Anaerobic co-digestion of municipal sewage sludge and fruit/vegetable waste: effect of different mixtures on digester stability and methane yield

被引:19
|
作者
Arhoun, Brahim [1 ]
Villen-Guzman, Maria D. [1 ]
Vereda-Alonso, Carlos [1 ]
Miguel Rodriguez-Maroto, Jose [1 ]
Garcia-Herruzo, Francisco [1 ]
Gomez-Lahoz, Cesar [1 ]
机构
[1] Univ Malaga, Fac Sci, Chem Engn Dept, E-29071 Malaga, Spain
关键词
Co-digestion; municipal sewage sludge; fruit and vegetable waste; organic loading rate; biogas; VEGETABLE WASTE; BIOGAS PRODUCTION; ACTIVATED-SLUDGE; SOLID-WASTES; PILOT-SCALE; FRUIT; PERFORMANCE; MANURE; WATER; IMPROVEMENT;
D O I
10.1080/10934529.2019.1579523
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The anaerobic co-digestion of fruit and vegetable waste (FVW) and municipal sewage sludge (MSS) is investigated under mesophilic conditions. This was done at a constant hydraulic retention time (HRT) similar to that typically used at waste water treatment plant digesters, 20days. The effects on digester performance of the FVW:MSS ratio and the organic loading rate (OLR) were examined. Initially the digester was fed with MSS from wastewater treatment plants (WWTP) with an average OLR of 1.03kg(VS)(m(3)d)(-1). The co-digestion of MSS and FVW was performed at various ratios of FVW in the mixture, while increasing the OLRs, from 1.03 to 4.78kg(VS)(m(3)d)(-1). The experimental specific methane production (SMP) was 0.303m(3)(kg(VS))(-1) for MSS and 0.403m(3)(kg(VS))(-1) for FVW as single substrate. This value varied for co-digestion with a maximum of 0.445m(3)(kg(VS))(-1) for a FVW:MSS ratio of 40:60. Alkalinity and pH values remain relatively constant regardless the different FVW:MSS ratios fed. As this ratio increases, the removal of the volatile solids (VS) increased from 38.7% to 82%. The average methane content of digester biogas was about 62-64%.
引用
收藏
页码:628 / 634
页数:7
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