. High concentration of organic matter in dairy wastewater causes problems with their removal in biological methods. Combining advanced oxidation process (AOP) and biological process has received attention in recent years as a promising alternative for industrial wastewater treatment. Among biological treatment processes the sequencing batch reactor (SBR) have been widely applied for treating dairy wastewater. The advantages of this technology can include high flexibility and ease of adaptation of operating parameters. Sequencing batch reactor is the name given to wastewater treatment systems based on activated sludge, operated on a sequence changes of anaerobic and aerobic conditions in one reactor. Using AOP pretreatment is important to improve the biodegradability and produce an effluent that can be treated biologically These processes involve the generation of highly free radicals, mainly hydroxyl radical (HO) via chemical, photochemical and photocatalytic reactions. One of the most important AOP process is Fenton reaction. Effectiveness of Fenton reaction has been confirmed in the case of pharmaceutical wastewater, treatment of brines or treatment of paper pulp manufacturing effluents. The oxidation system based on the Fenton’s reagent (hydrogen peroxide in the presence of a ferrous salt under acidic conditions) has been used for the treatment of both organic and inorganic substances of the wastewater stream. The present study was aimed to treat the dairy wastewater by Fenton’s process and an aerobic sequencing batch reactor. The first part of this study examined the effect of operating conditions on Fenton`s process pretreatment of dairy wastewater. The effectiveness of the AOP pretreatment was assessed by evaluating wastewater biodegradability enhancement (BOD<sub>5</sub>/COD), as well as monitoring major pollutant concentrations (COD) with reaction time. The optimum dose Fe<sup>2+</sup> and H<sub>2</sub>O<sub>2</sub> was found to be 1.2 and 2.0 g/L, respectively. In a single biological treatment the average removal efficiencies of COD, and NH<sub>4</sub><sup>+</sup> were 67%, and 61%, respectively. Integration of Fenton`s process and biological treatment resulted in 93% removal of COD and 79% NH₄⁺ from the dairy wastewater. The results indicated that the combined process would be a promising alternative for the treatment of dairy wastewater.

Słowa kluczowe

PL

reakcja Fentona; biologiczne oczyszczanie ścieków

EN

wastewaters; Fenton reaction

• Wydawca: Politechnika Koszalińska
• Czasopismo: Rocznik Ochrona Środowiska
• Rocznik: 2013
• Tom: Tom 15, cz. 3
• Strony: 2381--2397
• Opis fizyczny: Bibliogr. 26 poz., tab., rys.

Twórcy

autor

Krzemińska D.

• Politechnika Częstochowska

autor

Neczaj E.

• Politechnika Częstochowska

autor

Parkitna K.

• Politechnika Częstochowska

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