AMB Express

Table 1 Operative details of the BSR bioreactors regarding pH and sulfate. Microbial samples were analysed on the days listed in the table for each bioreactor. HRT = hydraulic retention time in the carrier material

From: Sulfate-reducing bioreactors subjected to high sulfate loading rate or acidity: variations in microbial consortia

		Influent				Effluent
Bioreactor	Day	pH	SO₄ (mg/L)	SO₄ load (mg/L*d)	HRT (h)	pH	Redox (mV)	SO₄ (mg/L)	SO₄ reduction (mg/L*d)	Acetate (mg/L)
BR 1 A	49	5.9	1600	1600	23.6	7.2	− 357	290	1300	5
	57	5.2	1600	1800	21.2	6.2	− 290	830	700	16,000
	92	5.4	1600	2300	17.0	7.0	− 129	900	800	< 2
	135	5.8	1600	4700	8.2	7.2	− 299	140	3500	54
	251	5.6	1600	8000	4.8	7.3	− 345	410	6000	350
	315	5.5	1600	13,700	2.8	7.0	− 346	460	9900	490
	319	5.7	1600	16,500	2.3	6.9	− 333	120	14,200	n.a
	322	5.8	1600	19,300	2.0	6.9	− 336	520	13,200	565
	333	5.6	1600	23,500	1.6	6.9	− 333	600	15,000	850
BR 1 B	49	5.9	1600	1600	23.6	7.0	− 370	310	1300	9
	57	5.2	1600	1800	21.2	6.2	− 251	920	590	15,000
	92	5.4	1600	2300	17.0	7.0	− 301	330	1400	437
	135	5.8	1600	4700	8.2	6.8	− 304	510	2600	450
	251	5.6	1600	8000	4.8	7.5	− 332	440	5800	560
	315	5.5	1600	13,700	2.8	6.7	− 328	460	9900	690
	322	5.7	1600	19,300	2.0	6.7	− 329	480	13,700	660
	329	5.8	1600	22,800	1.7	6.9	− 336	630	14,100	1100
	333	5.6	1600	23,500	1.6	6.7	− 335	560	15,500	960
BR 2	52	6.3	1700	1600	24.6	7.1	− 380	570	1000	83
	70	6.1	1700	2100	18.7	7.4	− 353	250	1800	140
	95	6.1	1700	2500	16.0	7.4	− 416	430	1800	280
	110	1.8	2900	1800	37.6	6.8	− 353	320	1600	n.a
	115	1.8	2900	2600	25.2	6.5	− 364	540	2100	1300
	124	1.3	3900	2400	37.6	5.8	− 276	1400	1500	2300
	138	5.9	1900	1700	25.2	7.3	− 346	690	1200	380
	166	5.8	1900	2100	20.5	7.6	− 390	380	1700	44
	174	1.7	2700	1600	37.6	7.2	− 354	120	1600	480
	194	1.6	2700	2500	25.2	6.8	− 290	470	2000	670
	199	1.3	3400	2100	37.6	6.1	− 269	1200	1300	1600
	208	1.3	3400	2100	37.6	5.3	− 176	2000	800	2400

n.a.: not analyzed

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