Keyword Analysis & Research: why is return activated sludge necessary

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is return activated sludge necessary	1.14	1	5661	44	40
why	0.55	0.3	9285	60	3
is	1.87	0.6	5214	71	2
return	1.07	0.6	6582	17	6
activated	0.96	1	844	63	9
sludge	0.17	0.4	2416	64	6
necessary	1.67	0.2	1612	58	9

Keyword	CPC	PCC	Volume	Score
why is return activated sludge necessary	0.87	0.1	6863	83