Straw and Husk Bedding Processing Plant for Farm Bedding in Bangladesh

RICHI MACHINERY

Why Bangladesh?

Bangladesh is a logical location for a straw and husk bedding project because rice dominates the crop base and livestock and poultry production create recurring demand for dry litter and resting materials. The Ministry of Agriculture reports 39.1 million tonnes of rice production for 2022–23, while the Department of Livestock Services continues to publish a national livestock-economy series covering the country’s cattle and poultry sectors. For this project, those agricultural systems matter more than unsupported claims about a fixed national bedding-pellet market size.

Gazipur also gives the client access to Dhaka-area poultry, dairy and cattle operations while remaining close to crop-growing districts and rice-milling supply chains. Rice straw is bulky and expensive to haul over long distances, so the procurement radius is managed by baling, supplier scheduling and decentralized farm storage rather than trying to stock several months of loose straw at the factory.

Buyer Group	Bedding Requirement	Plant Response
Commercial dairy farms	Dry resting surface, manageable litter and easier storage	Straw-dominant pellets with controlled friability
Broiler / breeder farms	Low loose dust and consistent spreading	Screened straw/husk pellets with fines removal
Cattle fattening farms	Compact material for pens and seasonal wet conditions	Rice-straw and wheat-straw bedding grades
Distributors / farm-supply dealers	Bagged material with repeatable size and batch identity	25 kg, 50 kg and FIBC packing options

Loose straw and raw husk remain lower-cost bedding options, so pellet bedding is not positioned as a universal replacement. Its commercial value is strongest where farms pay for compact storage, easier handling, reduced loose dust, faster clean-out or more consistent litter management.

No fixed statement is made that imported pellets cost a certain percentage more, that farmers face a specific field-burning fine, or that one producer controls the national market. Those claims depend on current contracts, enforcement and regional prices.

RICHI MACHINERY

Raw Materials: Rice Straw and Rice Husk

The plant uses four agricultural-residue streams, with rice straw remaining the main feedstock. The purchasing plan is sized from finished output and moisture balance rather than simply adding nominal annual quantities.

Raw Material	Annual Purchasing Plan	Typical Receiving Moisture	Preparation Route
Rice straw	Approx. 31,000 T/A	About 14–20% when baled and stored correctly	Bale breaking, cutting, drying if required, fine grinding
Rice husk	Approx. 6,000 T/A	Often about 9–13% under covered mill storage	Screening; usually bypasses coarse cutting and often bypasses drying
Wheat straw	Approx. 10,000 T/A	About 14–20%	Bale breaking, cutting, drying if required, fine grinding
Corn stalks	Approx. 2,000 T/A	Can reach 18–25% or more	Coarse cutting, drying, fine grinding
Gross annual input	Approx. 49,000 T/A	Blend-dependent	Supports about 45,000 T/A finished bedding pellets

The mass balance allows for moisture removed during conditioning and drying, screen rejects, handling loss and fines recycle. Rice husk contributes useful structure but also raises mineral and silica content, so its proportion is adjusted by bedding grade instead of forcing one fixed formula across every customer.

A 1,000–2,000 m² concrete drying/pre-conditioning yard is useful during dry weather, but it cannot dry the entire daily feed requirement of a 45,000 T/A plant. Supplier-side drying, covered bale storage and a mechanical drying route are therefore part of the operating plan.

• Bales are accepted only when free of visible mold, excessive soil and mixed municipal waste.
• Rice husk is screened for stones, sand and metal before entering the process.
• Wet-season deliveries are sampled by lot; material above the direct-processing moisture limit is diverted to drying.
• Crop residues are purchased from multiple farms, balers and rice mills so the plant is not dependent on one harvest window.
• Covered FIFO storage is used because humid straw can heat, mold and lose bedding quality.

RICHI MACHINERY

The Site and Building 

A 45,000 T/A bedding plant needs more space than the initial 800 m² equipment hall and 500 m² raw-material warehouse. Straw is low-density even when baled, so the final layout uses an approximately 9,000 m² site and relies on short on-site inventory plus contracted supplier storage rather than attempting to hold several months of feedstock inside one warehouse.

Facility	Approx. Area	Use
Production building	1,200 m²	Bale opening, grinding, pelletizing, cooling, screening and bagging
Covered raw-material warehouse	2,500 m²	Baled straw, dry husk and short-term production buffer
Finished-goods warehouse	1,000 m²	Bagged and FIBC bedding pellets
Drying / pre-conditioning yard	2,000 m²	Dry-weather conditioning and temporary wet-residue handling
Office / QC / electrical / maintenance	300 m²	Administration, sampling, transformer and spares
Roads, unloading and fire access	Balance of site	Truck circulation, loading and safety separation

The 8 m production-building height is workable because the process is arranged horizontally with selected bucket elevators and conveyors rather than a tall gravity tower. The layout reserves maintenance access around the three pellet mills, cooler, hammer mills and dust filters.

Because Bangladesh has a humid monsoon climate, the raw-material warehouse uses raised floors or moisture barriers, roof drainage and controlled wall openings. Finished pellets are kept physically separate from incoming wet straw so they do not regain moisture before dispatch.

RICHI MACHINERY

Equipment Configuration

The biomass pellet production line is designed for a 7.5–9 T/H installed pelletizing rate. Three parallel MZLH678 units match the authoritative biomass-machine range and provide more realistic annual-capacity closure than a nominal 6 T/H arrangement.

Process Stage	Main Equipment	Qty / Rating	Purpose
Bale receiving	Bale breaker / straw cutter	1 set, 8–10 T/H class	Opens bales and cuts long straw before milling
Coarse / fine grinding	Hammer mills	2 × 75–90 kW class	Controls fiber length and final particle size
Moisture control	Low-temperature dryer + hot-air system	1 bypassable set	Handles wet straw and stalks during humid periods
Metal / stone protection	Magnets + screens	Multiple points	Protects mills and reduces contamination
Pelletizing	biomass pellet mill / MZLH678	3 × 200 kW; 2.5–3 T/H each	Produces bedding pellets
Material-specific pellet reference	rice husk pellet machine application route	Integrated in biomass line	Rice husk enters the same biomass pelletizing system after preparation
Straw application reference	straw pellet machine application route	Integrated in biomass line	Straw-dominant bedding grades
Cooling	Counterflow pellet cooler	1 × 8–10 T/H class	Reduces pellet temperature before storage
Screening / recycle	Pellet screener + fines return	1 set	Removes loose fines and recycles clean material
Dust control	Bag filters / aspiration	Multiple collection points	Grinding, transfer, screening and packing
Packing	Automatic bagging + FIBC option	1 set	25 kg, 50 kg and bulk-bag dispatch

The fixed RICHI machinery package is USD 395,000. That scope includes the core preparation line, three MZLH678 pellet mills, cooling, screening, conveying, dust collection, packing, controls and the moisture-management route. The total completed-project investment is USD 620,000 after site adaptation, electrical works, buildings, utilities, inland logistics and commissioning are included.

A single 15 kW bag-filter fan serving every dusty point is not assumed to be sufficient. Air volume is calculated from hood capture velocity, duct length and simultaneous operating points, with separate branches and isolation dampers used where needed.

RICHI MACHINERY

Process Flow

The process changes with raw-material form. Baled straw and corn stalks require opening and cutting; rice husk does not. Dry husk can also bypass the dryer, while wet straw is conditioned before final grinding and pelletizing.

Step 0: Moisture Classification and Pre-Drying

Incoming bales and husk are checked by lot. Dry material enters covered storage. Borderline-moisture straw can use the concrete yard during suitable weather, while wetter material is routed to the mechanical dryer. This prevents the factory from depending on sunshine during the monsoon.

Step 1: Bale Opening and Coarse Cutting

Rice and wheat straw bales are opened mechanically before long fibers reach the hammer mills. Corn stalks receive coarse size reduction as required. Rice husk bypasses this stage.

Step 2: Drying When Required

Wet crop residues are dried to a practical pelletizing range, generally around 10–14% depending on the blend. The dryer is bypassed for rice husk and sufficiently dry straw. Heat demand therefore changes with season rather than remaining constant all year.

Step 3: Fine Grinding

Two hammer mills reduce prepared straw and stalk material to a consistent few-millimeter particle size. Screen selection is based on fiber behavior and target bedding quality; it is not fixed at one 6 mm value for every crop residue.

Step 4: Blending and Buffering

Ground straw, rice husk and other approved residues are buffered before pelleting. Blend ratios are adjusted to control bulk density, ash, friability and farm handling. Rice husk is not automatically included at the same percentage in every product.

Step 5: Pelletizing

Prepared material is distributed to three ring die pellet machine units in the MZLH678 biomass configuration. Typical bedding diameter is 6–8 mm, while die compression, roller setting and moisture are tuned during commissioning to obtain pellets strong enough for transport but able to break down and absorb moisture in use.

Step 6: Mechanical Cooling

Fresh pellets leave the ring dies hot and relatively soft. A counterflow cooler reduces their temperature close to ambient before screening. Small discharge fans alone are not treated as a complete cooling system for a line producing more than six tons per hour.

Step 7: Screening and Fines Return

The cooled product passes through a pellet screen. Loose fines and clean broken pellets return to the production loop under controlled conditions. This lowers packaged dust without promising an unverified universal dust percentage.

Step 8: Packing and Dispatch

Finished bedding is packed in 25 kg or 50 kg bags for dealers and farms, with FIBC or bulk dispatch available for large users. Batch identification records the production date, blend and relevant quality checks.

RICHI MACHINERY

Utilities and Consumption

Utility demand is driven mainly by three 200 kW pellet mills, two hammer mills, the dryer fans, cooler, conveyors and dust collection. The earlier tables gave two incompatible annual electricity totals and understated the pellet-mill load.

Utility	Planning Range	Engineering Basis
Electricity	Approx. 3.2–4.0 million kWh/year	About 70–90 kWh per ton of finished bedding, depending on drying and grinding duty
Electrical service	Approx. 1,250–1,600 kVA	Allows simultaneous operation of pelletizing, grinding and auxiliaries
Dryer fuel	Approx. 700–1,200 T/A clean husk/straw equivalent	Varies with wet-season evaporation load and furnace efficiency
Process water	Minimal	Dry biomass route; water is not a normal process ingredient
Domestic / cleaning water	Approx. 1,000–1,400 m³/year	About 20–24 staff plus housekeeping
Fire-water reserve	Separate engineered storage	Sized to local fire-protection design rather than annual consumption

The plant runs about 20 hours per day in two production shifts, leaving a daily window for cleaning, lubrication, die inspection and planned maintenance. Three hundred fifty operating days is an intensive schedule, so wear-part stock and preventive maintenance are built into the operating plan.

A small 100 kVA generator cannot operate three MZLH678 pellet mills. Backup power, if provided, is either sized for a defined reduced-production load or limited to controls, lighting, dust extraction needed for safe shutdown and selected conveyors.

RICHI MACHINERY

How RICHI Customized This Line for Bedding Pellets

The design focuses on the behavior of straw and husk as bedding rather than copying a fuel-pellet line. The customer needs pellets that survive transport and bagging but break down readily enough in the poultry house or livestock pen to create a dry, fibrous bedding layer.

1. Three MZLH678 pellet mills provide 7.5–9 T/H installed capacity so the 45,000 T/A target can be reached without operating continuously at the nameplate limit.
2. A bale breaker and two-stage size-reduction logic prevent long straw from entering the fine-grinding section in uncontrolled bundles.
3. The drying route is bypassable: dry rice husk and properly stored straw avoid unnecessary heat, while monsoon-affected material can still be processed.
4. Die and roller settings are commissioned around controlled friability rather than a fixed fuel-pellet compression ratio.
5. A counterflow cooler and pellet screen replace short conveyor-only cooling and remove loose fines before packing.
6. The dust-control layout separates high-load grinding points from transfer and bagging extraction so one small fan does not serve the whole plant.

The operating team is approximately 20–24 people across two shifts, including receiving, line operation, bagging, warehouse, maintenance, quality checks and supervision. Training covers bale handling, moisture decisions, hammer-mill screens, pellet-mill die and roller service, cooler operation, dust housekeeping, lockout and basic product checks.

Because rice husk and different straws do not behave identically, commissioning includes trial blends rather than one fixed recipe. The customer can produce rice-straw-dominant bedding, straw/husk blends and selected wheat-straw or corn-stalk grades without assuming that every material gives the same absorbency or pellet strength.

RICHI MACHINERY

Product Specifications (Bedding Pellets)

There is no single universal Bangladesh bedding-pellet specification that makes one set of density, PDI, absorbency and dust numbers mandatory for all farms. The project therefore uses practical production targets and customer testing rather than unsupported guaranteed figures.

Property	Practical Project Target	Control Logic
Diameter	6–8 mm	Selected for farm spreading and handling
Length	Typically 10–25 mm	Limited to reduce bridging and improve distribution
Finished moisture	About 8–12%	Checked before bagging and warehouse release
Friability / durability	Controlled, not maximized	Must survive logistics but break down during bedding use
Loose fines	Kept low by cooling and screening	Measured by agreed sampling method
Ash / mineral content	Blend-dependent	Rice husk and soil contamination can raise ash substantially
Absorbency	Verified by agreed test method	Depends on straw type, pellet structure and moisture
Bulk density	Measured for each commercial grade	Used for bag, warehouse and truck planning

Rice-husk-rich bedding is not presented as chemically identical to straw bedding. Husks can increase silica and mineral content, while straw species and harvest conditions affect wax, fiber and water uptake. Farms should test litter behavior under their own ventilation, stocking density and manure-management system.

For poultry customers, low loose dust and dry storage are important, but the page does not claim that pellets automatically prevent respiratory disease or cut mortality by a fixed percentage. For dairy and cattle users, dry resting conditions and regular litter management remain necessary even when pellet bedding is used.

Selling price is kept outside the technical specification because Bangladesh residue, electricity, bag and transport costs move with season and region. The completed-project investment is fixed; finished-product pricing is set from current farm contracts.

RICHI MACHINERY

Market Outlook for Straw Bedding Pellets in Bangladesh

The market case comes from the intersection of a very large rice economy and commercial livestock production. Bangladesh’s Ministry of Agriculture reports 39.1 million tonnes of rice output in 2022–23, and the Department of Livestock Services continues to publish national livestock-economy data. Those sectors create substantial flows of straw and husk and a broad base of farms that use bedding or litter materials.

Pellet bedding will compete with loose straw, rice husk, sawdust and other locally available materials. It is therefore most attractive where the customer values compact storage, mechanized handling, consistent bagged supply or a cleaner screened product rather than simply the lowest cost per ton.

Commercial Challenge	Plant Response
Monsoon moisture	Mechanical drying plus dry-material bypass and covered storage
Bulky seasonal straw supply	Baling, multiple suppliers and decentralized stock instead of oversized factory inventory
Rice husk raises mineral content	Control blend ratio and sell against farm-use requirements
Power reliability	Defined backup loads and safe shutdown plan
Farmers unfamiliar with pellet bedding	Trial deliveries and on-farm spreading tests
Variable crop residue quality	Receiving inspection, moisture sampling and supplier grading

The project does not rely on a claim that field burning is universally fined at a fixed amount, that only a handful of competitors exist, or that one 45,000 T/A plant is automatically the country’s largest. Those points need market-specific evidence before they are used in sales material.

For future expansion, the first questions are raw-material contracts, wet-season dryer load and warehouse turnover. Adding another pellet mill without expanding those upstream sections would not automatically increase reliable annual output.

RICHI MACHINERY

Why a Straw and Husk Bedding Plant Makes Sense in Bangladesh

The project makes commercial sense when the customer can secure baled straw and rice-husk residues within an economical collection radius and sell a differentiated bedding product to farms that value storage efficiency, handling and screened low-fines material. Bangladesh’s rice economy makes that raw-material strategy credible, but procurement still has to be organized village by village and mill by mill.

The 7.5–9 T/H configuration also suits the 45,000 T/A target better than a nominal 6 T/H line. It provides enough margin for mixed straw behavior, die changes and planned maintenance while keeping the plant within one main production train.

Imported RICHI equipment can move from Qingdao to Chattogram, Bangladesh’s principal seaport, and then travel inland by road toward Dhaka and Gazipur. Inland transport planning must account for container release, road congestion, heavy equipment dimensions and final site access rather than relying on a fixed port-to-site delivery time.

RICHI scope covers process engineering, equipment manufacture, factory inspection, export packing, controls, installation guidance, commissioning and operator training. A practical implementation period for a project of this scale is about 6–8 months when building work, transformer installation, drying utilities and equipment manufacture proceed in parallel.

For another straw or husk bedding project, RICHI Machinery would first confirm monthly residue volume, bale size, wet-season moisture, rice-husk share, desired bedding behavior, operating hours, power supply, warehouse turnover and bag format. Those inputs determine whether the line needs thermal drying, how many grinding stages are required and which MZLH configuration fits the annual target.