The 2026 Compliance Landscape Landfill operators entered 2026 under a tighter rule set. The 4 ppt MCL for PFOA and PFOS under the Safe Drinking Water Act, finalized in 2024 and now on a compliance timeline that runs to the end of the decade, is the operating baseline for downstream drinking water systems that receive…
Why Instrument the Reinjection Line at All? Leachate reinjection — where collected leachate is pumped back into the waste mass to accelerate stabilization or manage volume — is not a new technique. What has changed is the compliance framing around it. PFOA and PFOS are now designated hazardous substances under CERCLA, state agencies are taking…
Chapter One: Capture For most of the last decade, PFAS treatment meant capture. Granular activated carbon columns adsorbed short and medium-chain PFAS from municipal drinking water. Ion exchange resins targeted specific PFAS species with higher selectivity. Reverse osmosis and nanofiltration barriers rejected PFAS by size and charge. All three techniques share a common structural feature:…
Why Suspended Solids Matters at Every Stage A landfill leachate treatment train produces suspended solids challenges at essentially every stage: Raw leachate arrival: highly variable TSS, sometimes as high as 3,000 mg/L after a heavy rainfall event. Equalization tank: mixing and settling combine to produce a stratified TSS profile. DAF (dissolved air flotation): designed to…
Why the Two-Step Architecture Changed the Sourcing Question For most of the last decade, PFAS treatment was a single-step problem: adsorb the compounds on GAC or ion-exchange resin, incinerate the spent media, and file the compliance paperwork. That approach is now widely considered inadequate for high-concentration streams like landfill leachate, because it displaces rather than…
title: “Inside a PEM Water Circulation Loop: Where Each Sensor Belongs on the P&ID, with Shanghai ChiMay” description: “A technical walkthrough of PEM electrolyzer water circulation, showing exactly where conductivity, DO, pH, flow and turbidity sensors sit on the P&ID, with commissioning notes from Shanghai ChiMay.” type: technical-introduction theme: Green Hydrogen & Electrolyzer Feedwater date:…
