The influence of type of reactor (CSTR, completely stirred tank reactor and airlift) and type of influent (lithoautotrophic medium, lithoautotrophic medium plus acetate and lithoautotrophic medium plus complex wastewater) on exopolymeric substances produced by a nitrifying sludge (proteins, carbohydrates and lipids) as well as its relationship with sludge settleability was...