15-20T/H Organic Waste Granule and Powder Fertilizer Plant in Indonesia

What They Had: Raw Materials with Real-World Variability

The client’s supply chain was already in place, which was a huge advantage. They had agreements with poultry farms, rice mills, and mushroom growers across the region. But the consistency of those materials varied widely, and that had to be built into the process design from day one.

Poultry manure from small farms came in at around 70% moisture, often mixed with rice hulls. Corn stalks and rice straw were drier but required size reduction before they could be blended effectively. Mushroom growing substrate—spent compost—had a different texture and nutrient profile altogether.

The client also had access to slaughterhouse bone meal and mineral-based materials like humic soil from local suppliers. The trick was designing a process that could take all of this and produce a uniform output, whether the final product was powder or granules.

Here’s what the annual feedstock breakdown looked like after we helped them quantify their supply contracts:

One of the first things we discussed was the variability in manure quality. The client had been using a simple windrow method for their small-scale operation, and they’d noticed that batches from different farms produced different results. We explained that at 15–20 tons per hour, you can’t afford to guess.

We recommended they set up a simple testing protocol at receiving—moisture content and basic N-P-K spot checks—so they could adjust the blending ratios before material ever entered the main processing line. That became part of the final design.

Facility Layout: Making 20,000 m² Work for a Multi-Product Line

The site was a former industrial warehouse complex, and the client had already leased four main buildings. Our job was to figure out how to fit a complete processing operation—receiving, fermentation, granulation, drying, cooling, screening, and packaging—into the existing structures without major new construction.

After walking the site (virtually, initially, then with our local partner), we settled on a layout that used the buildings for distinct functions:

• 17# Building (Fermentation & Storage): The 1,980 m² ground floor became the dedicated fermentation area with forced aeration floor and windrow turner. Upper floor stored incoming raw materials and partially processed material. Isolating fermentation helped contain odors and allowed a dedicated exhaust treatment system.
• 15# Building (Multi-Product Line): Heart of the operation. Ground floor housed the main line for powder and granulated products (80,000 tons/year bio-organic fertilizer + 10,000 tons microbial compound). Upper floor was for liquid fertilizer production (5,000 tons/year) and additional raw material storage.
• 12# Building (Blended Fertilizer Line): Dedicated line for 5,000 tons/year of NPK-blended granules using fermented material from building 17 as base. Upper floor stored chemical additives separately.
• 10# Building (Finished Product Warehouse): Both floors used exclusively for finished product storage (~4,000 m² total), with racking system and good ventilation to handle seasonal inventory.

One layout detail that made a difference: we positioned the liquid fertilizer production upstairs in building 15, directly above the granulation line. That allowed them to gravity-feed liquid additives into the mixing stages below, reducing pump requirements and simplifying maintenance.

Process Design: Why Powder and Granules Need Different Approaches

The client had seen other facilities try to run both powder and granulated products on the same equipment, and they’d seen the compromises—either the powder line was underutilized or the granules were inconsistent. We approached it differently: a shared front end (fermentation and initial processing) with dedicated lines for each product type after that point.

Fermentation Stage (Building 17)

Raw materials were weighed and mixed according to daily moisture and nutrient tests. The blend was loaded into fermentation channels—about 15 to 20 days in the primary phase, with turning every two days. Temperature monitoring was manual at first (they wanted to keep initial costs down), but we installed probes so they could add automated monitoring later.

The forced aeration floor maintained oxygen levels and controlled odor. During fermentation, moisture dropped from 70% to about 50%, ideal for moving to the next stage.

Powder Fertilizer Production

For powder products, fermented material went directly to crushing and screening. Because moisture was still relatively high (30–40% after final processing), dust generation was minimal. Process steps were straightforward:

• Crushing to break clumps
• Fine screening to remove oversize (returned to fermentation as bulking agent)
• Packaging directly for powder bio-organic fertilizer line

About 80,000 tons per year of baseline powder product was the anchor output.

Granulated Fertilizer Production (Main Line in Building 15)

For granules, we installed a separate line that started with the same fermented material but added macro and micro elements for custom blends. The process was more complex:

1. Mixing: Fermented material plus additives blended in a double-shaft mixer machine.
2. Granulation: Ring die fertilizer granulator machine for high throughput and consistent spherical granules; water added at controlled rate (approx 0.08 m³ per ton of product).
3. Two-stage drying: First dryer removed surface moisture; second brought internal moisture down to about 20%. Coal-fired hot air furnaces with cyclone separators for dust control.
4. Cooling: Ambient air cooling to stabilize granules before screening.
5. Screening: Rotary screener separated finished granules from oversize (crushed and returned) and fines (returned to mixer).
6. Coating: Coating drum applied polymer-based layer to prevent breakage during transport.
7. Final blending (for microbial products): Liquid microbial inoculants sprayed onto cooled granules in a separate mixing stage.
8. Packaging: Automated bagging with palletizer.

Two-stage drying gave finer control over temperature and moisture, reducing risk of burning organic matter or creating hard clumps.

Liquid Fertilizer (Upper Floor, Building 15)

A simpler line but required clean conditions. Heated water mixed with adjuvants and macro/micro elements in stainless steel tanks, then cooled and packaged. Main challenge was dust control during powder additive handling—we specified a dedicated dust collection hood at the mixing station.

Equipment: What We Supplied and Why

The client’s budget was around $1.6 million USD for equipment, which was realistic for this scale. We sourced about 70% from our facility, with the rest (motors, some conveyors) sourced locally to reduce lead times and simplify maintenance.

Fermentation Area (Building 17)

Powder Fertilizer Line (Building 15)

Granule Fertilizer Line (Building 15)

Compound Fertilizer Line (Building 12)

Liquid Fertilizer Line (Building 15, Upper Floor)

Dust & Odor Control

The client initially questioned the need for three separate exhaust systems. We explained that each organic fertilizer production line had different emission profiles—fermentation building was primarily odor (ammonia, hydrogen sulfide), while granule lines had more particulate matter from drying and screening. Separating them allowed optimized treatment efficiency and lower operating costs.

Working Within Indonesian Regulations

Indonesia has its own standards for organic fertilizers, and we made sure the client understood what they needed to meet before equipment selection. Key references: SNI 7763:2018 for solid organic fertilizers and SNI 02-2801-1998 for compound fertilizers. These set limits on heavy metals (arsenic, cadmium, mercury, lead), pathogen counts, and minimum organic matter content.

The client’s biggest concern was heavy metal compliance, particularly from manure sources. We advised them to continue sourcing manure from farms that didn’t use high-metal feed additives, and built enough flexibility into blending to dilute any incoming material that tested high.

Odor control was another major consideration. The facility was located near a residential area on the edge of the industrial park, and the local government had made it clear that odor complaints would shut them down fast.

That’s why we specified negative pressure ventilation in the fermentation building and installed a UV + scrubber system rather than just a bio-filter. UV treatment breaks down complex odor molecules more effectively, especially for high-ammonia loads from poultry manure.

Economics: What the Investment Looked Like

The client’s total project cost was around $2.8 million USD, broken down roughly as:

• Equipment (supplied by RICHI): $1.6 million
• Site preparation & building modifications: $400,000
• Permitting & consulting: $150,000
• Working capital (first 6 months): $650,000

Feedstock was effectively free—they were charging tipping fees to farms that previously paid for disposal. Main operating costs included labor (25 people, 24-hour operation, 240 days/year), electricity (~$4,000/month), coal (~$2,500/month for dryers), maintenance (~$3,000/month), and microbial inoculant/additives tied to production volume.

Projected production costs: $45–55 per ton of finished product. Market prices for granulated organic fertilizer in Indonesia ranged $120–180 per ton, with premium microbial blends fetching $200+. At 100,000 tons annual capacity, payback looked like 2.5 to 3 years.

Handling Moisture: The Real Operational Challenge

Water management was critical. The facility’s water use came from three main sources: process water for granulation (about 1,200 m³/year, incorporated into product), liquid fertilizer production (about 3,500 m³/year, also incorporated), scrubber makeup water (about 48 m³/year, blowdown applied to fermentation piles), and domestic water for staff (about 144 m³/year, treated and used for landscape irrigation). No process water was discharged—everything either went into product or was absorbed into fermentation.

To prevent leachate, we designed the fermentation floor with a slight slope and drainage channels. Policy: if incoming material was too wet, they’d increase the proportion of dry crop residues in the blend until moisture was below 60%, keeping a buffer stock of dry material at all times.

Lessons from Commissioning

Installation took about four months, with our team spending the last six weeks on-site for commissioning and training. A few things came up that weren’t in the original plan:

• Power fluctuations: The local grid was less stable than assumed. We added soft starters to larger motors (dryer fans, granulator) to prevent nuisance tripping.
• Screening efficiency: The first rotary screen for the granule line was undersized for peak throughput. Swapped for a larger unit during commissioning.
• Operator learning curve: The fermentation team was used to managing piles by feel, not moisture meter. We spent extra time teaching them to trust the numbers—the aeration system worked better when they followed the schedule.

The client’s project manager later told me the biggest surprise was how quickly the powder line hit full capacity—within two months they were running 15–18 tons per hour consistently. The granule line took longer (about four months) to dial in drying and coating parameters, but once dialed, they hit 20 tons per hour with no trouble.

Why This Model Works in Indonesia

Indonesia has a waste problem and a soil problem. Millions of tons of agricultural residue, livestock manure, and food processing waste are underutilized, while decades of intensive chemical fertilizer use have degraded organic matter across much of Java and Sumatra. Government programs push for a return to organic matter, but the supply chain isn’t mature yet.

A facility like this—a 15–20 t/h organic waste granule and powder fertilizer plant in Indonesia—sits right in that gap. It takes waste that would otherwise be burned or dumped and turns it into something farmers actually want to buy. Powder works for large plantations with existing spreaders. Granules appeal to smaller farmers needing concentrated, easy-to-handle material. Liquid opens up high-value horticulture markets.

The client’s long-term plan is to replicate this model in other provinces. They’ve already had inquiries from cooperatives in Central Java and Lampung. Economics work because raw materials are cheap and demand is growing. The main barrier has always been capital—equipment cost and the expertise to design a system that actually works with local materials.

That’s where we came in. We’ve done enough of these projects now to know what questions to ask upfront. Not just “what’s your throughput?” but “how does your manure change between wet and dry season?” and “who’s going to operate the dryer controls at 2 AM?” Those answers determine whether a line runs smoothly or becomes a maintenance headache.

Moving Forward

If you’re looking at a similar project—whether in Indonesia or elsewhere in Southeast Asia—the starting point is always the same. Get your feedstock sorted first. Know what you have, how much of it, and how consistent it is. Then think about your market. Powder is cheaper to produce but sells for less. Granules cost more but command a premium. Liquid is the highest margin but most demanding in quality control.

From there, it’s about finding a partner who’s done this before. We’ve shipped equipment to Indonesia for years—everything goes from Qingdao to Tanjung Perak Port in Surabaya, about a 12-day sea transit. We’ve learned which equipment holds up in tropical conditions, how to design layouts that fit existing industrial buildings, and how to avoid the common mistakes.

The client we worked with on this project is now in their second year of operation. They’ve expanded raw material sourcing, added a second coating line, and are talking about exporting granulated product to Malaysia. They started with a vision of turning waste into something useful.

With the right process, that vision became a profitable business. If that sounds like where you want to be, let’s talk. We’ve got the engineering experience, the equipment, and the logistics network to make it happen.