DOI 000000
UDC 628.196
Romanovskii Valentin, Gorelaia Olesia
Sorbent for oily wastewater treatment based on the wastes of de-ironing plants
Summary
The results of studying the properties of a sorbent obtained by the synthesis of nanosized iron oxides from the sludge generated during purification of wash water of de-ironing filters are presented. The method of exothermic combustion in solutions was chosen for the synthesis. Citric acid and hexamethylenetetramine were used as reducing agents in a stoichiometric ratio according to the reaction equation. X-ray phase analysis of the obtained samples showed the predominant presence of a magnetite phase and, at temperatures above 600°C, an additional hematite phase. The total static exchange capacity and specific surface area of the synthesized sorbent samples (up to 186.6 m2/g) were determined from the sorption of methylene blue dye. The sorbent capacity of the materials obtained (up to 3.1 g/g) is not inferior to the existing sorbents of oil products. Obtaining magnetic oil sorbents is possible eliminating the use of expensive technologies but with the simultaneous use of waste from de-ironing plants which will provide for reducing the negative anthropogenic impact on the environment and obtaining an economic effect at least by reducing the cost of production.
Key words
oil products , wastewater treatment , filter bed , sorbent , exothermic combustion in solutions , deironing plant sludge
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DOI 10.35776/VST.2022.04.06
UDC 628.212.2/.316
Grekov Mikhail, Elagin Sergei, Kozinets Galina, Chechevichkin Viktor, Leonov L. V., Klokov Aleksandr, Chechevichkin A. V., Iakunin L. A.
Test operation of a two-stage plant based on FOPS® filters
for the enhanced treatment of surface runoff
Summary
Moto transport has been the main source of pollution of surface runoff in large cities; therefore, runoff from roads and car parking spaces must be subjected to enhanced treatment including several stages. As part of solving this problem, works were carried out to estimate the operation of a two-stage plant (based on sequentially operating FOPS®-S and FOPS®-MU filters) in the process of surface runoff treatment from the car parking spaces during various seasonal changes. As a result of test experiments, it was found that for 21 months the plant provided for 98–99% efficiency of removing suspended solids and 94–97% efficiency of removing oil products from the surface runoff. After three years operation including winter periods with below-zero temperatures to less than –20°C, the plant provided for the required treatment level according to the monitored parameters. Occasionally, the FOPS®-S filter was cleaned – removing suspended solids and oil products.
Key words
cleansing , suspended substances , oil products , surface runoff , FOPS filter , car parking
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DOI 10.35776/VST.2021.02.04
UDC 628.212.2/.316
Leonov L. V., Grekov Mikhail, Chechevichkin A. V., Iakunin L. A., Elagin Sergei, Kozinets Galina
Test operation of a FOPS®-S filter separator in the process
of surface runoff purification from the car parking area
Summary
Surface runoff from large metropolitan areas is heavily polluted. Car parking areas are of overriding concern in pollution since the surface runoff generated on them contains high concentrations of oil products and suspended solids. The aim of the project was multi-season test operation of a FOPS®-S filter-separator for the purification of the surface runoff disposed into the sewer system from the parking area. In the course of observations, it was found that over 21 months of testing, the FOPS®-S filter provided for removing
82–99% suspended solids and 55–76% of oil products from heavily contaminated surface runoff (at their maximum concentration in the surface runoff 3000 and 10.5 mg/dm3, respectively). No decrease in the treatment efficiency was observed for 21 months, including the periods of negative temperatures (two seasons). During the tests the hydraulic discharge of the trapped pollutants from the FOPS®-S filter was carried out twice: suspended solids (~ 130 kg) and oil products (~ 2.1 dm3).
10,5 мг/дм3 соответственно). Снижения эффективности очистки в течение 21 месяца не наблюдалось, в том числе в периоды отрицательных температур (два сезона). За время испытаний из фильтра ФОПС®-С дважды производилась гидровыгрузка задержанных загрязнений: взвешенных веществ (~ 130 кг) и нефтепродуктов (~ 2,1 дм3).
Key words
cleansing , suspended substances , oil products , surface runoff , FOPS filter , filtering cartridge , car parking
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DOI 10.35776/VST.2021.01.09
UDC 628. 32:628.221
Tsyba A. A., Skolubovich Iurii, Pupyrev E. I., Ponomarenko A. M., Volkov Dmitrii
Environmentally friendly technology for the treatment of surface runoff from industrial sites
Summary
The issues related to the collection and treatment of surface runoff from the territories of industrial enterprises are stated. The analysis of the technologies for surface runoff treatment showed that the applied process flow schemes, generally, did not produce the required effect and were uneconomical. In addition, the technologies and equipment often do not provide for the utilization of wash water and sludge generated during the treatment of surface runoff. As a result, raw surface runoff containing suspended solids, oil products and other pollutants enters water bodies and produces a negative impact on the ecosystem of water bodies, public health and safety. In this regard, improving the technologies of surface runoff treatment to achieve high efficiency at minimal costs is a most urgent task. The characteristics of the composition of surface runoff from industrial sites are given through the example of a CPP facility in Novosibirsk. Surface runoff treatment methods are considered. The way of improving the technologies of surface runoff treatment with the use of structurally new treatment facilities, increasing the efficiency of chemical treatment and utilization of sludge is determined.
Key words
suspended substances , oil products , surface runoff , surface runoff sludge , wash water , discharge into a water body
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UDC 628.31:725.384
NECHAEV I. A., BELEVCEV A. N., ZHAVORONKOVA V. I., MENSHUTIN Yu. A., BEZRUKOV S. Z., BAJKOVA S. A., MELNIKOVA N. N.
Ecological Problems of Operation of Car-Washing Facilities and Means of Their Solving
Summary
A brief analysis of problems connected with the use of water in car-washing systems, disposal and treatment of wastewater generated is made. Main components of the car-washing facility’s wastewater are suspended substances, oil products and synthetic surface active agents. To ensure efficient treatment of wastewater guaranteeing the quality of treated water meeting the requirements of its use in recirculating systems as well as for discharge into sewerage networks, basins or on the relief it is necessary to use a complex of methods including coagulation, flotation, ozonization and sorption. A principal basic flowchart of the use, treatment and disposal of wastewater from car-washing facilities guaranteeing water quality and meeting the normative standards is proposed.
Key words:
ozonization , washing agents , non-ionogenic and anion synthetic surface active agents , oil products , wastewater treatment , coagulation , flotation , sorption
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UDC 628.11:504.064
KINEBAS A. K., NEFEDOVA E. D., Gvozdev V. A., Portnova T. M., Zaichouk А. А.
Operating and developing water quality monitoring systems to ensure the safety of water supply
Summary
In 2006 a system of water supply safety management was introduced at the SUE «Vodokanal of St. Petersburg» facilities. The system includes: water sources biological monitoring stations operating on the basis of variational crayfish pulse metering; automatic stations of continuous environmental monitoring; equipment system for detecting accidental oil spills in the Neva River water area; carrying out semiquatitative rapid tests of toxic substances; emergency sampling and analyzing water samples in case of toxic pollution hazard; systems of dozing powdered sorbents to remove water pollutants. To ensure continuous automatic monitoring, timely detection and identification of toxic substances a set of remote optical loggers and fluorimetrical flow-through instruments is used. The automatic plant for preparing and dozing powdered activated carbon includes: a big-bag emptying unit, a unit for activated carbon storing and pumping with the help of a compressor and an injector for dry product; a unit for sorbent preparing and dozing. Introducing the principle of timely detection and identification of toxic substances in water intakes, particularly with the use of online monitoring, allowed improving the responsiveness to the changes in the incoming water quality and ensuring the safety of the municipal water supply.
Key words
oil products , biomonitoring , water supply safety , toxic substance , sorption technology
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UDC 628.33:551.577.21
IVKIN P. A., MENSHUTIN Yu. A., Sokolova E. V., Fomicheva E. V., Kedrov Yu. V.
The efficiency of storm water treatment facilities of continuous flow type
Summary
The analysis of technical parameters and process efficiency of some modifications of continuous flow storm water treatment facilities manufactured by international and Russian vendors that have been widely used nowadays for storm and melt water treatment is presented. Continuous flow installations operate as part of a gravity storm water collection system without any accumulating tank under highly irregular hydraulic load conditions. On the basis of process calculations made according to the effective in RF design rules and norms as well as on the basis of the practical data analysis a number of essential process and design faults are revealed that account for low sanitary and environmental efficiency and high operating vulnerability of such installations during surface runoff treatment.
Key words
settling , filtration , suspended substances , oil products , sorption , surface runoff treatment , continuous flow installation , coalescence
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UDC 628.33:551.577.21
Gandurina L. V., Andriyash E. N., Lovlin V. M.
The efficiency of flotofloculation treatment of industrial storm oil effluents
Summary
The results of industrial-scale operation of flotoflocculation plant for industrial storm oil effluents treatment in КWI (Austria) dissolved-air flotation unit with the addition of Praestol 853 cationic flocculant are presented. It was shown that the efficiency of wastewater treatment in the terms of residual oil concentration can be ensured at the initial oily waste concentration as high as 1300 mg/l and flocculant dosage of 5.5 mg/l.
Key words
oil products , wastewater , pressure flotation , cationic flocculant
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