Indonesian WTP Contractors and How to Determine the Right System

In Indonesia, clean and drinking water quality standards are now strictly regulated under Minister of Health Regulation (Permenkes) No. 2 of 2023. This latest regulation mandates that clean water must meet strict physical, chemical, and microbiological parameters, such as a pH level between 6.5 and 8.5, turbidity levels below 3 NTU, and Total Dissolved Solids (TDS) below 300 mg/L.

To ensure your facility's water supply complies with these regulations, companies rely heavily on the expertise of an Indonesian Water Treatment Plant (WTP) contractor. Errors in initial system design can cause the produced water to fail quality standards, leading to utility damage (such as corrosion or scaling in boilers) and financial loss.

The Right System Based on Raw Water

The first and most crucial step is analyzing the characteristics of the raw water source. Each source has a different ratio of contaminants, requiring a specifically tailored technological approach:

1. Surface Water Treatment (Rivers or Lakes)

Surface water generally experiences high fluctuations in turbidity levels and contains significant Total Suspended Solids (TSS). The most effective initial solution is a Clarifier system equipped with inclined plate settlers. This inclined plate design saves a significant amount of land space (footprint) required for sedimentation compared to conventional tanks.

After the coarse particle settling stage, Indonesian WTP contractors typically filter the water further through Ultra Filtration (UF) modules. Utilizing Hollow Fiber PVDF membranes operating on a Dead-end Cross Flow system effectively lowers turbidity to below 0.5 NTU—well below the Permenkes safety limit while removing 99.9% of bacteria.

2. Brackish and Deep Well Water Treatment

Groundwater or deep well water often contains high mineral levels that make it "hard" or brackish (high TDS under 1,500 ppm). To reduce TDS down to government safety limits, Brackish Water Reverse Osmosis (BWRO) technology is the ideal choice. This system forces water through spiral-wound polyamide membranes at pressures up to 10 Bar, achieving a salt rejection rate of over 90%.

3. Seawater Desalination for Coastal Areas

If your facility is located on the coast and relies on seawater (TDS reaching 38,000 ppm), you require Sea Water Reverse Osmosis (SWRO) technology. This system operates at extreme hydraulic pressures (up to 60 Bar) to separate salt from pure water with a salt rejection rate exceeding 98%. To counteract high electricity bills caused by high-pressure pumps, top-tier system designs integrate Energy Recovery Devices (ERD).

4. Ultra-Pure Water Needs (Demineralization)

Sektor seperti pembangkit energi atau farmasi membutuhkan boiler feed water atau air ultra-murni yang syaratnya jauh lebih ketat dari standar air bersih biasa. Mengolah air menggunakan RO saja tidak cukup, air permeate harus dilanjutkan ke tahap Demineralisasi. 

Ion Exchange columns with Mixed Bed systems are used to reduce water conductivity to below 1 µS/cm. As a modern innovation that eliminates chemical regeneration (acid/caustic), industries can implement Electro De-Ionization (EDI) technology, which purifies water using a continuous electrical current.