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A strainer is one means for preventing the invasion of golden mussels (Limnoperna fortunei) into water facilities. To prevent decreased strainer function as a result of adhesion of golden mussels to the fi lter element surface, we have studied the applicability of copper alloys as fi lter media with antifouling properties. Water fl ow experiments were conducted using an automatic backwash strainer (fi lter rating: 30 μm) made of cupronickel or brass alloy in Lake Ohshio, Gunma, Japan, which is a habitat of golden mussel. For both copper alloys, no invasion of juvenile mussels into the pipe downstream of the strainer was observed, and no adhesion of mussel was observed on the fi lter surface. As described above, the copper alloy was found to be effective as a fi lter material for countermeasures to golden mussel invasion. However, corrosion in the water fl ow section of the strainer was observed owing to the destruction of the oxide fi lm. Hence, the use of copper alloy was found to require corrosion protection.

mizu kankyou gakkaishi/mizu kankyō gakkaishi

Evaluation of Applicability of Copper Alloy as Filter Medium for Strainer Used to Remove Golden Mussel (&lt;i&gt;&lt;b&gt;Limnoperna fortunei&lt;/b&gt;&lt;/i&gt;)