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Modern Rice Mill Plant / Parboiled Rice Mill / Converted Rice Mill Plant

Parboiled rice (also known as converted rice) is rice that has been partially boiled in the husk. The three basic steps of parboiling are soaking, steaming and drying. These steps also make rice easier to process by hand, boost its nutritional profile and change its texture. About 50% of the world’s paddy production is parboiled. The treatment is practiced in many parts of the world such as India, Bangladesh, Pakistan, Myanmar, Malaysia, Nepal, Sri Lanka, Guinea, South Africa, Italy, Spain, Nigeria, Senegal, Thailand, Switzerland, USA and France etc.

Advantages of Parboiled Rice

Compared with ordinary rice, parboiled rice has more nutrients. Research shows that there is a significant improvement in nutritive value, rice whitening/polishing quality, organoleptic quality and storage time of parboiled rice, with market price 10% -15% higher than that of the same level white rice.

1.Higher Nutritional Quality

In parboiling process, most water-soluble substances, such as Vitamins B and inorganic salts in cortex and embryo will penetrate into endosperm without water being lost in the process like the case with ordinary rice. Research has further depicted that 50% ~ 90% Vitamins B1 in embryo enters into endosperm, VB1, and VB5 content increases by nearly 2 to 3 times, while calcium, phosphorus and iron contents increase in varying degrees compared with ordinary rice.

2.Higher Processing Quality

Through parboiling treatment, rice husks become brittle, and easily husked/shelled, with improvement in rice structural mechanics. Thus, broken rice rate significantly decreases in milling process, milled rice rate increases and rice grains become more transparent and glossy after processing. Additionally, relevant tests and practices has shown that more parboiled rice (with the same precision) can be produced from indica rice and polished japonica rice compared with ordinary rice, approximately 25~35 kg and 15~25kg per ton respectively. In this regard, broken rice rate decreases 5%, head rice rate increases 10%, and oil extraction rate rises 3%~4% as rice bran is boiled.

3.Higher Cooking Quality

Parboiled rice has better expansibility compared with ordinary rice. Parboiled rice has 4% higher boiled rice rate. With heat treatment, part chains of starch will break and turn into dextrin. In parboiled rice, the content of dextrin is 1.80%~2.20%, five times higher than that in ordinary rice (4%). According to the digestion test on humans, the digestibility of protein in parboiled rice is 4.5% than that of regular rice. As a result, preboiled rice is particularly suitable for infants and young children, patients under rehabilitation and the elderly.

4.Prolonged Rice Storage Time

After parboiling treatment, microorganisms are killed, and enzyme activity is inhibited, which prevent the occurrence of predicaments in storage, like mildew. Moreover, endosperm starch dries after gelatinization, with higher hardness, solid moisture content, and higher resistance to pests. The storage time increase to 2~3 years.

Compare Nutritional Value of Parboiled Indica Rice & Ordinary Rice

Nutrition Facts Protein Carbohydrates Iron Phosphorus VA VB1 VB2
% % mg*(100g) mg*(100g) mg*(100g) mg*(100g) mg*(100g)
Parboiled Indica Rice 7.20 22.30 10.13 170.00 0.30 0.11 0.05
White rice 6.00 22.16 3.32 76.00 0.30 0.03 0.05

HTM offers a comprehensive portfolio of process engineered, high capacity, energy efficient modern rice mill machinery– from paddy intake to bagging and on-site services worldwide.
Including paddy intake, paddy cleaning, (paddy parboiling) paddy drying system, paddy storage, paddy/rice conveying, destoning, husking, paddy separating, whitening/polishing, grading, silky/mist polishing, rice cooling, color sorting, packaging/bagging etc.

From the initial design of the modern fully automatic parboiled rice mill to the final installation and commissioning, HTM maintains a close and frequent communication with its customers. It does not matter where the parboiled rice mill is located, whether the projects are new, state of the expansions or the modernization and automation of parboiled rice mill; customer satisfaction and high quality has always been pursued by HTM. From feasibility analysis to starting up the operation of the parboiled rice mills, HTM gets involved in every stage of the project.

HTM’s Turnkey solution covers the following stages:

Stage 1  Design of The Parboiled Rice Mill Project

At the design stage, HTM provides support and consultation services in the entire process, including the feasibility study, preliminary design, optimization design, and a detailed construction design. Based on the requirements of the customers and the local market, HTM offers customized solutions for the parboiled rice mills.

Stage 2  Implementation of The Parboiled Rice Mill Project

At the stage of parboiled rice project implementation, HTM will focus on parboiled rice mill project management, scheduling or customizing the parboiled rice mill machinery production, testing as well as the delivery of equipment. Throughout the process of parboiled rice project implementation, HTM's senior technical staff and engineers are responsible for project management, scheduling, logistics and the installation supervision of the entire parboiled rice milling project.

Stage 3 Debugging of The Biomass Parboiled Rice Milling Project

At the stage of debugging, HTM’s engineers will supervise parboiled rice production process and optimize process parameters, as well as train the local engineers in every step of the parboiled rice mill operation.

Stage 4 Service & Operation Support of Parboiled Rice Mill

The establishment of a complete industrial chain of rice production requires sufficient professional knowledge and skills. HTM will provide professional consultation services in the preliminary experiments, paddy cleaning, soaking, steaming/boiling, drying, storage, processing, bagging and the management of parboiled rice mill. HTM’s experienced team of experts can provide customers with long-term support for parboiled rice mill operations.
*HTM can also send experts to the rice mill for a long period. HTM’s professional technical experts can help customers operate the parboiled rice mills and swiftly recover the investment cost.

Value-added Services:

1.Provide a feasibility report of modern parboiled rice project
2.Offer investment advice and calculation of the return on investment
3.Assist financing services
4.Send HTM’s rice mill technical experts to help customers manage the parboiled rice factory.

HTM’s turnkey modern parboiled rice mill project can benefit users in the following ways:

1.Reduction of waste and resource duplication thereby saving investment
2.Integrated intelligent control
3.Less energy consumption and greater productivity
4.Rapid installation and starting-up, significantly reducing the construction period of the parboiled rice mill
5.Reduction of the risk of incorrect installation
6.Ensuring project quality
7.Reduction of the maintenance needs, hence user-friendly

HTM provides services ranging from outsourcing operations, the optimization to the spare parts of the parboiled rice mill. HTM has a strong technical strength, including preliminary experiments, paddy cleaning, steaming / boiling, drying (moisture control), parboiled rice processing, rice packing, palletizing and power plants using biomass/rice hulls as fuels. Automation solutions cover rice processing equipment to the entire turnkey automation project.

Types of Turnkey Parboiled Rice Mill Plant

Type Input Raw Paddy Capacity Output Rice Capacity Finished Rice Standards
DCT50-Z 3.0~4.0TPH 2.0~2.5TPH Grade B/A Silky, Sorted/Export Standard
DCT100-Z 6.0~8.0TPH 4.0~5.0TPH Grade A Silky,100% Sorted/Export Standard
DCT200-Z 12~14TPH 8~9TPH Grade A Silky,100% Sorted/Export Standard
DCT300-Z 18~21TPH 12~13TPH Grade A Silky,100% Sorted/Export Standard
DCT400-Z 24~28TPH 16~18TPH Grade A Silky,100% Sorted/Export Standard
DCT600-Z 36~42TPH 24~25TPH Grade A Silky,100% Sorted/Export Standard
DCT800-Z 50~56TPH 33~34TPH Grade A Silky,100% Sorted/Export Standard
DCT1000-Z 64~70TPH 41~42TPH Grade A Silky,100% Sorted/Export Standard
*TPH= MT per Hour

Parboiled Rice Process Flow Chart


1.Steel Workshop & Workshop Installation & Foundation Works & LED Lamps & Switch
2.DCT-P Series Rice Processing Plant & Installation
3.Paddy Storage & Wet Paddy & Husk Steel Silos & Installation
4.Parboiling System & Installation
5.Generator & Installation
6.Well Water Processing System & Installation.
7.Movable Conveyors, Diesel Generator Set of Plant, Truck Scale, Grain Scraper, Portable House, HD CCTV System for Factory
8.Round-trip tickets & accommodation(container houses) of all contractor's installation persons
9.Geological Prospecting Works
10.Plastic Bags & Woven Bags of Rice
11.All the Civil Works Tools & Project Tools.
12.Shipping of Rice Machinery & Tools

As an Owner of the par-boiled rice milling plant, you will consider the following questions:

1.My existing parboiled rice processing plant is too old, the machine performance is unstable, how to upgrade it?

2.My milled rice contained too many broken rice, how to reduce the broken rice ratio?

3.There are too many stones in my parboiled milled rice, How can I remove them?

4.The power supply of my parboiled rice plant is unstable,. The parboiled rice milling plant is driven by diesel electric power which costs me a lot of money every month. What should I do?

5.My parboiled rice processing plant costs too much electricity, What should I do?

6.The customers think my finished parboiled rice of low quality & with many impurities how to improve my parboiled rice’s quality?

As a New Investor in parboiled/steam/boiled rice milling plants, you will also take the following questions into account:

1.how to make parboiled/converted rice?

2.How can I establish/set up a  parboiled rice processing plant?

3.How much does it cost to invest in an modern automatic parboiled rice milling plant?

4.I want to establish an automatic parboiled rice milling plant and export my parboiled rice to other countries, how could I meet the export standard?

5.How to make profits from par-boiled rice milling business?

6.How much land does a steam rice mill plant occupy?

7.I want to establish a boiled processing plant, who could install and maintain this boiled rice mill project?

8.How long does it take to build a modern complete steam rice milling plant?

9.When can I make profits after the steam rice milling project is completed? How much profit does steam rice factory make per year? How long does it take to recoup my investment in steamed rice milling project?

In respect of all above mentioned questions, HTM will provide you with full detailed answers, which could cover the requirements, design, manufacturing, shipment, on-site installation, commissioning, training and operation. In a word, HTM can provide specified assistance and solutions for every customer. As for further questions, please contact HTM’s Parboiled Rice Machinery Experts.
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