Chapter I - INTRODUCTION

1.0 Biological Waste Water Treatment:

Wastewater treatment embraces numerous techniques

to produce effluent suitable for the survival of flora and

fauna, after having been polluted by chemicals, sanitary

wastes, oils, and the like. Various methods for the treatment of

wastewater have been described and invariably these methods

are used in a sequence to suit the wastewater treatment

requirement The treatment of water-soluble compounds that

cause depletion of oxygen in the wastewater as well as

surrounding areas around it, have been the target of many a

study and the most proven systems for the treatment of such

wastewaters has been by the "biological" route (Singh S K et.al.

1992).