HANSA 10-2017

Schiffstechnik | Ship Technology
only a few large pieces of engine room machinery
to have been supplied to a ship as an
›onboard build‹ and we believe this could be
the way forward for all sorts of machinery
space equipment, especially where space is
limited or timeframes are tight.
Delivering machinery flat-packed,
ready for construction and welding in-situ
saves a considerable amount of time
during the planning and installation stages.
We are also able to keep costs down to
a minimum as there is no need to cut large
holes into the vessel’s structure and patch
them up again. Beavis believes it will even
be possible to supply, install and commission
systems while the vessel is still operational,
although this will be dependent
on a number of factors and will have to be
considered on a project-by-project basis.
Grease, often overlooked
However a ship’s wastewater treatment
unit is supplied, whether it’s for a retrofit
or newbuild installation, there is an important
part of the treatment process that
is often overlooked: grease.
Grease is a huge problem and usually
dealt with by way of a grease trap. Yet,
while these systems are reasonably effective
if regularly cleaned, the reality is that
congealed fat quickly accumulates, clogging
up and damaging pipework and, ultimately,
the wastewater treatment plant.
Black water (sewage) discharge is heavily
regulated, of course, but waste streams
from galleys, showers and laundries (grey
water), are not. There are no internationally
mandated rules, only local/national discharge
requirements for a stream that contains
a mixture of galley grease, oils and
fats, biological pollutants, such as urine
and blood, nano-plastics from shampoos
and soaps, along with an increasingly wider
range of other unpleasant substances.
»This is the most diffcult wastewater
stream to treat,« says Beavis. Effective separation
has to be carried out before it can
be properly treated. If it remains untreated
and grease enters the wastewater treatment
system, it not only dramatically increases
the biological load placed on the system
but can reduce treatment effciency to levels
that are incompatible with wastewater
discharge regulations. Wastewater treatment
systems can be rendered inoperable.«
Grease can also result in rapid corrosion
of holding tanks and treatment systems
as fat deposits quickly break down
the protective internal coating used in
some older systems. And once the coating
fails, corrosion is rapid.
The Clarimar MF
ACO Marine has now begun marketing
its next-generation Lipator and Liptomat
grease separators, following the successful
development of a new pneumatic automated
discharge valve and the standardisation
and in-house manufacture of key
component parts. The range of treatment
capacities has been increased with new
stainless-steel Lipator and Liptomat units
capable of treating between 1 and 25l per
second. Composite units are available capable
of the same treatment capacities.
»Based on market demand and feedback
from our customers, we have been
able to modify our established Lipator
and Lipatomat products by bringing production
completely in-house, reducing
and standardising components and installing
a new pneumatic valve to enhance
operational performance,« says Beavis.
»The combination of increased capacity
range and material choice means that
reliable grease separation is now available
for all vessel types and all budgets, facilitating
the treatment of galley wastewater
and the protection of downstream wastewater
treatment plants. The remodelled
systems allow the commercial shipping
sector to treat galley waste fats, oils and
greases more effciently for a similar cost
to that of a traditional grease trap system
and up to 50% less than existing grease
separation systems.«.
ED
August Storm 1/4 hoch in
Instandhaltung aller Schiffshaupt -
und Hilfsdiesel-Motoren bis 7.000 kW
Motoren- und Ersatzteile im Tausch
Service für Abgasturbolader
und Einspritzpumpen
Mechanische Bearbeitung
und Fertigung
August Storm GmbH & Co. KG · August-Storm-Straße 6 · 48480 Spelle
Fon +49 5977 73-0 · Fax +49 5977 73-138
info@a-storm.com · www.a-storm.com
HANSA International Maritime Journal – 154. Jahrgang – 2017 – Nr. 10 67