DESIGN AND TESTING OF PROTOTYPE NEW WATER TREATMENT PLANT (NWTP) PT KRAKATAU TIRTA INDUSTRI LABORATORY SCALE
PT Krakatau Tirta Industri (KTI) is a company engaged in water supply and treatment. PT KTI has two treatment plants to meet the needs of clean water for the community and industry in Cilegon City. However, over time, the need for clean water, especially for industrial purposes, continues to incr...
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Format: | Final Project |
Language: | Indonesia |
Subjects: | |
Online Access: | https://digilib.itb.ac.id/gdl/view/86288 |
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Institution: | Institut Teknologi Bandung |
Language: | Indonesia |
Summary: | PT Krakatau Tirta Industri (KTI) is a company engaged in water supply and treatment.
PT KTI has two treatment plants to meet the needs of clean water for the community and
industry in Cilegon City. However, over time, the need for clean water, especially for
industrial purposes, continues to increase. Therefore, PT KTI plans to increase production
capacity, by building a New Water Treatment Plant (NWTP) with a capacity of 600 L/sec. The
Basic Engineering Design (BED) document for the NWTP has been prepared and will be
continued with the preparation of Detail Engineering Design (DED) supported by laboratory
studies using laboratory scale models (prototypes). The prototype that will be tested consists
of combined units, namely Aero-Coagulator and Clearator which represent aeration,
coagulation, flocculation, and sedimentation processes. The prototype is designed with a scale
of 1:1000 of the original capacity. This study was conducted to determine the prototype
conditions, hydraulic conditions, and processing conditions. Based on the study, the prototype
is able to drain water from the raw water tank to the treated water tank. However, there is
water loss due to leakage and water jumping in the range of 10% - 28%. The water loss was
measured and it was found that the lowest water loss occurred at a capacity of 8 L/min, so the
optimum capacity determined in this study was 8 L/min. The apparent residence time was also
determined based on hydraulic experiments using a tracer solution. It was found that the real
residence time of the treatment was about 380 minutes. The last experiment was conducted to
determine the treatment process. Treatment experiments were conducted for three raw water
conditions, namely original raw water, raw water with high turbidity, and raw water with high
color. Jar tests were conducted for all three conditions with the optimum dose of coagulant in
the range of 60 - 80 ppm. The treatment experiment showed good results (reaching the target)
with the achievement of turbidity concentration of 2.5 NTU, color of 2 Pt-Co, and iron (Fe) of
0.18 mg/L. |
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