Технологические аспекты обезвоживания осадков промышленно-дождевых сточных вод автотранспортных предприятий

2019 ◽  
pp. 25-30
Author(s):  
G. Variushina
Keyword(s):  
Wastewater Treatment ◽  
Moisture Content ◽  
Vacuum Filter ◽  
Operational Parameters ◽  
Technological Parameters ◽  
Wastewater Treatment Process ◽  
Motor Transport ◽  
Cationic Flocculant ◽  
Residual Sludge ◽  
Treatment Facilities

Приводятся сведения об условиях формирования, объемах, химическом составе и свойствах осадков очистных сооружений производственных сточных вод автотранспортных предприятий. Даны примеры технологических решений по обезвоживанию образующихся в процессе очистки шламов. Рассмотрены технологические аспекты процесса интенсификации механического обезвоживания уплотненных осадков с использованием высокомолекулярных полиэлектролитов. Представлены данные лабораторных экспериментов по выбору типа флокулянта, его дозы, технологических параметров процесса, а также результаты определения влажности обезвоженных осадков, полученные на модели барабанного вакуум-фильтра. Приведены примеры эффективных обезвоживающих аппаратов отечественного производства и их технические характеристики, рекомендации и критерии их выбора, а также факторы, оказывающие влияние на эксплуатационные параметры обезвоживающего оборудования. Установлено, что наилучшая обезвоживающая способность барабанных вакуум-фильтров (остаточная влажность шламов от 66 до 83) может быть достигнута при применении катионного флокулянта ВПК-402 для осадков различных производственных цехов автотранспортного предприятия.Information on the conditions of generation, volumes, chemical composition and properties of sludge generated at the industrial wastewater treatment facilities of motor transport enterprises is provided. Examples of process engineering solutions for dewatering sludge generated during the wastewater treatment process are given. The technological aspects of enhancing mechanical dewatering of thickened sludge using high-molecular polyelectrolytes are considered. The data of laboratory experiments on choosing the type of flocculant, its dose, technological parameters of the process, as well as the results of determining the moisture content of dewatered sludge obtained in a model of a drum vacuum filter are presented. Examples of effective domestically produced dewatering apparatus and their technical characteristics, recommendations and criteria for their selection, as well as factors influencing the operational parameters of the dewatering equipment are given. It is found that the highest dewatering capacity of drum vacuum filters (residual sludge moisture content from 66 to 83) can be achieved by using VPK-402 cationic flocculant for processing sludge generated at the workshop premises of a motor transport enterprise.

scholarly journals Wastewater deodorization: problems and solutions

2021 ◽  
Vol 937 (4) ◽  
pp. 042064
Author(s):  
E Glushchenko ◽  
A Kadyseva
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Technological Parameters ◽  
Wastewater Treatment Process ◽  
Indian American ◽  
Sludge Digestion ◽  
Volatile Organic ◽  
Problems And Solutions ◽  
Treatment Facilities ◽  
Sludge Thickening

Abstract The problem of specific malodours odorants, emitted from the territory of wastewater and sludge treatment facilities is set in the article. This article presents a critical review concerning the reasons of odorants formation during wastewater treatment, their influence on human health and ways of wastewater and sludge deodorization. Review is presented by 52 resources of Russian, Chinese, Italian, Greek, Indian, American and other researches from 2000 to 2021 years. According to the review the main sources of odours emission are units of mechanical treatment, sludge thickening and sludge digestion. The main odorants are volatile organic compounds (VOCs), hydrogen sulphide, ammonia, particulate matters and greenhouse gases (carbon dioxide, methane, nitrogen oxide). Based on the article, there are two ways of emission controlling: controlling the technological parameters of wastewater treatment process or gases treatment at specific facilities (adsorbers, biofilters, bioscrubbers, chemical scrubbers).

scholarly journals Effects of reactive filters based on modified zeolite in dairy industry wastewater treatment process

2013 ◽  
Vol 19 (4) ◽  
pp. 583-592 ◽  
Author(s):  
Srdjan Kolakovic ◽  
Dragoslav Stefanovic ◽  
Dragan Milicevic ◽  
Slavisa Trajkovic ◽  
Slobodan Milenkovic ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Food Industry ◽  
Treatment Process ◽  
Dairy Industry ◽  
Technological Parameters ◽  
Wastewater Treatment Process ◽  
High Level ◽  
Filtration Properties ◽  
Industry Wastewater

Application of adsorbents based on organo-zeolites has certain advantages over conventional methods applied in food industry wastewater treatment process. The case study presented in this paper examines the possibilities and effects of treatment of dairy industry wastewater by using adsorbents based on organo-zeolites. The obtained results indicate favorable filtration properties of organo-zeolite, their high level of adsorption of organic matter and nitrate nitrogen in the analyzed wastewater. This paper concludes with recommendations of optimal technical and technological parameters for the application of these filters in practice.

scholarly journals RATIONAL CONSTRUCTION AND TECHNOLOGICAL PARAMETERS OF WATER TREATMENT FACILITIES IN RURAL AREAS

2019 ◽  
pp. 74-81
Author(s):  
Y. B. Mosiichuk ◽  
V. P. Khoruzhy
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
Water Filtration ◽  
Small Scale ◽  
Rural Settlements ◽  
Technological Parameters ◽  
Active Sludge ◽  
Industrial Enterprises ◽  
High Efficient ◽  
Treatment Facilities

In view of the development of cottage construction and enterprises of agricultural products processing, located mainly in rural areas, the development of high-efficient, reliable and easy-to-use treatment plants for the purification of domestic wastewater of low quality is very relevant. The objective of the research is to ensure the high quality purified water and minimize capital and operating costs. To solve this problem, the methods of physical and mathematical modeling were used, as well as numerical and analytical methods for determination and analysis of the parameters of treatment facilities operation. To use the latest advances in science and technology in the area of small-scale wastewater treatment facilities, which are typical for rural settlements and agro-industrial enterprises, in these conditions it is proposed to use bioreactors and contact clarifying filters. As the research has shown, water quality indicators of purified water change during the time of water filtration Tf and depend on the velocity of water filtration Vf and a specific cleanings capacity of the filter: at the beginning their values decrease as a result of accumulation of active sludge in the subfilter space, and then they begin to rise due to the increase of hydraulic resistance to water motion and removing this residual matter into filtered water. The article also presents the results of investigations on changes in the content of organic compounds in filtered water during the filtration cycle Тf by the biochemical oxygen consumption value (BOCV) depending on a water filtration rate Vf, m/h, and the amount of active sludge (specific dirt content of the filter G, kg/m2), as well as the changes in the content of suspended matter Сf.i. due to the same parameters. The recommendations on the effective operation of wastewater treatment facilities of the proposed design that which ensure their reliable and high-performance operation, were developed.  

scholarly journals Modeling a Three-Stage Biological Trickling Filter Based on the A2O Process for Sewage Treatment

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1152
Author(s):  
Jiabin Liang ◽  
Yuan Yuan ◽  
Zimeng Zhang ◽  
Shijie You ◽  
Yixing Yuan
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Sewage Treatment ◽  
Simulation Software ◽  
Reflux Ratio ◽  
Software Modeling ◽  
Trickling Filter ◽  
Operational Parameters ◽  
Wastewater Treatment Process ◽  
Trickling Filters

Biological trickling filters are widely used for sewage treatment. This study models a biological trickling filter based on an anaerobic–anoxic–oxic process (A2O–BTF), established by a combination of aerobic and anaerobic technology. The performance and operational parameters were analyzed using Sumo, a commercially available wastewater treatment process (WWTP) simulation software. The wastewater treatment performance of the anaerobic–anoxic–oxic process biological trickling filter (A2O–BTF), the conventional three-stage biological trickling filter (Three-Stage–BTF), and the single-stage biological trickling filter (Single–BTF) was compared, which indicated the higher performance of A2O–BTF in terms of COD, TN, NH3-N, and TP removal. The operational parameters of A2O–BTF were optimized by Sumo simulation software, and the results showed that the removal efficiency of pollutants was increased by raising the temperature to the range of 13.94–21.60 °C. The dissolved oxygen (DO) in the aerobic reactor enhanced removal efficiency under a saturation concentration of 2.2–2.6 g O2/m3. In addition, the optimization of the reflux ratio promoted the removal efficiency of the pollutants, indicated by the maximum removal efficiency of COD and TN, achieved at the reflux ratio of 2.25, and that of NH3-N and TP, achieved at a reflux ratio of 0.75. This study provides a proof-in-concept demonstration that software modeling can be a useful tool for assisting the optimization of the design and operation of sewage treatment processes.

scholarly journals Modern methods for surface wastewater treatment

2018 ◽  
Vol 178 ◽  
pp. 09020
Author(s):  
Oleg Primin ◽  
Galina Varyushina
Keyword(s):  
Wastewater Treatment ◽  
Large Scale ◽  
Wastewater Treatment Plants ◽  
Local Treatment ◽  
Sewage Water ◽  
Technological Parameters ◽  
Surface Water Treatment ◽  
State Of Water ◽  
Treatment Facilities ◽  
Technical Solutions

The article gives the characteristics of the system of removal and purification of surface wastewater in Moscow. One of the features of this system is the large-scale use of hydrographic network of the city as elements of the drainage network. Currently improvement of the ecological state of water objects is only possible if to reduce anthropogenic load on them and watersheds, to recover self-cleaning abilities of water bodies and the to protect groundwater from contamination. The article reveals results of research, and contains technological parameters for facilities of surface sewage water purification and recommendations to improve their operation. Article also gives technical solutions to upgrade operated wastewater treatment systems and to ensure the achievement of required standards of treatment of surface runoff when dilution in water. Along with proposals for the reconstruction and construction of wastewater treatment plants with the classical technology of surface water treatment, it is necessary to consider the principle of decentralization with the use of local treatment facilities.

Pollution reduction at wastewater treatment facilities through thermophilic sludge digestion

2003 ◽  
Vol 48 (3) ◽  
pp. 57-63 ◽  
Author(s):  
J. Zhou ◽  
D.S. Mavinic
Keyword(s):  
Wastewater Treatment ◽  
Cost Effective ◽  
Land Application ◽  
Operational Parameters ◽  
Significant Deterioration ◽  
Environmentally Sustainable ◽  
Sludge Disposal ◽  
Two Factors ◽  
Treatment Facilities ◽  
Thermophilic Digestion

Wastewater treatment facilities produce large amounts of sludge, which is a pollutant to the environment if not properly managed. Among the three most common methods (landfills, land application, incineration) of sludge disposal, thermophilic digestion to produce Class-A biosolids for land application is recognized as the most cost-effective, environmentally sustainable option. Full-scale experience revealed that thermophilically digested biosolids consumed a higher dosage of chemicals for conditioning and dewatering than conventionally (mesophilically) digested biosolids. This paper presents findings of a recent study to investigate how major operational parameters affect dewatering properties of thermophilically digested biosolids, and to search for the inter-relationship between digestion, characteristics of digested biosolids, and dewatering properties of thermophilic biosolids. Experimental work was carried out using bench-scale aerobic digesters. This study found that feed sludge composition has a significant effect on dewaterability. A higher content of secondary sludge resulted in poorer dewaterability in undigested and digested sludge. Dewatering properties are sensitive to a temperature effect. Such an effect is physical-chemical in nature. Excessive high shear results in significant deterioration in dewaterability. Thermophilic digestion resulted in a substantial increase in ammonia and phosphate concentrations, but these two factors seem to not have much impact on dewaterability. Instead, cellular biopolymers have a significant role in affecting dewatering properties of thermophilically digested biosolids.

Enabling wastewater treatment process automation: leveraging innovations in real-time sensing, data analysis, and online controls

2020 ◽  
Vol 6 (11) ◽  
pp. 2973-2992
Author(s):  
Wenjin Zhang ◽  
Nicholas B. Tooker ◽  
Amy V. Mueller
Keyword(s):  
Wastewater Treatment ◽  
Data Analysis ◽  
Real Time ◽  
Treatment Process ◽  
Resource Recovery ◽  
Process Automation ◽  
Wastewater Treatment Process ◽  
Sensing Data ◽  
Treatment Facilities

The primary mandate of wastewater treatment facilities is the limitation of pollutant discharges, however both tightening of permit limits and unique challenges associated with improving sustainability (i.e., resource recovery) demand innovation.

scholarly journals Determination of modeled costs at sewage treatment plants in the case of different sequences of treatment

Vestnik MGSU ◽  
2021 ◽  
pp. 1077-1087
Author(s):  
Nikolay A. Makisha
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Operating Costs ◽  
Technological Parameters ◽  
Submerged Membrane Bioreactor ◽  
Treatment Facilities ◽  
Definition Of ◽  
The Cost

Introduction. The article considers the definition of the key components of operating costs at wastewater treatment plants with a capacity of 1 to 100 thousand cubic meters per day by modeling using specialized software. Materials and methods. In the study, two technological cleaning schemes were investigated — the conventional line-up with biological aeration reactor and secondary clarifier and the scheme of biological aeration reactor with submerged membrane bioreactor for sludge separation. The other structures for the two facilities were identical. Since it was important to obtain results that could be used at real facilities, the values of concentrations of major pollutants typical for urban wastewater before treatment, as well as technological parameters of operation, were used as initial data for calculations. Results. As the results of calculations, the values of concentrations of pollutants in wastewater after treatment using both technological schemes and the values of the required volumes for the arrangement of biological treatment facilities and the area occupied by them were obtained and analyzed. Operating costs were considered in terms of electricity costs for the operation of biological treatment facilities and treatment facilities in General, as well as the specific cost of electricity for treatment 1 m3 of wastewater. In addition, the cost of purchasing membrane modules was calculated, which can be classified as operational due their replacement frequency of approximately every 7–10 years. Conclusions. The results of the study showed that application of membrane technologies at the stage of secondary treatment could have a significant potential for the reconstruction of wastewater treatment plants in conditions of increased productivity and limited opportunities for expanding the area.

scholarly journals BIOLOGICAL TREATMENT OF WASTE PAPER RECYCLING PLANT WASTEWATER

2020 ◽  
Vol 25 (3) ◽  
pp. 14-21
Author(s):  
Ju. A. Feofanov ◽  
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Raw Materials ◽  
Biofilm Reactor ◽  
Waste Paper ◽  
Biological Wastewater Treatment ◽  
Technological Parameters ◽  
Paper Recycling ◽  
Moving Bed ◽  
Treatment Facilities

Introduction. Among characteristic features of waste paper recycling plant wastewater, the following can be distinguished: significant fluctuations in consumption and composition, high content of undissolved and dissolved substances (in particular, starch, fiber, dispersed thermoplastic and other substances). Local wastewater treatment can reduce the concentration of undissolved and — partially — dissolved contaminants. Besides, it makes it possible to reuse valuable substances and treated water in production. However, a significant amount of dissolved contaminants is dumped by factories at off-site biological treatment plants. In this case, bioreactors with suspended activated sludge (aeration tanks) as well as bioreactors with attached biomass are used for wastewater treatment. Methods. The purpose of the study was to determine the consumption and composition of wastewater discharged by waste paper recycling plants, as well as the technological parameters and performance of biological treatment facilities, including a moving bed biofilm reactor and aeration tanks. In-process control over the operation of treatment plants was carried out by means of instrumental measurements and laboratory analyses conducted according to standard methods. Results. The article examines the results of the operation of biological wastewater treatment facilities used to treat wastewater from a paper mill, where different grades of waste paper are used as raw materials. The main characteristics of biological wastewater treatment facilities’ operation have been identified. Relationships between the oxidation capacity and the load in terms of organic pollution have been obtained for a bioreactor with a moving bed (1st stage) and aeration tanks (2nd stage of biological wastewater treatment). Measures have been proposed to improve the performance of existing treatment plants.

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