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Effects of C/N ratio on anaerobic co-digestion of cabbage, cauliflower, and restaurant food waste
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2020-05-02 , DOI: 10.1007/s13399-020-00733-x
I. Beniche , J. Hungría , H. El Bari , J. A. Siles , A. F. Chica , M. A. Martín

Every day, a large amount of food waste (FW) is generated that causes serious environmental problems such as the production of greenhouse gases and leachate. A possible treatment for this waste is anaerobic digestion (AD), but there are several problems associated with the accumulation of volatile fatty acids (VFA), foaming, or low buffer capacity. In order to resolve or mitigate this problem, FW was mixed with cabbage and cauliflower (CCF) leaves and stalks at different carbon/nitrogen ratios (C/N) to add value to this agricultural waste and benefit from the advantages of co-digestion. Under the study conditions, promising results were obtained during the co-digestion of FW and agricultural wastes at C/N = 45. These include a high biodegradability (98%), a methane yield of 475 mLSTP CH4/g VS, and an organic loading rate (OLR) of 0.06 kg of VS/m3 h for the CCF and FW mixture (CCF + FW). Anaerobic co-digestion of CCF + FW might be an interesting option for the simultaneous treatment of these types of organic waste, with the consequent social and environmental benefits.



中文翻译:

碳氮比对白菜,花椰菜和饭店食物垃圾厌氧消化的影响

每天都会产生大量的食物垃圾(FW),这些食物垃圾会导致严重的环境问题,例如产生温室气体和渗滤液。这种废物的一种可能的处理方法是厌氧消化(AD),但是挥发性脂肪酸(VFA)的积累,起泡或缓冲能力低等问题也有很多。为了解决或减轻此问题,将粮食作物与卷心菜和菜花(CCF)的叶和茎以不同的碳/氮比(C / N)混合在一起,以增加这种农业废料的价值并受益​​于共消化的优势。在研究条件下,以F / N = 45的比例混合FW和农业废物时,获得了可喜的结果。其中包括高生物降解性(98%),甲烷产率为475 mL STP CH 4/ g VS, CCF和FW混合物(CCF + FW)的有机负载率(OLR)为0.06 kg V​​S / m 3 h。CCF + FW厌氧共消化对于同时处理这些类型的有机废物可能是一个有趣的选择,因此具有社会和环境效益。

更新日期:2020-05-02
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