The publications listed below form a part of this specification to the extent referenced. The publications are
referenced in the text by basic designation only.
A1) Technical Specification:
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All types of diesel fired incinerators suitable for HCW may be offered as long as they can
safely treat medical waste. The equipment should be compliant with all requirements for
installation in Kenya. All components for installation must be included.
Technical evaluation will consider the entire system including the treatment plant. It will be
the responsibility of the Bidder to supply a full system, including all necessary secondary
systems and/or additional equipment.
The calorific value of the generated waste from the healthcare facilities differs from 5,000 kJ/kg
(e.g. pathological waste) up to 40,000 kJ/kg (filled sharp boxes) with an expected average
heating value of waste of 14,000 kJ/kg.
An approved plant must have four distinct sections that demonstrate three principles of
Turbulence, Residence Time and Temperature inbuilt in the plant design .The regulated sections
may include but not limited to:
Overall plant layout
Feed chamber/ charging
Primary Combustion Chamber
Secondary Combustion Chamber
Acid Gas Scrubbers
The stack/ chimney
For the main incineration process, a static, two chamber system is required with one main
combustion chamber and one flue gas afterburning chamber. The incinerator must be able to
meet the following parameters:
Treatment capacity of: a) 50 kg waste per hour.
Temperature: Main combustion chamber up to 850°C, and in the second chamber > =
Retention Time: 2 seconds in the second chamber
The furnace (including secondary combustion chambers etc.) dimensions must be large enough
to provide for an effective combination of gas residence time and temperature such that
combustion reactions may approach completion and result in low and stable CO and VOC
In order to avoid the generation toxic gases, the incinerator must combine the gasification or
pyrolysis stage with a subsequent combustion stage with flue-gas treatment that provides for
operational emission levels to air within the associated emission ranges specified in the standards
for incinerators which are described in the ENVIRONMENTAL MANAGEMENT AND COORDINATION
(WASTE MANAGEMENT) REGULATIONS 2006 of the Republic of Kenya.
Where grates are used, it is preferred that the design incorporates sufficient cooling of the
grate such that it permits the variation of the primary air supply for the main purpose of
combustion control, rather than for the cooling of the grate itself. Documents to be
provided by the Bidder in response to this RFP.
Complete information on how the equipment matches the Technical Specification.
Include an additional statement with a calculation and description of all cost related to the
normal running of the plant over a 12 month period.
Full description of the system(s) being proposed.
Lay out drawing with all main equipments, flue gas ductwork and main piping.
Piping and Instrumentation Diagram.
Operation manual in the English language.
Implementation plan and training concept.
Installation and maintenance plan.
Detailed list related to wear and spare part package for 2500 h operation (items which
will be included in the contract). The list should be detailed enough to allow PATH to
carry out a cost estimation.
Other information such as process description, brochures, etc. should be only added if
the information will be useful for the technical evaluation of the treatment process.
A2) Technical Specification:
Medical Waste Autoclave
Manual autoclave with vertical loading; gravity displacement type with possibility for Vacuum.
Capacity: Up to 12 kg/h
Chamber size: >150 liters
Material: Stainless steel
Temperature: 134 °C
Minimum autoclave chamber size shall be 150 liters and shall have a usable volume
(loading basket) of 100 liters.
Shall work according to gravity air displacement principle.
The vacuum system shall be of a thermal shock type.
The pressure vessels should be pressure tight, the rising of the pressure (at a start pressure
of below 80 mbar) shall be lower than 1 mbar/min.
With in-build electrical heating elements for steam generation (heating elements > 4000
Chamber and door shall be made from high quality stainless steel (e.g. AISI 3161).
Chamber in vertical position, it shall allow an easy loading/unloading of the loading
2 Baskets of >100 l for the loading and unloading of waste shall be included. The baskets
shall be designed for the usage of non-heat resistant waste bags, a system for the
collection and controlled release of free liquids and condensate from the waste shall be
The temperature measured at the reference measurement point of the treatment chamber
shall not be lower than 105°C (TDes 0+4). The treatment time shall be ≥30 minutes at
105°C, ≥20 minutes with a temperature used of ≥121°C (TDes 0+4) and ≥10 minutes
with a treatment temperature of ≥ 134.
The steering of the treatment process should be semi-automatically as well as manual.
The Treatment Equipment shall be equipped with at least the following instruments:
o treatment chamber temperature indicating instrument
o treatment chamber pressure indicating instrument
For the treatment of the outgoing air, a HEPA filter in combination with a condensation
system should be used.
The filter shall be built in a way that a disinfection of the filter shall be possible in a builtin
The filters must be heat resistant, steam resistant, hydrophobic and pressure resistant for
the pressure difference.
Cooling down phase after treatment should be existent; the temperature of the waste
should be not higher than 80°C after finishing the cooling down process.
The pressure vessel should be equipped with a heat insulation, the maximum outer
surface temperature should be < 50°C.
The manufacturer must provide a declaration that the pressure vessel is manufactured in
accordance with relevant guidelines for pressure equipment.
Following accompanying documents should be supplied with the treatment system and
shall be available at the Site:
Operation instructions (including process description).
Loading and maintenance procedures.
Short-form of operation and loading procedures.
P&I diagram, circuit plan, technical data sheet, pressure vessel certificate.