<story><title>Sound waves used to separate microplastics from laundry wastewater</title><url>https://newatlas.com/environment/sound-waves-microplastics-laundry-wastewater/</url></story><parent_chain></parent_chain><comment><author>nudgeee</author><text>Back in 2006 I was contracted to design a power amplifier prototype for the civil engineering department of a university.&lt;p&gt;We built an adjustable 500W h-bridge based amplifier (operating between 50kHz to 300kHz+) which was used to drive transducers to create standing waves for waste water treatment, and it seemed to work alright in a bunch of our tests, but at fairly low flow rates.&lt;p&gt;We passed the prototype on to the client (I think it was for a joint project between Monash University and Melbourne Water), not sure where it ended up. Great to see the technique being applied in consumer applications :)</text></comment>
<story><title>Sound waves used to separate microplastics from laundry wastewater</title><url>https://newatlas.com/environment/sound-waves-microplastics-laundry-wastewater/</url></story><parent_chain></parent_chain><comment><author>aSplash0fDerp</author><text>If this works like non-newtonian fluids, I imagine &amp;quot;finding the right shape&amp;quot; or series of tones&amp;#x2F;patterns works well in bulk.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;m.youtube.com&amp;#x2F;watch?v=SYMvOxIsES4&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;m.youtube.com&amp;#x2F;watch?v=SYMvOxIsES4&lt;/a&gt;&lt;p&gt;I don&amp;#x27;t have any hard numbers, but it almost seems like we could easily spend a trillion dollars fixing a problem caused by a 100 billion dollar industries by-products.&lt;p&gt;What would a carbon credit scheme look like if it were for microplastics?</text></comment>