4 Treatment Technologies of Fresh Market Wastewater
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treatment efficiency. The four sand filtration systems were constructed in transparent
plastic column with the size 260 mm of height, 80 mm of top diameter and 24 mm for
bottom diameter. A hole at the bottom is presented as a channel for effluent disposal.
There are three media used in this study which are fine sand, coarse sand and activated
carbon (rice husk and coconut shell) with 0.06 mm, 2.00 mm, and 0.08 mm in their
effective size, respectively. Four types of sand filtration were used in this study such
as (a) sand filtration, (b) sand filtration with coconut shell, (c) sand filtration with
rice husk and (d) sand filtration with rice husk and coconut shell (Fig. 4.7).
The characteristics of wastewater are BOD 137.03 mg/L, COD 350.27 mg/L,
TSS 126.4 mg/L and NH 3 −N 45.81 mg/L while efficiency removal of four types
Fig. 4.7 Schematic diagram of sand filtration system
73
treatment efficiency. The four sand filtration systems were constructed in transparent
plastic column with the size 260 mm of height, 80 mm of top diameter and 24 mm for
bottom diameter. A hole at the bottom is presented as a channel for effluent disposal.
There are three media used in this study which are fine sand, coarse sand and activated
carbon (rice husk and coconut shell) with 0.06 mm, 2.00 mm, and 0.08 mm in their
effective size, respectively. Four types of sand filtration were used in this study such
as (a) sand filtration, (b) sand filtration with coconut shell, (c) sand filtration with
rice husk and (d) sand filtration with rice husk and coconut shell (Fig. 4.7).
The characteristics of wastewater are BOD 137.03 mg/L, COD 350.27 mg/L,
TSS 126.4 mg/L and NH 3 −N 45.81 mg/L while efficiency removal of four types
Fig. 4.7 Schematic diagram of sand filtration system