Environmental Engineering Reference
In-Depth Information
Results and Discussion
Characterization of Wastewater
The pilot plant was installed in the ion exchange resin manufacturing facility
located in Ankleshwar, Gujarat to understand the actual operational conditions
and the associated difficulties. The manufacturing facility was already having a
state of the art effluent treatment facility consisting of collection tank, solids
contact clarifier, aerobic reactor based on membrane technology and hence, it
was decided to install the pilot plant after clarifier (Fig. 2 ) in order to get rid of
suspended solids which are polymeric in nature and non-biodegradable and rep-
licate the future condition. Hence, the samples were collected from the outlet of
solids contact clarifier and the characterization is given in Table 1 . The effluents
were rich in organics with high COD (7,000-8,000 mg/L), BOD (2,500-
3,500mg/L)andTDS(15,000-25,000mg/L)values.Presenceofhighorganics
in the wastewater was due to unused chemicals and washing of reactors. Apart
from these harsh parameters, the BOD/COD ratio (0.3-0.35) is not very much
favourable for biological treatment.
CLARIFIED
/ BUFFER
TANK
BIO EQT
HRSCC
UASBR
LAMELLA
SLUDGE PIT
PRE
AERATION
TANK
AERATION
TANK
TREATED
WATER TANK
MBR
TANK
Treated effluentwill be treated via reverse
osmosis system to recover water and reject
will be treated through evaporator to
achieve ZLD
Existing
Proposed
Fig. 2 Schematic diagram of effluent treatment plant for resin manufacturing facility
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