Sequential type batch reactor (SBTR): A novel advancement in adsorption system for removal of pollutant from drinking water
- Indian Institute of Technology Kharagpur, Indian Institute of Technology Kharagpur, School of Water Resources, Kharagpur, India (psghosal@swr.iitkgp.ac.in)
The adsorptive removal of pollutant is a widely applicable process in environmental engineering. The major issue associated with many promising adsorbents is their low hydraulic conductivity, which renders their applicability in column based field level operation despite of their proved efficacy in batch mode in the laboratory. In this context, development of a novel sequential batch type reactor (SBTR) in the field of adsorption has shown its applicability in continuous operation using the benefits of the adsorbent characteristics in batch mode (Indian Patent No: 416891).
In the present study, SBTR was applied on fluoride removal from water by two adsorbents, viz. calcined Ca-Al-(NO3) layered double hydroxide and Alumina Olivine Composite. Those adsorbents could not be used for column study due to their fine particle size and low hydraulic conductivity, although their adsorption capacity was found high in batch study. In the continuous operation, the assessment of time for filling, batch scale adsorption reaction, separation of adsorbent by settling, collection of treated water and taking out of the adsorbent from reactor is computed from the batch scale preliminary studies. The cycle of fill (4 h), batch adsorption reaction (4 h) and separation, collection etc. (4 h) was considered. Three numbers of the tank are taken in parallel. The adsorption studies in the SBTR were conducted for various adsorbent dose, concentration, time, agitation rate, etc. The reactor can bring down the fluoride from 10 mg/L to below the standard at an agitation rate of 500 rpm and an adsorbent dose of 1.5 and 5 g/L for calcined Ca-Al-(NO3) LDH and AOC, respectively. SBTR exhibited its promising opportunity in continuous operation universally in field irrespective of the size and characteristics of the adsorbent. The present work brings this type of reactor for the first time in the field of adsorption with significant advancement in water treatment.
Keywords Continuous reactor, Batch Study, Sequencial operation, Water treatment, Adsorbent
How to cite: Ghosal, P. S. and Sahu, S.: Sequential type batch reactor (SBTR): A novel advancement in adsorption system for removal of pollutant from drinking water, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-17636, https://doi.org/10.5194/egusphere-egu24-17636, 2024.
