Importance of storage time in mesophilic anaerobic digestion of food waste

Storage was used as a pretreatment to enhance the methanization performance of mesophilic anaerobic digestion of food waste. Food wastes were separately stored for 0, 1,2, 3, 4, 5, 7, and 12 days, and then fed into a methanogenic reactor for a biochemical methane potential（BMP） test lasting up to 60...

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Bibliographic Details
Published inJournal of environmental sciences (China) Vol. 45; no. 7; pp. 76 - 83
Main Authors Lü, Fan, Xu, Xian, Shao, Liming, He, Pinjing
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.07.2016
Subjects
Anaerobiosis
Bio-pretreatment
Biochemical methane potential
Fermentation
Food
Food waste
Hydrolysates
Methane - analysis
Refuse Disposal - methods
Storage
Waste Products - analysis
中温厌氧消化
储存时间
厌氧消化处理
存储时间
挥发性固体
食品废弃物
食物垃圾
餐厨垃圾
Food waste
Biochemical methane potential
Storage
Fermentation
Bio-pretreatment
Hydrolysates
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Summary:Storage was used as a pretreatment to enhance the methanization performance of mesophilic anaerobic digestion of food waste. Food wastes were separately stored for 0, 1,2, 3, 4, 5, 7, and 12 days, and then fed into a methanogenic reactor for a biochemical methane potential（BMP） test lasting up to 60 days. Relative to the methane production of food waste stored for 0–1 day（285–308 m L/g-added volatile solids（VSadded））, that after2–4 days and after 5–12 days of storage increased to 418–530 and 618–696 m L/g-VSadded,respectively. The efficiency of hydrolysis and acidification of pre-stored food waste in the methanization reactors increased with storage time. The characteristics of stored waste suggest that methane production was not correlated with the total hydrolysis efficiency of organics in pre-stored food waste but was positively correlated with the storage time and acidification level of the waste. From the results, we recommend 5–7 days of storage of food waste in anaerobic digestion treatment plants.
Bibliography:Storage was used as a pretreatment to enhance the methanization performance of mesophilic anaerobic digestion of food waste. Food wastes were separately stored for 0, 1,2, 3, 4, 5, 7, and 12 days, and then fed into a methanogenic reactor for a biochemical methane potential（BMP） test lasting up to 60 days. Relative to the methane production of food waste stored for 0–1 day（285–308 m L/g-added volatile solids（VSadded））, that after2–4 days and after 5–12 days of storage increased to 418–530 and 618–696 m L/g-VSadded,respectively. The efficiency of hydrolysis and acidification of pre-stored food waste in the methanization reactors increased with storage time. The characteristics of stored waste suggest that methane production was not correlated with the total hydrolysis efficiency of organics in pre-stored food waste but was positively correlated with the storage time and acidification level of the waste. From the results, we recommend 5–7 days of storage of food waste in anaerobic digestion treatment plants.
Food waste Bio-pretreatment Storage Fermentation Biochemical methane potential Hydrolysates
11-2629/X
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1001-0742
1878-7320
DOI:10.1016/j.jes.2015.11.019