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Keywords:
BACTERIA,
PURIFICATION,
WATER,
BACTERIAL,
NATURAL,
RIVERS,
SUN,
LIGHT,
SEDIMENTATION,
DILUTION,
FILTRATION,
ARTIFICIAL,
STORAGE,
MICROORGANISMS,
SAND,
SLIME,
TEMPERATURE,
ANALYSIS,
REGULATIONS,
BACTERIOLOGY,
PROCESS,
ALGAE,
CHEMICALS,
OXIDATION,
EFFICIENCY,
DEE,
SCOTLAND,
THAMES,
LEE,
UK,
GERMANY
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© Thomas Telford and ICE
1897
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