ABSTRACT:
There are wide range of wastewater treatment techniques emerging
which include biological processes and physical-chemical processes. It is
also includes techniques based on electrochemical technology which
include electrocoagulation (EC). Electrocoagulation (EC) is becoming a
popular process to be used for wastewater treatment. The objective of
this study is to evaluate the EC & CC for improving wastewater quality,
such as increasing removal efficiencies of COD. Alum was used as
coagulant for chemical coagulation process at various doses and various
sedimentation time. Also the performance of the Electrocoagulation (EC)
was examined at constant operation time, various current density and
various sedimentation time. For each set of experiments COD were
analyzed for both EC and CC. Steady state COD removal was achieved
at Alum dose 60 and 120 mg/l and settling time stated from 180 min.
COD removal with the various settling time was examined by varying the
applied current between 0.4, 0.8, 1.0, 1.5 and 2.0 A with constant
operating time at 40 minutes followed be settling time till 240 min.
according to the results obtained in this study EC gave better
performance on the COD removal ratio, EC was more effective with 45%
than chemical coagulation.