9 research outputs found
A study on development of indigenous integrated microwave-ultraviolet reactor for degradation of <i style="mso-bidi-font-style:normal">p</i>-cresol in aqueous solution
No full text458-462An integrated microwave-ultraviolet
(MW-UV) reactor has been developed indigenously and used for the degradation of
aqueous p-cresol. The p-cresol degradation is
carried out in six phases, namely (i) microwave irradiation (MW),
(ii) photodegradation with UV light (UV), (iii) simultaneous microwave and
ultraviolet radiations (MW-UV), (iv) microwave in presence of TiO2
(MW-TiO2), (v) photodegradation by UV and TiO2 (UV-TiO2),
and (vi) simultaneous MW and UV irradiations in presence of TiO2
(MW-UV-TiO2). T<span style="mso-bidi-language:
TA" lang="EN-GB">he order of the degradation efficiency is found to be
MW-UV-TiO2>UV-TiO2>MW-TiO2>UV-MW>UV>MW.
The complete degradation of p-cresol is
obtained by
MW-UV-TiO2 and it is three-fold economical
in catalyst requirement than UV-TiO2. The degradation of p-cresol followed pseudo first order
reaction and the reaction rate (k) for MW-UV-TiO2 is found to be 3
times greater than that for UV-TiO2. The MW-UV-TiO2 is also
2.3 times efficient in the removal of total organic carbon than UV-TiO2.
It is also observed that the unit operating cost of conventional UV-TiO2
and MW-UV-TiO2 is almost same.
</span
Effect of Substrate to Inoculum ratio (S/I) on Liquefaction and Biomethanation of Fish Market Waste
No full text699-702This study presents effect of pre-treatment using anaerobic microbial inoculum on solubilisation of
fish waste. Solubilization of fish waste in pre- treatment using anaerobic
inoculum, 2.3 times was more when compared with control. From biochemical
methane potential (BMP) studies, FW with pre- treatment using anaerobic
inoculums, generated 0.36 m3 / kg VSd which was 1.3
times more than the control. Similarly methane generation of 0.29 m3 / kg VSa, it was 0.7 times lower than that reported in
literature
Influence of Inoculum on Nutrient removal and Biopolymers production from Fish waste
No full text707-709This
study presents influence of anaerobic inoculum on nutrient removal during
digestion of the fish waste. Nutrient removal during digestion of fish waste
was 83.3 % for the substrate / Inoculum (S/I) ratio of 10:2 more when compared
with control without inoculum. Digestate treated with aerobic inoculum results
in biopolymer production of 30 ml for the S/I of 10:1 and was separated using
non- polar solvent (chloroform), generated polymer was 6 times higher than the
control without inoculum
Enhancement of biomethanization by pretreatment of limed fleshingsfrom tanneries
No full text711-716This study presents effect of
pretreatment using anaerobic inoculum (PT-AI) and thermo-chemical pretreatment
(PT-TC) on
solubilization of limed
fleshings (LFs). Solubilization of LF in PT-AI (93.3%) was more than PT-TC.
From biochemical
methane potential (BMP)
studies, LFs with PT-AI generated 0.16 m3 of CH4 /kg CODtotal added, which was 2.7 and 1.5 times
more than LFs pretreated with NaOH and KOH respectively
Degradation of phenol and <i style="">m</i>-cresol in aqueous solutions using indigenously developed microwave-ultraviolet reactor
No full text71-76A MW-UV reactor was developed indigenously for
degradation of aqueous phenol and m-cresol (degradation efficiency, MW-UV-TiO2 >
UV-TiO2 > MW-TiO2 > MW-UV > UV > MW). Maximum
degradation of phenol (85%) and m-cresol (92%) by MW-UV-TiO2 and MW-UV-TiO2 was three folds faster in
reaction time and catalyst requirement than UV-TiO2 method.
Degradation of phenol and m-cresol in
reactor followed pseudo first order reaction and reaction rate (k) for
MW-UV-TiO2 was 2.2 times greater than UV-TiO2 and greater
(17 times for phenol and 22 times for m-cresol)
than other processes. MW-UV-TiO2 was 2.3 times more efficient in removal of TOC than conventional photocatalytic method
Bioethanol Production from Paper Fibre Residue Using Diluted Alkali Hydrolysis and the Fermentation Process
Get PDFThe state of art for the bioethanol production from paper fibre residue using diluted alkali hydrolysis and fermentation processes was evaluated. Hydrolysis of paper fibre residue with diluted sodium hydroxide at various time period, temperature and concentration were investigated. The paper fibre residue was pre-steamed, impregnated with diluted NaOH (0 to 25%) and subsequently hydrolyzed in a reactor at temperatures that ranged between 30 to 50 oC, for reaction time between 30 minutes to 150 minutes. The highest yield of monosaccharide (indicating the efficient hydrolysis of cellulose and hemi cellulose) was found at a temperature of 35 oC for a reaction time of 90 minutes. Fermentability of hemicelluloses hydrolysate was tested using monosaccharide fermenting microorganism Penicillium chrysogenum and Saccharomyces cereviacea. The fermentability of the hydrolysate decreased strongly for hydrolysate produced at temperature higher than 50 oC. The ethanol concentration of monosaccharide hydrolysate was found to be 34.06 g/L and the ethanol yield was 0.097 g/g
Effect of recirculation rate on anaerobic treatment of fleshing using UASB reactor with recovery of energy
No full text790-793This study presents performance of upflow anaerobic sludge blanket (UASB) reactor in treating liquefied fleshings (LFs)with tannery wastewater (TWW) using liquefaction reactor (LR). With increase in recirculation rate, methane production increasedin LR than in UASB reactor due to methanogenic bacteria in LR. UASB reactor with continuous feeding of LFs andTWW resulted with cumulative methane in UASB reactor (128 l) and LR (145 l)
Groundwater modeling and demarcation of groundwater protection zones for Tirupur Basin – A case study
No full textBopyrid isopods parasitizing on the cultured fresh water prawn, macrobrachium malcolmsonii in South India
Get PDFThe bopyrid isopods are common in wild Macrobrachium
spp. but not common in aquaculture condition.
This is the first study that reports the parasitizing of bopyrid isopods on the cultured M. malcolmsonii. Bopyrid isopod (Probopyrus buitendijki) was identified in the branchial cavities of the freshwater prawn, M.malcolmsonii fromgrow-out culture pond at Kuriyamangalam, India. Macrobrachium malcolmsonii is a new host for P. buitendijki. A total of 1323 M. malcolmsonii were checked for this study. The overall prevalence of the parasitic infestation was reached 46.2 %. The parasitic infection was higher in female (83 %) than in male (3.4 %). Highest prevalence of infestation was found in the median size group (7–8 cm) (58.7 %). Infected females were not berried unlike uninfected prawns. The parasites cause infertility and does not found any organ deformities due to the infestation. The parasite was inversely attached in the gill chamber with no lesion on the gill but the infected branchial chamber became bulged
