The introduction of the anaerobic d

The introduction of the anaerobic digestion for the treatment of the organic fraction of municipal solid waste (OFMSW) is currently
of special interest. The main difficulty in the treatment of this waste fraction is its biotransformation, due to the complexity of organic
material. Therefore, the first step must be its physical, chemical and biological pretreatment for breaking complex molecules into simple
monomers, to increase solubilization of organic material and improve the efficiency of the anaerobic treatment in the second step. This
paper describes chemical pretreatment based on lime addition (Ca(OH)2), in order to enhance chemical oxygen demand (COD) solubilization,
followed by anaerobic digestion of the OFMSW.
Laboratory-scale experiments were carried out in completely mixed reactors, 1 L capacity. Optimal conditions for COD solubilization
in the first step of pretreatment were 62.0 mEq Ca(OH)2/L for 6.0 h. Under these conditions, 11.5% of the COD was solubilized. The
anaerobic digestion efficiency of the OFMSW, with and without pretreatment, was evaluated. The highest methane yield under anaerobic
digestion of the pretreated waste was 0.15 m3 CH4/kg volatile solids (VS), 172.0% of the control. Under that condition the soluble COD
and VS removal were 93.0% and 94.0%, respectively. The results have shown that chemical pretreatment with lime, followed by anaerobic
digestion, provides the best results for stabilizing the OFMSW.
2007 Elsevier Ltd. All rights reserved.

ผลลัพธ์ (อังกฤษ) 2:

The Introduction of The anaerobic digestion for The Treatment of Municipal Solid Waste The Organic fraction of (OFMSW) is currently
of Special interest. The main Difficulty in The Treatment of Waste this fraction is ITS biotransformation, Due to The Complexity of Organic
Material. Therefore, The First Step ITS must be physical, Chemical and Biological pretreatment for breaking Into Simple Complex molecules
monomers, to increase Solubilization of Organic Material and Improve The efficiency of anaerobic The Treatment in The Second Step. This
Paper describes Chemical pretreatment based on Lime addition (Ca (OH) 2), in Order to ENHANCE Chemical Oxygen demand (COD) Solubilization,
followed by anaerobic digestion of The OFMSW.
Laboratory-Scale experiments were carried out in completely mixed reactors, 1. L capacity. Optimal conditions for COD Solubilization
in The First Step of pretreatment were 62.0 mEq Ca (OH) 2 / L for 6.0 h. Under these conditions, 11.5% of the COD was solubilized. The
anaerobic digestion efficiency of The OFMSW, with and Without pretreatment, was evaluated. The Highest yield methane under anaerobic
digestion of pretreated The Waste was twelve fifteen a.m. m3 CH4 / kg volatile solids (VS), The Control of 172.0%. Under that condition The soluble COD
and VS were 93.0% and 94.0% Removal, respectively. The results Have shown that pretreatment with Chemical Lime, followed by anaerobic
digestion, provides The best results for stabilizing The OFMSW.
the 2007th Elsevier Ltd. All rights reserved.