Phosphorus removal in domestic wastewater treatment plant by calcined eggshell
Recovery of phosphorus (P) from wastewater is a topic of great interest. Besides being a non-renewable resource, P discharge in receiving waters can trigger algae blooms. The present study aimed to quantify the removal of P from two sites at a wastewater treatment plant using calcined eggshell (CES)...
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IWA Publishing
2021
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oai:doaj.org-article:063bdedba1894fda97aca2556dce43dc2021-11-06T11:18:32ZPhosphorus removal in domestic wastewater treatment plant by calcined eggshell0273-12231996-973210.2166/wst.2021.263https://doaj.org/article/063bdedba1894fda97aca2556dce43dc2021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/4/995https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Recovery of phosphorus (P) from wastewater is a topic of great interest. Besides being a non-renewable resource, P discharge in receiving waters can trigger algae blooms. The present study aimed to quantify the removal of P from two sites at a wastewater treatment plant using calcined eggshell (CES) as adsorbent. CES was prepared from raw shells calcined at 600 °C (CES600) and 800 °C (CES800). CES at 800 °C proved to be an efficient material for P removal. Efficiencies greater than 70% were achieved using CES800 concentrations of 0.1 g L−1 for synthetic sample, 0.3 g L−1 for preliminary treated wastewater and 20 g L−1 for supernatant from sludge anaerobic digester. The adsorption process was fast, occurring mostly in the first 30 min. Both Langmuir and Freundlich isotherms fitted the experimental data on adsorption. In kinetic experiments, a pseudo-second-order model fitted P adsorption from synthetic, preliminary effluent and digester supernatant. Thermogravimetric analysis showed a 54% eggshell mass loss at 800 °C. Calcination increased calcium and reduced carbon fractions in the eggshells, while increasing the surface area. HIGHLIGHTS Calcined eggshells can remove phosphorus from wastewater.; Eggshells calcined at 800 °C removed more than 70% of phosphorus.; Most phosphorus adsorption took place in the first 30 min.; The aggregate Ca–P has potential use in recycling valuable resources.;Rafael Renato FritzenAntônio Domingues BenettiIWA Publishingarticleanaerobic digester supernatanteggshell adsorbenteggshell waste reusephosphorus adsorptionrecycling wastewater nutrientEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 4, Pp 995-1010 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
anaerobic digester supernatant eggshell adsorbent eggshell waste reuse phosphorus adsorption recycling wastewater nutrient Environmental technology. Sanitary engineering TD1-1066 |
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anaerobic digester supernatant eggshell adsorbent eggshell waste reuse phosphorus adsorption recycling wastewater nutrient Environmental technology. Sanitary engineering TD1-1066 Rafael Renato Fritzen Antônio Domingues Benetti Phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| description |
Recovery of phosphorus (P) from wastewater is a topic of great interest. Besides being a non-renewable resource, P discharge in receiving waters can trigger algae blooms. The present study aimed to quantify the removal of P from two sites at a wastewater treatment plant using calcined eggshell (CES) as adsorbent. CES was prepared from raw shells calcined at 600 °C (CES600) and 800 °C (CES800). CES at 800 °C proved to be an efficient material for P removal. Efficiencies greater than 70% were achieved using CES800 concentrations of 0.1 g L−1 for synthetic sample, 0.3 g L−1 for preliminary treated wastewater and 20 g L−1 for supernatant from sludge anaerobic digester. The adsorption process was fast, occurring mostly in the first 30 min. Both Langmuir and Freundlich isotherms fitted the experimental data on adsorption. In kinetic experiments, a pseudo-second-order model fitted P adsorption from synthetic, preliminary effluent and digester supernatant. Thermogravimetric analysis showed a 54% eggshell mass loss at 800 °C. Calcination increased calcium and reduced carbon fractions in the eggshells, while increasing the surface area. HIGHLIGHTS
Calcined eggshells can remove phosphorus from wastewater.;
Eggshells calcined at 800 °C removed more than 70% of phosphorus.;
Most phosphorus adsorption took place in the first 30 min.;
The aggregate Ca–P has potential use in recycling valuable resources.; |
| format |
article |
| author |
Rafael Renato Fritzen Antônio Domingues Benetti |
| author_facet |
Rafael Renato Fritzen Antônio Domingues Benetti |
| author_sort |
Rafael Renato Fritzen |
| title |
Phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| title_short |
Phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| title_full |
Phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| title_fullStr |
Phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| title_full_unstemmed |
Phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| title_sort |
phosphorus removal in domestic wastewater treatment plant by calcined eggshell |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/063bdedba1894fda97aca2556dce43dc |
| work_keys_str_mv |
AT rafaelrenatofritzen phosphorusremovalindomesticwastewatertreatmentplantbycalcinedeggshell AT antoniodominguesbenetti phosphorusremovalindomesticwastewatertreatmentplantbycalcinedeggshell |
| _version_ |
1718443711722946560 |