Advances in Wastewater Treatment using Zeolite and Anammox

Dear Colleagues,

During the past two decades, new approaches to nitrogen treatment methods have developed in the laboratory and some tested in pilot-scale treatment plants; two of the more promising methods include use of zeolite aggregates and anammox bacteria in treatment reactors.  Zeolites are a relatively commonly found deposit around the world whose aggregates have relatively low density, some internal porosity and unusually large cation-exchange capacity (CEC) for the type of mineral.  Some research has explored use of the zeolite aggregates as an ammonium adsorption substrate.  Anammox bacteria were discovered in wastewater treatment plant (WWTP) anaerobic digesters and in several marine environments.  They were key towards closing nitrogen balance estimates in WWTP and estuary-marine studies and found to readily convert ammonia ions using nitrite to nitrogen gas.  Several partial-nitritation wastewater treatment reactors have been developed that use anammox bacteria to facilitate nitrogen removal.  What may be limiting broader application of these methods at full-scale WWTPs to some degree is the limited availability of the operational knowledge necessary to maintain these reactors under a range of wastewater conditions (e.g. temperatures, and nitrogen, TSS and COD loading).  This Special Issue invites authors to provide information applicable to operation of pilot-scale treatment ‘reactors’ employing zeolites, or other effective substrates, and/or anammox bacteria in the treatment process.  In addition, we are seeking articles that demonstrate improved energy efficiency per unit of nitrogen removal from wastewater and decreased greenhouse gas emmissions.

Prof. Mark E. Grismer
Guest Editor

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