Silver-plated copper lead frames can get corroded easily by the aforementioned gases if any Sewage treatment plant, heavy traffic, or open drains are located near it. The concentration of these gases can be as low but still cause significant corrosion. The lead-free regulations for electro

Biological systems are being chosen for municipal or industrial wastewater treatment plants, keeping in mind the lower operating cost for long- run. Biological oxidation technologies are divided into three processes, named as Biofilter, Bio-Trickling filter and Bio-scrubber. Though basic