Production of Biodiesel from Chlorella sp. Enriched with Oyster Shell Extracts

Table 2

Comparison of the initial dissolved CO₂ concentrations in several culture media according to the initial pH.

Parameter	Culture medium
	A	B	C	D
pH value	6.8	6.7	6.5	6
Dissolved; CO2 (ppm)	22	24	32	108

A: 1% oyster shells pretreated with a high-pressure homogenization process and acetic acid; B: 5% oyster shells pretreated with a high-pressure homogenization process and acetic acid; C: 10% oyster shells pretreated with a high-pressure homogenization process and acetic acid; D: 5% oyster shells pretreated with a high-pressure homogenization process and hydrochloric acid.