Water Treatment Market Distribution by Type of Treatment (Membrane Bioreactor (MBR), Micro-Filtration (MF), Nano/Ultra Filtration (NF/UF), Preliminary Treatment, Reverse Osmosis (RO), Sludge treatment and Others), Type of Application (Wastewater Treatment, Zero Liquid Discharge and Others), End-User (Commercial, Industrial and Residential), Type of Investment, Type of Enterprise, Geographical Regions, and Leading Players – Trends and Forecasts 2026-2040