These electrical pigs, which look like child-sized Volkswagen Beetles, have only one task to perform: clean the 60 million ... [built by German company Thermo-System GmbH] are operating all ...

“The pigs looked healthy and happy and seemed ... “This would typically require two people to carry out, and if a folding system is not used, cleaning is harder and more time consuming.’’ ...

A novel nitrate removal system can clean up the wastewater produced by swine farms. Anyone who lives in Okinawa, a subtropical island in Japan, has an appreciation of the intensity of its pig ...