Bio-treatment of maize processing wastewater using indigenous microorganisms

Table 1 Quality assessment of maize processing wastewater samples

Analysis	Unit	Maize processing wastewater
Analysis	Unit	Sample 1	Sample 2	Sample 3
Physico-chemical characteristics
pH		7.3	7.4	7.2
EC	μS cm^− 1	1475	1520	1290
TSS	mg L^− 1	160,000	190,000	130,000
Phosphate	mg L⁻¹	3700	3900	3650
Sulfate	mg L^− 1	4300	4700	3900
Aluminum	mg L⁻¹	26	24	19
Barium	mg L⁻¹	19	12	7
Cobalt	mg L⁻¹	9	10	6
Chromium	mg L⁻¹	18	16	9
Copper	mg L⁻¹	217	280	240
Iron	mg L⁻¹	226	273	230
Manganese	mg L⁻¹	427	430	390
Nickel	mg L⁻¹	24	19	12
Lead	mg L⁻¹	3	1.2	2.1
Zinc	mg L⁻¹	228	240	236
Organic content
TKN	mg L⁻¹	2330	2190	2210
BOD	mg L⁻¹	8800	9000	9220
COD	mg L⁻¹	11,200	12,100	12,000
Microbiological assessment (Count × 10⁴)
TBC 22 °C	CFU mL⁻¹	220	135	190
TBC 35 °C	CFU mL⁻¹	300	240	290
Total coliforms count	CFU 100 mL⁻¹	1660	1420	1760
Fecal coliforms count	CFU 100 mL⁻¹	1250	1120	1190
Salmonella	Presence/Absence	absent	absent	absent
TFC	CFU mL⁻¹	1000	1200	700

ISSN: 2468-2039