Clean-in-Place (CIP)

Clean-in-Place (CIP)

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Models Available
CIP Chemicals and CIP Service

Suez (Formerly GE Water) / Minncare / Chemtreat

A reverse osmosis unit's reliability is an important consideration for anyone dependent on its smooth operation. Routine membrane cleaning and system maintenance is essential for dependable operation.

Good maintenance practices improve reliability and reduce operating costs. Treatment chemicals can be an important part of a comprehensive maintenance program. Preventative maintenance can be enhanced through the targeted use of chemicals to minimize fouling, deposition and precipitated scales. When circumstances call for remedial action to restore performance, specialized chemicals can bring a system back to acceptable operation at a reasonable use cost. These materials can be applied on-site by the user, or the process can be performed off-site with several additional benefits.

When a new set of reverse osmosis elements is installed, performance begins to decline immediately. Membrane manufacturers tell us that normalized flux declines by roughly 10% in the first 30 days of operation. This is truly a best case scenario, as it takes into account only the properties of the reverse osmosis membrane itself and does not take into account the many physical, chemical and biological processes that may combine to further reduce membrane performance.

Feedwater quality is a major determinant in the rate of performance decline a membrane system experiences. Suspended materials present in the water source foul elements beginning with the first stage. This can result in increased pressure differential and reduced flux. Dissolved minerals are concentrated as the feed passes through the brine-side of the membranes. As the mineral concentrations increase beyond saturation, salts precipitate. These salts tend to form in the tail elements first. The result is reduced flux and increased pressure drops in the final array. Bacteria can grow in any water, but they grow best in warm waters, and their optimal growth range overlaps with the typical feedwater temperature of reverse osmosis systems. Also, bacterial slimes can form in any part of the system. In practical experience, no one type of fouling occurs in isolation. In fact, each can influence the others, and it is common to have more than one problem foulant.

Recommendations for Clean-in-Place
Successful CIP requires planning and proper control of key system parameters. The most important parameters for cleaning are the cleaning chemistry, solution temperature, flow rate per vessel, pressure drop and use of soak times. Frequently, the effects of temperature, flow and soak times are ignored. Bear in mind that most reverse osmosis systems experience mixed deposits, so a single cleaning may not be effective.

Newterra has a dedicated and experienced Service and O&M Team.  Schedule your routine maintenance today!