Enhancement of Biodiesel Production from Marine Alga, Scenedesmus sp. through In Situ Transesterification Process Associated with Acidic Catalyst

Table 2

Analysis of the in situ transesterification factors for the yield of crude biodiesel from Scenedesmus sp. using the orthogonal array design (% w/w, based on the lipid weight).

	𝐴	𝐵	𝐶	𝐷
𝐾1	76.25±2.3	98.78±2.7	115.21±6.2	90.65±5.4
𝐾2	123.75±5.9	124.51±5.3	109.31±3.4	129.94±4.8
𝐾3	146.01±5.3	122.72±5.5	121.49±3.8	125.42±3.2
𝑘1	25.42±0.77	32.93±0.88	38.4±2.07	30.22±1.82
𝑘2	41.25±1.96	41.5±1.76	36.44±1.14	43.31±1.60
𝑘3	48.67±1.75	40.91±1.84	40.5±1.27	41.81±1.08
𝑅	23.25	8.58	4.06	13.09
Optimal level	3	2	3	2

𝐾^𝐴_𝑖= ∑ biodiesel yield at 𝐴_𝑖.  
𝑘^𝐴_𝑖=𝐾^𝐴_𝑖/3.  
𝑅^𝐴_𝑖=max{𝑘^𝐴_𝑖}−min{𝑘^𝐴_𝑖}.