The use of constructed wetland to treat civil wastewater is become a widespread method. It is also true that in the last decade this particular technique is becoming more familiar with industrial wastewater treatment. A CW plant used to process the cheese factory washing water provide a discrete quantity of vegetable biomass several times during the year. When the main pollutant is organic based, the final destination of the cut upper side of the plants, could be the anaerobic digestion. In this study was taken under consideration the possibility to use this kind of biomass as a seasonal feed for the anaerobic digestion process. This may allow optimization of the reactor feeding regime and gradually/partially substitute paid biomass with less expensive one. In the experiment was used a self-made 128 L AD pilot plant, already used for similar experiences. With this instrument can be correctly estimate the biogas and methane yield under batch, fed-batch and continuous regime. The test was conducted starting from a situation that simulate a real anaerobic reactor working phase. This start-up stage was conducted loading 50 Kg of cattle slurry mixed with 5 Kg of digestate. Sufficient quantity of Phragmites Australis plants, from Morgex (Aosta – Italy) cheese factory wastewater treatment plant, where harvested and then dried at about 30 °C for almost a month and then mechanically chopped at about 1.5 mm. When acceptable steady state were reached (methane quality exceeds 50% of the produced biogas) inside the reactor, the second stage of the experience was performed. The biomass initially loaded was been gradually substitute with an appropriate percentage of cow manure, cheese whey and chopped phragmites. COD behavior, methane and biogas yields, pH, temperatures, and pressure trends were analyzed.

What we can do with the constructed wetland vegetable biomass ? / Comino, Elena; Riggio, VINCENZO ANDREA; Rosso, Maurizio. - (2012). (Intervento presentato al convegno EcoSummit 2012 - Ecological Sustainability Restoring the Planet's Ecosystem Services. tenutosi a Columbus (USA) nel 30/09/2012-05/10/2012).

What we can do with the constructed wetland vegetable biomass ?

COMINO, ELENA;RIGGIO, VINCENZO ANDREA;ROSSO, MAURIZIO
2012

Abstract

The use of constructed wetland to treat civil wastewater is become a widespread method. It is also true that in the last decade this particular technique is becoming more familiar with industrial wastewater treatment. A CW plant used to process the cheese factory washing water provide a discrete quantity of vegetable biomass several times during the year. When the main pollutant is organic based, the final destination of the cut upper side of the plants, could be the anaerobic digestion. In this study was taken under consideration the possibility to use this kind of biomass as a seasonal feed for the anaerobic digestion process. This may allow optimization of the reactor feeding regime and gradually/partially substitute paid biomass with less expensive one. In the experiment was used a self-made 128 L AD pilot plant, already used for similar experiences. With this instrument can be correctly estimate the biogas and methane yield under batch, fed-batch and continuous regime. The test was conducted starting from a situation that simulate a real anaerobic reactor working phase. This start-up stage was conducted loading 50 Kg of cattle slurry mixed with 5 Kg of digestate. Sufficient quantity of Phragmites Australis plants, from Morgex (Aosta – Italy) cheese factory wastewater treatment plant, where harvested and then dried at about 30 °C for almost a month and then mechanically chopped at about 1.5 mm. When acceptable steady state were reached (methane quality exceeds 50% of the produced biogas) inside the reactor, the second stage of the experience was performed. The biomass initially loaded was been gradually substitute with an appropriate percentage of cow manure, cheese whey and chopped phragmites. COD behavior, methane and biogas yields, pH, temperatures, and pressure trends were analyzed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2504387
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