scholarly journals ANALYSIS OF PHYSICOCHEMICAL WASTEWATER TREATMENT IN ARCTIC ZONES

2020 ◽  
Vol 22 (1) ◽  
pp. 152-163
Author(s):  
E. I. Vialkova ◽  
E. S. Glushchenko ◽  
T. S. Velizhanina ◽  
E. Y. Osipova
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Wastewater Discharge ◽  
Total Change ◽  
Climatic Zones ◽  
Physicochemical Treatment ◽  
Treatment Facilities ◽  
The Russian Federation ◽  
Sewage Systems ◽  
Design Construction

The large part of the Russian Federation locates in arctic and subarctic climatic zones, which determine the specificity of design, construction and operation of sewage systems of these regions. Nowadays, the most part of small Arctic towns has no wastewater treatment facilities, while the available biological treatment facilities do not work properly. An alternative way is physicochemical treatment, which is more resistant to severe climate and volley wastewater discharge than biological treatment. The paper presents the research results of total change the biological into physicochemical treatment. The main stages of such a treatment include coagulation, filtration, oxidation and two-stage filtration (mechanical and absorption). The experiments show a 90.8% decrease in the concentration of chemical oxygen and a 74% and 82.5% decrease in nitrates and ammonium.

Обезвреживание поверхностного стока – важный вклад в охрану водных объектов

2019 ◽  
pp. 48-54
Author(s):  
G. Variushina
Keyword(s):  
Wastewater Treatment ◽  
Russian Federation ◽  
Surface Runoff ◽  
Commercial Fishing ◽  
Research Activity ◽  
Educational Work ◽  
Industrial Enterprises ◽  
Retention Basin ◽  
Treatment Facilities ◽  
The Russian Federation

Приводятся сведения о разработанных специалистами АО МосводоканалНИИпроект научных исследованиях и проектных решениях в области очистки поверхностных сточных вод с территории Москвы, причинах загрязнения водоисточников неочищенными поверхностными стоками в 1970х годах. Представлены основные характеристики комплексов глубокой очистки поверхностных стоков, разработанных проектов очистных сооружений для промышленных предприятий с площадью водосбора 0,3 1 5 10 и 15 га. Показано, что эффективность очистки поверхностных сточных вод соответствует требованиям, предъявляемым к водоемам рыбохозяйственного значения. При этом для обезвоживания осадка, образующегося в накопительном резервуаре очистных сооружений, в технологической схеме предусмотрена песковая площадка, а для сбора плавающих нефтепродуктов нефтеразделитель. Новизна разработанной технологии обезвреживания поверхностного стока и обработки осадка была подтверждена пятью патентами РФ, одобрена Госстроем РФ, Центральным управлением по рыбохозяйственной экспертизе и нормативам по сохранению, воспроизводству водных биологических ресурсов и акклиматизации, Городской санитарной службой Москвы и области, службами Москомприроды и Мосгосэкспертизы. Показан вклад специалистов лаборатории обработки природных, промышленнодождевых сточных вод и осадка в решение проблем очистки поверхностного стока. Приведена информация об истории развития и перспективных направлениях научной деятельности лаборатории, ее планах в организационнометодической и воспитательной работе с молодыми специалистами.Information on the research and design solutions developed by the experts of MosvodokanalNIIproject JSC in the field of surface runoff treatment from the territory of Moscow, the causes of water sources pollution with raw surface runoff in the 1970s. The basic characteristics of the complexes for the enhanced treatment of surface runoff, the developed projects of wastewater treatment facilities for industrial enterprises with a catchment area of 0.3 1 5 10 and 15 ha. It is shown that the effectiveness of surface runoff treatment meets the requirements to water bodies of commercial fishing importance. At the same time, for dewatering of sludge generated in the retention basin of wastewater treatment facilities, a grit dewatering bay is included into the process flow scheme, and an oil separator is used to collect floating oil products. The novelty of the developed technology for neutralization of surface runoff and sludge treatment has been acknowledged by five patents of the Russian Federation, approved by Gosstroy of the Russian Federation, the Central Department of Fisheries Examination and Review and Protection and Renewal and Acclimatization Standards, the Moscow City and Moscow Region Sanitary Service, Moskompriroda and Mosgosekspertiza services. The contribution of the research workers of the laboratory for the treatment of natural, industrialstorm wastewater and sludge processing to the solution of problems of surface runoff treatment is demonstrated. The information about the history of development and promising areas of research activity of the laboratory, its plans in the organizational, methodological and educational work with young professionals is given.

Stages of launching a biological treatment plant at the wastewater treatment facilities with dosing easily oxidable organic matter

2021 ◽  
pp. 38-46
Author(s):  
В.А. Кондрашев ◽  
С.Г. Метелица
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Commercial Fishing ◽  
Effluent Quality ◽  
Start Up ◽  
Numerous Experimental Data ◽  
Treatment Facilities ◽  
Equipment Configuration

Рассмотрены вопросы, связанные с проведением пусконаладочных работ биоблока станции очистки хозяйственно-бытовых и близких к ним по составу сточных вод при пробном пуске в эксплуатацию очистных сооружений. Подробно рассмотрены этапы пусконаладочных работ биоблока очистных сооружений с «затравкой» активным илом из действующих биологических очистных сооружений и с дозировкой легкоокисляемой органики. Описан состав оборудования станции КОС-9 производства «Гермес Групп». Рассмотрены все этапы пусконаладочных работ биоблока на примере запуска очистных сооружений КОС-9 с привлечением многочисленных опытных данных. Определены периоды этапов пусконаладки биоблока. Приведены проблемы наладки биоблока и пути их решения с достижением требуемого результата. Технология, используемая на станции, обеспечивает очистку сточных вод, соответствующую требованиям, предъявляемым к выпуску очищенных стоков в водоем рыбохозяйственного значения. Issues related to commissioning a biological treatment plant at the facilities for household and similar in composition wastewater treatment during the trial start of the treatment facilities are considered. The stages of commissioning a biological treatment plant at the wastewater treatment facilities with «inoculating» activated sludge from the operating biological treatment facilities and with dosing easily oxidable organic matter are considered in detail. The equipment configuration of the WWTP-9 produced by Germes Group is described. All stages of the biological treatment plant commissioning are considered through the example of the start-up of WWTP-9 with the use of numerous experimental data. The periods of biological treatment plant commissioning stages have been determined. The problems of adjusting the biological treatment plant and the ways of their elimination to achieve the required result are presented. The technology used at the WWT facilities provides for the effluent quality that meets the requirements for the discharge into a water body of commercial fishing importance.

Reconstruction of Treatment Process for Papermaking Wastewater

2012 ◽  
Vol 518-523 ◽  
pp. 2704-2707
Author(s):  
Shu Na Wang ◽  
Xia Wang
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Treatment Process ◽  
Treatment System ◽  
Secondary Standard ◽  
Wastewater Discharge ◽  
Wastewater Treatment System ◽  
Paper Making ◽  
Process Reconstruction

To make full use of existing facilities , process reconstruction line is proposed including three precipitation, floatation and biological treatment after the analysis of the problems in existing treatment process of the paper-making wasterwater, The results showed that: after the reconstructive wastewater treatment system, the quality of effluent has reached the secondary standard of Integrated Wastewater Discharge Standard (GB8978-96).

scholarly journals The present situation and trends of wastewater treatment in small settlements and rural areas of Lithuania

2019 ◽  
pp. 243-250
Author(s):  
Regimantas Dauknys
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Surface Waters ◽  
Rural Areas ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Present Situation ◽  
Treatment Facilities ◽  
Biological Filters ◽  
Activated Sludge Systems

This article presents the wastewater treatment in small settlements and rural areas ofLithuania, including descriptions of capacity and loading of wastewater treatment plants(WWTPs), types of treatment facilities, and development trends of biological treatmentfacilities. In 2000 Lithuania had 597 WWTPs with capacity up to 1000 m3/d, 95% of them arethe biological treatment plants. Today the most of these WWTPs are unloaded due to thetendency to centralise wastewater treatment in rural areas of Lithuania that were in the eightand ninth decades.In small settlements and rural areas of Lithuania the aeration facilities are predominant. In theeight and ninth decades practically only the activated sludge systems were built. The situationbegan to change in the last decade of the last century: the biological filters and soil filtrationfacilities with discharge into surface waters were applied more frequently, so the building ofaeration facilities started to decrease.

One-Sludge Denitri-Nitrification System Application in Reconstruction of Biological Treatment Stations in Russian Federation

2015 ◽  
Vol 725-726 ◽  
pp. 1325-1331 ◽  
Author(s):  
Elena Gogina ◽  
Olga Ruzhitskaya
Keyword(s):  
Activated Sludge ◽  
Russian Federation ◽  
System Application ◽  
Biological Treatment ◽  
Stable System ◽  
Treatment Facilities ◽  
The Russian Federation

The paper presents the main problems and their solutions in the reconstruction of treatment facilities in the Russian Federation. The paper presents the results of research aimed the use of the stable system, which is based on nitrification activated sludge appliance, when the sludge contains bacteria-heterotrophic-nitrificators.

Wastewater release and its impacts on Canadian waters

2011 ◽  
Vol 68 (10) ◽  
pp. 1836-1859 ◽  
Author(s):  
Claire Holeton ◽  
Patricia A. Chambers ◽  
Laura Grace
Keyword(s):  
Wastewater Treatment ◽  
Human Health ◽  
Domestic Wastewater ◽  
Aquatic Organisms ◽  
Control Measures ◽  
Source Control ◽  
Wastewater Discharge ◽  
Untreated Wastewater ◽  
Treatment Facilities

Discharge of sewage to the environment in the form of treated or untreated wastewater can have serious impacts on human health and quality of life and on ecosystem condition. Since a previous review in 1997, upgrades to wastewater treatment facilities, along with improved source control, have produced successes in reducing loadings of certain pollutants (e.g., mercury, polychlorinated biphenyls) to Canadian waters. However, nationally, loads of phosphorus discharged from wastewater treatment facilities have not changed in recent years (2003–2008), and releases of nitrogen have increased slightly. In some locations, wastewater discharges are contributors to bacterial contamination, toxicity from heavy metals and ammonia, and eutrophication, all of which continue to threaten public and environmental health. An increasing number of studies are also demonstrating developmental, reproductive, and behavioural changes in fish and other aquatic organisms from exposure to pharmaceuticals, personal-care products, or other pollutants in domestic wastewater, even after treatment. Minimizing wastewater discharge and mitigating its effects on the environment and human health will be a challenge. It is critical that gains achieved by improved wastewater treatment and other control measures not be reversed by relaxation of efforts or by failure to keep pace with population growth.

scholarly journals BIOLOGICAL WASTEWATER TREATMENT IN CONTEXT OF CIRCULAR ECONOMY

2021 ◽  
Vol 29 (1) ◽  
pp. 3-10
Author(s):  
Yuliia Dzihora ◽  
Hennadiy Stolyarenko
Keyword(s):  
Wastewater Treatment ◽  
Circular Economy ◽  
Biological Treatment ◽  
Membrane Separation ◽  
Biogas Production ◽  
Human Life ◽  
Holistic Approach ◽  
Long Time ◽  
Treatment Facilities ◽  
Resources Exploitation

With the beginning of Anthropocene epoch, nature is facing a lot of environmental problems that drastically increased in the last century. On the current rate of resource consumption, soon nature will lose the ability for self-restoration. In order to avoid inevitable consequences of resources exploitation, new approaches should be developed in all areas of human life. Linear economy concepts that were utilized for a long time and were based on use and disposal of each separate resource depending on the purpose is not sufficient anymore. More holistic approach should be applied to overcome the challenges that we are facing now. Application of circular economy concepts for wastewater treatment facilities has a great potential to enhance sustainability of water management. This paper will focus on circular economy concepts applied for modern pilot installation that combines biological treatment and membrane separation and discusses the potential for the full-scale implementation. Since, pilot plant was operated without any chemicals addition it eases the use of the waste sludge that is received as a by-product for different purposes as agricultural application and biogas production.

scholarly journals Current Trends on Role of Biological Treatment in Integrated Treatment Technologies of Textile Wastewater

2021 ◽  
Vol 12 ◽  
Author(s):  
Maria Belen Ceretta ◽  
Débora Nercessian ◽  
Erika A. Wolski
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Membrane Filtration ◽  
Textile Wastewater ◽  
Integrated Treatment ◽  
Biological Processes ◽  
Wastewater Discharge ◽  
High Concentration ◽  
Treatment Technologies ◽  
Hazardous Compounds

Wastewater discharge is a matter of concern as it is the primary source of water pollution. Consequently, wastewater treatment plays a key role in reducing the negative impact that wastewater discharge produce into the environment. Particularly, the effluents produced by textile industry are composed of high concentration of hazardous compounds such as dyes, as well as having high levels of chemical and biological oxygen demand, suspended solids, variable pH, and high concentration of salt. Main efforts have been focused on the development of methods consuming less water or reusing it, and also on the development of dyes with a better fixation capacity. However, the problem of how to treat these harmful effluents is still pending. Different treatment technologies have been developed, such as coagulation-flocculation, adsorption, membrane filtration, reverse osmosis, advanced oxidation, and biological processes (activated sludge, anaerobic-aerobic treatment, and membrane bioreactor). Concerning to biological treatments, even though they are considered as the most environmentally friendly and economic methods, their industrial application is still uncertain. On the one hand, this is due to the costs of treatment plants installation and, on the other, to the fact that most of the studies are carried out with simulated or diluted effluents that do not represent what really happens in the industries. Integrated treatment technologies by combining the efficiency two or more methodologies used to be more efficient for the decontamination of textile wastewater, than treatments used separately. The elimination of hazardous compounds had been reported using combination of physical, chemical, and biological processes. On this way, as degradation products can sometimes be even more toxic than the parent compounds, effluent toxicity assessment is an essential feature in the development of these alternatives. This article provides a critical view on the state of art of biological treatment, the degree of advancement and the prospects for their application, also discussing the concept of integrated treatment and the importance of including toxicity assays to reach an integral approach to wastewater treatment.

Developing and Exploring for Treatment Technology of ADU Wastewater Containing High-Concentration Fluorine and Ammonia-Nitrogen

2016 ◽  
Author(s):  
Xingxing Tan ◽  
Ning Zhao
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Ammonia Nitrogen ◽  
Treated Wastewater ◽  
Preparation Process ◽  
Wastewater Discharge ◽  
High Concentration ◽  
Treatment Technology ◽  
Treatment Facilities ◽  
New Treatment

A set of new treatment facilities have been built to deal with the high-concentration of fluorine and ammonia-nitrogen (NH3-N) in wastewater generated from the preparation process of UO2 powder by ADU, whose concentration reaches up to 20g/L and 70g/L, respectively. Compared with various methods and summarized from vast experiences, a three-step technological process has been adopted. Firstly, fluorine is fixed by Ca(OH)2, and the product, CaF2, and other solids are filtered by centrifuge. And the teeny solids in the primary filtrate are precipitated by proper flocculants in pipe chute settling pond. Secondly, the treated wastewater with certain alkalinity is rectified by folded-plate rectifying tower. Meanwhile the ammonia is reused. Finally, adsorbed by specific adsorbent, the fluorine and NH3-N concentration of treated wastewater is further reduced. After numerous experiments and two-year running tests, the process control has been improved. Now, the wastewater treatment capability of the facility can reach 45m3/day. And the concentration of fluorine and NH3-N in the final wastewater is less than 10mg/L and 15mg/L, respectively, which can meet the state wastewater discharge standards. Besides, the concentration of the reused ammonia is raised from 5wt% to 25wt%, and the recovery can reach 99.3%.

Operational Indicators to Manage the Replacement of Electromechanical Equipment in Wastewater Treatment Facilities

2021 ◽  
pp. 1-20
Author(s):  
Vicent Hernández-Chover ◽  
Lledó Castellet-Viciano ◽  
Francesc Hernández-Sancho
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Replacement Policy ◽  
Optimal Management ◽  
Specific Domain ◽  
Different Types ◽  
Acquisition Costs ◽  
Treatment Facilities ◽  
Electromechanical Equipment

Optimal management is usually at the top of the concerns in the context of water infrastructures. In the specific domain of wastewater treatment plants (WWTPs), European Directive 91/271 established the need of implementing a biological treatment of wastewater leading to an intensive construction of WWTPs in several European countries, which now present important problems of maintenance. These facilities are composed of different types of assets, which should be managed efficiently in order to optimize the performance of the processes as well as the maintenance and replacement costs of the equipment. In fact, the deterioration of these assets increases the operational risk and endangers the continuity of the service of these WWTPs. In this paper, the authors combine multicriteria methodologies (MCDM) and economic aspects of the equipment to define an appropriate technical–economical replacement policy. With the aim of developing a reference procedure in the wastewater sector, an approach has been made to blower pump, which is an equipment widely used in WWTPs to provide a continuous air flow to the reactor facilitating the elimination of organic matter and the nutrients contained in the wastewater. The proposal integrates aspects such as acquisition costs and corrective maintenance, interest rate, and amortization based on the condition of the equipment.

Sign in / Sign up

Export Citation Format

Share Document