Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Application of Anaerobic Hybrid Filters for Sewage Treatment
This chapter examines the feasibility of treating municipal wastewater by an anaerobic hybrid filter (AHF) under subtropical or Mediterranean temperature conditions, reporting the state of the art of main anaerobic reactors by focusing on their advantages and drawbacks.
It includes widespread laboratory work using AHF with one- and two-packing media operated at 35°C, 25°C, 20°C, and 15°C, and hydraulic retention times (HRT) ranging from 10 to 48 h. High removal efficiencies of chemical oxygen demand (COD) (78–90%) and total suspended solids (TSS) (77–85%) were achieved at HRT under 12 h and 15°C. The fixed media acted like a semi-permeable membrane, ensuring a stable specialized biologic sludge in the upper medium and bottom of the reactors.
It also presents a full-scale case study on sewage treatment of 7,500 inhabitants, using AHF combined with trickling filters (TF). The AHF started-up easily without special seeding, performed with stability, even in adverse flowrate and temperature conditions. Minimum COD removal efficiency (58%) was recorded at 15°C. Overall treatment performance was 82–88% of COD and 27–35% nitrogen removal. Pollutant concentrations meet lax environmental limits and could fulfill strict legislation.
Electricity consumption (30 kWh/day) corresponds to 12.5% of COD aerobic oxidation. Biogas produced by anaerobic degradation is methane rich (80–90%) with low hydrogen sulfide content. These results demonstrate that AHF systems have potential in the pre-treatment/treatment of municipal wastewater under subtropical–temperature conditions. This technology is robust, economic, efficient, and easy to operate.
Application of Anaerobic Hybrid Filters for Sewage Treatment
This chapter examines the feasibility of treating municipal wastewater by an anaerobic hybrid filter (AHF) under subtropical or Mediterranean temperature conditions, reporting the state of the art of main anaerobic reactors by focusing on their advantages and drawbacks.
It includes widespread laboratory work using AHF with one- and two-packing media operated at 35°C, 25°C, 20°C, and 15°C, and hydraulic retention times (HRT) ranging from 10 to 48 h. High removal efficiencies of chemical oxygen demand (COD) (78–90%) and total suspended solids (TSS) (77–85%) were achieved at HRT under 12 h and 15°C. The fixed media acted like a semi-permeable membrane, ensuring a stable specialized biologic sludge in the upper medium and bottom of the reactors.
It also presents a full-scale case study on sewage treatment of 7,500 inhabitants, using AHF combined with trickling filters (TF). The AHF started-up easily without special seeding, performed with stability, even in adverse flowrate and temperature conditions. Minimum COD removal efficiency (58%) was recorded at 15°C. Overall treatment performance was 82–88% of COD and 27–35% nitrogen removal. Pollutant concentrations meet lax environmental limits and could fulfill strict legislation.
Electricity consumption (30 kWh/day) corresponds to 12.5% of COD aerobic oxidation. Biogas produced by anaerobic degradation is methane rich (80–90%) with low hydrogen sulfide content. These results demonstrate that AHF systems have potential in the pre-treatment/treatment of municipal wastewater under subtropical–temperature conditions. This technology is robust, economic, efficient, and easy to operate.
Application of Anaerobic Hybrid Filters for Sewage Treatment
Hdb Environm.Chemistry
Nasr, Mahmoud (Herausgeber:in) / Negm, Abdelazim M. (Herausgeber:in) / Di Berardino, Santino Eugenio (Autor:in) / Di Berardino, Monica Alexandra (Autor:in)
18.04.2022
42 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Aggregated biomass , AHF reactor , Anaerobic hybrid filter , Biogas production , Low temperature , Methane , Municipal wastewater , Trickling filter , UASB reactor Environment , Environmental Chemistry , Water, general , Ecology , Biotechnology , Applied Microbiology , Sustainable Development , Chemistry and Materials Science
Anaerobic filters for on-site sewage treatment
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