ID 4168671270 © Antikainen | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
activated aerated area bacterium basin big biology biomass bionomics cement chemical clean clear concrete conservation construction dirty ecology effluent engineering environment environmental factory frame group industry organism plant pollution pool purification purified purity recycle recycled recycling rusty settler sewage site slimy sludge steel storage tank treatment unhygienic wastewater water