Abstract
Unplanted upflow filters, which were filled with different filter media (natural zeolite, blast furnace granulated slag, ceramsite, and walnut shells). were operated to assess their nutrient removal performances. Different preprocessing methods involving aerobic and anaerobic sledges were applied to the filters to accelerate the treatment processes. The results indicated that preprocessing enhanced the soluble chemical oxygen demand (SCOD) removal, but bad no obvious influence on the total nitrogen (TV) and total phosphorus (TP) removal efficiencies. Filters containing blast furnace granulated slag were independent with respect to SCOD loading rate variations in the range between 100 and 900 mg/d, A linear velocity equation was used to determine the nutrient removal velocities of blast furnace granulated slag-filled filters. The removal velocities were rapid, and highest for TP and lowest for TN. Conquered with other filters, blast furnace granulated slag-filled performed best concerning nutrient removal and retention. Walnut shell-filled fitters performed wont. (C) 2008 American Institute of Chemical Engineers Environ Prog, 28: 192-201, 2009
| Original language | English |
|---|---|
| Pages (from-to) | 192-201 |
| Number of pages | 10 |
| Journal | Environmental Progress and Sustainable Energy |
| Volume | 28 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jul 2009 |
Keywords / Materials (for Non-textual outputs)
- aggregate
- blast furnace granulated slag
- soluble chemical oxygen demand
- nutrient removal
- removal velocity
- FLOW CONSTRUCTED WETLANDS
- WASTE-WATER TREATMENT
- BLAST-FURNACE SLAG
- PHOSPHATE REMOVAL
- START-UP
- POLLUTION
- ZEOLITE
- REACTOR
- STABILIZATION
- PHOSPHORUS