Improvement of anaerobic digestion of waste-activated sludge by using H2O2 oxidation, electrolysis, electro-oxidation and thermo-alkaline pretreatments

被引：64

作者：

Feki, Emna ^{[1
]}

Khoufi, Sonia ^{[1
]}

Loukil, Slim ^{[1
]}

Sayadi, Sami ^{[1
]}

机构：

[1] Ctr Biotechnol Sfax, Environm Bioproc Lab, Sfax 3018, Tunisia

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2015年 / 22卷 / 19期

关键词：

Waste-activated sludge; COD solubilization; Thermo-alkaline; Electro-oxidation; Anaerobic digestion; THERMOCHEMICAL PRETREATMENT; FENTON PROCESS; EXCESS SLUDGE; WATER; DISINTEGRATION; HYDROLYSIS; SOLUBILIZATION; COMBINATION; GENERATION;

D O I：

10.1007/s11356-015-4677-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Disintegration of municipal waste-activated sludge (WAS) is regarded as a prerequisite of the anaerobic digestion process to reduce sludge volume and improve biogas yield. Pretreatment of WAS using thermo-alkaline (TA), H2O2 oxidation, electrolysis and electro-oxidation (EO) processes were investigated and compared in term of COD solubilization and biogas production. For each pretreatment, the influences of different operational variables were studied in detail. At optimum conditions, EO gave the maximum COD solubilization (28 %). The effects of pretreatments under the optimum conditions on anaerobic digestion were experienced with biochemical methane potential assay. Significant increases in biogas yield up to 78 and 40 % were observed respectively in the EO and TA pretreated samples compared to raw sludge. Results clearly revealed that the application of EO is a significant alternative method for the improvement of WAS anaerobic digestion.

引用

页码：14717 / 14726

页数：10

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