High-performance internal circulation anaerobic granular sludge reactor for cattle slaughterhouse wastewater treatment and simultaneous biogas production

Table 2 Characterization of the CSWW during the different study phases

Parameter	Phase I			Phase II			Phase III
Parameter	Min	Max	Average	Min	Max	Average	Min	Max	Average
pH	6.12	8.4	7.4 ± 0.32	7.0	9.3	7.4 ± 0.43	6.9	7.8	7.3 ± 39
COD (mg/L)	1385	6240	3426 ± 480	1111	7711	3075 ± 578	2460	8325	4293 ± 760
BOD (mg/L)	780	2687	1442 ± 236	421	2783	1425 ± 477	1107	4113	2025 ± 580
TSS (mg/L)	146	940	478 ± 178	114	580	306 ± 171	241	3310	838 ± 360
Ammonia (mg/L)	60	297	189 ± 56	78.4	462	243 ± 61	192	535	286 ± 78
TKN (mg/L)	187	568	323 ± 68	193.2	523	323 ± 72	234.6	710	370 ± 84
PO₄ (mg/L)	8.3	83.1	43 ± 32	6.5	147	69 ± 45	22.4	139	52 ± 23
Oil & grease (mg/L)	21	123.2	58 ± 23	21.2	76.3	49.6 ± 22	38.5	188	77 ± 31

ISSN: 1472-6750