User:SCGProject/Notebook/EBC 571/2021/09/14

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Abstract Brainstorming

Key points for the abstract

  1. First sentence: What is the problem? Coffee can have contaminant?
    1. Spent coffee grounds (SCGs) are one of the principal biowastes in the production of instant coffee and coffee brewing.
  2. This is how we are doing?
    1. We use coffee samples from different continents with the same roasting and blending profiles (light roasting and Arabica blend) to search relationship and differences in terms of composition.
    2. There are 5 samples in total with 5 trials each
    3. Extraction of spend grounds was performed in a home coffee make machine at 83 °C and then oven-dried to constant mass at 333.15 K
  3. These are the results we want to get...

Main idea

Extract SCG main groups (carbohydrates, proteins, lipids and phenolic compounds)...

  1. phenolic compounds:
  2. carbohydrates:
  3. proteins: Kjeldahl method (method 984.13)??? , See
  4. lipids: Soxhlet extraction (method 920.39)??? , hexane and scCO2 extraction???

Analyze SCG and Brewing extraction using instrumental techniques

  1. ICP-OES
  2. LC MS
  3. Scanning Electron Microscopy
  4. (If Possible) proton Nuclear Magnetic Resonance (1H NMR) spectroscopy
  5. (If Possible) Near-Infrared (NIR) spectroscopy

Analyze Brewing extraction using techniques:

  1. ICP-OES
  2. LC MS


  1. SCG consists of 74.2 wt% carbohydrate (that predominantly is lignocellulose), 13.3 wt% protein, 10.3 wt% oil, and 2.2 wt% ash