Anaerobic Digester Cleaning Plant
Grit is a major problem within anaerobic digestion. This type of
material can include eggshells, bone, lime, ash, glass and various
other inert high-density materials which settle in the digester
tank, reducing the capacity in the tank and therefore decreasing
its efficiency. Not only that, but grit is highly abrasive and
causes attrition and wear on downstream processes. This results in
the need for regular maintenance and replacement of parts.
Solution
Digester tanks require regular cleaning to increase the retention
time of bio-solids in the tank as well as reduce the costs of
heating it. Removing grit increases digestion and the life of the
sludge pumps and other parts. Hengyang's mobile, in-line grit
removal technology allows for grit to be removed from the anaerobic
digestion processes, without the need to shut digester tanks down.
The HENGYANG uses vibrating platform screen technology in a mobile
screening & classification system to efficiently remove grit, rag
and other troublesome solids from a waste stream.
The HENGYANG can be easily moved around a number of sites if
required, facilitating processing in-situ at a variety of
locations. This minimises the transport movements required to bring
waste material to a processing site.
The HENGYANG mobile solution can be used to screen and dewater
material from other tanks including:
sludge holding tanks
primary tanks
storm detention tanks
pumping stations and culverts
Result
Our solution makes tank cleaning more efficient and more
cost-effective for operators as they're able to recover more grit
without needing to shut the digester tanks off
Maximum dewatering ensures the rag material going to landfill is
now drier and easier to manage. The HENGYANG recovers up to 90% of
grit can be used in a number of further applications:
nutrient rich soil or composting additive
backfill and pipe bedding
generation of biosolids
