ISSN 1070-4272, Russian Journal of Applied Chemistry, 2006, Vol. 79, No. 12, pp. 1935!1939. + Pleiades Publishing, Inc., 2006.
Original Russian Text + T.Yu. Gumerov, A.F. Dobrynina, R.A. Yusupov, V.P. Barabanov, 2006, published in Zhurnal Prikladnoi Khimii, 2006, Vol. 79,
No. 12, pp. 1958!1962.
OF SYSTEMS AND PROCESSES
Coagulation in Lipid- and Protein-containing Systems
T. Yu. Gumerov, A. F. Dobrynina, R. A. Yusupov, and V. P. Barabanov
Kazan State Technological University, Kazan, Tatarstan, Russia
Received March 16, 2006
Abstract-The behavior of real disperse systems with organic impurities was examined under conditions
of destabilization by inorganic coagulants. A number of physicochemical methods of analysis and a simula-
tion method were used to identify the character and type of the complexes formed and to calculate their
Real colloid systems in wastewater from industrial
enterprises are complex multcomponent systems.
The data on the stability of lipid- and protein-contain-
ing systems [1, 2] need adequate systematization.
In this study, we optimized the conditions of re-
moval of lipid- and protein-containing impurities from
wastewater with inorganic coagulants.
We examined disperse systems in wastewater from
meat processing enterprises.
The main characteristics
of the disperse systems are listed in Table 1. It is seen
that all of them exceed the levels prescribed by the ex-
isting standards by an order of magnitude.
As coagulants served aluminum sulfate [GOST
(State Standard) 12 9663 85], aluminum chloride [TU
(Technical Specifications) 102612388], and iron(III)
chloride (GOST 4147374).
We used the Soxhlet , Kjeldahl , and IR Fou-
rier spectroscopic methods  for physicochemical
analysis. The optimal concentrations of the coagulants
were determined on the basis of the sedimentation
analysis data in combination with measurements of
the optical density of the solutions. The composition
of the compounds in the system and the constants of
equilibria involving them were determined by poten-
tiometric titration and simulation . An IR Fourier
spectroscopic study showed that the samples of both
disperse systems (KMC, SMC) contain nearly identi-
cal sets of absorption bands (Fig. 1). The absorp-
tion band intensities were estimated from the optical
densities, using the band at 1600 cm
as internal ref-
The IR Fourier spectra contain a broad absorption
band at 330033348 cm
corresponding to stretching
vibrations of the NH groups. A group of bands at
is associated with the absorption of
Table 1. Main characteristics of the disperse systems
³ Particulates ³ Lipids ³ Proteins
³ ³ ³ ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄ
³³ ³ ³ mg l
KMC ³ 6.537.0 ³ 2000 ³ 1770 ³ 800 ³ 800 ³ 234
SMC ³ 6.537.0 ³ 1990 ³ 1520 ³ 100 ³ 374 ³ 155
³ 6.538.5 ³ 265 ³ 177 ³ 186 ³ 10 ³ 0
Hygienic standards and regulations. Concentration of harmful substances in wastewater: Order of the Head of the City of Kazan
Administration no. 917 of May 15, 2000.
Kazan Meat Combine (KMC) and Sviyaga Meat Combine