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vps1_gitea_admin edited this page 2026-03-04 20:16:43 +00:00

Table of Contents

• settler
• Overview
• Purpose
• Configuration
• Upstream Connection
• Inputs and Outputs
• Input (Port 0)
• Output Port 0 - Process Data
• Output Port 1 - InfluxDB Telemetry
• Output Port 2 - Registration
• Dependencies
• Technical Requirements
• Testing

settler

Custom Node-RED node for secondary clarifier and sludge settling simulation.

Overview

Property	Value
Version	0.0.1
Category	Biological Process
Inputs	1
Outputs	3 (process / dbase / parent)
Part of	EVOLV

Purpose

The settler node models a secondary clarifier (settling tank) that receives mixed liquor from an upstream reactor node. It simulates:

• Gravity settling of suspended solids
• Sludge blanket height tracking
• Return Activated Sludge (RAS) concentration
• Effluent quality (clarified water)
• Waste Activated Sludge (WAS) removal

Configuration

Field	Description	Default
name	Node display name	-
enableLog	Enable node logging	false
logLevel	Log verbosity level	-
positionVsParent	Position relative to parent	-

Upstream Connection

The settler receives effluent from a reactor node. The reactor registers as an upstream child, and the settler pulls effluent data on state changes via the getEffluent method.

Integration note: The _connectReactor method expects getEffluent to return an array. This was a known bug fixed on 2026-03-02.

Inputs and Outputs

Input (Port 0)

Configuration updates and control commands.

Output Port 0 - Process Data

Settler state: sludge blanket height, effluent quality, RAS concentration.

Output Port 1 - InfluxDB Telemetry

Time-series data for settling parameters.

Output Port 2 - Registration

Upstream reactor connection messages.

Dependencies

• generalFunctions (MenuManager)

Technical Requirements

• Node.js >= 18
• Node-RED >= 3.x
• Upstream reactor node configured and connected

Testing

node --test test/basic/*.test.js
node --test test/integration/*.test.js
node --test test/edge/*.test.js