Nanoscale Zero-Valent Iron for Sulfide Removal from Digested Piggery Wastewater

Table 1

Wastewater quality monitored during the period of the pilot test.

	Day 0		Day 1		Day 7		Day 14		Day 30
	Cont.	Exp.	Cont.	Exp.	Cont.	Exp.	Cont.	Exp.	Cont.	Exp.
𝑇 (°C)	29.69	29.61	33.9	35.2	31.27	32.88	28.5	29.47	32.8	31.2
DO (mg/L)	1.0	1.04	0.73	0.63	0.76	0.56	0.45	0.48	0.23	0.41
pH	7.19	7.04	7.15	7.32	7.2	7.35	7.05	7.17	7.2	7.35
ORP (mV)	−384	−372	−388	−376	−312	−322	−325	−270	−398	−350
Fe(II)	4.3	4.1	5.0	19.3	3.25	2.0	4.1	3.25	3.0	3.0

Cont. means the control test; Exp. means the experimental test.