Institute for Sanitary Engineering, Water Quality and Solid Waste ...

Biological Air Purification ALR
pH increased to alkaline conditions; optimal pH was
found ranging between 7 – 7.5. The reduction process
was improved by adding high amounts of citrate to
the medium; the reduction percentage obtained was:
55% of 1000 mg/L Cr(VI) using 4 g/L citrate and 76%
of 1000 mg/L Cr(VI) using 6 g/L citrate. The biological
reduction was inhibited in the presence of ions as Pb 2+ ,
Zn 2+ , F - , Cu 2+ and Cl - in industrial wastewater containing
Cr(VI). In addition, CRM100 was able to grow under
anaerobic conditions within a variety of electron
2- 2- 2-
acceptors, including MoO 4
, ClO 4-
, AsO 4
, SO 4
and
-
MnO 4
as well. The results suggested the potential applicability
of CRM100 for the bioremediation of metal
contaminated wastewater
Name: Diego Salamanca (WAREM) 2009
Supervisor: Dr. N. Strunk
Master Thesis
an efficient system. Within an air flow the evaporated
water as well as volatile organic compounds as well as
anorganic compounds like H 2
S and NH 3
are separated
from the dried matter. Poorly, high fluctuation in the
composition of this air stream occure. A treatment of
this high odorant air containing high carbon freights is
necessary. Up to now state of the art techniques are
not adequate to fulfil the limit values of 20 mg C/m³
and 500 OU/m³ defined by the TA-Luft, respectively.
The main task of this thesis was to choose adequate
procedures for efficient treatment of this contaminated
air and to verify and compare the efficiency of the
choosen techniques in treating a real waste air flow of
a cement plant. The focus lied on an evaluation of the
procedures, feasibility of specific optimisation potential
and selective treatment of a single and mixed waste
air streams occurring on-site.
Christian Wilde (Umweltschutztechnik) 2009
Advisor: Dr.-Ing. D. Dobslaw
Diploma Thesis
Impact factors on the growth and degradation
efficiency of nitrifying bacteria in a MBR-system
in dairy industry
Liquid culture of the strain CRM100. Right side: Fresh
2-
medium with 100 mg/L CrO 4
. Left side: The cromate
was reduced to green Cr(III)-compounds.
Efficiency comparation of biological and non biological
waste air treatment procedures for economical
and ecological optimised treatment of
belt dryer emissions in the cement industry
Within endothermic clincer brick production processes
out of lime in the cement industry high amounts of
fossile fuels were necessary. Modern processes base
on a thermal use of cadaver, animal meal, tyres, municipal
and industrial sewage sludges instead of fossile
fuels. About 5 % of the total energy demand is covered
by the thermal use of sewage sludges, which are
not directly combustible in the rotary furnaces, because
of their high water contents. A thermal pre-drying
procedure using waste heat of the rotary furnace is
During the production process of milk sugar powder
using vacuum distillation procedures waste water
streams with COD contents of up to 200 mg O2/L and
total nitrogen contents of up to 100 mg N/L are generated.
These waste water flows are treated by a MBR
system and the separation of treated water from the
biomass in done by a ultra filtration step. The filtrate
is further treated by a reverse osmosis unit for desalination
and the permeat is fed into the process water
circle. Precondition of the use as process water is an
efficient nitrogen elimination by oxidation of the ammonia
to nitrate and further denitrification to gaseous
nitrogen. However, no efficient nitrification occurred in
this system. The goal of this diploma theses was to
find out which waste water vapours and permeates as
well as process steps posses a high inhibitory potential.
The focus lied on the behaviour of organic acids, especially
lactic acid, shear forces caused by the circulation
pumps as well as the ejector system and turbulences
in pH value and temperature in correlation to the ammonia
oxidation rates appearing simultaneously.
Tamara Linda Junghans (Umweltschutztechnik) 2009
Advisor: Dr.-Ing. D. Dobslaw
Diploma Thesis
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