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Wastewater Treatment(Selected Case Studies)

JOHANNES ANDIGAN SINAGA

10/296550/TK/36165

JTSL FT-UGM

2012/2013

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1. Singapore Location : Singapore Water Reclamation Study (NEWater Study), Singapore

Flow diagram process :

The main process : Secondary effluent pumping combined with chlorine dosing and equalization

tank;

Microfiltration: 6 units of 480S10T CMF-S cells; Filtered water storage combined with chlorine dosing; 5 units of two-stage (49 vessels 1st stage, 24 vessels 2nd stage, 7

elements/vessel) RO trains;

3 units of UV irradiation for disinfection; and Product water storage and pumping combined with pH and chlorine control.

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2. Tokyo, Japan Location :Ochiai Water Reclamation Center for Meguro River Restoration,

Tokyo (by Tokyo Metropolitan Government)

Sequence of Treatment Units :

The main process : Preliminary and primary treatment : Grit Chamber and Primary Sedimentation Tank Secondary treatment : Activated Sludge Process (ASP) Tertiary treatment : A2O process for nutrient removal, sand and

Membrane Filtration and UV Radiation

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3. Berlin, Germany Location : Nordkanal Wastewater Treatment Plant, Willich, in North Rhine

Westphalia

Integrated Water Cycle Management :

The flow diagram below shows this cycle which proceeds in the following order:

water intake - drinking water supplysewage and stormwater purification -

dilution and self purification in the remaining waters - bank filtration and

groundwater replenishment - water intake.

Process flow (Membran Bioreactors MBRs ):

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4. Balikpapan, Indonesia Location : WWTP MargasariBalikpapan

Process flow:The treatment is based on an activated sludge process.Before the wastewater

enters the aeration tank a screen removes solid waste from the wastewater. The

wastewater is pumped into an equalization tank which serves probably as well as

sand trap. The bacteria mass is separated in a clarifier and recycled back to the

aeration tank. The treated water flows into a control tank. A chlorination

installation is not used. The sludge is pumped to a sludge tank. Up to now the

sludge is then pumped direct into the river . By discharging the sludge to the river

the whole treatment process becomes obsolete and the river is almost as polluted

as without treatment.

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Source:

Mediterranean Wastewater Reuse Report, Annex B: Case Studies byMEDITERRANEAN WASTEWATER REUSE WORKING GROUP (MED WWR WG),

November 2007 Review of Wastewater Reuse Projects Worldwide, IIT Kanpur, December 2011 Nordkanal Wastewater Treatment Plant, General Electric Company, 2008 COMPARATIVE STUDY CENTRALIZED WASTEWATER TREATMENT PLANTS IN

INDONESIA,Development Alternatives, Inc. for the United States Agency for

International Development, September 2006