Sewage treatment system comprised primarily of biological digestion chambers in the nature of metal cylindrical chamber and screen for use in filtering and removing settleable solids from liquid, water filtration units and water chlorination apparatus

'apparatus':35 'biolog':7 'chamber':9,16 'chlorin':34 'compris':4 'cylindr':15 'digest':8 'filter':22 'filtrat':30 'liquid':28 'metal':14 'natur':12 'primarili':5 'remov':24 'screen':18 'settleabl':25 'sewag':1 'solid':26 'system':3 'treatment':2 'unit':31 'use':20 'water':29,33

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