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Complete MBR Engineering & Procurement Guide

Membrane Bioreactor (MBR) technology integrates biological wastewater treatment with microfiltration or ultrafiltration membranes. By replacing secondary gravity clarifiers with membrane separation, MBR systems achieve high biomass concentrations, produce superior effluent quality, and reduce the overall physical footprint by up to 50%.

High-Flux MBR Membrane Cassette For Wastewater
The High-Flux MBR Membrane Cassette is a high-performance submerged membrane filtration assembly designed for municipal sewage treatment, industrial wastewater purification, and water reuse...
Compact Package MBR Sewage System
The Compact Package MBR Sewage System integrates biological wastewater treatment and membrane separation into a packaged treatment unit. The system is engineered for decentralized sewage treatment...
Hollow Fiber MBR Membrane Bioreactor Pack
Submerged Hollow Fiber MBR Membrane Bioreactor Packs are engineered solid-liquid separation modules designed for advanced MBR wastewater treatment systems. Operating directly within activated...
Submerged Flat Sheet MBR Membrane Module
The Submerged Flat Sheet MBR Membrane Module provides advanced solid-liquid separation inside a membrane bioreactor system. Operating directly within the biological aeration tank, the module...
Industrial MBR Wastewater Treatment System
An Industrial Membrane Bioreactor (MBR) System combines biological wastewater treatment with advanced membrane filtration. Designed for high-strength industrial applications, MBR technology...
Containerized MBR Sewage Treatment Plant
Containerized MBR sewage treatment plants integrate biological wastewater treatment, membrane filtration, aeration, pumping and control equipment into a factory-assembled modular system.

Complete System Scope

Category	Component Description
Pretreatment	Fine screens , coarse screens, grit removal, oil & grease separators
Equalization	Equalization tank, mixing equipment, transfer pumps
Biological Treatment	Anoxic & aerobic tanks, fine-bubble diffusers, DO/pH/ORP monitoring sensors
Membrane Separation	Submerged membrane cassettes, air-scouring blowers, permeate extraction pumps
Sludge & Cleaning	Mixed liquor recirculation pumps, waste activated sludge (WAS) pumps, automated CIP skid
Controls & Automation	Integrated PLC cabinet, HMI touch panel, inline flowmeters, TMP transmitters

Step-by-Step Engineering Selection Process

80 M³/d Packed Wastewater Treatment Equipment

Confirm Flow Rates：
Evaluate average daily flow, maximum daily flow, peak hourly flow, and seasonal or production-driven fluctuations.

Analyze Influent Quality：
Establish baseline parameters: BOD, COD, TSS, TN, TP, pH, and temperature. For industrial streams, test for oils, salinity, heavy metals, and recalcitrant organics.

Define Effluent Targets：
Determine discharge limits or reuse specifications (e.g., cooling tower makeup, irrigation, or reverse osmosis feed) to select downstream polishing steps.

Establish Pretreatment Protection：
Specify fine screening and equalization to protect membrane fibers from hair, debris, and hydraulic spikes.

Select Membrane Configuration：
Choose between Submerged or Sidestream arrangements, and select Hollow Fiber or Flat Sheet modules based on flux, footprint, and maintenance needs.

Calculate Lifecycle Operating Costs：
Evaluate total power demand (aeration, air scouring, pumping), chemical consumption, sludge disposal, and long-term membrane replacement schedules.

Verify Site & Quality Standards：
Confirm layout dimensions, maintenance access clearance, utility supply, and supplier manufacturing Quality Assurance / Factory Acceptance Testing (FAT) records.

6000 L/H Containerized RO Water Treatment System

Technical Specifications & Configurations

Membrane Technology Comparison

Parameter	Hollow Fiber MBR	Flat Sheet MBR
Membrane Material	PVDF / PTFE	PVDF / PES
Pore Size Range	0.04 - 0.1	0.08 - 0.4
Packing Density	High	Moderate
Design Flux	15 - 25	15 - 30
Operating TMP	0.1 - 0.5	0.05 - 0.3
Fouling Control	Continuous air scouring + periodic relaxation	Air scouring + gravity/low-pressure suction
Cleaning Method	Online backwashing + chemical CIP	Chemical soaking (in-situ or tank removal)
Typical MLSS	8,000 - 12,000	8,000 - 15,000

System Performance: MBR vs. Conventional Activated Sludge (CAS)

Specification	MBR System	CAS System
Solid-Liquid Separation	Ultrafiltration / Microfiltration	Gravity Secondary Clarifier
Required Footprint	Compact (30% - 50%)	Large (requires secondary clarifiers)
Operating MLSS	8,000 - 15,000mg/L	2,000 - 4,000 mg/L
Sludge Retention Time (SRT)	20 - 40days	5 - 15days
Effluent TSS	< 2 mg/L	10 - 30mg/L
Effluent Turbidity	< 0.2 NTU	2 - 5NTU
RO Feed Suitability	Direct feed ready	Requires multi-media filtration

Quality Control & Supplier Verification

Buyers should inspect key manufacturing evidence prior to procurement:

Fabrication Quality

Certified welding logs (WPS/PQR), skid frame non-destructive testing, and corrosion-resistant coatings.

Integrity Testing

Factory pressure decay test certificates for all individual membrane modules.

Electrical Integration

Full PLC loop verification, panel wiring certification, and compliance with CE/UL standards.

FAT Protocol

Factory Acceptance Testing logs including hydrostatic pressure tests, dry-run pump/blower tests, and automated CIP sequence validation.

FAQ

Q: What is an MBR system and how does it differ from traditional treatment?

A: An MBR (Membrane Bioreactor) combines biological treatment with membrane microfiltration or ultrafiltration. Unlike Conventional Activated Sludge (CAS) systems that rely on gravity settling in secondary clarifiers, MBR uses membranes to filter out suspended solids, producing higher effluent purity within a significantly smaller footprint.

Q: Is fine screening mandatory upstream of an MBR system?

A: Yes. Fine screening is essential to remove hair, trash, fibers, and abrasive solids. Without proper fine screening, fibers accumulate within membrane modules, causing irreversible fouling, physical damage, and severe performance drop.

Q: What is the typical lifespan of MBR membranes?

A: Under normal operating conditions with proper pretreatment, flux management, and regular chemical cleaning (CIP), high-quality PVDF or PTFE MBR membranes typically last between 5 to 10 years.

Q: How is membrane fouling managed in an MBR system?

A: Fouling is controlled through a combination of physical and chemical methods: continuous air scouring below the modules, automated physical relaxation/backwashing intervals, and periodic Clean-In-Place (CIP) maintenance using sodium hypochlorite (NaOCl) and citric acid.

Q: Why are MBR systems ideal for water reuse applications?

A: MBR systems yield effluent with TSS under 2mg/Land turbidity below 0.2NTU, effectively removing bacteria and pathogens. This consistent quality allows the treated water to be reused directly for irrigation, cooling towers, or as high-quality feed water for Reverse Osmosis (RO) systems.

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