Building a culture with
sustainable practices at its heart is the key for future success.
Faced with massive sludge accumulation, unpleasant odors, and the
inefficiency of existing sludge treatment system, Water General
Directorate at Al-Madinah Al-Munawarah has entrusted K&A to develop
a viable action plan that puts Al-Madinah Al-Munawara on the green
track of sustainability.
To put an end to the long lasting problems generated by the current
sludge treatment system, K&A launched a strategic green design for a
Sludge Solar Drying System at Al-Madinah Al-Munawarah Sewage
Treatment Plant. This is the first step in Al-Madinah Al-Munawarah
becoming an eco-friendly green city capable of sustaining its water,
solid and liquid wastes, and energy resources for future demand.
“Cities across the globe are now faced with the challenge of
changing their operational practices to become more sustainable. It
is time to think of sludge as a resource to be valued rather than
waste to be disposed off” says Dr.Kahil, Project’s Manager. The
negative impacts revealed while examining Al-Madinah Al-Munawarah
existing sludge drying system such as improper environmental
planning of lagoons, high volume of sludge accumulation sites, and
the socio economic problems imposed around the area has inspired K&A
to prepare a sustainable, automated, and reliable system that will
span into the future at its core. This includes managing the
accumulated sludge in lagoons as the well as the discharges of the
under construction and future extension of the existing Sewage
A full system has been conceived and developed by K&A that features
clean and renewable energy by turning current sludge into bio-solids
which will be bagged and used in industrial and agricultural fields.
“It is time to think of sludge as a resource to be valued rather
than waste to be disposed off” Dr. Maher Kahil – Senior Manager –
The system is based on the principles of exchanging heat and energy
in green house transparent buildings until sludge is stabilized and
had become fully compatible with EPA environmental provisions and
laws. This is achieved through a long process including raising
solid contents using gravity thickeners and sludge centrifuges
dewatering machines, rotating scrappers to turn and ensure uniform
drying of sludge, and finally monitoring the interior and exterior
air environments using recycling fans to reach maximum operating
conditions. The result? No more unpleasant odor, less maintenance,
higher loading efficiency in terms of sludge quantity, “Class B”
quality, and most importantly a green clean view. This is all highly
environmentally and economically significant as the system will be
able to treat an impressive 100,000 ton/year of sludge.
Finally the dream of having a greener Madinah is becoming a reality.
The proposed sludge solar treatment system will cost $40 million and
will reach completion at the beginning of 2017. When it is finished,
Al-Madinah Al-Munawarah is set to inspire KSA’s next big green