AnoxKaldnes™ LagoonGuard™

Enhancement and upgrading of aerated lagoons

Aerated lagoons are used extensively around the world for treatment of both municipal and industrial wastewaters. In North America, thousands of larger lagoons treat municipal wastewater. These systems can efficiently remove COD and BOD but nitrification is not readily accomplished during the cold season. As municipalities with aerated lagoons are increasingly required to limit the release of ammonium to receiving waters they are facing the hard choice of whether to build an expensive all new process or to somehow upgrade the lagoon in order to obtain cold weather nitrification.

Our solution

At AnoxKaldnes we believe that lagoons are simple and have many benefits. So why not let them continue to do what they already do, very economically and efficiently, and possibly more with a little help. Our solution is the AnoxKaldnes LagoonGuard biofilm process upgrade.

Easy and economical

The AnoxKaldnes LagoonGuard biofilm process is a well-designed moving bed biofilm reactor (MBBR), typically after the lagoon, which can be customized to meet BOD and ammonia requirements. The upgrade is easy and economical, compact and, in the spirit of the lagoon itself, the LagoonGuard process upgrade requires a minimum level of operation and maintenance. The LagoonGuard process prolongs the usefulness of existing lagoon systems that find themselves under strict new effluent demands.

Benefits

• Enhanced COD and BOD removal and nitrification.
• Extremely small foot-print Compared to an aerated lagoon, the LagoonGuard process uses less than 3 % of the area. Thus, it can easily be incorporated without significantly increasing the area requirements.
  Easy to operate Once a nitrifying biofilm has been established on the carriers, the process needs very little maintenance.
• Efficient ammonium removal More than 95% ammonium removal is easily obtained.
• Sturdy Nitrifiers are frail bacteria that grow slowly, especially at low temperatures. The LagoonGuard process
• guards the nitrifiers against periodic unfavorable conditions that otherwise may kill them.

Applications

• Pulp and paper mills
• Municipalities