Water pollution due to direct discharge of industrial and sewage effluent is a major concern for developing countries that adversely affects livelihood and natural ecosystem.
Due to rising public awareness and strict regulatory compliance on discharge limit, it is ever more critical for businesses and civic bodies to effectively treat wastewater and even further to consider wastewater recycle and reuse.
Traditionally such effluent waters are initially treated with primary treatment (some of them are screening, coagulation, flocculation, dissolved air flotation, settler) after pH adjustment to remove coarse fraction and fine particulates.
Primary treatment water then passes through secondary treatment process (includes conventional activated sludge (CAS) process or integrated membrane bioreactor) to reduce organic and biological pollutants. Secondary treated water is usually within permissible limit and is therefore fit for surface discharge.
In case of effluent water recycle and reuse, tertiary treatment is employed that includes multimedia filter, activated carbon filter, ultrafiltration (UF) and reverse osmosis (RO) process. Recovered water from RO process is normally clean enough that meets WHO standards for water quality.
Reverse Osmosis (RO) reject or brine stream has high salinity levels such that in many places it is prohibited to discharge directly into the environment. Therefore, it has to go through further Zero Liquid Discharge (ZLD) process in which water is further recovered using evaporation and crystallization method. However, evaporation is a temperature-driven process which requires substantial amount of capital investment and high cost of ownership to customers.
GreenPebble Technologies owns innovative and patented membrane technologies such as membrane bioreactor, ultrafiltration (UF) and hybrid Forward Osmosis (FO) technology. Combined process and product portfolio provides customized solutions that give high water recovery, less CapEx and OpEx, high plant reliability and improved sustainability.
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