scholarly journals INNOVATIVE METHOD OF NITRIFICATION AND DENITRIFICATION ON THE EXAMPLE OF WASTEWATER TREATMENT PLANT OF KOLOMYIA

2021 ◽  
Vol 2021 (2) ◽  
pp. 7-16
Author(s):  
Ihor Popadiuk ◽  
◽  
Ivan Matlai ◽  
Bohdan Pitsyshyn ◽  
Taras Sydor ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Phosphorus Compounds ◽  
Biological Wastewater Treatment ◽  
The European Union ◽  
Nitrogen And Phosphorus ◽  
Oxygen Conditions ◽  
Treatment Facilities ◽  
Degree Of Purification

The article is devoted to the unsatisfactory operation of biological wastewater treatment plants. At present in Ukraine there are no developments of equipment and devices to ensure the operation of treatment facilities using the technology of nitridenitrification of deep wastewater treatment from nitrogen and phosphorus compounds. The analysis of the equipment of biological treatment systems - nitri treatment plant - denitrifier, clarifier tanks is carried out. At the same time, the standards of the degree of purification of both Ukraine and the European Union were taken into account. On the example of treatment facilities in Kolomyia, Ivano-Frankovsk region, modern schemes of biological wastewater treatment for the removal of nitrogen and phosphorus have been proposed, namely, the re-equipment of single-corridor aerotanks into bioreactors of nitridenitrifiers by creating zones with different oxygen conditions in their volume.

Requirements with respect to on-line analyzers for N and P

1996 ◽  
Vol 33 (1) ◽  
pp. 139-146 ◽  
Author(s):  
S. Schlegel ◽  
P. Baumann
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Operating Costs ◽  
Phosphorus Compounds ◽  
Individual Treatment ◽  
Measuring Instruments ◽  
Nitrogen And Phosphorus ◽  
Code Of Practice ◽  
On Line

For some years now, measuring instruments have been employed at wastewater treatment plants in Germany to continuously monitor ammonia (NH4), nitrate (NO3) and phosphate (PO4). Altogether, almost 3,000 monitoring units are currently in use at a total of approximately 600 treatment plants of all sizes. In addition to continuously monitoring the treatment plant effluent and individual treatment processes, these allow the adjustment and control of plant units and, thus, a saving in operating costs, particularly with respect to the consumption of energy and chemicals. In addition to characteristic data on the instruments, investment and operating costs play a major role when deciding to purchase measuring instruments of this type. Therefore, the German Technical Wastewater Association's (ATV) working group on the “Automation of Wastewater Treatment Plants” resolved to prepare, within the framework of the ATV rules, a code of practice on “Requirements with respect to On-line Analyzers for Nitrogen and Phosphorus Compounds” (M 269). The purpose of this is to provide planners, operators and public authorities with advice on the design and reliable operation of on-line analyzers and the appurtenant peripheral equipment. The present text describes the essential contents of M 269.

Influence of Hydraulic Loading Rate on Horizontal Zeolite Wetland Effluent Quality

2012 ◽  
Vol 573-574 ◽  
pp. 659-662
Author(s):  
Hao Wang
Keyword(s):  
Wastewater Treatment ◽  
Loading Rate ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Secondary Effluent ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Hydraulic Loading Rate ◽  
Effluent Quality ◽  
Hydraulic Loading

In Tangshan area, the secondary effluent of wastewater treatment plants was used for this study. Horizontal zeolite wetland was carried out treating it. Hydraulic loading rate was the parameters for analyzing the nitrogen and phosphorus removal efficiency of pollutants from the secondary effluent of wastewater treatment plant. Zeolite constructed wetlands showed different behaviors for nitrogen and phosphorus removals.Under the optimum hydraulic loading rate, the primary pollutions were removed to a large extent.

Choice of the efficient flow diagram of biological wastewater treatment at municipal wastewater treatment plants

2021 ◽  
Vol 6 (4) ◽  
pp. 244-250
Author(s):  
Serhii Protsenko ◽  
◽  
Mykola Kizyeyev ◽  
Olha Novytska ◽  
◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
High Efficiency ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Dynamic Modelling ◽  
Flow Diagram ◽  
Biological Wastewater Treatment ◽  
Municipal Wastewater Treatment ◽  
Residual Content

The possibility of increasing the efficiency of municipal wastewater treatment plant (WWTP) operation by changing the flow diagram of biological wastewater treatment in aeration tanks at minimum expenses for their reconstruction is shown in the paper on the example of one of the regional centres of Ukraine. The technology of nitri-denitrification of wastewater according to the flow diagram of the two-stage modified Ludzak-Ettinger process is offered for the considered conditions. The distribution of wastewater flows and internal nitrate recycling between the individual stages of this flow diagram has been optimized in order to minimize the residual content of total nitrogen in the treated effluents. Computer dynamic modelling of biochemical processes has proved the high efficiency and reliability of the flow diagram proposed by the authors.

scholarly journals Effectiveness of wastewater treatment from the fruit and vegetable industry in the vertical flow-type constructed wetlands

2018 ◽  
Vol 44 ◽  
pp. 00149 ◽  
Author(s):  
Monika Puchlik
Keyword(s):  
Wastewater Treatment ◽  
Organic Compounds ◽  
Constructed Wetlands ◽  
Total Nitrogen ◽  
Organic Substance ◽  
Treatment Plant ◽  
Phosphorus Compounds ◽  
Vertical Flow ◽  
Fruit And Vegetable ◽  
Nitrogen And Phosphorus

The purpose of the work was to determine the effectiveness of wastewater treatment from the fruit and vegetable industry in constructed wetlands supported by a bio-preparation. An increase in the efficiency of organic substance purification expressed as BOD5 and COD by 8% in deposit with the addition of bio-preparation in relation to the control bed (without the addition of bio-preparation), was found. The efficiency of the total suspension, total nitrogen and total phosphorus increased respectively by 19.5%, 10%, and 27% in relation to the bed without addition of bio-preparation. Constructed wetlands treatment plant ensures high removal of organic compounds expressed as BOD5 and COD, as well as guarantees reduction in the concentration of nitrogen and phosphorus compounds.

scholarly journals The biomass, survival, reproductive and biomarker responses of Helix pomatia to soil contaminated with treated and untreated wastewater.

2021 ◽  
Author(s):  
Semase Matseleng ◽  
Ozekeke Ogbeide ◽  
Patricks' Otomo Voua
Keyword(s):  
Wastewater Treatment ◽  
Egg Production ◽  
Wastewater Treatment Plants ◽  
Helix Pomatia ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Invertebrate Fauna ◽  
Untreated Wastewater ◽  
Industrial Town ◽  
Treatment Facilities

Abstract Wastewater treatment facilities in developing countries like South Africa are major sources of contaminants via effluent into the environment, which could portend high toxicity risks for non-target flora and fauna. To this end, a study was conducted to determine the ecotoxicological responses of selected organism to treated and untreated wastewater from the wastewater treatment plants in an industrial town. The snail Helix pomatia was exposed to OECD artificial soil spiked with untreated or treated wastewater at the following concentrations: 0, 25, 50, 75, 100%. The ecotoxicological responses of Helix pomatia to wastewater were determined by assessing the biomass, survival, reproduction and biomarker responses (Catalase ‒ CAT and Acetylcholinesterase ‒ AChE activities). The overall results showed significant effects on the survival, reproduction and biomass of H. pomatia. Similar results were observed for juvenile emergence. An EC50 of 5.751% for egg production and an EC50 of 6.233% for juvenile emergence were determined in the untreated wastewater. Such indices could not be computed for the treated wastewater, indicating a decreased in toxicity between the untreated and the treated samples. For both the AChE and CAT activities, there was no statistical difference between treated and untreated wastewater treatments. The results from this study highlight the toxic effects of untreated wastewater and indicate that treated wastewater (effluent) released from the wastewater treatment plant in Phuthaditjhaba remains suitable for invertebrate fauna such as H. pomatia.

scholarly journals Operational characteristics of the paper factory's biological wastewater treatment facilities

2020 ◽  
Vol 17 (3) ◽  
pp. 162-167
Author(s):  
Yu. A. Feofanov ◽  
Keyword(s):  
Wastewater Treatment ◽  
Raw Materials ◽  
Treatment Plant ◽  
Organic Pollution ◽  
Oxidative Capacity ◽  
Biological Wastewater Treatment ◽  
Cleaning Efficiency ◽  
Operational Characteristics ◽  
Treatment Facilities ◽  
Paper And Pulp

The results of the biological wastewater treatment facilities of the paper factory using raw materials of different kinds (waste paper and pulp) are analyzed. The main performance characteristics of these structures (oxidative capacity for organic pollution and cleaning efficiency) at different loads on them have been determined. Recommendations have been worked out to improve the performance and efficiency of the treatment plant.

scholarly journals Water Treatment Emergency: Cost Evaluation Tools

2019 ◽  
Vol 11 (9) ◽  
pp. 2609 ◽  
Author(s):  
Giovanna Acampa ◽  
Maria Gabriella Giustra ◽  
Claudia Mariaserena Parisi
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Economic Feasibility ◽  
Cost Evaluation ◽  
The European Union ◽  
Construction Costs ◽  
Feasibility Assessment ◽  
Eu Member States ◽  
Electromechanical Equipment

The European Union is committed to enforce limitations to water pollution through specific directives (UWWTD 91/271/EEC). The delay of some EU member states in transposing these directives has had an impact on the quality of the wastewater treatment system. Therefore, it is necessary to intervene with adjustment procedures and construction of new plants. The aim of the study is to carry out an economic feasibility assessment for the construction costs of an urban wastewater treatment plant of medium-low capacity (<50,000 Population Equivalent or pe) according to a simplified process diagram, and help in the planning of new investments. We propose a methodology based on cost functions according to two different procedures: synthetic estimate of the costs for civil works and a multiple linear regression for the cost of the electromechanical equipment. These functions show a correlation between the construction costs and the population equivalent and enable us to understand it. The results show greater economic benefit in increasing wastewater treatment plants sizes serving a population equivalent of 5000 pe to 10,000 pe, while further increases are less beneficial.

scholarly journals Activated Sludge Microbial Community and Treatment Performance of Wastewater Treatment Plants in Industrial and Municipal Zones

2020 ◽  
Vol 17 (2) ◽  
pp. 436 ◽  
Author(s):  
Yongkui Yang ◽  
Longfei Wang ◽  
Feng Xiang ◽  
Lin Zhao ◽  
Zhi Qiao
Keyword(s):  
Wastewater Treatment ◽  
Microbial Community ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Community Diversity ◽  
Nitrogen And Phosphorus ◽  
Metabolic Functions

Controlling wastewater pollution from centralized industrial zones is important for reducing overall water pollution. Microbial community structure and diversity can adversely affect wastewater treatment plant (WWTP) performance and stability. Therefore, we studied microbial structure, diversity, and metabolic functions in WWTPs that treat industrial or municipal wastewater. Sludge microbial community diversity and richness were the lowest for the industrial WWTPs, indicating that industrial influents inhibited bacterial growth. The sludge of industrial WWTP had low Nitrospira populations, indicating that influent composition affected nitrification and denitrification. The sludge of industrial WWTPs had high metabolic functions associated with xenobiotic and amino acid metabolism. Furthermore, bacterial richness was positively correlated with conventional pollutants (e.g., carbon, nitrogen, and phosphorus), but negatively correlated with total dissolved solids. This study was expected to provide a more comprehensive understanding of activated sludge microbial communities in full-scale industrial and municipal WWTPs.

Automation of a Petroleum Refinery Wastewater Treatment Plant:A Case Study

1989 ◽  
Vol 24 (3) ◽  
pp. 451-462
Author(s):  
Robert J. Shantz ◽  
Virginia B. Erickson
Keyword(s):  
Wastewater Treatment ◽  
Control System ◽  
Wastewater Treatment Plants ◽  
Computer Control ◽  
Treatment Plant ◽  
Oil Refinery ◽  
Operating Costs ◽  
Computer Control System ◽  
Treatment Facilities ◽  
Labor Requirements

Abstract Historically, automation was not considered for wastewater treatment plants because it did not significantly affect operating costs, and manual plant operation was considered acceptable. Despite past practices, the BP Oil Refinery at Marcus Hook, Pennsylvania set a new standard when they began upgrading their wastewater facility in 1985. By automating the plant, they ensured safe, reliable operation with minimum labor requirements, process optimization, and long-term reductions in operating costs. Major design features included: a distributed computer control system with monitoring and supervisory capabilities; high-quality control system instruments; control system components; and redundancy and backup to support operation if a component or power failure occurs. In addition, design control philosophies remained consistent from predesign to startup. This advanced wastewater treatment plant can serve as a model for automation of future industrial treatment facilities.

Introduction of membrane technologies at the wastewater treatment facilities of Molodezhnoe settlement

2021 ◽  
pp. 26-32
Author(s):  
В.А. Кузьмин ◽  
О.А. Ломинога ◽  
Е.Г. Колоскова
Keyword(s):  
Wastewater Treatment ◽  
Membrane Filtration ◽  
Colloidal Particles ◽  
High Efficiency ◽  
Treatment Plant ◽  
Phosphorus Compounds ◽  
Design Parameters ◽  
Aeration Tank ◽  
Membrane Unit ◽  
Treatment Facilities

Представлен опыт внедрения технологии мембранной очистки сточных вод на канализационных очистных сооружениях поселка Молодежное (Санкт-Петербург). В состав очистных сооружений входят: главная насосная станция, комбинированная установка механической очистки сточных вод, усреднитель, биореактор (аэротенк, работающий по технологии нитри-денитрификации) для глубокого удаления азота, мембранный биореактор, установка ультрафиолетового обеззараживания сточных вод, шнековый пресс обезвоживания избыточного активного ила, станция дозирования реагента сульфата алюминия для химического удаления фосфорных соединений (фосфатов). Очищенные и обеззараженные сточные воды сбрасываются через глубоководный выпуск в Финский залив. Мембранная фильтрация обеспечивает глубокую доочистку от мелкодисперсных взвешенных веществ и коллоидных частиц. Для достижения стабильного качества очищенных сточных вод при эксплуатации мембранных модулей необходимо строго выполнять следующие требования: высокая эффективность удаления отбросов на решетках; предотвращение попадания посторонних включений в биореактор после механической очистки; обеспечение высокой концентрации ила в аэротенке и мембранном блоке; своевременная химическая промывка мембран. В ходе опытной эксплуатации очистных сооружений пос. Молодежное была отмечена неравномерность нагрузки как гидравлической, так и по загрязняющим веществам. За период эксплуатации были отлажены режимы работы станции с учетом неравномерности характеристик поступающего стока с выходом на проектные параметры технологической линии очистки сточных вод. The experience of introducing membrane wastewater treatment technology at the wastewater treatment facilities in Molodezhnoe settlement (St. Petersburg) is presented. The treatment facilities include: a main pumping station, a combined mechanical wastewater treatment plant, a wastewater regulator, a bioreactor (aeration tank operating using nitri-denitrification technology) for enhanced nitrogen removal, a membrane bioreactor, an ultraviolet effluent disinfection unit, a screw press for excess activated sludge dewatering, aluminum sulfate dosing unit for the chemical removal of phosphorus compounds (phosphates). The effluent after disinfection is discharged through a deep-water outlet into the Gulf of Finland. Membrane filtration provides for the enhanced tertiary treatment to remove fine suspended solids and colloidal particles. To achieve a stable quality of the effluent during the operation of membrane modules, the following requirements shall be strictly met: the high efficiency of screenings removal; prevention of the ingress of foreign particles into the bioreactor after mechanical treatment; high concentration of sludge in the aeration tank and membrane unit; timely chemical washing of the membranes. During the trial operation of the treatment facilities in Molodezhnoe, the irregular hydraulic and pollution loading was noted. During the operation period the operating modes of the facilities were adjusted with account of the irregular characteristics of the incoming flow while achieving the design parameters of the process line of wastewater treatment.

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