Leachate Treatment Tanks: Process Vessels for Landfill and Biogas Leachate
Created on Today
Leachate Treatment Tanks: Process Vessels for Landfill and Biogas Leachate
Landfill leachate is one of the hardest wastewaters to treat: COD up to tens of thousands of mg/L, ammonia, heavy metals and chemistry that changes as the landfill ages. The tanks hosting its treatment must be as aggressive as the fluid itself.
A leachate treatment tank is a process vessel — UASB/EGSB reactor, aerobic basin, or storage buffer — engineered for high-strength landfill or biogas leachate. Bolted GFS construction with pH 1–14 fused enamel, per AWWA D103 and ISO 28765, delivers 30+ years in this corrosive duty.
What Does Leachate Treatment Require from Its Tanks?
High-COD tolerance: leachate COD typically runs 5,000–60,000 mg/L; anaerobic reactors (UASB/EGSB) handle the bulk load.
Chemistry swings: pH ranges from acidic young leachate to alkaline old leachate — full-range corrosion resistance is mandatory.
Gas management: anaerobic tanks capture biogas (60–70% CH4) with gas-tight roofs and safety systems.
Process flexibility: AO/A2O, MBR and polishing configurations add aerobic tanks and clarifiers.
How Are Leachate Treatment Tanks Engineered?
Reactor design: UASB/EGSB tanks with internal settlers, gas collection and corrosion-proof GFS shells.
Aeration basins: open or covered tanks with diffusers for nitrification and BOD polishing.
Buffer and storage: equalization and holding tanks smooth flow into treatment.
Standards: AWWA D103 structural, ISO 28765 enamel, plus local environmental and gas-safety codes.
Why GFS Is the Default for Leachate Service
Full-range chemistry: pH 1–14 fused enamel covers young acidic and old alkaline leachate without liner changes.
Gas-zone defense: H2S condensate is neutralized by the same inert layer protecting the liquid zone.
Verified quality: 1500V DC holiday testing of every panel documents the pinhole-free barrier.
Scale: leachate tanks range from small buffers to 10,392 m³+ installations, expandable in phases.
Comparative Matrix: Leachate Treatment Tank Materials
Evaluation Parameter | GFS Enamel Steel | Concrete + Liner | Welded Coated Steel | HDPE |
pH range resistance | pH 1–14 | Liner-dependent | Coating-dependent | Good |
H2S gas-zone resistance | Excellent | Poor | Moderate | Good |
High-COD abrasion | 6.0 Mohs | Good | Poor | Moderate |
Service life | 30+ years | 20–30 years | 10–20 years | 10–15 years |
Expansion flexibility | Yes | No | No | Limited |
Leachate treatment tanks must match the fluid's aggression — bolted GFS enamel delivers the pH 1–14 chemistry resistance, H2S defense and documented 1500V integrity that high-COD leachate service demands over 30+ years.
Frequently Asked Questions (FAQ)
Q1: What is a leachate treatment tank?
A process vessel for high-strength landfill or biogas leachate — UASB/EGSB reactors, aerobic basins or storage buffers — engineered to AWWA D103 with pH 1–14 GFS enamel for 30+ year service.
Q2: Why is leachate so difficult to treat and store?
Leachate carries COD of 5,000–60,000 mg/L, ammonia, heavy metals and unstable pH, plus H2S in gas zones. Fused enamel's pH 1–14 range and 6.0 Mohs hardness handle the chemistry and abrasion.
Q3: Which reactor types are used for leachate?
Anaerobic UASB/EGSB reactors take the bulk COD load and produce biogas (60–70% CH4), followed by aerobic basins (AO/A2O, MBR) for nitrification and polishing — all viable as bolted GFS tanks.
Q4: What quality evidence should leachate tanks carry?
1500V DC holiday-test records per panel, coating-thickness and adhesion reports, and ISO 28765 compliance — the documented pinhole-free barrier that leachate chemistry demands.
WhatsApp