DAUR ULANG AIR LIMBAH (WATER RECYCLE) DITINJAU DARI ASPEK TEKNOLOGI, LINGKUNGAN DAN EKONOMI

Nusa Idaman Said

Abstrak


 In line with fast growth of populations in urban area the discharged waste water from
daily activities have caused contamination of ground water and also surface water.
Unbalance between distribution of source and usage of water have caused unbalance
between supply and demand. Therefore, new innovation in the case supply of raw water
has come to important attention. One of the alternatives which getting much attention in
many state in world is to use recycle wastewater especially municipal wastewater as one
source of raw water for water supply
Several things which need to be paid attention in the case of usage of recycle wastewater
are consistency of the treated water quality as according to enabled condition. In usage
of recycle wastewater to be used as clean water supply there is several categorize of
contaminant which must be paid attention peculiarly namely for example organic
contaminant including pesticide, pathogenic bacteria, parasite, virus and also heavy
metal contaminant for example mercury, lead, chrome, cadmium etc. Therefore the
treatment process must be done neglectlessly with control of quality which able to be
justified.
One of the concept for processing of urban wastewater to be made clean water is use
combination of primary treatment, secondary treatment with biological process continued
by advanced treatment by physico-chemical process for example covering clarification
process, nutrient removal, recarbonation, filtration, adsorption with activated carbon, ion
exchange process, and also demineralization with process of reverse osmosis and also
ozonization and chlorination. With these processes combination can treat wastewater
yield treated water with quality of as drinking water.
This paper explained some example of wastewater treatment process for recycle
wastewater which have been applicated in some state. One of the example of
wastewater recycle process using combination of biological process continued with ultra
filtration process, reverse osmosis process, and disinfection by ultraviolet, and also pH
control such as those which have been conducted by NEWATER Factory, Singapore.


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