Performance and stability of sewage sludge digestion under CO2 enrichment: A pilot study

被引：30

作者：

Alibardi, Luca ^{[1
]}

Green, Kevin ^{[1
]}

Favaro, Lorenzo ^{[2
]}

Vale, Peter ^{[3
]}

Soares, Ana ^{[1
]}

Cartmell, Elise ^{[1
,4
]}

Fernandez, Yadira Bajon ^{[1
]}

机构：

[1] Cranfield Univ, Sch Water Environm & Energy, Cranfield Water Sci Inst, Cranfield MK43 0AL, Beds, England

[2] Univ Padua, Dept Agron Food Nat Resources Anim & Environm, Viale Univ 16, I-35020 Padua, Italy

[3] Severn Trent Water, 2 St Johns St, Coventry CV1 2LZ, W Midlands, England

[4] Scottish Water, Castle House,6 Castle Dr,Carnegie Campus, Dunfermline KY11 8GG, Fife, Scotland

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 245卷

关键词：

Anaerobic digestion; Carbon dioxide utilisation; Sewage sludge; Pilot scale; Process stability; 2-PHASE ANAEROBIC-DIGESTION; WASTE-WATER TREATMENT; CARBON-DIOXIDE; METHANE PRODUCTION; FOOD WASTE; BMP TESTS; BIOGAS; REACTOR; CAPTURE; BIOMASS;

D O I：

10.1016/j.biortech.2017.08.071

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Carbon dioxide (CO2) injection in anaerobic digestion has recently been proposed as an interesting possibility to boost methane (CH4) recovery from sludge and organic waste by converting a greenhouse gas into a renewable resource. This research assessed the effects of exogenous CO2 injection on performance and process stability of single-phase continuous anaerobic digesters. Two pilot scale reactors treating sewage sludge were operated for 130 days. One reactor was periodically injected with CO2 while the other acted as control. Two injection frequencies and injection devices were tested. The results indicated that CO2 enrichment allowed an increase in CH4 production of ca. 12%, with a CH4 production rate of 371 +/- 100 L/(kgVS(fed).d) and a CH4 concentration of ca. 60% when dissolved CO2 levels inside the test reactor were increased up to 1.9-fold. Results also indicated an improvement in process resilience to temporary overloads and no impacts on stability parameters.

引用

页码：581 / 589

页数：9

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