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Table 1 The composition of SL after dilution with tap water to 25 % v/v

From: Biomass production and removal of ammonium and phosphate by Chlorella sp. in sludge liquor at natural light and different levels of temperature control

Compound (mg L−1)

TN

304 ± 6.1

NH4-N

253 ± 20

NO3-Na

6.0

NO2-Na

0.6

TP

33.3 ± 1.52

PO4-P

23.0 ± 1.23

K

26.0 ± 1.0

Ca

22.5 ± 0.5

S

16.8 ± 1.04

Mg

3.7 ± 0.08

Fe

3.1 ± 0.17

Mn

0.3 ± 0.02

Cu

0.3 ± 0.25

Zn

0.7 ± 0.68

Al

75.0 ± 2.00

TSS

748 ± 198

pH

7.9 ± 0.2

COD

1360 ± 60

  1. TN total nitrogen, TP total phosphorus
  2. aMeasured after sampling at the WWTP while the other parameters were measured prior to use