Figure 1: Water movement and composition of a peristaltic pump Collecting water samples is a key component to the HMGA Water Project as it provides data necessary to compare treatment processes. Samples are taken before anything was added as well as after the installation of new treatment technologies. By comparing the results, the efficiency of the new technology was determined.
Auto-samplers were introduced during the project in order to collect samples throughout a given production day. They are used to collect samples at various times without the user needing to be present. Grab samples were collected along with composite samples to provide a clear image of a day’s worth of washing.
HMGA Water Project & Auto-Samplers
The project utilized two types of auto-samplers: the Hach Sigma 900 and the MasterFlex E/C Composite Sampler. These two auto-samplers were utilized due to their ease of use and reliability. Both types of auto-samplers use peristaltic pumps to pull the water from the collection point through the hose to the bottle. All samples collected using the auto-samplers are composite samples; composite samples are a multitude of single samples combined. The composite samples were compared to results from manual grab samples.
The auto-samplers were set at varying intervals based on requirements of the day. On regular sampling days, the auto-samplers were set to take samples every half hour for twelve hours. Alternatively, the auto-samplers were set to draw a sample every ten minutes for three hours during the project’s intensive sampling days.
Peristaltic pumps
As discussed previously, the auto-samplers use peristaltic pumps to draw the water up the hose or tube. The pump works by pinching a flexible tube around rotors which rotate creating a suction on the water. As shown in Figure 1, the rotors move in a counter-clockwise rotation, creating suction, thus pulling the water up the tube.
Conclusion
The use of auto-samplers was integral to the success of the HMGA Water Project. They offer a user-friendly method to take samples that can be used in a variety of situations.
Auto-samplers were introduced during the project in order to collect samples throughout a given production day. They are used to collect samples at various times without the user needing to be present. Grab samples were collected along with composite samples to provide a clear image of a day’s worth of washing.
HMGA Water Project & Auto-Samplers
The project utilized two types of auto-samplers: the Hach Sigma 900 and the MasterFlex E/C Composite Sampler. These two auto-samplers were utilized due to their ease of use and reliability. Both types of auto-samplers use peristaltic pumps to pull the water from the collection point through the hose to the bottle. All samples collected using the auto-samplers are composite samples; composite samples are a multitude of single samples combined. The composite samples were compared to results from manual grab samples.
The auto-samplers were set at varying intervals based on requirements of the day. On regular sampling days, the auto-samplers were set to take samples every half hour for twelve hours. Alternatively, the auto-samplers were set to draw a sample every ten minutes for three hours during the project’s intensive sampling days.
Peristaltic pumps
As discussed previously, the auto-samplers use peristaltic pumps to draw the water up the hose or tube. The pump works by pinching a flexible tube around rotors which rotate creating a suction on the water. As shown in Figure 1, the rotors move in a counter-clockwise rotation, creating suction, thus pulling the water up the tube.
Conclusion
The use of auto-samplers was integral to the success of the HMGA Water Project. They offer a user-friendly method to take samples that can be used in a variety of situations.
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