Decolorization of Reactive Dye by Electrochemical Oxidation Using Graphite Electrode

摘要

Decentralized Wastewater Treatment Systems (DEWATS) is rather a technical approach than merely a technology package. Generically, DEWATS are locally organized and people-driven systems that typically consist of a settler, anaerobic baffled septic tank, filter bed of gravel, sand, plantation-beds and a pond. The open pond or the polishing tank stores the remedied water and keeps it available for re-use. The system operates without mechanical means and sewage flows by gravity through the different components of the system. Up to 1,000 m3 of domestic and non-toxic industrial sewage can be treated by this system). DEWATS applications are based on the principle of low-maintenance since most important parts of the system work without electrical energy inputs and cannot be switched off intentionally. These provide a range of treatment options from simple, passive treatment with soil dispersal, commonly referred to as septic systems, to more complex approaches such as advanced treatment units and discharge to either surface waters or the soil. These are installed near wastewater generation point (CDD 2015). DEWATS can also treat municipal waste. The recycled water is used for irrigation and is absolutely safe for human use. In certain urban areas the processed water is used for flushing toilets.