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Table 3 Culture medium cost to produce 1 kg of biomass

From: Effects of C/N ratio on the growth and protein accumulation of heterotrophic Chlorella in broken rice hydrolysate

Chemicals

Unit pricea (USD/kg)

Amountb (g)

BRH group

Glucose group

NaNO3

0.57

243

243

K2HPO4

1.48

6.48

6.48

MgSO4·7H2O

0.07

12.15

12.15

CaCl2·2H20

0.35

5.83

5.83

Citric acid

2.19

0.97

0.97

Ferric ammonium citrate

7.98

0.97

0.97

EDTA·2Na

4.36

0.16

0.16

Na2CO3

0.38

3.24

3.24

A5

1.48

73.55

97.36

α-Amylase

1.19

60.00

0

Glucoamylase

0.69

160.00

0

Glucose

0.30

0

3200

Broken rice

0.57

2370

0

Total costc (USD)

 

1.14

2.36

  1. aThe unit price is determined according to the minimum price in Wangsheng raw material trading platform in China (https://www.rawmex.cn/) in August 2022 (1.00 USD = 6.77 CNY)
  2. bThe amount of chemicals required to produce 1 kg of biomass
  3. cTotal cost is calculated based on the amount and unit price of various chemicals required to produce 1 kg of biomass