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Zarka Central Industrial
Wastewater Treatment Plant Project
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Idea and Concept
The idea and concept for establishing an industrial wastewater treatment plant
IWWTP came as a joint initiative by Zarka Chamber of Industry and the Jordanian
Ministry of Environment and Water Authority. The aim of the project is to
develop an economically and environmentally sound system to handle the
industrial wastewater effluents of industrial establishments in the Zarka
governorate. An initial study in logistics concluded that a central IWWTP is
more economically, technically and environmentally viable than several smaller
treatment plants at each factory.
Study Objectives
The TOR for a detailed feasibility study were prepared to determine the
following:
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An
assessment of industry interest to use a central IWWTP and their willingness to
pay for its services.
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Identification
of treatment alternatives and site locations.
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Feasibility
study of the proposed central IWWTP to demonstrate the economic viability of
the project, including preliminary design, financial analysis and institutional
aspects.
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Environmental
impact assessment (EIA) of the preferred scheme.
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Study
Stages
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A
consortium of the German Dorsch Consult and the local EnviroConsult Office were
chosen to undertake the study.
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A
detailed study was concluded to determine the volume and characteristics of
industrial wastes generated by industrial establishments.
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A
conceptual design for the IWWTP was developed to treat 1450 cubic meters per
day by four pre-treatment units to extract heavy metals, fats, oil and grease
(FOG), weak organics, and Strong organics .
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An
Aerobic Activated Sludge process was chosen as the Main Treatment Line.
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A
Sludge thickening and dewatering unit.
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Area
and Location of IWWTP
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Several
potential locations for IWWTP were considered. An area south of Zarka Free Zone
was finally chosen due to its level contours, accessibility, good gradient for
construction and irrigation, isolation (minimal odour control), good ground
conditions and minimal environmental adverse effects .
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A
land area of one million square meters was estimated as required to establish
the IWWTP and to be planted with cash Crops (Olives, Timber) irrigated with
treated industrial wastewater.
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Treatment
Units
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Heavy metals pre-treatment: 20 m³/d.
- FOG pre-treatment: 600 m³/d.
- Mechanical pre-treatment for organics: 645 m³/d.
- Anaerobic pre-treatment for strong organic:185 m³/d.
- Aerobic Activated Sludge main treatment:1450 m³/d.
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The
sludge is thickened, dewatered, conditioned and stored.
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The
process units were designed and arranged in a modular concept so that
additional units can be installed at a later date as the demand and loads on
IWWTP increase.
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Additional
options were considered for a future extension including a gas
dome,de-sulphurisation and power generation. Effluent sand filtration and
disinfection (chlorination, ozone or UV). Odour control. Evaporation ponds for
hazardous effluents.
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Tariff
structure
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A
tariff structure was proposed on the principle of the “polluter pays”.
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Industries
will pay according to volume of flow with surcharge tariff on pollutant loads.
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Tariff
was calculated to achieve cost recovery.
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The
tariff is sensitive to the final investment costs and sources of funding.
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The
tariff rates are competitive with the real comparative costs of the industries
providing their own individual treatment facilities.
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Proposed
Tariff Rates
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The
following tariff rates were proposed:-
Hydraulic Load JD 0.500/m³ *
COD Load above 1500 mg/l JD 0.100/kg
FOG Load above 200 mg/l JD 0.500/m³
Heavy metals contaminated JD 2.000/m³
Wastewater
* Prices were calculated on the following exchange rates (1JD= 1.16 € ; 1€=
1.208 $)
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The
TDS load was not part of the tariff since no treatment was available. High
conductivity wastewater will not be accepted at the plant.Wastewater
will be transported from different industries to IWWTP by tankers which will
cover distances varying from 3 to 35 km (average 20 km).
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Use
of public tankers or tankers owned by IWWTP or the industries generating
wastewater will be optional (whichever is cheaper).
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For
cash flow assessment an average transport rate of JD 0.600/m³ was considered.
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Environmental
Impact of the Project
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The
project assures protection of the limited water resources and the environment.
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Reduce
the loads on the existing domestic wastewater treatment facility.
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The
project provides the opportunity to transfer the treatment burden to a third
party, enabling industry to develop.
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The
project will facilitate the controlled reuse of treated industrial water.
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The
project will enhance forestation activities in Zarka.
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Economic
Assessment
The economic assessment confirms that the project in its own rights is marginal
as a viable commercial private project. but recognizes its environmental
benefits and concludes that the project would be commercially viable with a
moderate level of grants and soft loans.
Project Costs
The total cost of the project was estimated to be around five million USD.
Laws and Regulations
A high demand for the services IWWTP will be assured by the government’s
willingness to implement strong laws and regulations on the environmental
problem of industrial wastewater. If enacted laws and regulations are enforced
firmly the proposed project would be in a virtual monopoly position and,
therefore, able to maximize returns by fuller utilization.
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