Past Workshops - Period 2005 - 2007

ISSCT PROCESSING WORKSHOP

Baton Rouge, Louisiana, USA 29 May to 1 June, 2006

"Cane Juice Purification Processes"

 Host
 Programme
 Abstracts
 Report

PROGRAMME
TOPIC: "Cane Juice Purification Processes"

The workshop covered various aspects of cane sugar processing from raw juice through evaporator supply. These comprised all approaches to juice purification and recent developments in juice handling and treatment, including new separation techniques aimed at producing different grades of sugar.

Sub topics:
  • Juice handling – screening of juice, flow measurement and control, enzyme treatments.
  • Juice heating and liming – different types of heater, direct contact heating, hot vs. cold liming, saccharate vs. milk of lime, control of lime addition, pH control.
  • Clarification – Chemistry of clarification, types of clarifier, CFD studies, juice color, effect of cane quality, soda ash dosing to reduce evaporator scaling, control of mud consistency, flocculant chemistry and characteristics.
  • Rotary vacuum filtration – optimization of filter operation, filter design, filter retention, mud handling, microbiological losses, mud disposal.
  • Other approaches to mud filtration – horizontal belt filters, decanter centrifuges, pressure filtration.
  • Sulfitation – SO2 production, SO2 absorption, optimization of color removal.
  • Filtrate clarification – flotation clarification, quality of filtrate, sucrose losses.
  • Membrane filtration – microfiltration, ultra- and nano-filtration, optimization of membrane plant and equipment, power requirements, treatment of retentate, impurity removal.
  • Ion exchange treatment of juice – softening juices, de-ashing, regeneration.
  • Decolorization of juice – nature of colorants, formation of color pre-cursors, sulfitation, carbon treatment, ion exchange decolorization, simulated moving bed equipment.
  • Treatment for direct consumption sugar – blanco directo, mill white sugar, direct refined sugar production, organic sugar.
Details of Programme and Communications:

PROGRAMME
SUNDAY 28 MAY, 2006
15:00 - 17:00 REGISTRATION
17:00 - 19:00 Welcome Cocktails
MONDAY 29 MAY, 2006
08:00 - 09:00 REGISTRATION
09:00 - 09:50 Welcome/Introduction
Welcome - Dr D Boethel, Vice Chancellor, LSU AgCenter
Welcome – F.A. Martin, President ASSCT (La Division)
Introduction – J. Simon, GM American Sugar Cane League 
Session 1: Juice Handling - Chairperson: V. Sens
10:10 - 12:00 Chairpersons Introduction. V.Sens, Belgium
Reliability in the Determination of the Content of Insoluble Solids in Mixed Juice. R. Arteaga, F. Morales and C. Martínez, Colombia
Bagacillo Removal by the Use of a Vibroscreen to Improve Quality and Color of Sugar. K. Jain, Abdul Alim and V. M. Kulkarni. India
Solid/liquid separation with a Putsch Membrane Filter Press and a Sibomat Screen Filter. D. Mergner and L. Briones, USA/Germany
Cane Juice Screening Trials and Use at The Andhra Sugars Ltd. Mullapudi Narendranath, India.
Rotary Juice Screen, Subodh V. Joshi, India.
Effect of return of cush cush on extraction. P Schorn, South Africa.
The Use of Enzymes in Juice and Syrup Processing. D.F. Day, USA
The Use of a-Amylase to Control Starch Levels in South African Cane Sugar Factories. B.M. Schoonees, South Africa
Session 2:  Heating and Liming – Chairperson: M.A. Godshall
13:00 - 15:00 Chairpersons Introduction. M.A. Godshall, USA
Juice Heating within the Cane Juice Purification Process. J.R. Braasch, P.C. Toebe, C. Starzinski, Germany/USA
Saccharate Liming at Felixton. S  Jaganath and W  Dlamini, South Africa
Lime Saccharate Trials and Use at The Andhra Sugars Ltd. Mullapudi Narendranath, India.
Milk of lime vs. saccharate liming. K.T.K.F. Kong Win Chang and A.F. Lau Ah Wing, Mauritius.
Differences in the Factory Performance of Cold, Intermediate, and Hot Lime Clarification Processes in Raw Sugar Manufacture. G. Eggleston and A. Monge, USA.
16:00 - 18:30 Swamp Tour
TUESDAY MAY 30, 2006
Session 3: Clarification - Chairman: R. Steindl
08:00 - 09:00 Chairpersons Introduction. R Steindl, Australia
Studies on the Action of Polyaluminum Coagulants - M. A. Godshall, M. McKee, R. Triche and S. Moore, USA
Mud Transport in SRI Clarifiers. R.J. Steindl, Australia
Mud Thickening in SRI Clarifiers. R.J. Steindl, Australia
Application of Computational Fluid Dynamics in the Study of Sugarcane Juice Clarifiers - L.F. Echeverri and P.W. Rein, USA
The Short Retention Clarifier, Subodh V. Joshi, India
Session 3:  Clarification - continued
10:10 - 12:00 Replacement of Lime with Soda Ash in Cane Juice Clarification. M. Saska, USA
Effect of Clean Cane on Juice, Syrup and Sugar Color at The Andhra Sugars Ltd. Mullapudi Narendranath, India.
The Use of Capillary Viscometry to Measure the Concentrations of Flocculant. G R E Lionnet and M Pillay, South Africa
Control of Color and Removal of Impurities by Polymeric Clarification Technology. M.K.Srivastava and P.P.Chaturvedi, India
Session 4: Rotary vacuum filters - Chairman P. Schorn
12:00 - 14:50 Chairpersons Introduction. P Schorn, South Africa.
Filter design details. Jord, (R.Steindl) Australia
Use of Flocculants and Bagacillo in Conditioning of Clarifier Mud. M. Saska, USA
Mud Processing Options. R.J. Steindl, Australia
Session 4:  Rotary vacuum filters –continued
15:10 - 17:00 Microbiological Losses on Mud Handling. D.F. Day, USA
Mud Recycling to Diffusers. N  Rajoo, South Africa
Filtrate Flotation Clarification. L. Bento, J. Cuddihy and W. Simoneaux, USA
Filtrate Clarification at The Andhra Sugars Ltd. Mullapudi Narendranath, India
Filtrate clarification by a mud settling process, Subodh V. Joshi, India.
WEDNESDAY MAY 31, 2006
08:00 - 16:30 Visit Raceland and Cora Texas sugar mills and
Audubon Sugar Institute, Saint Gabriel
THURSDAY JUNE 1, 2006
Session 5: Other purification techniques - Chairman: M. Saska
08:00 - 09:50 Chairpersons Introduction. M Saska, USA
The Effects of Iron and pH on the Color of Clarified Sugarcane Juice. L.R Madsen, USA
Separation of sugar colorants for further identification and quantification in sugar processing. Luis Bento, USA.
Cane Juice Sulfitation at The Andhra Sugars Ltd. Mullapudi Narendranath, India
Session 5: Other purification techniques – continued
10:10 - 12:00 Some hard lessons with membrane filtration.  S.J. Clarke, USA
Evaluation of a magnetic ion exchange (MIEX®) resin for application within sugar factory processes. M. O’Shea, S. Staunton, K. Selby, T. Dahlke and M. Carr, Australia.
Options, benefits and constraints of the application of ion exchange systems, especially softening. S.J. Clarke, USA.
Session 6: Direct consumption sugar production - Chairman: S. Clarke
13:00 - 14:50 Chairpersons Introduction, S Clarke, USA
Bleaching of Sugar with Hydrogen Peroxide. M. Saska, USA
The Application of WSM Technology to produce Direct White Sugar from Raw Cane Juice at Felixton Mill in South Africa. C.R.C. Jensen, S.M. Kitching, S.F. Rosettenstein, F.E. Ahmed. South Africa
Direct Production of White Sugar. P.W. Rein, L. Bento, USA
Session 6: Direct consumption sugar production – continued
15:10 - 16:00 Plantation White Sugar Production in Brazil. D. Tostes Oliveira, Brazil
The Dedini and SAT processes for direct white sugar manufacture. M. Saska, USA
Organic cane sugar. S.J. Clarke, USA
A New Strategy for Sugar in Mauritius. Dr Kassiap Deepchand, Mauritius.
ISSCT 2007 presentation. P Schorn, South Africa
16:00 - 17:00 Summary – V. Sens, ISSCT Factory Section Chairperson
Process Section Meeting
19:00 WORKSHOP DINNER- LSU Faculty Club