/ CASE FILE 05 · EPC DOCUMENTARY · PUBLIC RELEASE

Zero civil work. 100% water reuse.
Deep in the West African bush.

A fully containerized Membrane Bio-Reactor (MBR) sewage treatment plant engineered for a 500-worker off-grid gold mining camp. Deployed in 48 hours. This is the field record — not the brochure.

Request System Audit

POPULATION

500PE

BOD₅ REDUCTION

350 → <10mg/L

CIVIL WORK

ZEROConcrete

PATHOGENS

99.9% Killed

System Technical Specifications

Engineering Data Sheet

Capacity

100 m³/day

Designed for 500 PE (Workers).

Membrane Technology

0.04μm PVDF

Reinforced Hollow Fiber MBR.

Civil Work Required

Zero Concrete

100% Above-ground Corten steel tank.

Effluent Standard

WHO Reuse

Safe for dust suppression & irrigation.

/ EXECUTIVE SUMMARY

In mid-2023, a multinational gold mining corporation established a new extraction camp in a remote region of West Africa. With zero municipal infrastructure and severe dry-season water scarcity, they needed to treat raw sewage from 500 workers and safely reuse the effluent for road dust suppression and toilet flushing. The catch? The camp might relocate in 3 years, so pouring concrete aeration basins was out of the question.

WANDONG ENVIRO delivered a 100% Above-Ground Containerized MBR Plant. By integrating the anoxic/aerobic biochemical process and submerged PVDF ultrafiltration membranes into a modified 40HQ Corten steel container, we eliminated all civil engineering requirements. The system was dropped onto a compacted dirt pad, connected to power and pipes, and began producing crystal-clear, odor-free water within 48 hours of arrival.

/ MODULE 02 — THE RAW REALITY

The site refused to cooperate.

Three constraints that would have killed a traditional concrete STP (Sewage Treatment Plant). We documented them on day one.

DEADLY CONSTRAINT · 01

SUNK COST RISK

The "Stranded Asset" Trap

The mining camp has a lifespan of just 3 to 5 years. Pouring underground concrete aeration basins deep in the African bush takes months, relies on unreliable local contractors, and becomes a 100% sunk cost when the camp relocates. They needed an asset that moves when they move.

DEADLY CONSTRAINT · 02

OPEX BLEEDING

Bleeding Cash on Water Trucks

The camp was burning through $15,000 a month just trucking in fresh water for road dust suppression and toilet flushing. Discharging raw sewage into the environment wasn't just an ecological hazard; it was literally pouring money into the dirt.

DEADLY CONSTRAINT · 03

OPERATIONAL HAZARD

The Bio-Crash Threat

There are no biochemical engineers in the jungle. If a traditional activated sludge system crashes in the 40°C heat, the camp fills with raw sewage stench within 24 hours, risking disease outbreaks and worker strikes. The system had to be absolutely foolproof.

/ MODULE 03 — THE ENGINEERED CURE

We didn't just supply equipment.
We engineered a paradigm shift.

Here is exactly how our engineering team neutralized the site's deadly constraints.

CURE FOR CONSTRAINT 01

100% Mobile "Plug & Play" Asset

We engineered the entire Anoxic/Aerobic process into a heavily reinforced 40HQ Corten steel container. It drops onto a simple compacted dirt pad. When the camp relocates, disconnect the pipes, load it on a flatbed, and deploy it at the next site. Zero concrete. Zero stranded assets.

CURE FOR CONSTRAINT 02

Direct-to-Truck Water Recovery

By utilizing highly-permeable PVDF hollow-fiber MBR membranes, we didn't just treat the sewage; we transformed it into WHO-grade clear water. The camp immediately cut their freshwater trucking fleet by 80%, turning a waste liability into a high-ROI asset.

CURE FOR CONSTRAINT 03

Foolproof Siemens Automation

We replaced the need for a biochemist with a Siemens S7 PLC. It auto-regulates aeration based on DO (Dissolved Oxygen) sensors, auto-triggers membrane backwashing, and pushes SMS alerts via satellite. It runs 24/7 with just one local worker doing a 10-minute daily visual check.

/ MODULE 04 — ENGINEERING BLUEPRINT

A biological powerhouse inside a 40HQ steel box.

By maintaining MLSS (Mixed Liquor Suspended Solids) at 8,000-10,000 mg/L, we shrank the required biological footprint by 60%, allowing the entire plant to fit inside a single shipping container.

01 //

Mechanical Bar Screen & EQ Tank

Removes large debris/plastics. Buffers peak flow during morning/evening shift changes.
02 //

Anoxic Denitrification Zone

Internal sludge recirculation strips Total Nitrogen (TN) without chemical addition.
03 //

Aerobic Submerged MBR Zone

Reinforced PVDF hollow fiber membranes (0.04µm). Absolute physical barrier against bacteria and suspended solids.
04 //

UV Disinfection

Final pathogen kill. Effluent is crystal clear and biologically safe for immediate reuse.

3D CAD / P&ID DRAWING

Full skid isometric CAD & P&ID (DWG-WD-2023-WA-PID-003)
available during technical consultation.

FIG. 04.1 — MBR PROCESS BLOCK FLOW EXCERPT

/ MODULE 04.5 — THE PARAMETER SHIFT

The Chemical Verdict.

Parameter	Feed Water (Raw Sewage)	Permeate (Output)	Target Standard (Reuse)
Biochemical Oxygen Demand (BOD₅)	350 mg/L	< 10 mg/L	< 20 mg/L
Chemical Oxygen Demand (COD)	600 mg/L	< 30 mg/L	< 50 mg/L
Total Suspended Solids (TSS)	250 mg/L	Not Detected	< 5 mg/L
Fecal Coliforms (Pathogens)	10⁶ CFU/100mL	Not Detected	Zero (Safe for Irrigation)

// MODULE 05 — FACTORY ACCEPTANCE TEST

Witnessed FAT. 72 hours. Zero compromises.

FAT DATE: 2023-08-10 → 2023-08-13

WITNESS: Client QA + SGS Third-Party

RESULT: PASS · 0 NCR

PLAY FAT HIGHLIGHTS

REC ● WANDONG WORKSHOP 01 · BAY B · 12.08.2023 14:30

TANK HYDRO TEST

FULL VOLUME · 24 HR

MEMBRANE TMP

-15 kPa @ DESIGN FLUX

AERATION BLOWER

VIBRATION < 2.5 mm/s

PLC LOGIC TEST

AUTO-BACKWASH PASSED

// MODULE 06 — BILL OF MATERIALS (EXCERPT)

The physical evidence.

Every line item below is in-service in West Africa today. 100% Tier-1 global supply chain.

P/N · WD-MBR-PVDF-10

Submerged MBR Modules

Reinforced Hollow Fiber · 0.04µm Pore Size

P/N · WD-ROOTS-BLW

Roots Aeration Blowers

1 Duty + 1 Standby · Acoustic Enclosure

P/N · CNP-SP-304

Permeate Suction Pumps

SS304 Self-Priming · VFD Controlled

P/N · WD-UV-254NM

Commercial UV Sterilizer

SS316L Reactor · 99.9% Pathogen Kill

P/N · WD-SCADA-S7

Siemens PLC Control Panel

S7-1200 PLC + Auto-Backwash Logic

P/N · WD-CTR-40HQ-EPOXY

Modified 40HQ Container

Corten Steel · Heavy-Duty Epoxy Coated Internal Tanks

/ MODULE 07 — DEPLOYMENT DIARY

10 weeks. 4 milestones. Documented.

2023.05.10 → 2023.06.05 · 4 WEEKS

Design & Engineering

Biological modeling based on 500 PE (Population Equivalent). Container structural modification designed to integrate EQ, Anoxic, and Aerobic zones into a single 40HQ footprint.

2023.06.10 → 2023.08.13 · FAT

Fabrication & Factory Acceptance

Internal tank welding and epoxy coating completed. Full hydraulic test and PLC auto-backwash logic verified. Ready for plug-and-play dispatch.

2023.08.20 → 2023.09.25 · TRANSIT

Ocean Freight & Site Erection

Shipped as standard 40HQ SOC (Shipper Owned Container). Dropped onto compacted dirt pad at the mining camp. Zero concrete poured.

Shipping Containerized MBR Plant to West Africa

2023.09.28 · GO-LIVE

Commissioning & Handover

Biological seeding completed. System switched to AUTO mode. Clear, odorless effluent immediately pumped to dust-suppression water trucks.

Commissioning of MBR Sewage Plant at Mining Camp

/ MODULE 08 — FINANCIAL VERDICT

The ledger doesn't lie.

Verified by mine operations team. 12-month post-commissioning data.

ANNUAL FRESHWATER SAVING

\$185K

vs. previous cost of trucking in fresh water for dust suppression and toilet flushing.

CIVIL CAPEX AVOIDED

100%

Zero concrete poured. The entire asset can be lifted and relocated to the next mining site when this camp closes.

VERIFIED

PAYBACK PERIOD

1.2 yrs

Driven by the elimination of water trucking costs and zero environmental discharge fines.

EFFLUENT BOD₅

< 10 mg/L

EFFLUENT TSS

Not Detectable

SLUDGE YIELD

Extremely Low

COMPLIANCE

WHO REUSE

*Includes complete P&ID, BOM excerpt, and detailed OPEX calculation model.

/ MODULE 09 — THE CROSS-BORDER STANDARD

No Matter the Industry,
Our Baseline Stays the Same.

1. Zero Civil Work

100% skid-mounted and containerized. No site construction, no foundations, no delays.

2. Factory-Direct

No middlemen. No markup chains. The lowest Total Cost of Ownership in the industry.

3. 100% FAT Tested

Video-verified Factory Acceptance Testing before shipping. What you see is what you get.

4. Lifetime Support

Zero downtime. We provide 24/7 video troubleshooting and fast-track global air-freight for 100% genuine parts.

/ MODULE 10 — VOICE OF CLIENT & TECH Q&A

Words from the men who signed the cheque.

We are a mining company, not a water utility. We needed a system that we could drop on the dirt, plug in, and forget about. WANDONG's MBR container gave us exactly that. It treats all our camp sewage and gives us clean water for the dust trucks.

CITATION

Camp Operations Manager

Multinational Gold Extraction Corp · West Africa

Q.01 · MEMBRANE FOULING

How do you prevent the MBR membranes from clogging?

The Siemens PLC automates a continuous scour aeration process beneath the membrane modules, physically shaking debris loose. It also runs an automatic backwash cycle every 12 minutes, and prompts a Chemical Enhanced Backwash (CEB) when the Transmembrane Pressure (TMP) reaches a set threshold.

Q.02 · SLUDGE HANDLING

What do we do with the sludge?

Because MBR operates at a very high MLSS (Mixed Liquor Suspended Solids) concentration, the sludge age is very long, resulting in a drastically lower sludge yield compared to traditional systems. The small amount of excess sludge is periodically pumped to an integrated holding tank for safe disposal.

Q.03 · RELOCATION

Can we move the plant to our next mining site?

Absolutely. The entire system is built into a standard ISO shipping container. Simply disconnect the inlet/outlet PVC pipes, unplug the main power cable, and lift it onto a flatbed truck. It is a 100% mobile asset.

Q.04 · OFF-GRID POWER

Our camp runs on diesel generators. Can the MBR handle power fluctuations?

Yes. We equip the main aeration blowers and suction pumps with premium Variable Frequency Drives (VFDs) and phase-protection relays. This ensures smooth motor startups without crashing your camp's micro-grid, and automatically safely shuts down the PLC during severe voltage drops.

Q.05 · GLOBAL LOGISTICS

How do you handle shipping for massive plants?

All systems are precision-engineered to fit inside standard 20ft or 40HQ shipping containers. No expensive flat-rack shipping is required. We save you massive ocean freight costs.

Q.06 · INSTALLATION

We lack local engineers. How do we install it?

100% Plug & Play. We finish all internal piping and electrical wiring in our China factory. Your local plumbers simply connect the raw water inlet and power supply. We also provide 24/7 video guidance.

MODULE 11 · PROOF OF LIFE · LIVE SCADA SNAPSHOT

UPDATED 60s AGO

BIO-TANK MLSS

8,450 mg/L

MEMBRANE TMP

-12.5 kPa

EFFLUENT TURBIDITY

0.2 NTU

DATA SOURCE: WANDONG NOC · Tag stream WD-WA-2023 · SHA-256 signed at minute boundary.
Available for client due-diligence walkthrough.

Core Systems Deployed in this Project:

MBR Packaged Sewage Plants Post-Treatment UV Sterilization

// Explore Similar Environments

-38°C Extreme Cold

Yukon Gold Mine ZLD

>20k mg/L COD

Desert Landfill Leachate

// MODULE 13 — INITIATE PROTOCOL

STOP ADAPTING TO EQUIPMENT.
LET IT ADAPT TO YOUR INDUSTRY.

Every sector faces unique discharge limits and spatial constraints. Don't settle for off-the-shelf compromises. Submit your exact parameters, and our engineering team will architect a custom, zero-civil-work solution guaranteed to perform.

INITIAL RESPONSE

1-ON-1

CUSTOM PROPOSAL

CONSULTATION FEE

// SECURE YOUR SUPPLY CHAIN

Request Firm Quote & 3D Layout

Receive a custom P&ID and Factory-Direct project budget within 48 hours.

WORK EMAIL *

CAPACITY *

RAW SOURCE

RAW WATER REPORT (TDS, BOD, ETC.)

DROP FILE OR CLICK

.PDF / .XLSX / .CSV / MAX 10MB

NOTES & TARGET OUTPUT STANDARD

AVG. RESPONSE: < 4 HRS · NDA AVAILABLE ON REQUEST

Zero civil work. 100% water reuse. Deep in the West African bush.