Pollutant
removal performance of wetland Influent Sampling ports Typha augustifolia
Research highlights (Complete
publication list) Thesis guidance
Constructed wetland based treatment
1. A
planted horizontal subsurface flow constructed wetland was used for removals of
phenol, organics, thiocyanate and nitrogen. Typha angustifolia
was used as the plant. Phenol and COD removals were 99% and 93%, respectively. Thiocyanate removal was 91% and it converted to sulphate. Higher ambient temperature improved pollutant
removals. It is published in this journal:
ü Christy
Benny and Saswati Chakraborty, Continuous removals of
phenol, organics, thiocyanate and nitrogen in
horizontal subsurface flow constructed wetland. Journal of Water Process
Engineering, 33 (2020), 101099 (Elsevier, Impact factor = 3.173).
2. In
another study a horizontal subsurface flow constructed wetland was used for
simultaneous COD and nitrogen removals by step-feeding and intermittent
aeration using Typha aungustifolia.
The publication from this work is given below:
ü Sagar Patil and Saswati Chakraborty (2017). Effects of
step-feeding and intermittent aeration on organics and nitrogen removal in a
horizontal subsurface flow constructed wetland. J. Environmental Science and
Health Part A, 52(4), 403-412 (Taylor and Francis, IF = 1.425).
Aerobic granular reactor
1.
Oily wastewater treatment in aerobic granular
reactor
Three
inoculum were used for development of granular sludge and subsequent emulsified
diesel removal. Micrococcus aloeverae strain
showed maximum oil removal of 61% from influent oil concentration of 310 mg/L.
Stability and restoration of granular sludge were also studied. This work is
published in the following Elsevier Journal:
ü Sayanti Ghosh and Saswati
Chakraborty, Influence
of inoculum variation on formation and stability of aerobic granules in oily
wastewater treatment Journal of Environmental Management, 248
(2019) (Elsevier, IF = 4.865).
2.
Aerobic granular reactor for phenol, thiocyanate and ammonia removal
Aerobic
granular reactor is used for treatment of phenol, ammonia and nitrogen
containing wastewater. Phenol was the only growth supporting substrate.
Granules had maximum diameter of 2.9 mm, sludge volume index of 35 mL/g total
solids and volatile solids of 4 g/L. We varied cycle time of the reactor, upflow velocity and air flow rate. Phenol and COD removals
were complete. Three papers are published from this work:
ü Sachin Kumar Tomar, Saswati Chakraborty (2019). Comparison of rapid granulation
developed from the same industrial sludge with two different substrates.
International Biodeterioration and Biodegradation,
142, 218-226 (Elsevier, IF= 2.962).
ü Sachin Kumar Tomar, Saswati Chakraborty (2018). Effect of air flow rate on
development of aerobic granules, biomass activity and nitrification efficiency
for treating phenol, thiocyanae and ammonia. Journal
of Environmental Management, 219, 178-188 (Elsevier, IF = 4.01)
ü Sachin Kumar Tomar, Saswati Chakraborty (2018). Characteristics of aerobic
granules treating phenol and ammonia at different cycle time and upflow liquid velocity. International Biodeterioration
and Biodegradation, 127, 113-123 (Elsevier, IF= 2.962).
Sequential biological reactors from hydrocarbon,
sulphide and nitrogen rich wastewater treatment
Sequential
anoxic- aerobic moving bed reactors are used for biological treatment of
synthetic refinery wastewater having hydrocarbons, phenol, sulphide
and nitrogen. Refinery wastewater contains large amounts of sulphide.
Sulphide present in the wastewater was converted to
elemental sulphur (S0) and recovered as
value added product. Almost 50-60% of influent sulphide
was recovered as elemental sulphur solid in the
anoxic reactor along with removal of most of the pollutants. Four papers are
published in international journals from this work:
ü Subrat Kumar Mallick
and Saswati Chakraborty, Varied infeed
inorganics and organics for the assimilation of aqueous petrochemical products
in anoxic fed-batch reactors: Maximizing precipitation of S0.
Separation and Purification Technology, 219, 268-280 (Elsevier, IF = 3.927).
ü Subrat Kumar Mallick
and Saswati Chakraborty, Bioremediation
of wastewater from automobile service station in anoxic- aerobic sequential
reactors and microbial analysis. Chemical Engineering Journal, 361, 982-989 (2019)
(Elsevier, IF = 6.735).
ü Subrat Kumar Mallick
and Saswati Chakraborty, Bioremediation of hydrocarbon containing wastewater in
anoxic-aerobic sequential reactors. Environmental Technology (accepted), (Taylor and Francis, IF = 1.76).
ü
Subrat Kumar Mallick
and Saswati Chakraborty (2017). Treatment of
synthetic refinery wastewater in anoxic – aerobic sequential moving bed
reactors and sulphur recovery. J. Environmental
Science and Health, Part A, 52(13), 1257-1268 (Taylor and Francis, IF = 1.425).
Removal of heavy metals and dyes using amine based
functionalized polymers
We
synthesized amine based polymers, aniline formaldehyde condensate and polyaniline and used as adsorbents for removals of copper,
chromium [Cr(VI) and Cr(III)] from wastewater. Polymer
was also used for removal of acid dyes like Acid orange 8 and Acid violet 7.
Two publications are achieved recently from this work:
ü Praisy Terangpi, Saswati Chakraborty and
Manabendra Ray (article accepted). Improved removal
of hexavalent chromium from 10 mg/L solution by
new micron sized polymer clusters of aniline formaldehyde condensate. Chemical
Engineering Journal, (Elsevier, IF =6.21).
ü Praisy Terangpi and Saswati Chakraborty. Adsorption
kinetics and equilibrium studies for removal of acid azo
dyes by aniline formaldehyde condensate. Applied Water Science, 7, 3661-3671
(Springer).
Sequential biological treatment of industrial wastewater
We have used sequential moving bed reactor system
for removal of toxic pollutants like phenol, ammonia, thiocyanate,
pyridine from wastewater in fed batch type reactors by indigenous cultures. Six
publications are obtained from this work.
ü Biju Prava Sahariah,
J. Anandkumar and Saswati
Chakraborty (2018). Pyridine influence on sequential anaerobic-anoxic- aerobic
FMBR system for phenol, thiocyanate and ammonia
removal. Environmental Technology 39(14), 1786-1794 (Taylor and Francis, IF
=1.76).
ü Biju Prava Sahariah,
J. Anandkumar and Saswati
Chakraborty (2018). Stability of continuous and fed batch sequential
anaerobic-anoxic- aerobic moving bed bioreactor systems at phenol shock load
application. Environmental Technology, 39(15), 1898-1907 (Taylor and Francis,
(IF =1.76).
ü Biju P Sahariah, Saswati
Chakraborty (2011). Kinetic analysis of phenol, thiocyanate
and ammonia-nitrogen removals in an anaerobic-anoxic-aerobic moving bed
bioreactor system. Journal of Hazardous materials, 190(1-3), 260-267.
ü
Biju prava Sahariah
and Saswati Chakraborty. (2013) Effect of cycle and
fill time on performance of sequestial
anaerobic-anoxic-aerobic fed batch moving bed reactor. Environmental
Technology, 34(1-4):245-56.
ü
Biju Prava Sahariah
and Saswati Chakraborty. (2013) Performance of anerobic-anoxic-aerobic batch fed moving bed reactor at
varying phenol feed concentrations and hydraulic retention time. Clean
Technology and Environmental Policy, 15 (2), 225-233.
ü
Biju Prava Sahariah
and Saswati Chakraborty. (2012) Effect of feed
concentration and hydraulic retention time on removal of phenol, thiocyanate and nitrate – nitrogen in anoxic fed batch
moving bed reactor. Toxicological and Environmental Chemistry, 94 (9)
1629-1645.