MÀNG LỌC SINH HỌC ALFA LAVAL CỦA THUỴ ĐIỂN

Nature is full of examples of smart, efficient processes, and we have been inspired by a number of them when designing our MBR modules. This has been very successful, resulting in low energy costs, minimal cleaning and high water quality. We gradually develop our MBR module systems to improve them even further, always with the same guiding principle: natural efficiency.

Alfa Laval’s unique LowResist design gives our membrane module an extremely low pressure drop. It is thanks to the ultra-low transmembrane pressure (TMP) that Alfa Laval MBR membranes require much less cleaning and maintenance that other MBRs on the market. The low TMP means there is no pore fouling, just easily removed surface fouling.

It is also the reason Alfa Laval MBR filters can run on gravity with just 1 m of water above the module, making it possible to maximize capacity in a tank without having to use pumps.

In our new model we have improved the LowResist technology to reduce the transmembrane pressure even further. The new membranes have open sides, allowing the water to flow freely into the permeate boxes. This leads to a more even pressure distribution over the membrane, which improves capacity and reduces cleaning needs.

Our latest MBR model features the S Aerator aeration system. This new, improved system minimizes air consumption during the wastewater filtration process.

Alfa Laval’s new S Aerator uses a single-line design, combined with a flush line.

The design makes it easy to turn the air on and off during operation and allows you to run your MBR membrane modules with alternating aeration. This means that in systems with more than one membrane module, air scouring is applied in an alternating manner, not continuously. This is possible without fouling becoming a problem thanks to the extremely low TMP. The big benefit is savings in energy, investment and maintenance costs.

MBR membranes are easily installed and replaced thanks to Alfa Laval’s unique QuickSwap™ technology. Alfa Laval’s unique QuickSwap™ technology means each pack can be removed individually, minimizing the lifting height required above the membrane module. This means that Alfa Laval’s MBR membrane modules are especially suitable for indoor or subterranean installations where extra lifting height means more capital cost.

Membranes are easily replaced thanks to the QuickSwap™ technology. With all of the membranes in a module mounted in packs, an entire pack can be replaced in one operation, instead of having to replace each membrane element individually.

To replace a pack, just lower the tank level, take out the old pack and put in a new one. There is no need to take the entire module out of the tank or spend time ensuring each membrane element is in place after replacing the membranes.

The new Alfa Laval MBR membrane modules only require two free sides during operation and can therefore be installed side by side in rows, thereby increasing the installed membrane density dramatically.

The range of different module sizes in combination with the low water depth required for gravity operation makes it possible to optimize usage of existing tanks and maximize the installed membrane area. With Alfa Laval’s solution you get the most membrane area per tank volume.

The high resistance to fouling and absence of pore fouling in an Alfa Laval MBR membrane makes it possible to operate the bioreactor with up to 50% higher concentrations of suspended solids than other manufacturers’ filters.

Combining these factors means you get maximum capacity per tank volume with Alfa Laval MBR membranes.

The membranes are a key part of a MBR wastewater treatment plant and in the treatment of industrial wastewater. We develop and manufacture all membranes used in our MBR modules ourselves to ensure the highest quality and best durability. The membranes are made of chlorine resistant PVDF and have been specifically optimized for use in wastewater applications.

The membranes provide an absolute barrier to bacteria, microplastics and several other pollutants, and the treated water is guaranteed to meet the requirements for water reuse or environmentally responsible discharge.

Alfa Laval MBR membranes are easy to operate and can be fully automated. All important aspects, such as air scouring, cycle lengths and CIP can be initiated, controlled and monitored remotely. The only required manual work during the MBR water treatment with our modules is making sure the cleaning chemical tanks are filled.

The resulting personnel requirements are thus very low, normally around 1/4 full-time operator equivalent per plant.

The ultra-low transmembrane pressure and absence of pore fouling means very little cleaning is needed. During normal operation it is enough with a 2 minute relaxation period every 10 minutes for the scouring air to remove the surface fouling.

There is no need for frequent backflushing or chemically enhanced backwashing – only a one to two hour CIP cleaning every two or three months. The time savings compared to other MBR systems are very large.

The long CIP cleaning cycles also brings the benefits of minimizing wear on the membranes and chemical usage.