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Discharge & reuse standards
Applicable discharge consents, irrigation and landscape reuse norms, industrial reuse guidelines and any special limits for sensitive receptors, lakes or coastal waters.
Consulting & Design › Requirements, reuse & savings
Requirements, reuse & savings - from generation to application
Consulting & Design · Baseline to Requirements to Fit to Procurement to Delivery support
Once your baseline is in place, the next step is converting it into something vendors can actually price and design against. That means clear end-use targets, measurable approval criteria, and a savings case built on operating assumptions rather than aspirations.
Without this, bids come back on different interpretations of the same requirement set. With it, suppliers respond to the same requirements, selection stays clearer, and commissioning is far less likely to uncover gaps.
Reuse ladderapproval criteriaSavings logiccheck & monitoringDecision checkpoints
What you’ll leave with
- Reuse target ladder (today to future, with fallbacks)
- approval criteria & check plan (KPIs, tests, monitoring)
- Requirements pack (range, constraints, connection points)
- Savings / ROI logic tied to actual operating modes
Typical triggers
New reuse target, CAPEX/OPEX pressure, uncertain end-use quality, or a need to justify targets and costs to lenders/approvers.
OFFER
Make reuse intent approval-ready and buildable
We translate end-use targets into approval criteria, documentation depth and savings logic - so suppliers price to the same check and the project stays well-supported.
set constraints that dominate
set connection points + ranges
check approval + support depth
DE-RISK “brochure fit” outcomes
Where projects fail
Targets are vague (“TSE quality”, “fit for reuse”) and savings are hand-waved - bidders interpret differently and check is missing.
What we set
- End-use targets + fallback modes.
- Quality criteria (quality, reliability, and monitoring).
- Savings assumptions (energy, chemicals, disposal, reuse value).
How this changes delivery
Vendors design and price to the same approval logic. Decisions become faster, and the selected route is easier to commission and verify.
Scope boundary
We define the process-side requirements that later design and supplier responses must follow, including target conditions, review logic, reuse-related checks, and the information depth needed to support approval and value decisions.
Interactive view
Choose a reuse outcome - see how requirements + check change
This view is a fast, decision-friendly preview of what must be set (targets, constraints, monitoring intent and review basis) for different end-uses - so suppliers price and design to the same requirements.
Click a card to preview how the work changes.
Preview
Cooling / make-up water requirements
Set the operating range (scaling, fouling, chemistry) and define the monitoring + approval check that operations can sustain.
Scaling + corrosion
Fouling + organics
Monitoring range
What we focus on
- Define scaling / corrosion range and practical headroom.
- Confirm fouling / organics loading and the pre-treatment duty.
- Check chemical compatibility (biocides, inhibitors) and concentration cycles.
- Capture network constraints (storage, drift losses, makeup quality operating context).
check / monitoring emphasis
- Set variability bounds (daily/weekly) and what “peak” check looks like.
- Agree sampling plan + QA chain and the lab methods that count.
- Define online monitoring points, alarm limits and response actions.
- Write start-up and steady-state quality criteria.
Typical outputs
Requirements matrix rows for cooling, check plan (sampling + monitoring), and quality criteria for commissioning + early optimisation.
Preview
Landscape irrigation requirements
Make reuse class and exposure assumptions explicit, then set the disinfection intent, aesthetics controls and verification plan.
Exposure + aesthetics
Disinfection intent
Distribution controls
What we focus on
- Confirm reuse class, exposure context and public connection point constraints.
- Define turbidity / aesthetics duty and odour control expectations.
- Set the disinfection approach (residual strategy, CT intent, dosing practicality).
- Capture storage, distribution and irrigation system compatibility.
check / monitoring emphasis
- Set verification metrics (turbidity, indicator organisms as applicable).
- Define monitoring points and “loss of barrier” alarms.
- Plan seasonal variability checks and reporting cadence.
- Write practical approval checks for commissioning and handover.
Typical outputs
Reuse-class assumptions captured, monitoring + approval checks defined, and a well-supported requirements pack for vendor proposals.
Preview
Agricultural reuse requirements
Higher assurance means deeper verification: define exposure context, soil/salinity impacts and support depth so approvals stay well-supported.
Higher assurance
Soil + salinity
Verification depth
What we focus on
- Set health assurance level and exposure assumptions (workers / public).
- Define soil and crop constraints (salinity, nutrients, long-term impacts).
- Set contaminant priorities and how variability is treated.
- Define contingency and bypass logic for events and seasonal shifts.
check / monitoring emphasis
- Specify verification frequency, support depth and reporting format.
- Identify critical control points and redundancy expectations.
- Define QA/QC expectations (chain-of-custody, methods, trend rules).
- Align stakeholder approvals and approval logic.
Typical outputs
Assurance-led requirements plus a verification plan structured so approvals and finance teams can review it without ambiguity.
Preview
Process reuse requirements
Industrial reuse needs stability: set the critical parameters, control strategy and hold points so “paper fit” becomes operable performance.
Process sensitivity
Uptime + continuity
Operator simplicity
What we focus on
- Define process sensitivity and the operating uptime requirement.
- Identify carry-over risks and the barrier intent for each.
- Set stability under load swings (buffering, turndown, upset handling).
- Capture operator load, maintainability and practical access constraints.
check / monitoring emphasis
- Set check for critical parameters (online + lab), including peaks.
- Define control strategy, alarms, and response actions (not just sensors).
- Write commissioning hold points and performance tests that matter.
- Align shutdown / maintenance panels with the approval plan.
Typical outputs
Process-aligned requirement set with hold points + support checks that reduce commissioning rework and operator burden.
Preview
Discharge / compliance requirements
Defensibility comes from methods: set the compliance range, sampling approach and approval checks for peaks and upsets.
Compliance clarity
Peaks + upsets
Audit readiness
What we focus on
- Define compliance range, outliers and what “non-compliance” means.
- Plan for peaks/upsets (shock loads, bypass risk, contingency routing).
- Set monitoring and sampling points (what, where, when, why).
- Capture reporting and documentation needs for approvers/audits.
check / monitoring emphasis
- Align sampling + reporting method (QA/QC, lab methods, chain-of-custody).
- Write approval checks for steady-state and peak conditions.
- Set support depth for performance verification and trend review.
- Capture risk-cost drivers (penalties, downtime, tanker, reputation).
Typical outputs
Compliance-aligned targets + support plan, plus savings logic linked to risk-cost avoidance and operational reliability.
view 2 OF 4
Reuse credibility comes from check
Reuse and discharge targets must be tied to measurable parameters, monitoring intent and review basis that operations can sustain.
Inputs: regulatory + internal requirements
We map each stream against external regulations and internal expectations, so design targets are defined by the standards you actually have to meet and the commitments you have made.
02
Internal and ESG expectations
Corporate water reuse, emissions and circularity targets; brand and stakeholder expectations; and how these translate into quality, reliability and reporting needs.
03
Future-readiness
Known or likely tightening of standards, growth in loads or reuse demand, and how much headroom the design should build in without becoming unrealistic.
Reuse route logic: generation to application to assurance
For each stream we work with, we trace a simple line from where it is generated, to where it can be used, and what quality that use demands. This stops reuse and recovery from being slogans and turns them into concrete design requirements.
LIQUID
Liquid streams
For STP, ETP, GWTP, vehicle wash and laundry streams we identify potential applications - cooling, irrigation, washing, process make-up - and the reuse classes and quality criteria each one needs.
SOLIDS
Biosolids and side streams
For sludge and biosolids we look at pathways to compost, biofertiliser, organo-mineral products or safe disposal, and what stability, dryness and contaminant limits each pathway requires.
Streams we typically work with
Across all our specialist design work, we focus on operating plants and facilities handling:
STP - Municipal / domestic sewage
ETP - Industrial / trade effluent
GWTP - Greywater treatment
VWRP - Vehicle wash water
LWRP - Laundry wash water
Biosolids & sludge to resource recovery
Savings logic: value opportunities (built on offsets + risk costs)
With requirements and applications clear, we identify where the design can create or protect value - not just in today's budget, but over the life of the system.
01
Water and input savings
Reduced potable or desalinated water purchase, lower tanker dependence, more efficient use of chemicals and better use of existing storage and networks.
02
Sludge, biosolids and logistics
Lower volumes to handle, fewer truck movements, improved stability and more predictable routes for biosolids to compost, fertiliser or other outlets.
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Link to approvals and business case
We capture these benefits in a way that supports internal approvals, lender discussions and ESG reporting, without overselling what the system can do.
What you receive from the requirements section
Outputs are written to be usable by technical teams, commercial teams, and solution providers - without ambiguity.
Requirements matrix
Outcome to parameter to target to method to review basis.
quality criteria
Normal / peak / upset requirements with review paths.
Scope & connection point checklist
Transitions, connections, monitoring, residuals, and responsibilities.
Reuse + savings view
Value logic connected to credible offsets and risk costs.
Design targets that follow from goals
Finally, we translate requirements, applications and value drivers into clear design targets - quality criteria, reliability levels, recovery goals and operational expectations. These targets guide the technology and equipment options explored in the next focus area.
At that stage we can judge which combinations of biological treatment, DAF or lamella clarification, filtration, membranes and biosolids pathways are credible against your targets and operating realities.