Wastewater Treatment Plant that Works for the Printed Circuit Board and Electronics Industry
Every printed circuit board (PCB) shop is unique. They use different chemicals and generate varying liquid waste with metals and other contaminants. Each shop will have different waste treatment priorities arising from its own unique combination of product specialization, government regulation, and economic factors.
A successful waste management plant must be custom designed to address all the process characteristics and management priorities. An economical solution must combine the custom design with standard treatment equipment that works.
Kurion has developed a range of standard stand-alone technologies which can be combined into a Wastewater Treatment Plant that with configurations meet each company's needs. After gaining a thorough understanding of the customer's process, Kurion evaluates the features and benefits of each Kurion technology to develop a waste treatment plant designed to meet the customer's specific goals. These goals may include the following:
■ Compliance with discharge limits
■ Sludge reduction
■ Metals recovery
■ Water Recycling
■ Reduced capital costs
■ Reduced operating costs
Engineering services and standard products for a goal-oriented waste treatment solution
Standard wastewater treatment plant can be arranged in a custom configuration to address each printed circuit board shop's specific objectives. Kurion uses a four-step engineering process to accomplish this.
1. Define the waste problem
Kurion's engineers prepare a detailed description of the PCB shop's process with a hands-on | | site survey. This defines each process step, rinsewater flow rates, Volume and frequency of dumps, and the concentration of chemicals and metals in rinsewater and concentrates.
2. Define the waste treatment plant
We analyse the survey data and combine the waste streams into chemical categories for treatment. Often, several alternatives are prepared with an economic analysis of each option for review with the customer.
3. Evaluate treatment technologies
Kurion evaluates the economics and expected performance of waste treatment technologies. The goal is to get the system design right the first time by fully evaluating all the factors during design.
4. Integrate the Waste Treatment Plant into your facility
During the site survey, we measure the area available for installing the equipment and survey the services required and access for equipment and supplies. We ensure our equipment will integrate into the plant processes to meet the customer's objectives.
PCB waste treatment to achieve specific goals
Waste treatment begins with collection of rinses and concentrates from the printed circuit board manufacturing processes. A treatment plan combining segregation of concentrates and rinses with appropriate standard treatment | | technologies can be managed to achieve various treatment, sludge minimization, and resource recovery goals. Goal: Compliance with Discharge Regulations
The simplest treatment is a metal precipitation process designed to meet discharge limits. This “end-of-pipe” concept, the lowest capital cost option, employs Kurion's Two Step reaction system combined with cyclone settlement technology. Limits of 1.0 ppm copper and 0.4 ppm lead are achievable. Limits of 0.1 ppm copper and 0.1 ppm lead are achievable with the IX polishing technology. Lower limits are achievable with special chemistry and waste segregation.
In order to reduce the size and cost of the end-of-pipe system, a segregation plan allowing all non-metal rinses to be directed to the final Neutralization System prior to discharge is recommended.
Separate handling is required for some concentrates which may be hauled to a materials recovery facility for recycling.
Other wastes, such as permanganate or dry film stripper and developer dumps, require treatment with Kurion's Batch Treatment System or TREAT-RESIST. 
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