Streaming Current Based Microtubular Enzymatic Sensor for Self-Powered Detection of Urea

Longteng Yu; Chen Shi; Wang Xi; Joo Chuan Yeo; Ren Hao Soon; Zhengkun Chen; Peiyi Song; Chwee Teck Lim

doi:10.1002/admt.201800430

How to use alum with cationic dispersed rosin size

TAPPI Journal ◽

10.32964/tj15.5.331 ◽

2016 ◽

Vol 15 (5) ◽

pp. 331-335 ◽

Cited By ~ 3

Author(s):

LEBO XU ◽

JEREMY MYERS ◽

PETER HART

Keyword(s):

Zeta Potential ◽

Colloidal Particles ◽

Streaming Potential ◽

Excessive Amount ◽

Paper Machine ◽

Optimum Amount ◽

Potential Measurement ◽

Streaming Current ◽

Wide Range ◽

Laboratory Results

Retention of cationic dispersed rosin size was studied via turbidity measurements on stock filtrate with different alum and dispersed rosin size dosages. Stock charge characteristics were analyzed using both an analysis of charge demand determined via a streaming current detector and an evaluation of zeta potential of the fibers by streaming potential measurement. The results indicated that an optimum amount of alum existed such that good sizing retention was maintained throughout a wide range of dispersed rosin size dosages. However, when an excessive amount of alum was used and fines and colloidal particles were transitioned from anionic to cationic, the cationic size retention was reduced. Laboratory results were confirmed with a paper machine trial. All data suggested that a stock charge study was necessary to identify optimal alum dosage for a cationic dispersed rosin sizing program.

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Self-powered ultraviolet–visible–near infrared perovskite/silicon hybrid photodetectors based on a novel Si/SnO2/MAPbI3/MoO3 heterostructure

Applied Physics Express ◽

10.35848/1882-0786/abc5fa ◽

2020 ◽

Vol 13 (12) ◽

pp. 121001

Author(s):

Wei Qu ◽

Shukun Weng ◽

Liping Zhang ◽

Min Sun ◽

Bo Liu ◽

...

Keyword(s):

Near Infrared ◽

Self Powered

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Development of a Self-Powered Food Sanitation Center

10.21236/ada408938 ◽

2002 ◽

Author(s):

Brady Krass ◽

Charles Hannon ◽

Joseph Gerstmann

Keyword(s):

Self Powered ◽

Food Sanitation

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Piezoelectric Nanogenerators for Self-Powered Nanosystems and Nanosensors

10.21236/ada587995 ◽

2013 ◽

Author(s):

Zhong L. Wang

Keyword(s):

Self Powered ◽

Piezoelectric Nanogenerators

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Theoretical Principles of Streaming Current Detection

Water Science & Technology ◽

10.2166/wst.1989.0247 ◽

1989 ◽

Vol 21 (6-7) ◽

pp. 443-453 ◽

Cited By ~ 17

Author(s):

S. K. Dentel ◽

K. M. Kingery

Keyword(s):

Velocity Profile ◽

Electrophoretic Mobility ◽

Double Layer ◽

Initial Attempt ◽

Streaming Current ◽

Coagulant Dosage ◽

Model Predictions ◽

Double Layer Model ◽

Simplifying Assumptions ◽

Current Detection

In spite of the increased use of streaming current detectors (SCDs) as a means of monitoring and/or controlling coagulant dosage, knowledge regarding fundamental workings is incomplete. This paper provides an initial attempt at predicting and verifying functioning compared to electrophoretic mobility. The instrument's components -- the sensor and the signal processor -- are first described. Equations modelling electro-double layer behavior in its sensor are then developed. Simplifying assumptions include the use of a capacitance model of the double layer and a triangular velocity profile for fluid within the sensor's annulus. More complex modelling approaches are also suggested which incorporate the Gouy-Chapman electro-double layer model and an exact solution for the velocity profile. Experimental results confirm predictions of the simplified model under conditions of low potential. A monotonic relationship exists between streaming current electrophoretic mobility, which is required for its use as a control parameter. Deviations from model predictions are suggested to be due to charge characteristics of the sensor surfaces themselves.

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Development of New Polymer Dosage Control Method for Sludge Dewatering Process

Water Science & Technology ◽

10.2166/wst.1993.0666 ◽

1993 ◽

Vol 28 (11-12) ◽

pp. 263-272 ◽

Cited By ~ 4

Author(s):

Chiaki Igarashi ◽

Kazunari Tanaka ◽

Teruaki Kitamura ◽

Kazuo Fujita ◽

Kazuaki Arai ◽

...

Keyword(s):

Control Method ◽

Sludge Dewatering ◽

Proportional Control ◽

Sludge Characteristics ◽

Streaming Current

In a sludge dewatering process using polymer, controlling the polymer dosage is an important factor for upgrading performance and achieving a saving on costs. A new automatic polymer dosage control method has been developed by the authors, which features the use of a streaming current detector or a colloid titrator. These detectors detect the colloidal charge of the filtrate from sludge. The said method was used with actual dehydrators and the following advantages were confirmed.(1) The said method is applicable for various types of dehydrators.(2) The said method is effective even when there are changes in sludge characteristics.(3) The said method is more economical than a conventional solids proportional control method in that less polymer is used.

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Fuzzy control of coagulation reaction through streaming current monitoring

Water Science & Technology ◽

10.2166/wst.1997.0102 ◽

1997 ◽

Vol 36 (4) ◽

pp. 127-134 ◽

Cited By ~ 2

Author(s):

J. C. Liu ◽

M. D. Wu

Keyword(s):

Fuzzy Logic Controller ◽

Treatment Plant ◽

Control Process ◽

Water Treatment Plant ◽

Critical Parameters ◽

Flow Mode ◽

Raw Water ◽

Streaming Current ◽

On Line ◽

Current Monitoring

A fuzzy logic controller (FLC) incorporating the streaming current detector (SDC) was utilized in the automatic control of the coagulation reaction. Kaolinite was used to prepare synthetic raw water, and ferric chloride was used as the coagulant. The control set point was decided at a streaming current (SC) of −0.05 and pH of 8.0 from jar tests, zeta potential and streaming current measurements. A bench-scale water treatment plant with rapid mix, flocculation, and sedimentation units, operated in a continuous-flow mode, was utilized to simulate the reaction. Two critical parameters affecting the coagulation reaction, i.e., pH and streaming current, were chosen as process outputs; while coagulant dose and base dose were chosen as control process inputs. They were on-line monitored and transduced through a FLC. With raw water of initial turbidity of 110 NTU, residual turbidity of lower than 10 NTU before filtration was obtained. Results show that this combination functions satisfactorily for coagulation control.

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