Abstract：
:Spent coffee grounds (SCG) are usually disposed as common garbage, without specific reuse strategies implemented so far. Due to its recognised richness in bioactive compounds, the effect of SCG on lettuce's macro- and micro-elements was assessed to define its effectiveness for agro industrial reuse. A greenhouse pot experiment was conducted with different amounts of fresh and composted spent coffee, and potassium, magnesium, phosphorous, calcium, sodium, iron, manganese, zinc and copper were analysed. A progressive decrease on all lettuce mineral elements was verified with the increase of fresh spent coffee, except for potassium. In opposition, an increment of lettuce's essential macro-elements was verified when low amounts of composted spent coffee were applied (5%, v/v), increasing potassium content by 40%, manganese by 30%, magnesium by 20%, and sodium by 10%, of nutritional relevance This practical approach offers an alternative reuse for this by-product, extendable to other crops, providing value-added vegetable products.
journal_name
Food Chemjournal_title
Food chemistryauthors
Cruz R,Morais S,Mendes E,Pereira JA,Baptista P,Casal Sdoi
10.1016/j.foodchem.2013.10.059subject
Has Abstractpub_date
2014-04-01 00:00:00pages
294-9eissn
0308-8146issn
1873-7072pii
S0308-8146(13)01495-7journal_volume
148pub_type
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