Research into processes of wastewater treatment at plants of meat processing industry by flotation and coagulation

Савчук, Л. В.; Знак, З. О.; Kurylets, Oksana; Mnykh, Roman; Olenych, R. R.

doi:10.15587/1729-4061.2017.101736

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…Under the influence of ultrasound, complex physical and chemical processes occur in the aquatic environment that contribute to the oxidation of organic substances and reduction of COC, the structuring, compaction, and agglomeration of sediment, etc. Work [12] shows the positive effect of preliminary ultrasonic treatment of Са(ОН) 2 suspension on the process of coagulation treatment of wastewater from meat processing enterprises. The efficiency of the COC process, depending on the concentration and dose of acoustically treated Са(ОН) 2 , increased by 1.3...4.5 times.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Coagulation treatment of effluent from milk-processing enterprises with waste FeSO4

Kurylets

Helesh

Vasiichuk

et al. 2022

EEJET

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As the world's population grows, the problem of food shortages becomes global, and, for human survival, it is necessary to significantly increase food production, which may increase environmental pollution. This paper has theoretically and practically substantiated the expediency of coagulation treatment of wastewater from milk-processing enterprises. The coagulant proposed to use is a multi-tonnage waste from industrial enterprises, specifically technical ferrous sulfate. It is shown that it is advisable to use the dairy effluent imitations based on milk powder for experimental studies. The potentiometric titration of dairy effluent imitations has established the presence of two points (pH=4.2 and 8.3), which characterize the boundaries of the buffering capacity of solutions. The expediency of carrying out the process of coagulation of dairy effluents in a weakly alkaline environment at pH≥8.3 has been substantiated, and, for the starting effluent to reach such a pH value, a 10-% suspension of Са(ОН)2 should be used. The effectiveness of reagent treatment of dairy effluents has been experimentally confirmed, subject to the alternate introduction of a coagulant (technical FeSO4) and flocculant (polyacrylamide) in the quantities of 120 and 40 mg/dm3, respectively; the degree of clarification of dairy effluents is 90 % while the residual COC value is 76 mgO2/dm3. It has been shown that when ultrasound was applied, it was possible to significantly reduce the interaction time and the amount of Са(ОН)2 suspension necessary to achieve pH≥8.3. Thus, there are grounds to assert the prospects for devising highly effective technology for the coagulation treatment of wastewater from milk-processing enterprises; the results and conclusions reported here about the technological feasibility of using technical FeSO4 as a coagulant could be practically applied for other technologies of coagulation wastewater treatment, provided that its pH value is brought to 8.3.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Coagulation treatment of effluent from milk-processing enterprises with waste FeSO4

Kurylets

Helesh

Vasiichuk

et al. 2022

EEJET

Self Cite

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“…It was shown that when using ultrasound, it was possible to significantly reduce the interaction time and the amount of Ca(OH) 2 suspension. The positive effect of the use of ultrasound was also shown in the treatment of wastewater from meat processing enterprises (Savchuk et al, 2017). To reduce the cost of coagulation wastewater treatment, coagulants obtained from waste from other industries are used (Vasiichuk et al, 2022).…”

Section: Introductionmentioning

confidence: 98%

Analysis of the State of the Municipal Solid Waste Landfill in Ivano-Frankivsk, Ukraine, the Composition of the Leachate, and Promising Technologies for its Treatment

Chelyadyn,

Khomun,

Slyuzar

et al. 2024

J. Ecol. Eng.

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The characteristics of the hydrogeology of the municipal solid waste landfill in Ivano-Frankivsk are given. Accumulation of waste in landfills causes environmental problems due to pollution of the atmosphere, water resources, and soil. It was established that there is practically no contamination of the water horizon with infiltrate. Commissioning of the leachate pipeline, which feeds part of the leachate to the city's treatment facilities, solves the problem of the accumulation of leachate at the landfill, however, creates an additional burden on these facilities. The composition of the infiltrate was analyzed. It was confirmed that the main harmful pollutants of infiltrates are oil products, nitrogen-containing compounds, dyes, humic compounds, and heavy metals. The main methods of cleaning of infiltrates abroad and in Ukraine are characterized. Based on the analysis of the available impurities, for the purification of the infiltrate, it is proposed to use the technology of physical-electrochemical wastewater treatment, which includes their treatment in electrocoagulators and the separation of coagulated impurities in a thin-layer settling tank. Our studies showed that during infiltrate purification up to normative indicators of its discharge to treatment plants are not reached and it is worth using additional treatment of the infiltrate with oxidizers. As a result of exploratory studies, it is proposed to carry out additional treatment with hypochlorite ions, which can be obtained during the electrolysis of the infiltrate on an inert anode. Cleaning the infiltrate using the described technology will reduce environmental pollution, which means increasing the level of environmental safety of the solid waste landfill.

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“…In accordance with the goals of sustainable development where the priority is environmental improvement and conservation of natural resources a 3R waste management strategy (Reduction, Reuse, Recycling) will be effective, that is we consider waste as available resources (Madadian et al, 2020;Savchuk et al, 2017;Kurylets et al, 2022). Therefore, technologies for processing secondary organic waste into useful secondary raw materials will help to improve the functioning of the circular economy (European Commission, 2018;Vanhamäki et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Substrates based on composted sewage sludge for land recultivation

Storoshchuk

Malovanyy

Tymchuk

2022

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Increasing a large amounts of sewage sludge in Ukraine is an urgent environmental problem that requires the selection of an effective strategy for their disposal. The usage of sludge composting technology leads to the restoration of sludge as a resource and is cost-effective and environmentally sustainable compared to the method of landfilling. The purpose of this research is to carry out bioindication tests of growth substrates based on composted sewage sludge with the subsequent possibility of their usage in the technology of recultivation of landfills for municipal solid waste. The experiment was performed on four types of compost with different modifications of the natural sorbent - zeolite. During the experiment the average percentage of germination of polygamous ryegrass plants (Lolium perenne L.) was determined in the investigated substrates. The mass and length of the aboveground part of the plant and roots were also measured. The results showed that the addition of natural sorbent to substrates has a positive effect on growth and development of plants. This investigation was conducted in accordance with the current norms of national standards of Ukraine: DSTU 7369 (2013), "Wastewater. Requirements for wastewater and its sediments for irrigation and fertilization"; DSTU ISO 11269-1 (2004), "Soil quality. Determination of the effect of pollutants on soil flora. Part 1: Method for determining the inhibitory effect on a root growth"; DSTU ISO 11269-2 (2002), "Soil quality. Determination of the effect of pollutants on soil flora. Part 2: Effects of Chemicals on Germination and Growth of Higher Plants". The experiment was conducted on four types of compost with different modifications of the natural sorbent - zeolite in percentage amounts: 0; 2.5; 5; 7.5, dark-grey gilded soil was used as a control element. In the experiment, the average percentage of germination of polygamous ryegrass plants (Lolium perenne L.) on the studied substrates was determined. The mass and length of the aboveground part of the plant and roots were also measured. The first sprouts of ryegrass began to appear on the 7th day of the experiment. The highest average value on the seventh day of germination was 90% in the control sample with 5% of sorbent content and in K2 substrate in the sample with 7.5% sorbent content. However, the germination of plants in substrates K3 and K4 occurred later compared with substrates K1, K2, and control. For substrate K1 in the sample with a sorbent content of 5%, plant germination was the highest and was 100%. The highest average value of ryegrass stem length is observed in variant K4 in the sample with 0% zeolite content and in variant K1 in the sample without zeolite content the lowest average value of stem length was observed. The K3 and K4 variants have a more developed root system compared to other variants. Based on the obtained data it can be assumed that the most optimal universal component for creating a growth substrate is variant K3 (mixture of "newly picked" and "old" SS) which has not so developed aboveground part but has very branched root system that allows to adapt to various environmental factors and in combination with a small proportion of natural sorbents can be effective for the recultivation of MSW landfills, which in its turn minimizes the need to use a fertile soil layer.

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Research into processes of wastewater treatment at plants of meat processing industry by flotation and coagulation

Cited by 7 publications

References 6 publications

Coagulation treatment of effluent from milk-processing enterprises with waste FeSO4

Coagulation treatment of effluent from milk-processing enterprises with waste FeSO4

Analysis of the State of the Municipal Solid Waste Landfill in Ivano-Frankivsk, Ukraine, the Composition of the Leachate, and Promising Technologies for its Treatment

Substrates based on composted sewage sludge for land recultivation

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