Upgrading the ROCHEM wastewater treatment system at Stella factory, capacity of 100 m3/day clean water output

1. Scope of work

• Technical proposal, Design plan to upgrade the existing system;
• Purchase materials and equipment to upgrade the system;
• Transport the system to the construction site;
• Complete installation and acceptance of the system;
• Test the performance and reliability of the system;
• Prepare working procedures and training for operating staff;
• Support the Investor with procedures and licenses to upgrade and renovate the system for relevant departments/ministries;

2. Current status of the wastewater treatment system

Wastewater entering the equalization tank will be pumped through the stainless steel pre-treatment tank cluster

Then, the wastewater will enter the reduction tank to remove H2O2 and continue to the intermediate tank before entering the ROCHEM system (RO ROCHEM system installed by a unit from Germany)

The filter pump and sand filter system is designed for a capacity of 5 m3/h, but currently there is a frequent problem of sand filter blockage. The input pump uses a submersible pump that does not meet the pressure head when the sand filter is clogged

The existing ROCHEM system is designed with a capacity of 3.5 m3/h with 17 PFRO modules divided into 2 stages with stage 1 having 4 modules and stage 2 having 13 modules

The current status is that the membranes and discs in stage 1 and stage 2 modules have been completely damaged.

Request to upgrade ROCHEM RO system to 100 m3/day.night and output water meets the standards as shown in the following table:

3. Proposal for upgrading the pharmaceutical wastewater treatment system

• Adjust the old and new wastewater pipeline system to the tanks to create a suitable and effective way for water to enter the intermediate tank before entering the RO ROCHEM system
• The system needs to be upgraded and installed with additional reaction compartments to increase the reaction time in the Fenton compartment to remove the difficult-to-decompose COD components in the wastewater to remove and treat COD to reach 40 – 90%
• The water after fine filtration is fed into the reverse osmosis membrane system designed to produce 100 m3/day of clean water with a maximum recovery rate of 91%.
• The reverse osmosis membrane system includes a high pressure pump system, a booster pump that can still meet the demand when increasing the capacity to 100m3/day and measuring devices to control the parameters.
• An existing membrane cleaning system (CIP) has been integrated. Anti-scaling chemicals are also added to ensure performance and protect the membrane. The entire system is automatically controlled by PLC

4. Results of the pharmaceutical wastewater treatment system upgrade project

After TVTS upgraded the pharmaceutical wastewater treatment system, the system achieved the following results:

• Wastewater after treatment meets customer requirements
• The system operates stably, is periodically checked by TVTS technicians
• The factory staff is well trained, instructed and trained to operate to meet job requirements