Ballast Water Sampling and Sample Analysis for Compliance Control - Global Maritime Transport and Ballast Water Management: Issues and Solutions - page 197

Fig. 9 Hand pump used for
ballast water sampling
Pumps
Hand Pump
This hand pump is light-weight and of compact design (ca. 30 cm long, diameter ca.
5 cm). The hand pump may be used, without priming with water, until a maximum
pumping head of ca. 9 m. The hose to be used on the suction side should have extra
supported hose walls to resist under pressure. To sample, the hose is lowered through
a manhole or sounding pipe to the desired water depth and the water is pumped up
into a bucket or directly through a fi ltering device (e.g., plankton net). A hand pump
example is given in Figs. 9 and 10 .
Air-Driven Well Pump
The air-driven well pump was especially designed to be used for ballast water sam-
pling via sounding pipes or manholes. It samples (a) at a desired water depth through
a sounding pipe or a manhole, (b) the water column and/or (c) ballast water and
related sediments at the tank bottom. The pump is operated by pressurized air as
supplied on a vessel (5-7 bars) to pump up water from the desired water depth. The
operation of the air-driven well pump is depth independent and it can be used to
pump up ballast water from greater depths, e.g., >30 m. The fl ow rate of this pump
is between 1.3 and 2.0 l/min. An example is given as Fig. 11 .