Improving the Capacity of the Holding Company for Water and Waste Water (HCWW) - Ministry of Housing, Utilities and Urban Development, Egypt (EuropeAid/129937/D/SER/EG) Holding Company Capacity Improvement (PAO-SAAP / European Union) C HCI Dr.Helalley Abdelhady Helalley Holding Company Capacity Improvement (HCCI)
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Sludge treatment through composting prior to reuse – the alexandria experience
All system problems guiding us towards searching for a sustainable and safe sludge treatment and disposal system. By the middle of 1995, we started pilot composing trials in order to reach to the feasible and comfortable operation and maintenance condition which guarantee success when scaling up full composting operation. Finally site 9N composting operation is a key for producing high quality compost in a safe and cost effective manner
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Improving the Capacity of the Holding Company for Water and Waste Water (HCWW) - Ministry of Housing, Utilities and Urban Development,
Egypt
(EuropeAid/129937/D/SER/EG)
Holding Company Capacity Improvement (PAO-SAAP / European Union)
C HCI
Dr.Helalley Abdelhady Helalley Holding Company Capacity Improvement (HCCI)
Project Location
3
Scum/Screenings Leachate Evaporation Ponds
Storage Area for Spoil Material
Dedicated
Land
Disposal
(DLD)
Area
Compost Area
Fuel Station Guard House
Administration Building Vehicle Wash
Sludge and Grit Receiving Area Sludge Wash Area
Dedicated Land Disposal (DLD) Area
Spoil Material
Storage
Area Scum/Screenings
Trenches
Grit treatment
Area
Emergency
Composting Area
Sludge composted at site 9 is mechanically dewatered sludge from the East and West treatment plants and some other smaller treatment facilities. Total quantity processed on average: 2000 m3/d
6
Sludge mechanical dewatering
through belt presses
7
Receiving area : sludge unloading into spreaders
Sludge spreading on the soil
surface in a layer of 65 mm
thickness.
sludge application rate:
10-30 kg/m2
Mixing
sludge with
soil
Previous sludge disposal system Dedicated Land Disposal (DLD)
Disking operation
Mixing
sludge
with soil
Land disposal had some environmental nuisances
associated such as unpleasant odors and the attraction of
flies. The neighbors near site 9 complained about it. Also
there was the potential for serious groundwater contamination.
We began looking at other sludge treatment and disposal
options. In 1995, we started pilot composting trials in order
to determine optimal operating conditions in a large scale