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Treatment of septage in sludge drying reed beds : a case study on pilot-scale beds
2008
Troesch, S. | Liénard, A. | Molle, Pascal | Merlin, Gerard | Esser, D.
French legislation requires, the control of private on-site sanitation systems by local authorities. This will result in a large increase of the quantity of sludge from septic tanks to be treated. Nevertheless, large wastewater treatment plants are not systematically able to treat this sludge because they may have reached their nominal load or they are not so numerous in rural zone to avoid too long transportation. The study concerns both, the feasibility of sludge reed beds devoted to the treatment of septage and the assessment of a simultaneous treatment with aerated sludge. The experiments have been carried out on eight pilot-scale drying reed beds (2m²) planted with Phragmites australis. Two filtration layers of either vegetal compost or sand were tested. The study is focused on the commissioning period (first vegetative year) with a loading rate of 30 kgSS.m-2.yr-1. According to these operational conditions, dewatering efficiencies reached approx. 30% DM during summer but less than 20%DM in winter for each filtration layer and sludge. High removal efficiencies, with an average of 96%, 92% and 89% for SS, COD and TKN respectively, were achieved with septage whereas they were lower for the mixture of aerated sludge and septage. The dewaterability of septage and its filtration behaviour were assessed by several parameters (Capillary Suction Time, bound water) which may be some interesting tools for an optimised loading strategy.
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1992
Vom Baur, M. | Baack, H. (Schwarting GmbH, Flensburg (Germany))
Energy from crop-grown biomass
1992
Stewart, D.J. (Ministry of Agriculture and Fisheries, Dunedin (New Zealand). Invermay Agricultural Centre)
Biomethanation of slaughterhouse wastes in pilot-scale
1992
Tritt, W.P. | Baader, W.
Joint municipal and semichemical pulping waste treatment
0001
Anaerobic treatment of wastewater from yeast manufacturing in UASB Upflow Anaerobic Sludge Blanket factories at laboratory and pilot plant scale
1994
Vinas, M. | Martinez, J. | Borzacconi, L. | Hernandez, A. | Mallo, M. (Instituto de Ingenieria Quimica, Montevideo (Uruguay). Facultad de Ingenieria)
Anaerobic treatment of organic waste in an urban/rural circulation system
1994
Thyselius, L. | Edstrom, M. (Swedish Inst. of Agricultural Engineering, Uppsala (Sweden))
Development of a pilot plant to demonstrate removal of carbonaceous, nitrogenous, and phosphorus materials from anaerobic digester supernatant and related process streams
1970
Bennett, George E.
