Cobiogasification of Wastepaper Products with Separately Collected Municipal Solid Waste |
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| Authors: | P Scherer R Lentz R Carra |
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| Institution: | 1. Fachhochschule Hamburg, Labor für Mikrobiologie und Biotechnologie, Hamburg, Germany;2. Procter &3. Gamble, P &4. RS Environmental Quality Department, Schwalbach, Germany;5. Biotechnische Abfallverwertung (BTA) GmbH &6. Co., Munich, Germany |
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| Abstract: | ? The treatment of soiled hygiene papers (HYP), such as diapers and sanitary napkins, added at a concentration of 10 percent (w/w) to separately collected municipal biowaste was tested at Biotechnishce Abfallverwertung (BTA)'s three stage mesophilic biogas plant in Munich. The study aimed to establish the feasibility of cobiogasification of hygiene papers and biowaste. Parameters measured were: Efficiency of plastics and inerts separation; Mass balances; Organic and inorganic dry residues; COD; C:N ratio; Heavy metal content; Bacterial counts; Fiber analysis of suspension; Residues; Effluent for hemicellulose, cellulose and lignin; Biogas yield; and Quality. In the conditioning stage, the hygiene papers (HYP) (10 percent) were completely suspended with municipal solid waste. The dry materials balance of the conditioning unit resulted in an increase of 1.5 percent of the screenings, corresponding exactly to the amount of the added plastics. Heavy metal contents in the residues were well below limits established by German compost quality guidelines. Plate counts of the sums of Enterobacteriae and Salmonellae revealed that addition of soiled HYPs does not increase risk of contamination. Fermentation process and yield did not differ from control; biogas contained about 70-75 percent methane and most organic pollutants measured were undetectable. |
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