Table 4.

Summary of studies using wastes as growth media for bacteria.

Bacterial strain	Liquid media sources	Viable cell count (CFUmL−1)	Spore count (CFUmL−1)	References
Bacillus sp. and other bacteria	MSG by-product	7.45 $\times$ 109	6.45 $\times$ 106	(Namfon et al., 2017)
Bacillus siamensis	Anaerobic digestate of fruit and vegetable waste (with sucrose additive from sugar beet)	1.5 $\times$ 108	-	(Pastor-Bueis et al., 2017)
Lactobacillus	Glycerin pitch	-	-	(Nasarudin et al., 2020)
Bacillus subtilis	Corn steep liquor	3.9 $\times$ 109	-	(Z. He et al., 2020)
Azotobacter	Cane molasses	1 $\times$ 108	-	(Hindersah et al., 2020)
Bacillus		-	1 $\times$ 1010
Microbial consortia	5 isolates from activated dairy sludge, and 1 isolate from marine coastal waters at 1:1 ratio	7.36 $\times$ 107	-	(Halder et al., 2020)
Bacillus anthracis, B. fusiformis, and B. licheniformis	Mixed fishery wastewater from mackerel and brown seaweed	16.2 $\times$ 107	-	(Jung and Kim, 2020)