ISBN : 978-602-17761-0-0
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© 2013 Published by Center for Pulp and Paper through REPTech2012
the second process without a thickener unit and use a circulationrecycle of wastewater process on wet
lap machine. The irst process is the initial design of the recycling process with thickener unit.
Wastewater from recycling used beverages aseptic package process usually contains organic
and solids derived from beverages leftover in the aseptic packages, rejects and washed away pulp.
5.1 Wastewater Characterization
Wastewater process 1 has a lower pollution quality, when wastewater process 2 has a lower
water low. Although the recirculating process will decrease the wastewater low, but it is increase the
pollution quality dearly. These issues probably occurs because of the recirculating process that
used on process 2. The ratio of CODBOD are 4.1 and 9.7 for process
1 and process 2 respectively, these numbers are higher than two which means that both wastewater
have organic non biodegradable characteristic, it would be more effective to use physical-chemical
treatment processess as long as their characteristic are still suspended and colloidal.
Table 1 Wastewater Characteristics Parameter
Unit Process 1
Process 2 Flow
m
3
day 2.86
0.7 BOD average
mgl 186
354 COD average
mgl 771
3433 TSS average
mgl 250
1225 pH
7.53 7,50
Temperature
o
C 26
25 P
total
mgl 0.693
N
total
mgl 11.32
5.2. Jar Test
Jar Test experiment has been conducted to estimate the proper coagulant and coagulant aid. The data and
observation of the Jar Test were shown on table 2. Jar test experiments were conducted on wastewater process
2 as it has higher pollution quality. Based on jar test, the best coagulant alum suplhate dosage to treat wastewater
was 450 mgl, which is clear and without loating loc. The wastewater quality were then tested on laboratory to
compare the jar test with laboratory analysis. Laboratory
Hydro pulper
Biffar Screen
Drum Screen
Thick kener
Jhonson Screen
Chest Wet Lap
Machine
Figure 1. Wastewater Process 1 Scheme
Hydro pulper
Biffar Screen
Drum Screen
Jhonson Screen
Chest Wet Lap
Machine
Figure 2. Wastewater Process 2 Scheme Table 2 Jar Test Data and Observation
Sample Coagulant
Visual Note
- 50 mgl
Not clear Cloudy
SP 12 100 mgl
Not Clear Cloudy
SP 13 150 mgl
Not Clear Cloudy
SP 17 200 mgl
Not Clear A little loating loc on the surface
SP 19 250 mgl
Not Clear Floating loc on the surface
SP 14 300 mgl
Clear A little loating loc on the surface
SP 15 450 mgl
Clear A little loating loc on the surface
SP 16 600 mgl
Clear Floating loc on the surface
- 750 mgl
Clear A lot of loating loc on the surface and on the center
- 900 mgl
Clear A lot of loating loc on the surface and on the center
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analysis also concluded that 450 mgl of alum suphate SP15 has the lowest pollutant quality parameter
described by TSS, BOD and COD value.
5.3 Experiments on Wastewater
