The process makes it possible to biologically treat olive oil mill wastewaters (OMW) at low dilution and high organic load rate in spite of their high content of inhibitory compounds, namely lipidic and phenolic ones. The process is based on combination of physical-chemical and biological (anaerobic) treatment in a single and simultaneous step. The physical-chemical part of the process is based on the addition of natural sorbents and chemicals which regulate the inhibitory compounds at non inhibitory concentration while still leaving them available for biodegradation. Thus OMW conversion to methane can be obtained at high organic load rate (up to 8.2 kg COD m-3 d-1) even though the feed is very little diluted (1:1.5). Very good performance is obtained (total COD removal : 91 %; methane yield : 0.80 g CH4 (as COD) / g removed COD; lipids removal: 98%; phenols removal: 63%). Moreover, the addition of natural sorbents and chemicals introduce neither any sophisticated reactor engineering nor treatment or disposal of concentrated or toxic side streams.
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|Titolo:||PROCESSO INTEGRATO CHIMICO-FISICO E BIOLOGICO PER IL TRATTAMENTO DI REFLUI DI FRANTOI OLEARI (ACQUE DI VEGETAZIONE, AV)|
|Anno di primo deposito:||2000|
|Appartiene alla tipologia:||05a Brevetto|