An experimental apparatus was constructed to perform hybrid solid anaerobic digestion batch processing of the organic fraction of municipal solid waste. The preliminary process was carried out with a high total solids concentration of about 33% w w−1 and with an initial organic load of about 340 kg VS kg−1. The fresh organic fraction to inoculum ratio used to enhance the anaerobic process start-up was 0.910 kg VS kg VS−1. The process was conducted by spreading the percolate on top of the mixture. The percolate was stored in a separate section of the apparatus with a mean hydraulic retention time of about 1 day. During the process, acetate, butyrate and propionate in the percolate reached concentrations ranging from 3000 to 11 000 mg L−1. In spite of these high concentrations, the biomethane produced from both the solid and the percolate was quite high, at about 210 NL kg VS−1. The digestate obtained at the end of the run showed rather good features for being classified as an organic fertilizer according to Italian law. However, a residual phytotoxicity level was detected by a standardized test showing a germination index of about 50%.
BeurskensLWMHekkenbergMVethmanP (2012) ECN – Renewable Energy Projection as Published in the National Renewable Energy Action Plans of the European Members States. Available at: http://www.ecn.nl/docs/library/report/2010/e10069.pdf (accessed 23 March 2012).
2.
BolonzellaDPavanPMaceS. (2006) Dry anaerobic digestion of differently sorted organic municipal solid waste: a full-scale experience. Water Science & Technology53(8): 23–32.
3.
BouallaguiHTouhamiYBen CheikhR. (2005) Bioreactor performance in anaerobic digestion of fruit and vegetable wastes. Process Biochemistry40: 898–995.
4.
ChoJKParkSC (1995) Biochemical methane potential and solid-state anaerobic digestion of Korean food waste. Bioresource Technology52: 245–253.
5.
De BaereLMattheeuwsB (2010) Anaerobic digestion in Europe: State of the art. In: 7th International Conference on Organic Resource in the Carbon Economy ORBIT 2010, 29 June–3 July, Heraklion, Crete. Thessaloniki, Greece: Grafima Publisher.
6.
Decreto Legislativo 29 aprile 2010, n°75 (2010) Riordino e revision della disciplina in materia di fertilizzanti, a norma dell’art. 13 della legge 7 luglio 2009, n°88. Gazzetta Ufficiale121 (106), 25May2010, Rome, Italy.
7.
de LaclosHFDeboisSSaint-JolyC (1997) Anaerobic digestion of municipal solid organic waste: Valorga full-scale plant in Tilburg, the Netherlands. Water Science and Technology36(6–7): 457–462.
8.
Di MariaFValentiniF (2011) Effect of MSW aerobic pre-treatment on biogas potential for bioreactor landfill: experimental analysis. In Proceedings of the 13th International Waste Management and Landfill Symposium Sardinia 2011, 3–7 October, S. Margherita di Pula, Cagliari, Italy. Padova, Italy: CISA Publisher.
9.
Di MariaFSordiAMicaleC (2012a) Optimization of solid state anaerobic digestion by inoculum recirculation: the case of an existing mechanical biological treatment plant. Applied Energy97: 462–469
10.
Di MariaFSordiAMicaleC (2012b) Energy production from mechanical biological treatment and composting plants exploiting solid anaerobic digestion batch: an Italian case study. Energy Conversion and Management56: 112–120.
11.
Directive 2001/77/CE of the European Parliament and of the Council of 27 September 2001 on the promotion of the electricity produced from renewable energy sources in the internal electricity market. Official Journal of the European Communities 27.10.2001.
12.
Forster-CarnieroTFdez-GuelfoLAPerezM. (2004) Optimization of SEBAC start-up phase of municipal solid waste anaerobic digestion. Chemical and Biochemical Engineering Quarterly18(4): 429–439.
13.
Forster-CarnieroTPerezMRomeroLI (2008) Influence of total solid and inoculums contents on performance of anaerobic reactors treating food waste. Bioresource Technology99: 6994–7002.
14.
FrickeKSantenHWallmannR (2005) Comparison of selected aerobic and anaerobic procedures for MSW treatment. Waste Management25: 799–810.
15.
GigliottiGProiettiPSaid PullicinoD. (2012) Co-Composting of olive husks with high moisture contents: Organic matter dynamics and compost quality. International Biodeterioration & Biodegradation67: 8–14.
16.
GuendouzJBuffierePCachoJ. (2010) Dry anaerobic digestion in batch mode. Design and operation of a laboratory-scale, completely mixed reactor. Waste Management30: 1768–1771.
17.
IllmerPGstraunthalerG (2009) Effect of seasonal changes in quantities of biowaste on full scale anaerobic digester performances. Waste Management29: 162–167.
18.
KimDHOhSE (2011) Continuous high-solids anaerobic co-digestion of organic solid waste under mesophilic conditions. Waste Management31: 1943–1948.
19.
LiYParkSYZhuJ (2011) Solid-state anaerobic digestion for methane production from organic waste. Renewable and Sustainable Energy Reviews15: 821–826.
20.
MonteroBGarcia-MoralesJLSalesD. (2010). Evolution of butyric acid and the methanogenic microbial population in a thermophilic dry anaerobic reactor. Waste Management30: 1790–1797.
21.
NelsonDWSommersLE (1996) Total carbon, organic carbon and organic matter. In: SparksDLPageALHelmkePA. Methods in Soil Analysis, Part 3: Chemical methods. Madison, WI, USA: Soil Science Society of America/American Society of Agronomy, pp 961–1010.
22.
ParedesCBernalMPRoigA. (2001) Effects of olive mill wastewater addition in composting of agroindustrial and urban waste. Biodegradation12: 225–234.
23.
PullicinoDSErriquensFGGigliottiG (2007) Changes in the chemical characteristics of water extractable organic matter during composting and their influence on compost stability and maturity. Bioresource Technology98: 1822–1831.
24.
RintalaJAJarvinenKT (1996) Full-scale mesophilic anaerobic co-digestion of municipal solid waste and sewage sludge: methane production characteristics. Waste Management & Resources14: 163–170.
25.
SchievanoAD’ImporzatoGMalaguttiL. (2010) Evaluating inhibition conditions in high-solids anaerobic digestion of organic fraction of municipal solid waste. Bioresource Technology101: 5728–5732.
26.
Ten BrummelerE (2000) Full scale experience with BIOCEL process. Water Science and Technology41: 299–304.
27.
Ten BrummelerE (1993) Dry anaerobic digestion of the organic fraction of municipal solid waste. PhD thesis, Wageningen University, The Netherlands.
28.
TiquiaSM (2010) Reduction of compost phytotoxicity during the process of decomposition. Chemosphere79: 506–512.
29.
TiquiaSMTamNFY (1998) Elimination of phytotoxicity during co-composting of spent pig-manure sawdust litter and pig sludge. Bioresource Technology65: 43–49.
VinotMPerezCATurmP. (2010) Improvements in anaerobic digestion units and in pre-treatments performances beforehand. In: Proceedings of the Third International Symposium on Energy From Biomass and Waste; 2010. 8–11 November, Venice, Italy. Padova, Italy: CISA Publisher.
32.
ZucconiFForteMMonacoA. (1981) Biological evaluation of compost maturity. BioCycle22: 27–29.
33.
ZucconiFMonacoAForteM. (1985) Phytotoxins during the stabilization of organic matter. In: GasserJKR (ed.) Composting of Agricultural and Other Wastes. London, UK: Elsevier Applied Science Publisher, pp. 73–85.
