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Welcome to the Zappa-Stewart Superabsorbent Blog

SAPs in Food & Beverage: Cleanup, Spill Kits & Packaging

Washdowns, ingredient spills, and changeovers add time and slip hazards. Superabsorbent polymers (SAPs) capture and immobilize liquids quickly, making cleanup faster and safer while supporting housekeeping SOPs. SAPs also support spill kits and certain packaging absorbents where permitted.

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Topics: SAP, SAP Applications, HDD, ZapOut, Tunneling

Superabsorbent Polymers (SAPs): What They Are and How They Work, FAQ's


Superabsorbent polymers (SAPs) rapidly immobilize free liquid by converting it into a stable gel, helping sites cut handling/disposal costs, reduce risk, and meet landfill “no free liquids” requirements. Below you’ll find quick answers to the most common questions we get about SAPs—plus where to use them and how to validate performance in the field.

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Topics: SAP, SAP Applications, HDD, ZapOut, Tunneling

How SAPs Cut Coal Ash Disposal Costs by Over 20%


Superabsorbent polymers (SAPs) cut coal-ash (CCR) disposal costs by 20%+ because they work at ultra-low dosage rates (often ~0.3–0.5%), solidify in 15–30 minutes, and don’t add bulk—so you save on labor, trucking, and tipping fees. Unlike lime/cement, SAPs are inert and non-corrosive, avoid high-pH waste profile changes, and keep projects compliant with EPA Method 9095B Paint Filter requirements—even in saturated ash.

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Topics: SAP, SAP Applications, HDD, ZapOut, Tunneling

Reducing the Cost of Solidifying Wet Spoils — A Better Way to Manage Disposal of HDD (Drilling) and Hydro-Excavation Mud

Managing drilling fluid waste from HDD and hydrovac work shouldn’t drain time, money, and crews. Traditional absorbents like sawdust or lime add bulk, slow you down, and still risk free-liquid failures at the landfill. Zappa-Stewart superabsorbent polymers (SAPs) flip that script—solidifying mud in 15–30 minutes, cutting added material to a fraction of the usual dose, shrinking pit volumes, and helping loads pass Paint Filter so you can haul sooner, safer, and at lower total cost.

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Topics: SAP, SAP Applications, HDD, ZapOut, Tunneling

The Environmental Benefits of Superabsorbent Polymers in Tunneling, Directional Drilling, and Liquid Waste Remediation

Reducing environmental impact is a growing priority in directional drilling, tunneling, and heavy construction. One innovative solution leading the way is superabsorbent polymers (SAPs) — sustainable, high-performance materials that solidify directional drilling mud and tunnel muck while dramatically lowering greenhouse gas emissions compared to traditional materials like Portland cement and quicklime.

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Topics: SAP, SAP Applications, HDD, ZapOut, Tunneling

The Role of Super Absorbent Polymers (SAP) in Tunneling Operations

Tunneling has emerged as the least disruptive and most efficient methodology for rail and vehicle transportation, clean water and wastewater security and conservation as well as security for the movement of chemicals and hydrocarbon through sensitive environments.

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Topics: SAP, SAP Applications, HDD, ZapOut, Tunneling

Infection Control in the New COVID Age

Coronavirus disease 2019 (COVID-19) and its cause, SARS-CoV-2, have taken a solid grip on both the US and the world, causing significant loss of life and economic destruction. The public in general now has a heightened awareness around not only this current coronavirus, but the potential for future viruses and pandemics as well. This only adds to the pressure hospitals and other healthcare centers have been under to reduce Hospital Acquired Infections (HAIs), which, according to the Centers for Disease Control and Prevention (CDC), affect roughly 1 in every 31 hospital patients across the United States.

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Topics: Covid-19, Infectious Viruses, Infection Control, ZapOut, SAP for Medical Applications