Abstract
This paper is concerned with the performance of relatively new kinds of pre-polymerised inorganic coagulants, poly-alumino-iron-sulphate (PAFS) and polyferric sulphate (PFS). Laboratory experiments were undertaken to evaluate the PAFS and PFS, in comparison with conventional coagulants such as ferric sulphate (FS) and aluminium sulphate (AS), for the coagulation of algal-type model waters and a lowland surface water containing algae and natural organic matter (NOM). Experimental results demonstrated that under the conditions studied, the performance of pre-polymerised coagulants were consistently superior to conventional coagulants (i.e., FS and AS). This is attributed to the presence of a range of pre-formed polymerised species. The coagulation mechanism of PAFS and PFS has been discussed in the paper.
| Original language | English |
|---|---|
| Pages (from-to) | 121-128 |
| Number of pages | 8 |
| Journal | Water Science and Technology |
| Volume | 37 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jan 1998 |
| Externally published | Yes |
| Event | 1997 1st IAWQ-IWSA Joint Specialist Conference on Reservoir Management and Water Supply - An Integrated System - Prague, Czech Republic Duration: 19 May 1997 → 23 May 1997 |
Keywords
- Algae
- coagulation
- fractionation
- humic/non-humic substances
- molecular size (MS)
- natural organic matter (NOM)
- poly-aluminio-iron sulphate (PAFS)
- polyferric sulphate (PFS)
- pre-polymerised coagulants
ASJC Scopus subject areas
- Environmental Engineering
- Water Science and Technology