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LOCAL DESIGN · 0.1.0-wave02a
BIOLOGICAL PROCESS MODE
Conventional activated sludge
Carbon removal is the baseline. Nitrification adds an explicit AOB SRT and nitrogen balance.
DESIGN INPUTS
01 / 02Process basis
01
Project / design basis
02
Influent / effluent basis
BOD5 and COD remain separate measured bases.
The entered BOD5 influent and target values are the selected biological design basis. The model does not predict downstream clarification-related particulate BOD5 effects.
03
Solids / operating basis
SRT is reported on a total MLVSS inventory and loss basis.
Carbon-removal mode requires a user-selected SRT. No universal minimum carbon-removal SRT is applied.
Advanced assumptions & solids boundariesProject editable
SCREENING / PROJECT ASSUMPTION — these starting values are not universal constants or EPA defaults. Replace them with site measurements or calibrated project values.
CURRENT RESULT
VALIDEngineering decision
Mass closurePASS
Process RAS boundaryContinuity only
Effluent TSS roleImposed design boundary
Calculation boundaries
Secondary clarificationEffluent TSS is imposed; settling and capacity are not predicted.
Oxygen systemBiological AOR only; transfer and blower duty are outside this calculation.
Peak oxygen demandUnavailable until an explicit peak case is provided.
RESULT PACKAGE
Report this process state
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Core authority
@atlas/biological-process-core · 0.1.0-wave02a37e4f57c142d38f51026d5246225d30e4b5232398c034b54d0d9910ba8617345DETAILED ENGINEERING RESULTS
CARBON REMOVALBiological process balance
Project / design basis
| Parameter | Result | Basis / source |
|---|---|---|
| Project / case | Municipal carbon removal reference | Named design caseUser input |
| Process mode | Carbon removal | Conventional activated sludgeUser-selected mode |
| Flow | 10,000 m³/d | AVERAGE_DAYUser input |
| Temperature | 20 °C | Biological process temperatureUser input |
Influent / effluent basis
| Parameter | Result | Basis / source |
|---|---|---|
| Biological substrate basis policy | BOD5 — user-selected biological design basis | Selected substrate basis: BOD5The entered BOD5 influent and target values are the selected biological design basis. The model does not predict downstream clarification-related particulate BOD5 effects. |
| Influent BOD5 | 210 mg/L as BOD5 (O₂) | Selected substrate basis; no BOD/COD conversionUSER_CONFIGURED |
| Effluent target BOD5 | 10 mg/L as BOD5 (O₂) | Selected substrate basis; no BOD/COD conversionUser target |
| Applied BOD5 load | 2,100 kg BOD5/d | Q × influent concentration@atlas/biological-process-core |
| Removed BOD5 load | 2,000 kg BOD5/d | Q × (influent − effluent target)@atlas/biological-process-core |
Biomass / solids inventory
| Parameter | Result | Basis / source |
|---|---|---|
| Gross heterotroph synthesis | 1,200 kg VSS/d | Gross BOD5-removed yield basisSCREEN_HET_Y_BOD5 |
| Heterotroph decay rate at design temperature | 0.05 d⁻¹ | bH(T)=bH,20 × θ^(T−20°C)SCREEN_HET_DECAY_20 |
| Heterotroph decay loss | 400 kg VSS/d | Gross synthesis − net active heterotroph production@atlas/biological-process-core |
| Net active heterotroph production | 800 kg VSS/d | Active heterotroph VSS; excludes inert solids@atlas/biological-process-core |
| Active autotroph production | Not available kg VSS/d | Active AOB VSS net of decayNot applicable |
| Influent inert VSS | 200 kg VSS/d | Externally characterized inert influent VSSUser/project assumption |
| Endogenous residue | 0 kg VSS/d | Enabled residue fraction of heterotroph decaySCREEN_ENDOGENOUS_RESIDUE_FRACTION |
| Fixed / inorganic solids | 230 kg TSS/d | Nonvolatile TSS loadUser/project assumption |
| External chemical solids | 0 kg TSS/d | External supplied TSS; no reagent sizingUser input |
| Total VSS production | 1,000 kg VSS/d | Active biomass + inert influent + endogenous residue@atlas/biological-process-core |
| Total TSS production | 1,230 kg TSS/d | VSS production + fixed and externally supplied chemical TSS@atlas/biological-process-core |
| Total MLVSS inventory | 10,000 kg VSS | Total MLVSS inventory at selected SRT@atlas/biological-process-core |
| Total MLSS inventory | 12,300 kg TSS | MLSS concentration × aeration-tank volume@atlas/biological-process-core |
| VSS/TSS production fraction | 0.813 kg VSS/kg TSS | Production basis; does not imply all VSS is active biomass@atlas/biological-process-core |
Solids retention
| Parameter | Result | Basis / source |
|---|---|---|
| Achieved MLVSS SRT | 10 d | MLVSS inventory / external MLVSS WAS and effluent losses@atlas/biological-process-core |
| Removed-basis F/M | 0.2 kg BOD5/(kg MLVSS·d) | Removed BOD5 load / MLVSS inventory; applied-basis F/M remains primary@atlas/biological-process-core |
RAS / WAS continuity
| Parameter | Result | Basis / source |
|---|---|---|
| Required WAS flow | 141.427 m³/d | External WAS flowDerived from WAS TSS and imposed effluent TSS boundary |
| WAS solids loss | 1,131.414 kg TSS/d | External WAS TSS mass loss@atlas/biological-process-core |
| Effluent TSS loss | 98.586 kg TSS/d | External loss from imposed effluent TSS design boundaryNot a clarifier prediction |
| Process RAS requirement | 7,504.444 m³/d | Internal recycle; not net solids generation/removalAlgebraic process-continuity assumption only |
| RAS / influent flow ratio | 0.75 m³/m³ | Process continuity onlyNo settling capacity or clarifier performance prediction |
Nitrogen balance
| Parameter | Result | Basis / source |
|---|---|---|
| Influent NH4-N | Not available kg N/d | Ammonium expressed as NUser input |
| NH4-N oxidized | Not available kg N/d | NH4-N oxidized after explicit biomass assimilation@atlas/biological-process-core |
| Heterotroph N assimilation | Not available kg N/d | Biomass N content × active heterotroph VSS@atlas/biological-process-core |
| Autotroph N assimilation | Not available kg N/d | Biomass N content × active autotroph VSS@atlas/biological-process-core |
| Unmodeled organic nitrogen context | Not available kg N/d | TKN − NH4-N; no mineralization modeledReported context only; not included as NH4-N oxidized |
| NH4-N balance residual | Not available kg N/d | NH4-N available − heterotroph assimilation − autotroph assimilation − oxidation@atlas/biological-process-core |
Alkalinity balance
| Parameter | Result | Basis / source |
|---|---|---|
| Influent alkalinity | Not available mg/L as CaCO₃ | Influent alkalinityNot applicable |
| Nitrification consumption | Not available kg CaCO₃/d | 7.14 kg CaCO3/kg NH4-N oxidizedUS EPA Nutrient Control Design Manual |
| Denitrification recovery | Not available kg CaCO₃/d | 3.57 kg CaCO3/kg NO3-N reduced; actual adapter-supplied reduction onlyNot used by conventional product |
| Residual alkalinity | Not available mg/L as CaCO₃ | Influent − nitrification consumption + actual adapter recoveryNo chemical dose is sized by this tool |
Biological oxygen requirement
| Parameter | Result | Basis / source |
|---|---|---|
| Carbonaceous AOR | 1,864 kg O₂/d | Removed BOD5 × entered BODu/BOD5 1.5 minus 1.42 kg O2/kg net active heterotroph VSS synthesis.Biological demand before oxygen transfer |
| Nitrification AOR | 0 kg O₂/d | 4.57 kg O2/kg NH4-N oxidized to nitrateUS EPA Nutrient Control Design Manual |
| Denitrification oxygen credit | 0 kg O₂/d | 2.86 kg O2/kg actual NO3-N reducedAdapter-only; zero for Activated Sludge Designer |
| Average total AOR | 1,864 kg O₂/d | Carbonaceous + nitrification − actual denitrification creditBiological AOR; not oxygen-transfer/blower duty |
| Peak AOR | Not available kg O₂/d | No peak scenario or documented peak basis suppliedPeak is null; no generic peak factor |
Mass closure
| Parameter | Result | Basis / source |
|---|---|---|
| Authoritative closure state | PASS | Generated TSS = WAS external loss + secondary effluent TSS loss; RAS cancels internally@atlas/biological-process-core |
| Generated TSS | 1,230 kg TSS/d | External solids generated@atlas/biological-process-core |
| WAS external loss | 1,131.414 kg TSS/d | External loss@atlas/biological-process-core |
| Effluent external loss | 98.586 kg TSS/d | External loss at imposed TSS boundary@atlas/biological-process-core |
| Closure residual | 0 kg TSS/d | Generation − WAS loss − effluent lossTolerance 0 kg/d; RAS net generation is zero |
Coefficient registry & provenance
| Coefficient | Value | Authority / source / policy |
|---|---|---|
| Flow/concentration mass-load divisorFLOW_CONCENTRATION_LOAD_DIVISOR | 1,000 L/m³ and mg/gREFERENCE_SUPPORTED | Q[m³/d]×C[mg/L]/1000 = kg/dSI dimensional conversion.Steady-state volumetric flow and mass concentration.Fixed dimensional conversion. |
| Heterotroph gross yield on BOD5 removedSCREEN_HET_Y_BOD5 | 0.6 kg VSS/kg BOD5 removedSCREENING_ASSUMPTION | Gross synthesis before decay; BOD5 basisWave 02A independent benchmark project assumption. It is not an EPA default.Editable initial value for preliminary steady-state screening only.Visible, editable screening assumption; site/project calibration required. |
| Heterotroph endogenous decay at 20°CSCREEN_HET_DECAY_20 | 0.05 d⁻¹SCREENING_ASSUMPTION | Specific heterotroph decay rateWave 02A independent benchmark project assumption. It is not an EPA default.Temperature-corrected with the separately declared project θ.Visible and editable. |
| Heterotroph decay temperature coefficientSCREEN_HET_THETA_DECAY | 1.04 dimensionlessSCREENING_ASSUMPTION | bH(T)=bH,20×θ^(T−20°C)Screening assumption; no universal value established in Gate 02.Project temperature correction for heterotroph decay only.Visible and editable; not shared with AOB kinetics. |
| Biomass nitrogen contentSCREEN_BIOMASS_N | 0.08 kg N/kg active VSSSCREENING_ASSUMPTION | Nitrogen assimilation for heterotroph and autotroph net productionWave 02A independent benchmark project assumption; not a universal plant constant.Explicit ammonia assimilation term in the steady-state N balance.Visible and editable. |
| Endogenous residue fraction of decaySCREEN_ENDOGENOUS_RESIDUE_FRACTION | 0 dimensionlessSCREENING_ASSUMPTION | Explicit residue yield from decay lossDisabled in the independent reference case; no universal fraction established.Zero disables residue production; nonzero values are separately reported as inert/endogenous VSS.Visible project input; default is disabled, not a biological law. |
| Influent inert VSS loadSCREEN_INFLUENT_INERT_VSS | 200 kg VSS/dSCREENING_ASSUMPTION | Externally supplied influent inert solids massWave 02A independent benchmark project assumption.Added to VSS production and inventory separately from active biomass.Visible and editable; replace with influent characterization. |
| Influent fixed/inorganic TSS loadSCREEN_FIXED_TSS | 230 kg TSS/dSCREENING_ASSUMPTION | Externally supplied fixed solids loadWave 02A independent benchmark project assumption.Added to TSS production only; not active or volatile biomass.Visible and editable; replace with influent characterization. |
| Externally supplied chemical TSSSCREEN_EXTERNAL_CHEMICAL_TSS | 0 kg TSS/dSCREENING_ASSUMPTION | Chemical solids supplied by a separate process calculationNo chemical solids are included in the Wave 02A benchmark.External input only; this core does not size or select chemical reagents.Visible project input; default zero means none supplied. |
| WAS TSS concentrationSCREEN_WAS_TSS | 8,000 mg/L as TSSSCREENING_ASSUMPTION | Process-continuity assumption onlyWave 02A independent benchmark project assumption; not a clarifier capacity prediction.Used to derive WAS flow from required external WAS solids loss.Visible and editable. |
| RAS/underflow TSS concentrationSCREEN_RAS_TSS | 8,000 mg/L as TSSSCREENING_ASSUMPTION | Process-continuity assumption onlyWave 02A independent benchmark project assumption; not a clarifier capacity prediction.Algebraic RAS continuity balance; no settling/flux inference.Visible and editable. |
| Imposed effluent TSS boundarySCREEN_EFFLUENT_TSS | 10 mg/L as TSSSCREENING_ASSUMPTION | IMPOSED_DESIGN_BOUNDARYWave 02A independent benchmark project assumption; not predicted by this product.External solids mass closure only; not a secondary clarifier prediction.Visible and editable. |
| Project RAS/plant-flow operational screenSCREEN_MAX_RAS_RATIO | 1.2 m³/m³SCREENING_ASSUMPTION | Continuity operating limit; not a hydraulic/clarifier capacity ratingScreening assumption only.If required RAS exceeds this value, return CAPACITY_CONFLICT; never cap a required result.Visible and editable; optional. |
| Ultimate BOD to BOD5 ratioSCREEN_BODU_BOD5 | 1.5 kg BODu/kg BOD5SCREENING_ASSUMPTION | Carbonaceous AOR oxygen-equivalent inputWave 02A independent benchmark project assumption. Not universal.Used only for BOD5-basis carbonaceous AOR when entered; not used to convert BOD5 to COD.Visible and editable; use measured/site-specific ultimate BOD where available. |
| Biomass synthesis oxygen equivalentBIOLOGICAL_OXYGEN_BIOMASS_EQUIVALENT | 1.42 kg O2/kg VSSREFERENCE_SUPPORTED | Empirical-cell oxygen equivalent 160/113US EPA, Biological Concepts for Design and Operation of the Activated Sludge Process, empirical biomass formula C5H7NO2 and oxygen equivalent 160/113.Applied only as the explicitly named net active heterotroph biomass credit in the Wave 02A AOR basis.Fixed empirical conversion; changing the biomass-credit method requires a new model revision. |
Warnings / limitations
- No calculation warningsReview the declared model assumptions and references before design adoption.
- Clarifier boundaryEffluent TSS is imposed as a design boundary. FluxMatrix owns settling, blanket, geometry and capacity behavior.
- Oxygen boundaryThis is biological AOR only. OxyMatrix owns future oxygen-transfer and blower calculations and must consume accepted AOR without recalculating biology.
- Alkalinity boundaryThe core reports residual biological alkalinity. NutriMatrix owns purchased alkalinity reagent selection, feed and cost.
01
엔지니어링 근거
방법론
Deterministic steady-state process calculation on an explicit BOD5 or COD basis. Heterotroph synthesis and decay remain separate from inert and fixed solids.
The selected BOD5 or COD values are the biological design substrate basis. COD is used as entered without automatic fractionation into biodegradable, soluble, inert, or particulate non-biodegradable COD; provide an appropriate project/site biological COD basis or explicitly accept the un-fractionated screening assumption. For BOD5, the model does not predict downstream clarification-related particulate BOD5 effects.
Selected SRT is defined on total MLVSS inventory divided by external MLVSS loss. Carbon-removal mode requires a user-selected SRT; nitrification mode screens minimum SRT from temperature, effluent NH4-N, DO, AOB growth and decay.
F/M is applied substrate load divided by aeration-tank MLVSS inventory. Biological AOR is calculated before oxygen transfer and blower requirements.
표준 / 참조 근거
가정
- Heterotroph yield, decay, temperature correction, BODu/BOD5, biomass nitrogen content and solids composition are visible project or screening assumptions, not universal EPA defaults.
- The EPA-based AOB coefficient set is a reference set only; project/site calibrated overrides remain available and carry their source note.
- Secondary-effluent TSS is an imposed design boundary unless a later clarifier model supplies a prediction.
범위 / 제한사항
- Preliminary steady-state activated-sludge process calculation; no dynamic, toxicity, alkalinity reagent-dose, denitrification, EBPR or chemical phosphorus model.
- Process RAS continuity is an algebraic solids-balance requirement. It does not predict settling flux, blanket behavior, clarifier geometry capacity or effluent TSS.
- Biological AOR is not oxygen-transfer performance, diffuser airflow or blower sizing. OxyMatrix remains the oxygen-transfer authority.
02
엔지니어링 경로
일반 활성슬러지 공정 분기
- 폐수 1차 침전
- 활성슬러지 설계 도구
- OxyMatrix 향후 연동 모드는 승인된 생물학적 AOR을 사용합니다. 현재 자동 전송은 없습니다.
- 2차 고형물 분리 — FluxMatrix 침전 및 용량 검토는 공정 RAS 연속성 계산과 별도로 수행합니다.
대체 영양염 제거 공정 분기
- BNRMatrix 영양염 제거 구성의 대체 생물 공정이며 이 설계 도구 다음의 필수 단계가 아닙니다.