RESOURCES
Guides for buyers and operators
Practical articles written from the factory floor and from customer water samples: how much PAC to dose, how to read a specification, why a coagulant stops working, how to store it without losing performance, which PAM charge suits your sludge, and what a waterworks needs on paper before the first delivery. Every guide reflects the grades we produce in Zhengzhou: PAC at Al2O3 28% industrial (GB/T 22627-2022) and 29% drinking water (GB 15892-2020), PAM in anionic, cationic (10 - 60% charge) and non-ionic grades.
How Much Polyaluminium Chloride to Dose? A Practical PAC Dosing Guide
Typical PAC doses by application, the jar-test routine that finds your exact dose, the pH window, and how to convert between liquid and solid polyaluminium chloride. Written by a PAC manufacturer.
Read the guidePAC vs Alum vs Ferric Sulfate: Choosing a Coagulant for Water Treatment
A working comparison of polyaluminium chloride, aluminium sulfate (alum) and ferric sulfate: pH windows, alkalinity consumption, floc speed, sludge volume and cost logic - with a decision checklist.
Read the guideAnionic vs Cationic Polyacrylamide: Which One Does Your Process Need?
What anionic, cationic and non-ionic polyacrylamide actually do, which industries use which, how molecular weight and charge density change performance, and a quick way to test before you order.
Read the guideHow to Prepare a Polyacrylamide Solution Without Ruining It
Step-by-step preparation of polyacrylamide make-down solution: 0.1-0.3% concentration, low-shear mixing, 40-60 minutes dissolution plus aging, and the six most common field failures.
Read the guidePAC vs PAM: The Difference Between the Coagulant and the Flocculant
Polyaluminium chloride (PAC) neutralises charges; polyacrylamide (PAM) bridges particles into flocs. What each product does, where each is dosed, and how to tell which one your plant actually needs.
Read the guidePAC Specifications Explained: Al2O3, Basicity and How to Read a COA
What Al2O3 content, basicity, pH and water-insoluble matter mean on a polyaluminium chloride spec sheet, what a complete COA should contain, and how to compare two PAC quotations on a like-for-like basis.
Read the guidePAC Not Working? Seven Checks Before You Blame the Chemical
Small flocs, cloudy supernatant or a sudden drop in clarifier performance after switching to PAC: a diagnostic order covering dose, pH, alkalinity, mixing, raw water changes, product quality and dosing equipment.
Read the guideCationic Polyacrylamide for Sludge Dewatering: Charge, Dose and Cake Solids
How to select cationic polyacrylamide for sludge dewatering: charge density against sludge type, dose in kg per tonne of dry solids, matching the grade to belt presses, centrifuges and filter presses, and the bench test that predicts plant performance.
Read the guidePAC Shelf Life and Storage: Caking, Heat and the Mistakes That Cost Money
Practical storage guidance for polyaluminium chloride: shelf life by form, why powder cakes, how heat and freezing affect liquid PAC, incompatible materials, and what to do with a batch that has already hardened.
Read the guidePAC for Drinking Water: Grade, Standards and the Paperwork Buyers Should Ask For
The difference between industrial and drinking-water grade polyaluminium chloride, the standards that govern each market (GB 15892-2020, NSF/ANSI 60, EN 883), residual aluminium control, and the documents a waterworks should request before the first order.
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