EMCB-ENVIS Node ENVIRONMENTAL BIOTECHNOLOGY

EMCB-ENVIS Centre
conventional extraction analysis. The degree of enrichment and the bioavailable metal
concentrations in the sediments of the south portion of Mazatlán Bay is discussed. The potential
ability of C. iridescens as a biomonitor of metallic pollutants is postulated.
M. Topashka- Ancheva, R. Metcheva, S. Teodorova. (Institute of Zoology, Bulgarian
Academy of Sciences, Bd.Tzar Osvoboditel 1, Sofia 1000, Bulgaria. Institute for Nuclear
Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko shaussee,
Sofia 1784, Bulgaria). Bioaccumulation and damaging action of polymetal industrial
dust on laboratory mice Mus musculus alba II. Genetic, cell, and metabolic
disturbances. Environmental Research, 92(2) (2003), 152-160.
An ecologo–toxicological experiment was carried out with laboratory mice Mus musculus alba
of the inbred line BALB/c. The experimental animals (male and female) were exposed for 120
days to polymetal industrial dust containing zinc, copper, lead, and cadmium, which was mixed
with conventional animal food. Chromosome aberration frequency and pathological changes in
hematological indices, oxygen consumption, body temperature, and body weight were studied in
the context of heavy metal bioaccumulation and interactions. Samples for analyses were taken on
days 15, 40, 60, and 90. An increased frequency of chromosome aberrations (up to 22%), leadinduced
anemia, and significant decreases in body temperature were observed. A strong
correlation between hemoglobin content and oxygen consumption (O2/ g h) was established. An
increase in hematocrit, accompanied by a loss of body weight after day 60, suggests dehydration
resulting from lead and cadmium poisoning.
Md. Zahangir Alam, A. Fakhru'l-Razia, Abul H. Mollaa. (Department of Chemical and
Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM
Serdang, Selangor DE, Malaysia. Department of Biotechnology Engineering, Faculty of
Engineering, International Islamic University Malaysia, Jalan Gombak, 53100, Kuala
Lumpur, Malaysia). Biosolids accumulation and biodegradation of domestic
wastewater treatment plant sludge by developed liquid state bioconversion
process using a batch fermenter. Water Research, 37(16) (2003), 3967-3977.
The biosolids accumulation and biodegradation of domestic wastewater treatment plant (DWTP)
sludge by filamentous fungi have been investigated in a batch fermenter. The filamentous fungi
Aspergillus niger and Penicillium corylophilum isolated from wastewater and DWTP sludge was
used to evaluate the treatment performance. The optimized mixed inoculum (A. niger and P.
corylophilum) and developed process conditions (co-substrate and its concentration, temperature,
initial pH, inoculum size, and aeration and agitaion rate) were incorporated to accelerate the
DWTP sludge treatment process. The results showed that microbial treatment of higher strength
of DWTP sludge (4% w/w of TSS) was highly influenced by the liquid state bioconversion
(LSB) process. In developed bioconversion processes, 93.8 g/kg of biosolids was enriched with
fungal biomass protein of 30 g/kg. Enrichment of nutrients such as nitrogen (N), phosphorous
(P), potassium (K) in biosolids was recorded in 6.2% (w/w), 3.1% (w/w) and 0.15% (w/w) from
its initial values of 4.8% (w/w), 2.0% (w/w) and 0.08% (w/w) respectively after 10 days of
fungal treatment. The biodegradation results revealed that 98.8% of TSS, 98.2% of TDS, 97.3%
of turbidity, 80.2% of soluble protein, 98.8% of reducing sugar and 92.7% of COD in treated
DWTP sludge supernatant were removed after 8 days of microbial treatment. The specific
resistance to filtration (SRF) in treated sludge (1.4×1012 m/kg) was decreased tremendously by
the microbial treatment of DWTP sludge after 6 days of fermentation compared to untreated
sample (85×1012 m/kg).
Michaël C urdassier, Annette Gomot-de Vaufleury, Christiane Lovy, Pierre-Marie Badot.
(Laboratoire de Biologie et Ecophysiologie (EA 3184 MRT/INRA), Institut des Sciences et
Techniques de l'Environnement, Université de Franche-Comté, Place Leclerc, 25030,
Besançon cedex, France). Is the cadmium uptake from soil important in
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