Immobilization of microorganisms in activated zeolite beads and alkaline pretreated straws for ammonium-nitrogen removal from urban river water
| Autor: | Eldon R. Rene, Qiuhong Li, Van Tai Tang, Afshin Maleki, Chau Thi Da, Shishir Kumar Behera, Nguyen Tan Phong |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Environmental Engineering
Chemistry Nitrogen Microorganism ammonium-nitrogen removal microbial immobilization River water Environmental technology. Sanitary engineering cod removal Rivers Environmental chemistry Ammonium Compounds Denitrification Zeolites activated zeolite bead alkaline pretreated straw Zeolite Ammonium nitrogen TD1-1066 Water Science and Technology |
| Zdroj: | Water Science and Technology, Vol 85, Iss 1, Pp 63-76 (2022) |
| ISSN: | 1996-9732 0273-1223 |
| Popis: | The non-treated wastewater from residential areas contains high concentrations of ammonium-nitrogen (NH4+-N). When discharged into the drainage water system, it deteriorates the water quality in urban rivers. This study used two types of materials to form eco-bags, using activated zeolite bead (AZB) and alkaline pretreated straw (APS), in geotextile bags for easy recovery and reuse. The AZB and APS provided the breeding habitat for the microorganisms that promoted biofilm formation on their surface. The immobilization of engineered denitrification microorganisms facilitated the removal of NH4+-N from the urban river water. The NH4+-N removal in the AZB and APS bags were in the range of 64–73%, and 56–61%, respectively, while the chemical oxygen demand (COD) removal in the AZB and APS bags ranged from 33–36%, and 30–31%, respectively. In addition, as evident from DNA and microbial community analysis, the microorganisms demonstrated a greater proclivity to grow and proliferate on the surface of AZB and APS and improved the water quality of urban rivers. HIGHLIGHTS Activated zeolite bead (AZB) and alkaline pretreated straw (APS) were used for the immobilization of microorganism.; Eco-bags prepared using AZB and APS in geotextile bags facilitated easy recovery and reuse.; Engineered denitrification bacteria were used to improve the NH4+-N removal capacity.; Microorganism diversity was investigated to substantiate the water quality improvement ability of AZB and APS. |
| Databáze: | OpenAIRE |
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