Sludge Removal & Disposal

ALPHA provides sludge cleaning services for lakes and lagoons using specialized hydraulic dredgers

The Problem

The accumulation of sludge is a common feature of all man‐made lakes and reservoirs. In the Middle East, lakes located in residential areas often serve as temporary storage reservoirs for storm‐water runoff, and gradually accumulate debris over time. Dust storms are another contributing factor to the accumulation of sediments in lakes as is the settlement of dead algae and other organisms. No matter the type of pond or lake, it will, at some point, develop a layer of sludge on the bottom. If the sludge becomes too thick, dissolved oxygen levels are rapidly depleted leading to the production of odorous and toxic compounds like hydrogen sulfide (H2S), methane (CH4) that can result in the death of aquatic life. The accumulation of sludge in irrigation water lakes can reduce the storage capacity of the reservoir leading to water shortages in the hotter months when irrigation demand increases. The decomposition sludge under anoxic conditions also releases many nutrients that contribute to the proliferation of filamentous algae and cyanobacteria. Sludge accumulation also provides a suitable habitat for midge reproduction, leading to pest issues in parks and community areas.

Diagram showing the cycle in which bottom sludge releases nutrients into the water leading to formation of more algae that in turn dies and settles down to add to the sludge volume. The continuous repetition of this cycle leads to the formation of very thick sludge and algae‐polluted lakes.

The Solution

Periodic removal of sludge is important for the health of all artificial lakes and ponds. Our skilled and experienced team can carry out sludge profiling at no cost, to identify the quantity of sludge in a given lake and provide advice on options for removal or elimination of that sludge. Our unique and specialized system of dredging can be applied to lakes of all sizes including those with waterproof lining with no risk of liner damage, and without the need to drain and dry the lake basin. ALPHA Environmental Solutions has pioneered in the field of dredging sludge from plastic‐lined lakes using specialized compact dredgers designed for use in lakes with plastic lining. In addition to the physical removal of sludge, we also organize all laboratory toxicological testing and Municipality permits needed for the disposal of sludge to landfill.

Videos for lakes that we have cleaned the sludge from, showing the sludge that is being pumped out from the lake bottom as slurry, and one of the sludge bags during the sludge dewatering process which contains the sludge inside and release clean water back to the lake.

Sludge being cleaned from the bottom of the
lake using our specialized hydraulic dredger
Sludge being pumped out of the
lake using one of our dredgers
Sludge Removal & Disposal

One of our specialized hydraulic dredgers operating at a lake in Dubai, UAE (left). The sludge is being pumped as slurry and is fed into specialized sludge bags for filtration (right)

Specialized bags being filled with sludge that is cleaned and pumped from the lake bottom as slurry. The bags contain the sludge inside and drain clean water back to the lake.

The sludge bags are left to dry and then we dispose to municipality landfill.

We inspect the sludge thickness at the bottom to locate problem areas and type of sludge present before cleaning.

We inspect the sludge thickness at the bottom before and after sludge cleaning to measure efficiency and as a Key Performance Indicator (KPI).

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