Projects › Biosolids
Solids-line planned separately from the liquid route? End-use outlet undefined while dewatering is already procured? Return liquors creating headworks problems with no defined route? These configurations package the biosolids pathway, from stabilisation and dewatering through to end-use, with connections, testing, and handover requirements defined before supplier engagement.
Overview
Project configurations are structured packages (scope + deliverables) that move from feed & constraints → process pathway → vendor alignment → implementation support.
Which configuration fits your project?Each configuration packages a full biosolids pathway, from feed stabilisation and dewatering through to product processing and end-use, with connections, testing plan, and handover requirements defined before supplier engagement. Find the one that matches your end-market and feed situation. If none fits exactly, the enquiry form below will get you to the right place.
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Project: Mono-incineration after anaerobic digestion
Suitable for: When volume reduction is the primary driver and long-term land disposal is restricted or unavailable.
Features: Thermal reactor, Sludge Dewatering, Sludge Drying
Delivers: Thermal pathway defined, energy recovery sized, and emission compliance mapped, ready for supplier pricing before equipment is specified.
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Project: Recover phosphorus and metals from ash
Suitable for: When an incineration plant is operating but phosphorus recovery and ash disposal compliance need to be formalised.
Features: Ash sampling, phosphorus recovery unit, Sludge Reuse Plan
Delivers: Recovery route scoped, phosphorus and metals value quantified, and residual risk position established before capital is committed.
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Project: Compost facility design and implementation
Suitable for: When a Class A soil product is the target and stable, well-managed operations are required alongside the technical design.
Features: ASP, windrow layouts, indoor compost pads, Sludge Composting
Delivers: Site layout and throughput basis confirmed, Class A route established, and output handling defined, ready to go to design or procurement.
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Project: Regulatory and market alignment for biosolids
Suitable for: When the end-use route is unclear or contested, and a regulatory and market basis needs to be established before any process design begins.
Features: Class A benchmarking, policy diagnostics, land use match
Delivers: Regulatory route confirmed, Class A compliance path clear, and market alignment tested, so the project moves forward with a clear route.
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Project: Produce biofertilizers from stabilized sludge
Suitable for: When stabilised cake is already available and value-added land application, with a defined product standard, is the target outlet.
Features: Sludge Drying, bio-additive strategy, pathogen control matrix
Delivers: Product formulation confirmed, application route and pathogen controls defined, and ESG reporting basis established alongside the technical scope.
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Project: Organo-mineral fertilizer from dried sludge
Suitable for: When dried cake quality is high enough to justify nutrient blending, product specification, and a commercial fertiliser market route.
Features: Sludge Drying, nutrient blending design, pelletization (optional)
Delivers: Product specification and nutrient profile confirmed, market fit assessed, and testing plan set, so the output is vendable, not just processed.
Work through end-market, pathway, and key inputs below. Each configuration is determined by your feed situation and target outlet. Use this to confirm the right starting point before reaching out.
Biosolids decisions should not stop at the dewatering step. They should continue through to the intended outlet, the treatment standard to be met, and whether the feed is stable enough for that route. This guide helps confirm the applicable biosolids configuration and define the next decision step.
Quick definitions: AD = Anaerobic digestion; Class A = pathogen-reduced biosolids standard (subject to local rules); Dewater = mechanical separation (decanter / screw press / filter press); Dry = drying beds or thermal drying; Compost = aerobic stabilisation for soil outputs; Organo-mineral fertiliser = processed nutrient product from dried solids; Biofertiliser = enriched solids with bio-additives; Ash recovery = P / heavy-metals recovery from mono-incineration ash.
Typical outlets: land application, compost, organo-mineral fertiliser, biofertiliser, or thermal/ash recovery routes.
The same biosolids route can carry very different handover requirements. We map the end-market and regulatory route to the required testing, assurance, and monitoring position.
Class A soil output
FlowPlan - Compost+
Best when the goal is a market-ready Class A soil product and the route needs stabilisation, curing, handling, and outlet quality to work together in day-to-day operations.
Value-added product
FlowPlan - Sludge+Fert
Use this when dried cake quality, nutrient value, and market route are strong enough to support product processing, tighter specification, packaging, and a more defined commercial outlet.
Thermal route
FlowPlan - Incineration+AshRec
This route fits where land outlets are constrained, thermal reduction is already part of the plan or becoming necessary, and ash handling or phosphorus recovery has to be built into the long-term route.
We capture the key inputs that decide feasibility and bankability: feed stability, space and retrofit connections, operator tolerance, and where the liquids, odour, and by-products go.
Most biosolids projects do not stay within one neat route. The target outlet, stabilisation level, drying requirement, sidestream return, and market route usually influence each other. A compost scheme may still need outlet and quality alignment confirmed first. A fertiliser route only works when drying, product specification, and market route are viable. A thermal route is usually driven by outlet risk, disposal pressure, ash handling, and recovery obligations. Tell us what sludge you have, what outlet you are aiming for, and what is still unresolved and we will map the right starting route.
Share your intended outlet, target product quality, and site constraints. We’ll identify the right FlowPlan biosolids route and turn it into a clear supplier scope, including testing, quality checks, and handover requirements.