NDLI: Complex use of waste in wastewater and circulating water treatment from oil in heat power stations

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Complex use of waste in wastewater and circulating water treatment from oil in heat power stations

Content Provider	Springer Nature Link
Author	Nikolaeva, L. A. Iskhakova, R. Ya.
Copyright Year	2017
Abstract	Sewage and circulating water from oil of thermal power plants (TPP) generated in fuel-oil shops during washing of electrical equipment and its running into the storm drainage system from the industrial site has been considered in the paper. It has been suggested to use the carbonate sludge of water treatment modified with hydrophobing emulsion as a sorption material for waste and circulating water treatment in thermal power plants. The carbonate sludge is waste accumulated in clarifiers at the stage of natural water pretreatment. General technical characteristics of the sludge, such as moisture, bulk density, total pore volume, ash, etc., have been determined. It has been found that the sludge without additional treatment is a hydrophilic material that has low adsorption capacity and wettability with nonpolar compounds. Therefore, the sludge is treated with organosilicon compounds to reduce the moisture capacity and increase its floatation. Several types of sorption materials based on the carbonate sludge subjected to surface and volume hydrophobization have been developed. During the volume treatment, the hydrophobing compound has been introduced into the material along with the plastifier. In case of the surface treatment, heat-treated granules have been soaked into hydrophobing emulsion. It has been shown that surface hydrophobization is most economically advantageous, because it reduces the consumption of water-repelling agent, wherein the total pore volume and sorption capacity during surface hydrophobization increase by 45 and 25% compared to that during volume hydrophobization. Based on the obtained results, the most effective sorption material has been chosen. To produce this material, it is necessary to sequentially carry out mixing of carbonate sludge with the binder, granulation, calcination, impregnation with a waterrepellent emulsion, and drying of the finished material. The suggested technology to produce the material and use it as a sorbent allows efficient wastewater treatment from oil as well as reduction of anthropogenic pressure on the environment and economic costs of the station for nature protection measures.
Starting Page	458
Ending Page	463
Page Count	6
File Format	PDF
ISSN	00406015
Journal	Thermal Engineering
Volume Number	64
Issue Number	6
e-ISSN	15556301
Language	English
Publisher	Pleiades Publishing
Publisher Date	2017-05-24
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	sorption material waste recovery water treatment sludge material resource wastewater treatment oil Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Nuclear Energy and Engineering

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