Ackumen™ MCA-i™ The safer, smarter monochloramine offering - Paper Technology International 2023 Buckman - Paper Technology International 2023 - Flipbook - Page 48

Ackumen™ MCA-i™ The safer, smarter monochloramine offering - Paper Technology International 2023 Buckman

PAPERTECHNOLOGYINTERNATIONAL Ackumen™ MCA-i™ The safer, smarter monochloramine offering - Paper Technology International 2023 Buckman
Case History
MCA-i technology has allowed for significant performance
increases. Recently, MCA-i was benchmarked against Buckman’s
previous generation MCA equipment on a paper machine in North
America.
Phase 1 - Trial
Phase 1 of this evaluation was to compare the performance
of MCA-i with the older generator, a Gen 4. In order to accomplish
this, application points and dosing strategies were not changed
during this phase. A primary goal was to maintain a similar MCA
residual at the headbox while maintaining KPIs such as machine
runnability. Manual testing included both total chlorine and MCA
residuals and adenosine triphosphate (ATP) analysis to measure
microbial contamination. Data collected via digital platforms
(Buckman OnSite® for the Gen 4 and AckumenTM for MCA-i)
included application flow rates, pump flow rates from water, MCAP
and sodium hypochlorite, and pH. The hypochlorite concentration
was also monitored by the MCA-i unit.
Results of Phase 1 are shown in Figures 1-2 and
summarized in Table 1. With MCA-i, slightly higher headbox
MCA residuals (13.3%) were easily maintained (Figure 1) while
a reduction in both the MCAP (12.0%) and sodium hypochlorite
(14.7%) chemical usages was achieved (Figure 2). With regards
to controlling microbial activity, headbox ATP remained well below
the customer’s upper limit of 500 relative light units (rlu) (Figure 3).
The outliers (above 100 rlu) occurred after an unscheduled down
and correlate to lower headbox MCA residuals (Figure 1) during the
same time period.
Figure 1: Phase 1 Trial Evaluation of Headbox MCA Residual. When
comparing the performance of MCA-i with the Gen 4, slightly higher
MCA residuals (13.3%) were achieved.
Table 1. Summary of key findings from Phase 1 Trial Evaluation
Gen 4
MCA-i
Difference % Change
Headbox MCA Residual (ppm)
1.5
1.7
0.20
13.3
MCAP Flow Rate, LPH
13.3
11.7
-1.6
-12.0
Sodium Hypochlorite Flow Rate, LPH
33.4
28.5
-4.9
-14.7
Figure 2: Phase 1 Trial Evaluation of MCAP and Sodium Hypochlorite Dosage Rates. For the MCA-i trial, both chemical flow rates
were reduced while maintaining a slightly higher headbox MCA residual (Figure 1) as compared with the Gen 4.
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