Table 5.

Total phosphorus load and retention by the bioreactors

Bioreactors	Hydrological year	Yearly TP load inlet	TP retention efficiency	Yearly TP retention rate	Daily TP load inlet	Daily TP retention rate
		g P m−3 yr−1	%	g P m−3 yr−1	mg P m−3 d−1	mg P m−3 d−1
Gyldenholm A	2018–20191)
	2019–2020	6.7	− 13	− 0.87	48.6	− 6.3
Gyldenholm B	2018–20191)
	2019–2020	11	− 0.4	− 0.04	90.9	− 0.4
Gyldenholm C	2018–20191)
	2019–2020	13.7	52	7.12	71.7	37.3
Hofmansgave A	2018–20192)	1.50	− 4097.9	− 61.47	21.7	− 890.8
	2019–20202)	3.20	− 1730.9	− 55.39	50.8	− 879.2
Hofmansgave B	2018–20192)	0.96	− 3549.8	− 34.08	20.9	− 740.8
	2019–20202)	1.80	− 2233.3	− 40.20	37.5	− 837.5
Hofmansgave C	2018–20192)	0.77	− 4992.6	− 38.44	15.7	− 784.6
	2019–20202)	1.30	− 2626.0	− 34.14	23.2	− 609.6
Egsmarken	2018–2019	2.80	− 1374.8	− 38.49	21.7	− 298.4
	2019–2020	8.80	27.9	2.46	43.6	12.2
Dundelum	2018–2019	11.80	− 844.4	− 99.64	91.5	− 772.4
	2019–2020	41.70	34.8	14.51	221.8	77.2
Serupgård	2018–2019	13.20	− 240.2	− 31.71	123.4	− 296.3
	2019–2020	21.80	43.4	9.46	100.5	43.6
Mean	All years	9.40	− 1436.4	− 26.73	65.6	− 396.4

¹⁾Sampling of TP failed

²⁾The Hofmansgave facility was only in operation from February to April in both monitoring periods due to technical problems. In the beginning of the second year, all woodchips were removed and stored, and a new membrane was installed. Hereafter, woodchips were filled into the bioreactor again