Lab · engineering sheets Process & instrumentation diagrams Each sheet is drawn from a declarative spec: ISA-5.1 tagged instruments on leaders, bowtie valves with their fail position, numbered balloons tied to a parts list, a logic block with the interlock rules, and a title block that says concept — not for construction . Pick a state and the drawing routes it: the live path highlighted, open valves hollow, closed valves filled, the governing rule lit.
Sheets · 23 Symbol library
PID-101 · microfluidic PID-102 · mec-dual-chamber PID-103 · algal-chip PID-104 · industrial PID-105 · benthic-pulse PID-106 · algae PID-107 · circular-miner PID-108 · carbon-fixer PID-109 · redox-flow-hybrid PID-110 · space-farer PID-111 · soil-health-guard PID-112 · living-facade PID-113 · skin-link PID-114 · ghost-power PID-115 · wastewater-ad PID-116 · wastewater-mfc-ad PID-117 · wastewater-cas PID-118 · wastewater-mec-ad PID-119 · wastewater-side-ec PID-120 · wastewater-side-struvite PID-121 · wastewater-side-nh3 PID-122 · mine-methane-biofilter PID-201 · mec-single-chamber
Co-flow · Re < 2000Open circuit · OCVFlow trip · FT low
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sheet 1 · membraneless microfluidic MFC · laminar co-flow separator · state: Co-flow (Re < 2000)
R-101 — Y-junction PDMS/glass chip. The virtual separator is diffusion broadening δ ≈ √(D·L/U) — it fails when the flow slows, not when a part breaks. R-101 MICROCHANNEL R-101 anode — Anode — the exoelectrogenic biofilm lives on this surface. − cathode — Cathode — where the terminal electron acceptor is reduced. + ANOLYTE + CELLS P-101 — Syringe / peristaltic pump at µL/min. Residence time is the whole design: too fast and the biofilm starves, too slow and the streams inter-diffuse. P-101 FEED XV-101 — Feed isolation. Fails closed: a trip starves the reactor rather than flooding it. XV-101·FC MIXED OUTLET SW-201 — Circuit isolator. Every state on this sheet that does not light the circuit draws this blade OPEN — which is what an OCV or disconnected reading actually is. switch closed — circuit made SW-201 SHUNT — Current-sense resistor. IT-202 reads the millivolt drop across it; the resistance has not been sized on this concept sheet, so the current span is a design span, not an instrument specification. SHUNT L-101 — External resistor. Swept for the polarization curve; fixed at R-int for max power. L-101 R-EXT 1 kΩ CATHOLYTE (OXIDANT) CATHOLYTE (OXIDANT) RETURN S-101 — Feed sample point — the inlet half of every removal / conversion figure. S S-101 S-102 — Effluent sample point. COD, VFA and product assays are grab samples; no transmitter on this sheet measures them. S S-102 ET-201 — Cell voltage across the load. With SW-201 open this is the OCV. ET 201 IT-202 — Cell current, read as the millivolt drop across the shunt. Power density is reported per projected anode area. IT 202 FT-101 — Feed flow — with the reactor volume this is the HRT the COD balance is built on. FT 101 PT 102 AT-301 — Anolyte pH at the inlet; the channel is too small to probe mid-run. AT 301 AT-302 — Outlet oxidant concentration — how much of the catholyte was actually used. AT 302 TT-601 — Temperature; report it with every performance number. TT 601 LT-701 — Reactor level — high-high trips the feed. LT 701 LSHH 702 UY-100 — Mode select: reads the tags below and commands the feed valve, the pumps and the circuit. UY 100 (1) MICROCHANNEL R-101 R-101 1 (2) Feed pump P-101 2 (3) Feed isolation valve XV-101 3 (4) Circuit switch SW-201 4 (5) External load L-101 5 UY-100 · CO-FLOW GUARD — READS FT-101, ET-201 Re < 2000 · FT-101 AT SETPOINT → LOAD CLOSED IT-202 = 0 → OCV · CHARACTERISATION ONLY FT-101 LOW → STREAMS MIX · XV-101 SHUT NOTES · 1. THE SEPARATOR IS THE FLOW: δ ≈ √(D·L/U). LOSS OF FT-101 IS LOSS OF SEPARATION, NOT A UTILITY FAULT. 2. POWER DENSITY PER ELECTRODE AREA (W/m²), NOT PER CHIP. 3. NO MEMBRANE — INTERNAL RESISTANCE IS SOLUTION-DOMINATED. PARTS LIST 1 MICROCHANNEL R-101 R-101 2 FEED PUMP P-101 3 FEED ISOLATION VALVE XV-101 4 CIRCUIT SWITCH SW-201 5 EXTERNAL LOAD L-101 PROCESS SIGNAL ELECTRICAL LIVE PATH MESSAI — LAB MEMBRANELESS MICROFLUIDIC MFC — PROCESS & INSTRUMENTATION DWG PID-101 · REV A · SHEET 1 OF 1 SCALE: SCHEMATIC · DIMS NOMINAL DRAWN: MESSAI · mes-pid-schematic CONCEPT — FOAK NOT FOR CONSTRUCTION Record
Pick an item on the sheet — a vessel, a valve, an instrument bubble — to read its engineering record.
Line list · PID-101 · values carry their basis Basis: design = a choice made for this concept sheet · literature = cited in the note · assumed = a placeholder nobody has justified yet. Stream Service Phase Flow Temp Press Composition / note feed ANOLYTE + CELLS LIQ 1–50 µL/min [design] 20–25 °C [design] — synthetic anolyte + planktonic inoculum effluent MIXED OUTLET LIQ 1–50 µL/min [design] — — spent anolyte + catholyte, mixed · the streams are only separate inside the channel circuit EXTERNAL CIRCUIT ELEC — — — electrons, not matter — drawn so the energy path is on the same sheet as the mass path service CATHOLYTE (OXIDANT) LIQ — — — oxidant catholyte (aerated buffer or ferricyanide)
Co-flow · Re < 2000 — Both streams at setpoint, laminar interface holding, circuit closed through the external resistor.
lint · 7 tagged items · 10 instruments · 0 problems
spec · libs/shared/pid-schematic/src/mes/model-sheets.ts · skill mes-pid-schematic
Related: the component catalog for the parts these sheets reference, and the 3D models at /lab .