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Update on All India Joint Seminar of STAI & SISSTA on "Processing of Raw Sugar in Sulphitation Factories During Off-Campaign Period" On 17th April `10 at Hotel Chancery Pavilion, Bengaluru.
PROCESS TECHNOLOGY CHANGE OF NEED SUGAR INDUSTRY
Dr. G.S.C. Rao,
President
The Sugar Technologists’ Association of India
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Introduction
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The papers deals with cyclic nature of the Sugar Industry in India and contains very important datas about Indian Sugar balancing, production and consumption trends, management of surplus and deficit of Indian Sugar, prices v/s consumption, refined v/s Sulphitation Sugar, milling capacities and destination refinery- A necessity. |
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REFINERY TECHNOLOGY
A.K. Srivastava
Simbhaoli Sugars Ltd., Simbhaoli, Ghaziabad (U.P.)
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Introduction
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This paper contains Indian Sugar scenario, Raw- refining, Criteria of process selection refining, Raw Sugars quality parameter, various refining process and advantages of Raw refining over sulphitation. |
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STAND ALONE REFINERY- TECHNICAL CHALLENGES BEFORE INDIAN SUGAR INDUSTRY
E. Muthuvelappan & R. Babu
Shree Raghavendra Process Technology, Chennai
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Introduction
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The stand alone refinery is a new concept for Indian Sugar Industry. As of now two such refineries are established, one by Shree Renuka Sugars Ltd. At Haldia Port and another one by EID Parry (I) Ltd. at Kakinada Port. There are news that more such stand alone refineries are going to come up in various ports of our country. The stand alone refining is a different subject from the regular sugar production from sugar cane. The stand alone refineries need more attention in design stage itself, for operation with good efficiencies during all time without compromising the efficiencies and the capacity utilization of the plant. This article deals with the factors which are the to be considered during designing of the refinery to reduce the operation issues. |
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EXPERIENCE SHARING RAW SUGAR PROCESSING DURING OFF-SEASON IN EID PARRY UNITS
M. Murugesan, M. Balaji, bS. Raghunathan, V. Subburathinam,
K. Sukumar, A. Sivakumar
E.I.D. Parry (India) Ltd.
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Introduction
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In view of the recent situation in sugar production and the future prospects of growth of the industry it would be essential to produce white sugar row sugar to cater the needs of the country. The purpose of this paper is to share the experience of the production of white sugar from the raw sugar using the plantation white sugar machineries. The paper also describes the various processes adopted for the production of 50-60 IU of white sugar form raw sugar. |
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RAW SUGAR PROCESSING NEED OF THE HOUR
T.C.S. Reddy, GPSK Deekshitulu
GMR Industries Limited
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Presentation flow:
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Need of Refined Sugar
Indian Refined Sugar Industry
Specification
Process Flow
Economics
Difficulties and Remedies
Recommendation |
Need for Raw Sugar Processing
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It is necessary to improve the bottom line of sugar units/ complexes which are suffering due to the following:
Under utilization of plant capacities in sugar units due to reduces cane availability on account of
1. Increased cost of sugarcane cultivation
2. Non remunerative pricing
3. Decreased availability of harvesting labour
4. Competitive e pricing of other crops.
Non remunerative tariff from the respective State Power Corporations for the surplus power exported to the grid (for plants which have PPA).
Unable to reap benefits from molasses processing due to lack of Distillery facilities.
Regulations from the respective Governments.
Processing of Raw sugar in the Plant either during the crushing season or as a stand alone system after completion of the crushing season or both will help the unit to improve the bottom line to certain extent.
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RAW SUGAR PROCESSING IN SULPHITATION PLANT
Sunil Singhal (President), S. N. Saraswat (Vice President & Anup Kesarwani (Director)
Chemical Systems Technologies (I) Pvt. Ltd. M-58, Greater Kailash Part- II, New Delhi- 110048
Telephone: 011- 29216344, Fax: 011- 29216352 Email: chemsystems@sugarchem.com
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Abstract:
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NATURAL calamities such as cyclones, floods and drought create havoc in sugarcane production and can have dramatic effects on the supply of raw materials to the factory. Cane shortage during previous two seasons 2008-09 & 09-10, due to the drought like condition throughout the country caused a heavy deficit in the whit sugar availability. As there was not sufficient sugar to meet out the domestic demand, hence the import was essential to fulfill the requirements. The import of raw sugar will also enable the sugar factories to utilize their capacities which may otherwise remain idle because of sugar cane shortage.
To overcome sugar shortage Govt. of India had allowed duty free import of raw sugar and to produce white sugar, Government of India had simplified the import procedure time to time.
Raw sugar processing is a refining process but to process it in a Sulphitation factory it requires some additional machinery and processing skills producing white sugar from it.
Most of the sugar mills in India are based on double Sulphitation process which is not as similar to sugar refinery system: hence industry was looking for the arrangement in which the raw sugar can be processed within their system with ease.
An innovative process was developed with minor addition/ modifications in the existing system to produce white sugar from imported raw sugar to overcome the crisis.
Govt. of India has also offered soft loans to sugar industry through SDF to obtain the additional machinery so that they can prepare themselves to process imported raw sugar while producing white sugar.
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SIGNIFICANCE OF RAW SUGAR QUALITY IN ITS PROCESSING
Dr. (Mrs.)V. S. Keskar & Dr. S. S. Nimbalkar,
Maarc Labs Pvt. Ltd.
Nanded Phata Sinhagad Road,
Pune- 411 041
Email: maarc_lab@dataone.in, maarclab@vsnl.net
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Abstract:
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Raw sugar is moist coarsely crystalline mass with sucrose content of about 95-98%. The solid cores of raw sugar crystals are further covered with a layer of syrup. These covering substances make raw sugar moist & tacky giving it a typical yellowish brown colour and malty, burnt flavor.
Raw sugar is used to manufacture refined sugar and so its quality becomes a critical factor for its cost and performance of the refineries or further processing.
As per the present plan Indian sugar industry is importing raw sugar from various countries. When the source of raw sugar is widely varied its characteristic and quality also varies. It is therefore necessary to set quality standards for raw sugar so that consistent and acceptable quality of white sugar will be manufactured.
Transportation and storage conditions are vital factors for quality maintenance of raw sugar. Temperature, humidity/moisture, ventilation, biotic activity, gases, self heating/ spontaneous combustion, odor, contamination, mechanical influences, shrinkage/ shortage, insect infestation are the major risk factors associated during transportation/ storage of raw sugar.
Polarization, invert sugars, ash, moisture, grain size, colour, colour in crystals, indicator value, starch and dextran are the important quality parameters of raw sugar. Importance of these impurities, their limits and ICUMSA methods of analysis discussed in this article.
As per codex standard 212-1999 raw cane sugar is defined as partially purified sucrose which is crystallized from partially purified cane juice, without further purification, but which does not preclude centrifugation or drying and which is characterized by sucrose crystals covered with a film of cane molasses. Codex does not specify any quality requirement for war sugar except 20mg/kg (max) SO2 content and product free from heavy metals in amounts which may represent a hazard to human health. Bureau of Indian standards has defined raw sugar as ‘unwashed, centrifugal sugar with a minimum polarization of 96.50Z; surrounded by the original film of molasses; derived from sugarcane or sugar beet; to be further refined or reprocessed for making it direct consumption sugar. IS 5975 (2003) is also having specific requirements for raw sugar quality. (Table 1)
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I.
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Polarization, Min
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96.5º z
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II.
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Reducing sugars, percent by mass, Max
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1.0
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III.
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Sulphated ash, Min %
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0.8
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IV.
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Safety factor, Min
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0.3
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V.
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Crystal size material to be retained on 500 micron IS sieve, percent, Min.
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95.5
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VI.
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Sulphur dioxide, mg/kg, Max
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20
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At international level following physical & chemical characteristics of raw sugar are tested as per the intended use of raw sugar or refined sugar produced.
Some of the important parameters are as follows-
Polarization, Moisture, Safety factor, Total ash, Sulfate content, Polyvalent anions, Colour, Affinability, Filterability, Starch, Polysaccharicles (Other than starch), Insoluble foreign malter, Bacterial count, Trace elements, Insecticides & Herbicides, Silica, Floc forming constituents.
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