Global Ozone Generator Market By Type (High-Voltage Discharge Ozone Generator, Uv Lamp Ozone Generator, and Electrolytic Ozone Generator), By Application (Potable Water Treatment, Industrial Wastewater Treatment, Municipal Wastewater Treatment, and Gas Denitrification), By Region and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028