Supply Of Flocculant Using Cationic Polyacrylamide, With A High Degree Of Stability, Intended For The Thickening And Dehydration Of The Sludge From The Palma 1 Wwtp And Anionic Flocculant For The Physical-Chemical Treatment (Operation Of The Tertiary And Additional Secondary Treatment (Tas) Of The Palma 2 Wwtp.