Biofouling of production wells by manganese and iron bacteria

The Fe content of the scale, and hence the rate of biofouling, is related to the Fe content of the water:

 

	Scale chemistry, %			Water chemistry, mg/L
	Well #1	Well #2	Well #3	Well #1	Well #2	Well #3
Element
Mn	30.4	7.26	15.4	0.0391	0.0796	0.108
Fe	4.88	32.2	19.0	0.025	0.102	0.0528
Ca	6.83	4.42	5.19	89.4	88.9	91.1
Si	1.01	2.35	1.83	7.2	7.1	7.2
Mg	0.37	0.14	0.18	25.5	25.3	23.9
pH				7.2	7.1	7.1
sulfate				40	52.5	52
alkalinity (as CaCO3)				291	290	290