Olga. Covaliova

Moldova State University · Industrial and Ecological Chemistry

Waste from the agro-industrial sector, due to its toxic effects on plants and living organisms, cannot be thrown into the ground. At the same time, they can also serve as a renewable source of value-added products, which can be obtained following specific biochemical treatment. This research focused on studies of biomass fermentation processes in t...

Ferrite treatment of wastewater is a promising approach, making it possible to resolve environmental and economic problems, due to the high degree of water purification and final formation of chemically stable sludge with crystal oxide structure and ferromagnetic properties. This chapter discusses the specifics of ferrite treatment of wastewater co...

Waste management in the agro-industrial sector is an important issue as it offers ways to prevent the toxic discharges of harmful pollutants into the environment, and at the same time to obtain a series of value-added products. Liquid organic wastes from the agro-industrial sector are usually in the state of continuing digestion and are capable of...

A new scientific-technological concept of the utilization of wine and distillery wastes is proposed. The results of complex research are given, related to the effect of biologically active substances (BAS) on biomethane and biohydrogen emission from the distillery wastes. It was shown that the test substances can provide a 3−4 times increase in fer...

The problem of preventing the heavy metals and other toxic substances release in environment due to the discharges of untreated plating and rinsing solutions is actual from both ecologic and economic point of view. It is crucial to prevent the environmental pollution and uncontrolled losses of resources (metals and other substances). The treatment...

A new type of a hybrid photocatalytic reactor, working under the combined natural solar and artificial UV-irradiation, and a biochemical aerobic reactor with floating package with fixed microflora are described. The destruction process can be performed either under homogeneous conditions when Fenton's reagent based on iron trioxalate and hydrogen p...

With the scope to provide complete decomposition of benzothiazoles in water environment, two approaches have been applied including the photocatalytic and biodegradation processes. A new type of continuous-action flow-through photocatalytic reactor was developed, in which it is possible to combine the homogeneous and heterogeneous destruction of re...

This paper deals with the physical-chemical and microbiologic treatment of persistent organic pollutants POPs (namely, benzothiazoles), and the limits of these methods applicability are considered. The new technical solutions improving their degradation efficiency were proposed, by using microbiological treatment and photo-catalytic one, with the U...

A strategy of winery and distillery waste water treatment is proposed, having the ecologic and economic effect, based on application and intensification of anaerobic fermentation of organic substrate in waste water, with biogas production as energetic agent with high contents in methane. The technology applied combines the following processes: addi...