Abstract
Synthetically prepared wastewater originating from the H-acid (4-Amino-5-hydroxy-2,7-naphthalene disulfonic acid) manufacturing process was subjected to respirometric analysis for evaluating the level of achievable biodegradation in the presence of this commercially important azo dye precursor. For this purpose, H-acid was mixed with synthetic substrate having the same characteristics as sewage at a concentration and composition being typical for H-acid manufacturing wastewater. Experimental results indicated that H-acid was not biodegradable under activated sludge treatment conditions even after prolonged acclimation periods. The results were also confirmed by model evaluation of oxygen uptake rate profiles. H-acid also did not inhibit the biodegradation of synthetic sewage but accumulated as soluble inert COD in the treated wastewater.
| Original language | English |
|---|---|
| Pages (from-to) | 5589-5595 |
| Number of pages | 7 |
| Journal | Bioresource Technology |
| Volume | 102 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - May 2011 |
Funding
The authors acknowledge the financial support of the Scientific and Technological Research Council of Turkey (TUBITAK) under Project No. 108Y051 . The H-acid gift samples were provided by Eksoy Chemicals & Dyes.
| Funders | Funder number |
|---|---|
| TUBITAK | 108Y051 |
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu |
Keywords
- Activated sludge modeling
- Biodegradation kinetics
- H-acid
- Naphthalene sulfonates
- Oxygen uptake rate
