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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: Water Res. 2017 May 26;122:42–52. doi: 10.1016/j.watres.2017.05.055

Fig. 3.

Fig. 3

Representative van Krevelen diagrams showing all formula classes for (a) primary effluent, (b) UCT secondary clarifier effluent, (c) final effluent, and (d) Ostara effluent samples determined using positive mode FT-ICR MS. The rectangles indicate regions associated with (1) lipids, (2) proteins, (3) aminosugars, (4) carbohydrates, (5) condensed hydrocarbons, (6) lignin, and (7) tannin.