Environmental Sciences Europe

Table 4 Nutrient and organic change in the sludge and sludge + oat reactor

From: Industrial sludge containing pharmaceutical residues and explosives alters inherent toxic properties when co-digested with oat and post-treated in reed beds

(mg/L)	N_tot	TOC	P_tot	NH₄	C/N
Ingoing sludge D5	103	369	4.2	46.7	3.6
Digested D5	110	215	1.5	89.0	2.0
Sludge residue D5	28	275	1.4	0.4	9.9
Bed material D5	49	8	1.3	17.2	0.2
Outgoing water D5	Nm	118	1.5	2.7	0.2
Red (%)		68	65.0	94.2	-0.2
Ingoing sludge D6	811	1,340	10.7	800	1.7
Digested D6	777	1,290	13.4	746	1.7
Sludge residue D6	439	350	3,4	0,31	0,8
Bed material D6	123	373	32.3	24.3	3
Outgoing water D6	347	151	10.1	164	0.4
Red (%)	57	89	5.6	79.5	1.6

Before and after digestion and dewatering through reed beds after 3 months. Reduction (%) of nutrients and organics is calculated between ingoing sludge and outgoing water from reed beds. Italic number means increase. nm, not measured.

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