Variation of the element composition of municipal sewage sludges in the context of new regulations on phosphorus recovery in Germany

Environmental Sciences Europe

Table 1 Wastewater treatment plants for measurement campaign

No.	Capacity [P.E.]	Treated waste-water^A [m³]	Sludge stabilization	P elimination	Sludge dewatering
a	> 1,000,000	84,100,000 ± 5%	None	EBPR, FeCl₃	Centrifuge
b	80,000	2,300,000 ± 2%	Anaerobic	FeCl₃, AlCl₃	Chamber filter press
c	200,000	7,100,000 ± 11%	Anaerobic	FeCl₃, AlCl₃	Chamber filter press
d	75,000	2,200,000 ± 11%	Anaerobic	EBPR, FeCl₃	Chamber filter press
e	40,000	2,400,000 ± 21%	Simultaneously aerobic	FeCl₃, Na aluminate	Centrifuge
f	14,700	1,300,000 ± 28%	Simultaneously aerobic	Na aluminate	Centrifuge
g	17,500	1,200,000 ± 23%	Simultaneously aerobic	EBPR, FeCl₃	Centrifuge
h	68,000	3,500,000 ± 23%	Anaerobic	EBPR, FeCl₃	Chamber filter press
i	98,000	12,800,000 ± 17%	Anaerobic	FeCl₃	Chamber filter press