Removal of Total Coliforms, Thermotolerant Coliforms, and Helminth Eggs in Swine Production Wastewater Treated in Anaerobic and Aerobic Reactors

Table 4

Average of the most probable number (MPN g⁻¹ TS) of total and thermotolerant coliforms in the sludge of the UASB reactors placed in series, at pilot scale of treatment system I, in assays 1, 2, 3, and 4.

Sampling site	Distance from entrance (mm)	Assay 1	Assay 2	Assay 3	Assay 4
		Total coliforms (MPN g^−1 TS)
UASB (R1)	400	1.50𝐸+08	6.50𝐸+08	4.85𝐸+08	9.10𝐸+08
	800	1.90𝐸+07	1.65𝐸+07	2.70𝐸+08	9.02𝐸+07
	1200	7.20𝐸+06	8.60𝐸+06	2.45𝐸+06	7.20𝐸+07
	1600	5.20𝐸+06	4.50𝐸+06	2.20𝐸+06	8.75𝐸+06
UASB (R2)	400	1.20𝐸+06	8.75𝐸+06	4.75𝐸+05	9.35𝐸+06
	800	9.30𝐸+05	1.06𝐸+06	4.00𝐸+05	5.30𝐸+05
	1200	9.10𝐸+05	4.95𝐸+05	2.90𝐸+05	4.10𝐸+05
	1600	6.00𝐸+05	2.60𝐸+05	3.60𝐸+05	3.60𝐸+05
		Thermotolerant coliforms (MPN g^−1 TS)
UASB (R1)	400	1.20𝐸+08	6.10𝐸+08	4.05𝐸+08	1.10𝐸+08
	800	1.90𝐸+07	1.50𝐸+07	2.30𝐸+08	8.20𝐸+07
	1200	0.72𝐸+07	8.60𝐸+06	2.25𝐸+06	6.30𝐸+07
	1600	0.72𝐸+07	4.50𝐸+06	2.00𝐸+06	7.80𝐸+06
UASB (R2)	400	1.00𝐸+06	2.00𝐸+06	4.15𝐸+05	6.50𝐸+06
	800	9.30𝐸+05	1.01𝐸+06	3.15𝐸+05	4.30𝐸+05
	1200	7.00𝐸+05	4.00𝐸+05	2.45𝐸+05	4.10𝐸+05
	1600	5.30𝐸+05	2.40𝐸+05	2.30𝐸+05	2.70𝐸+05