SRF Dryer Manufacturer in New Zealand
See how we dry SRFLooking for SRF dryers manufacturers in New Zealand? STRONGA builds FlowDrya lines to order at its Hertfordshire works and supplies them to New Zealand — see the regulatory and economic context below.
FlowDrya SRF dryers are manufactured to order at STRONGA's Hertfordshire works and supplied to New Zealand operators upgrading sorted commercial and industrial residues into a solid recovered fuel, though no FlowDrya SRF line is yet commissioned locally. SRF differs from a rough RDF in that it is specified: to be sold as SRF a fuel must be classified against the international standard on calorific value, chlorine and moisture. Drying is the step that makes that classification achievable and repeatable, pulling a wet, mixed feedstock down to a low, even moisture so the fuel meets a stated grade a cement or lime kiln can accept in place of coal.
Supplying New Zealand
We supply New Zealand from our Hertfordshire works — we have no documented SRF installation in New Zealand yet.
Regulatory context
Disposal is priced through the waste disposal levy set under the Waste Minimisation Act 2008 and administered by the Ministry for the Environment; the levy on municipal (class 1) landfill is NZD 65 per tonne from 1 July 2025, rising to NZD 70 per tonne on 1 July 2026 and NZD 75 per tonne on 1 July 2027, and has been expanded across more landfill classes — the principal lever pushing wet residues toward recovery, drying and reuse rather than burial.
Source: https://environment.govt.nz/what-government-is-doing/areas-of-work/waste/waste-disposal-levy/expansion/ · checked 2026-08
Carbon is priced through the New Zealand Emissions Trading Scheme (NZ ETS), the country's main tool for cutting emissions; a plant that burns coal or natural gas must surrender New Zealand Units for its combustion emissions, so displacing that fossil fuel with a dried, waste-derived or biomass fuel directly reduces the unit liability. The 2026 auction reserve price floor is NZD 71 per unit.
Source: https://icapcarbonaction.com/en/ets/new-zealand-emissions-trading-scheme · checked 2026-08
Biosolids applied to land are governed by the beneficial reuse of biosolids standard administered by the Water Services Authority (Taumata Arowai) under the Water Services (Wastewater Environmental Performance Standards) Regulations 2025; a product is graded by stabilisation (Grade A or B, on pathogen reduction) and by contaminant concentration, with only the top stabilisation-and-contaminant grade allowed as a permitted activity without a resource consent — and thermal treatment and drying support that higher stabilisation grade.
Source: https://www.taumataarowai.govt.nz/wastewater-sector/wastewater-standards/beneficial-reuse-of-biosolids-standard · checked 2026-08
Waste-derived and biomass solid fuels are characterised against the European ISO standards that New Zealand laboratories and buyers use in the absence of a bespoke national fuel specification — EN ISO 21640 for solid recovered fuel classification, the EN ISO 17225 series for solid biofuels, and EN ISO 18134 for moisture determination — so a dried fuel can be sold on a documented calorific value and moisture grade.
Source: https://www.iso.org/standard/71309.html · checked 2026-08
Applicable standards: EN ISO 21640, EN ISO 17225-4, EN ISO 18134, NZS 4454, NZ Biosolids Guidelines.
Economic context
The rising waste disposal levy makes burial expensive: at NZD 65 per tonne for class 1 landfill in 2025 and scheduled to reach NZD 70 per tonne in 2026 and NZD 75 per tonne in 2027 (before gate and transport charges), every tonne of water or inert residue kept out of landfill by drying is a direct and growing saving.
Source: https://environment.govt.nz/what-government-is-doing/areas-of-work/waste/waste-disposal-levy/expansion/ · checked 2026-08
Carbon carries a real cost: New Zealand Units traded on the secondary market around NZD 55.04, against a 2026 auction reserve price floor of NZD 71 (International Carbon Action Partnership), so each tonne of coal or gas that a dried alternative fuel displaces avoids both the fuel bill and an ETS unit liability.
Source: https://icapcarbonaction.com/en/ets/new-zealand-emissions-trading-scheme · checked 2026-08
Bought-in energy is dear and getting dearer: industrial electricity and natural-gas prices rose sharply in the year to March 2025 as domestic gas supply tightened (MBIE New Zealand Energy Quarterly), which favours drying systems built around recovered kiln, boiler or process heat rather than grid electricity or bought-in gas.
Worked illustration (assumptions stated):
Two prices drive the case. Disposal keeps rising: the class 1 waste levy is NZD 65 per tonne in 2025 and is legislated to reach NZD 70 in 2026 and NZD 75 in 2027, so routing combustible residue into a graded fuel avoids that cost. Carbon adds to it: with New Zealand Units near NZD 55.04 and a 2026 auction floor of NZD 71, each tonne of coal an SRF displaces spares a kiln both the fuel and the ETS unit. Drying on recovered process heat keeps the upgrade cheap. A predictable fuel also earns a firmer price, because buyers reward reliability and penalise variability. Steady output likewise smooths a kiln's combustion and reduces unplanned downtime. Assumptions: gate fees, offtake and carbon exposure vary by site.
Figures are indicative and were last reviewed August 2026; energy and disposal prices move — contact us for a current assessment.
SRF Dryer Manufacturer in New Zealand — FAQ
Do you supply SRF dryers in New Zealand?
Yes, built in Hertfordshire. No SRF line is commissioned in the country yet, so we set expectations by the waste and biomass dryers we already operate in Britain.
What separates SRF from RDF?
SRF is a classified fuel: it must meet the international specification for calorific value, chlorine and moisture. Reaching a consistent moisture by drying is what lets a fuel be graded as SRF rather than sold as unspecified RDF.
Who takes SRF here?
Cement and lime kilns, and other high-temperature industrial burners looking to cut coal, are the natural buyers. They need a graded, dried, high-calorific fuel they can meter into the kiln.
How does drying reach the target grade?
The moving floor mixes the shredded feedstock for even moisture loss while the control system holds the output band, so each batch lands within the classified moisture and calorific limits.
Does SRF help with levy and carbon costs?
Yes. It keeps burnable material out of a rising disposal levy and, by displacing coal, lightens the ETS unit liability the receiving kiln carries.
What quality checks does an SRF buyer expect?
A kiln operator typically wants declared limits on net calorific value, chlorine, moisture, ash and mercury, plus a documented sampling regime and batch traceability. Consistent drying underpins every one of those figures, because a stable moisture makes the remaining parameters repeatable across successive deliveries.