Amount of energy recoverable from an existing sludge digester with the co-digestion with fruit and vegetable waste at reduced retention time

被引：70
作者：
Di Maria, Francesco [1 ]
Sordi, Alessio [1 ]
Cirulli, Giuseppe [1 ]
Micale, Caterina [1 ]
机构：
[1] Univ Perugia, Dipartimento Ingn, LAR, I-06125 Perugia, Italy
来源：
APPLIED ENERGY | 2015年 / 150卷
关键词：
Anaerobic co-digestion; Biomethane; Energy recovery; Fruit and vegetable waste; Organic loading rate; Waste-mixed sludge; MECHANICAL BIOLOGICAL TREATMENT; STATE ANAEROBIC-DIGESTION; MUNICIPAL SOLID-WASTE; ACTIVATED-SLUDGE; ORGANIC FRACTION; SEWAGE-SLUDGE; PLANTS; SCALE; PERFORMANCE; CODIGESTION;
D O I：
10.1016/j.apenergy.2015.01.146
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The working operations of a full-scale digester of a wastewater treatment plant for waste-mixed sludge (WMS) stabilization was reproduced using a pilot-scale apparatus. The effect of WMS co-digested with fruit and vegetable waste (FVW) was investigated at different organic loading rates (OLR), from 1.46 kg VS/m(3) day to 2.8 kg VS/m(3) day, and reduced hydraulic retention time, from 14 days to about 10 days. Methane production per unit of digester volume increased from about 140 NL/m(3) day to a maximum value of about 900 NL/m(3) day when OLR was increased from 1.46 kg VS/m(3) day to 2.1 kg VS/m(3) day. Higher OLR caused an excessive HRT reduction, decreasing the percentage of volatile solids degradation without significantly affecting process stability. The maximum electrical energy producible from the full-scale anaerobic facility was about 3,500,000 kW h/year. In these conditions the electrical power output and the net efficiency of the co-generator were 470 kW and 37%, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：9 / 14
页数：6
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