Peculiarity
High concentration of organic matter, with a wide variety of additives and complex chemical components.
Wastewater containing PVA slurry has a very low BOD/COD ratio.
Dyeing and printing wastewater features high and variable color intensity.
Large fluctuations in pH, as well as instability in both flow rate and water quality.
Contains sulfides, copper, chromium, fluorescent agents, and aniline compounds, contributing to high toxicity.
Q&A.
Toxic shocks from sulfides and heavy metals can easily inhibit nitrifying bacteria, leading to ammonia nitrogen exceedances.
Excessive use of synthetic sizing agents results in poorly biodegradable residues, causing CODcr to exceed discharge limits.
A low BOD/COD ratio slows sludge concentration buildup and reduces the system’s resistance to shock loads.
Solution
Case
