Polymer Barrier Coatings and Pulpability Test Standards
Polymer barrier paperboard compliance requires passing 0.15mm laboratory slot screening with under 15 percent reject mass to prevent EPR fee penalties.
Total Organic Carbon COD
Effluent Load
Quantitative measurement of dissolved organic compounds and chemically oxidizable substances in paper mill process water determines environmental discharge compliance. Monitoring total organic carbon COD quantifies both non-biodegradable and biodegradable organic chemical loads released during pulping and repulping operations. Laboratory analysis utilizes strong chemical oxidants or high-temperature combustion to break down organic matter into carbon dioxide and water.
High organic loads increase wastewater treatment costs and indicate chemical loss or starch leaching from recycled paper feedstocks.
Chemical Demand
Testing protocols require filtered or unfiltered water samples to differentiate between suspended organic particulates and dissolved chemical compounds. Measuring total organic carbon COD during repulping trials reveals how much soluble binders and starches leach from barrier-coated paperboards into process water. High chemical oxidation demand in white water loops leads to biological slime growth and foam generation in paper mills.
Closed-loop water systems concentrate dissolved organic contaminants, necessitating chemical treatment or membrane filtration to maintain process water quality.
Process Contamination
Environmental discharge limits establish maximum concentration boundaries for paper mill effluents. High organic leaching scores during laboratory recyclability trials cause packaging materials to fail environmental compatibility standards. Water testing stops when organic loading exceeds wastewater plant treatment capacity or violates regulatory discharge thresholds.
Effective effluent monitoring ensures compliant mill water circuit operations.