Paper360 - January/February 2018 - 32

WASTEWATER TREATMENT
Degradation of 2,4-dichlorophenol by melamine
amine cellulose-immobilized lacasses
Zhen Wang, Pingping Bin, Ying Liu,
Yu Liu, Guihua Yang, and Lucian
SEM images of
(A) microcrystalline
cellulose and
(B) EDC-melamine
show that the surface
of cellulose changed
significantly before and
afer modification.

Effect of conductivity on dosage of alkyl ketene dimer (AKD).

This research reviews principles of conductivity; its measurement;
its effect on important aspects of papermaking operations, such as
retention, drainage, sizing, strength development, and deposit control;
and the fundamentals behind the effects of conductivity on the papermaking process. Specific mill examples are also provided. Potential
solutions for operating a mill under high and variable conductivity
conditions are discussed.
Understanding the principles of conductivity measurement and its
limitations can help mills interpret the effect of high ion concentration on the papermaking processes. It will also help papermakers gain
insight into issues associated with increased and changing conductivity
for troubleshooting.

32

Paper360º 1
896445_MAC.indd

JANUARY/FEBRUARY 2018

Epoxidized dialdehyde cellulose (EDC) was prepared and grafted
with melamine to obtain melamine grafted epoxidized dialdehyde
cellulose (EDC-melamine); the products were characterized by various
methods and were used as carriers to immobilize laccase.
Results show EDC-melamine can immobilize laccase effectively and
have higher enzymatic activity compared with EDC. Furthermore, the
enzymatic activity of EDC-melamine was found to be as high as 865
U*mg-1, compared with 140U*mg-1 for EDC. The removal efficiency
of 2,4-dichlorophenol (2,4-DCP) for EDC-melamine immobilized
laccase was about 71.5% at 40°C for 4 h at 10.0 mg*L-1 and dosage of
laccase = 0.2 g/L. The removal efficiency can remain greater than
63%, even after six cycles.
This topic provides a new method to immobilize laccases. The
product can be used to treat wastewater polluted by phenol and shows
excellent performance.

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Table of Contents for the Digital Edition of Paper360 - January/February 2018

Setpoint
Over the Wire
On the Journey to Injury-Free
2018 Outlook
Welcome to Scappoose
A Novel Synthetic Adsorbent for Pitch Control
TAPPI Journal Summaries
A New Resource for R&M Professionals
Reliability Interview: Steven Mjoen, Catalyst Paper
Leadership in Reliability & Maintenance
Global Trade and the Pulp and Paper Industry
TAPPI News
ASPI News
Advertisers’ Index
Paper360 - January/February 2018 - Intro
Paper360 - January/February 2018 - cover1
Paper360 - January/February 2018 - cover2
Paper360 - January/February 2018 - 3
Paper360 - January/February 2018 - 4
Paper360 - January/February 2018 - 5
Paper360 - January/February 2018 - Setpoint
Paper360 - January/February 2018 - 7
Paper360 - January/February 2018 - Over the Wire
Paper360 - January/February 2018 - 9
Paper360 - January/February 2018 - On the Journey to Injury-Free
Paper360 - January/February 2018 - 11
Paper360 - January/February 2018 - 12
Paper360 - January/February 2018 - 13
Paper360 - January/February 2018 - 2018 Outlook
Paper360 - January/February 2018 - 15
Paper360 - January/February 2018 - 16
Paper360 - January/February 2018 - 17
Paper360 - January/February 2018 - Welcome to Scappoose
Paper360 - January/February 2018 - 19
Paper360 - January/February 2018 - insert1
Paper360 - January/February 2018 - insert2
Paper360 - January/February 2018 - 20
Paper360 - January/February 2018 - 21
Paper360 - January/February 2018 - 22
Paper360 - January/February 2018 - 23
Paper360 - January/February 2018 - 24
Paper360 - January/February 2018 - 25
Paper360 - January/February 2018 - A Novel Synthetic Adsorbent for Pitch Control
Paper360 - January/February 2018 - 27
Paper360 - January/February 2018 - 28
Paper360 - January/February 2018 - 29
Paper360 - January/February 2018 - TAPPI Journal Summaries
Paper360 - January/February 2018 - 31
Paper360 - January/February 2018 - 32
Paper360 - January/February 2018 - Reliability Interview: Steven Mjoen, Catalyst Paper
Paper360 - January/February 2018 - Leadership in Reliability & Maintenance
Paper360 - January/February 2018 - insert3
Paper360 - January/February 2018 - insert4
Paper360 - January/February 2018 - 35
Paper360 - January/February 2018 - 36
Paper360 - January/February 2018 - Global Trade and the Pulp and Paper Industry
Paper360 - January/February 2018 - 38
Paper360 - January/February 2018 - 39
Paper360 - January/February 2018 - 40
Paper360 - January/February 2018 - 41
Paper360 - January/February 2018 - 42
Paper360 - January/February 2018 - TAPPI News
Paper360 - January/February 2018 - 44
Paper360 - January/February 2018 - ASPI News
Paper360 - January/February 2018 - Advertisers’ Index
Paper360 - January/February 2018 - cover3
Paper360 - January/February 2018 - cover4
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