scholarly journals Activate sludge treatment of leachates from väätsa landfill, Estonia

2019 ◽  
pp. 237-248
Author(s):  
Mait Sooäär
Keyword(s):  
Activated Sludge ◽  
Organic Waste ◽  
Treatment Plant ◽  
Organic Content ◽  
Phosphorus Acid ◽  
First Year ◽  
Second Phase ◽  
Storage Site ◽  
Leachate Treatment ◽  
Activate Sludge Treatment

Vfilitsa Landfill is the first sanitary landfill in Estonia that meets the requirements of theEU landfill directive. The landfill is dimensioned to serve about 130 000 inhabitants.The first stage of landfill (out of seven) was accomplished in 2000. Disposal of wasteswas started in November 2000. By now, the landfill contains: one hectare large disposalsite for domestic waste, composting area for organic waste and storage site forconstruction wastes. In Estonia, the collection of recyclables has not jet developed. InVfilitsa landfill, however, waste paper, glass and plastic are sorted. Organic waste is notseparated on-site, and this is the reason why the organic content (nutritive waste) ofgarbage is high. Currently, the landfill serves approximately 40 000 inhabitants.According to the requirements of the client, Veemaailm INC designed and built a twophase activated sludge leachate treatment plant. First phase of the treatment, extendedaeration, takes place in a container. In order to adjust the concentrations of biogenesis,Ortho Phosphorus Acid is added to the leachate. During the first phase, concentrations ofpollutants are decreased approximately by 1/3. The second phase of purification takesplace in oxidation lagoon.The leachate treatment plant worked effectively throughout the first year, both during thesummer with high temperatures, and winter with low temperatures. During the firstoperating year, the main expenses were: energy for blowers, phosphorus acid for nutrientadjustment, and exchange oil for blowers. The analysis of the first operating year showsthat BOD has decreased more than 95%, COD approximately 90% and N on an average60 %. The activated sludge process also reduced the concentrations of some heavymetals.

Treatment of organic chlorine in pulping effluents by activated sludge

1999 ◽  
Vol 40 (1) ◽  
pp. 275-279 ◽  
Author(s):  
G. (Goktayoglu) Demirbas ◽  
C. F. Gokcay ◽  
F. B. Dilek
Keyword(s):  
Carbon Source ◽  
Activated Sludge ◽  
Treatment Plant ◽  
Organic Content ◽  
Domestic Sewage ◽  
Municipal Sewage ◽  
Removal Mechanism ◽  
Start Up ◽  
Organic Chlorine ◽  
Aox Removal

A model activated sludge (AS) plant was fed by pulping effluents from a straw and reed processing paper works. The model was initially operated to simulate a dedicated treatment plant by continuously receiving chlorinated effluents from the pulp bleachery. In this simulation cycle the model activated sludge was seeded only once during start-up and did not receive any domestic sewage after that. A carbon source was added in some of the experiments to bring up the organic content. In the second simulation cycle the pulping effluent was co-treated with municipal sewage. In this case the activated sludge unit was being continuously dosed by microorganisms and the organics present in the sewage. A higher organic chlorine (AOX) removal was obtained at shorter SRTs in the co-treatment AS. High AOX removal was achieved at longer SRTs in the dedicated, once-seeded AS. The AOX removal mechanism was mineralization in both cycles.

Improving the Performance of the Activated Sludge Process: A Time Controlled Flow Equalisation Basin

1978 ◽  
Vol 13 (1) ◽  
pp. 183-201
Author(s):  
N. Thérien ◽  
B. Marcos ◽  
G. Muratet
Keyword(s):  
Activated Sludge ◽  
Treatment Plant ◽  
Control Policy ◽  
Organic Content ◽  
Organic Substrate ◽  
Activated Sludge Process ◽  
Water Stream ◽  
Actual Case ◽  
Differential Model ◽  
Controlled Flow

Abstract The performance of a time controlled flow equalisation basin in minimizing the mean daily concentration of organic substrate flowing out the clarifier unit has been investigated. This was done considering fluctuations in both the flowrate and organic content of the entering raw water stream to an activated sludge process. A differential model apt at describing the dynamic behaviour of the activated sludge process of an existing wastewater treatment plant for periods of one to several days has been used. The control strategy, consisting in finding how much wastewater to pump in time from the basin to the aeration unit has been designed using iteration in control vector space with a second order minimization algorithm based on the concept of dynamic programming. Situations for which this procedure would lead to an optimal control policy are discussed and an actual case of this occuring is shown for the data gathered at the plant. The results obtained are also compared to more conservative and known control policies for the operation of an equalisation basin.

Enhancing filterability of activated sludge from landfill leachate treatment plant by applying electrical field ineffective on bacterial life

2017 ◽  
Vol 24 (11) ◽  
pp. 10364-10372 ◽  
Author(s):  
Gulizar Kurtoglu Akkaya ◽  
Elif Sekman ◽  
Selin Top ◽  
Ece Sagir ◽  
Mehmet Sinan Bilgili ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Landfill Leachate ◽  
Treatment Plant ◽  
Leachate Treatment ◽  
Electrical Field

scholarly journals Metagenomic Insights Into Functional and Taxonomic Compositions of an Activated Sludge Microbial Community Treating Leachate of a Completed Landfill: A Pathway-Based Analysis

2021 ◽  
Vol 12 ◽  
Author(s):  
Shohei Yasuda ◽  
Toshikazu Suenaga ◽  
Laura Orschler ◽  
Shelesh Agrawal ◽  
Susanne Lackner ◽  
...  
Keyword(s):  
Microbial Community ◽  
Activated Sludge ◽  
Mixed Culture ◽  
Landfill Leachate ◽  
Treatment Plant ◽  
Metabolic Potential ◽  
Leachate Treatment ◽  
Microbial Taxonomy ◽  
Engineered Systems ◽  
Metagenome Sequencing

Upcycling wastes into valuable products by mixed microbial communities has recently received considerable attention. Sustainable production of high-value substances from one-carbon (C1) compounds, e.g., methanol supplemented as an external electron donor in bioreactors for wastewater treatment, is a promising application of upcycling. This study undertook a gene-centric approach to screen valuable production potentials from mixed culture biomass, removing organic carbon and nitrogen from landfill leachate. To this end, the microbial community of the activated sludge from a landfill leachate treatment plant and its metabolic potential for the production of seven valuable products were investigated. The DNA extracted from the activated sludge was subjected to shotgun metagenome sequencing to analyze the microbial taxonomy and functions associated with producing the seven products. The functional analysis confirmed that the activated sludge could produce six of the valuable products, ectoine, polyhydroxybutyrate (PHB), zeaxanthin, astaxanthin, acetoin, and 2,3-butanediol. Quantification of the detected functional gene hit numbers for these valuable products as a primary trial identified a potential rate-limiting metabolic pathway, e.g., conversion of L-2,4-diaminobutyrate into N-γ-acetyl-L2,4,-diaminobutyrate during the ectoine biosynthesis. Overall, this study demonstrated that primary screening by the proposed gene-centric approach can be used to evaluate the potential for the production of valuable products using mixed culture or single microbe in engineered systems. The proposed approach can be expanded to sites where water purification is highly required, but resource recovery, or upcycling has not been implemented.

Investigation of a Bacteria-Enzyme Additive to Prevent Foaming in Activated Sludge Plants

1994 ◽  
Vol 29 (7) ◽  
pp. 281-284 ◽  
Author(s):  
A. Franz ◽  
N. Matsché
Keyword(s):  
Waste Water ◽  
Activated Sludge ◽  
Large Scale ◽  
Fats And Oils ◽  
Organic Content ◽  
Aeration Tank ◽  
Second Phase ◽  
Industrial Plants ◽  
Microthrix Parvicella ◽  
And Performance

Operating and performance problems arise when fats and oils are a major fraction of the organic content of the waste water. These problems are frequently associated with the presence of the microorganisms Nocardia spp. and Microthrix parvicella which can cause foaming of activated sludge plants. Bacteria and enzyme additives (B-E-additives) are produced by some companies who claim to prevent the growth of nocardioform actinomycetes by addition of these B-E-additives to the mixed liquor. In order to investigate these claims a research program for the control of sludge foaming was started using a commercial B-E-additive combatting these operational problems. The B-E-additive was investigated in batch experiments in laboratory scale (0.25-40 1) using mixed liquors from different plants (domestic and industrial plants). In a second phase the B-E-additive was applied on a large scale over extended periods in two different activated sludge plants. Plant A had a severe foaming problem due to waste water from a pet-food factory. Plant B treated mainly waste water of domestic origin. A continuous addition of the B-E-additive could not avoid a severe scum formation on the aeration tank after lipid loadings from industry. The addition of the B-E-additive caused a shift in the biocenosis from Nocardia spp. to Microthrix parvicella but did not influence the foam production in the plant. The addition of the B-E-additive in a plant with two identical, parallel-run activated sludge tanks where the product was only applied in one half of the plant, whereas the other unit served for control purpose, did not show significant differences. The results obtained during the investigations did not show any significant advantage in effective grease removal, foam control or aeration efficiency.

scholarly journals "Aeration Tank Behavior in the Activated Sludge Wastewater Treatment Plant Startup Conditions Case study; (Wastewater Treatment plant of General Mosul hospital- IRAQ)"

2013 ◽  
Vol 1 (1) ◽  
pp. 1-13
Author(s):  
Riyadh M. S. Al-Obaidi
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Organic Content ◽  
Aeration Tank ◽  
Surface Aeration ◽  
Start Up ◽  
Simple Growth

The biological unit in the wastewater treatment plants can be considered the most sensitive treatment units. It begins work with dynamic conditions for several weeks until reach the steady state conditions. Therefore, this study was done to observe aeration tank behavior (activated sludge unit) in the wastewater treatment plant of general hospital complex of Mosul city. Sampling made daily for more than 30 days. The biological treatment monitoring parameter was tested. The study shown that there is need to about 45-60 days to complete the start up work to be the operation stable and successful (if it worked without seeding). There was simple growth of microorganisms with modest treatment of organic matter, and then it rose after 3 first weeks of operation. There was contrary relationship between organic content and suspended solids in the aeration tank; an equation of this relation has been presented. The pH has risen in the first days in the effluent wastewater, then return to be less than influent pH with a relative relation with the activity of the microorganisms and surface aeration in the tank. The EC was simply reduced in the Effluent along with the study.

scholarly journals Impact of Effluent from the Leachate Treatment Plant of Taman Beringin Solid Waste Transfer Station on the Quality of Jinjang River

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1553
Author(s):  
Pui Mun Chin ◽  
Aine Nazira Naim ◽  
Fatihah Suja ◽  
Muhammad Fadly Ahmad Usul
Keyword(s):  
Activated Sludge ◽  
Solid Waste ◽  
River Water ◽  
System Performance ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Leachate Treatment ◽  
Activated Sludge System ◽  
Transfer Station ◽  
Waste Transfer

Rapid population growth has contributed to increased solid waste generated in Malaysia. Most landfills that have reached the design capacity are now facing closure. Taman Beringin Landfill was officially closed, so the Taman Beringin Solid Waste Transfer Station was built to manage the relocation, consolidation, and transportation of solid waste to Bukit Tagar Sanitary Landfill. Leachates are generated as a consequence of rainwater percolation through waste and biochemical processes in waste cells. Leachate treatment is needed, as leachates cause environmental pollution and harm human health. This study investigates the impact of treated leachate discharge from a Leachate Treatment Plant (LTP) on the Jinjang River water quality. The performance of the LTP in Taman Beringin Solid Waste Transfer Station was also assessed. Leachate samples were taken at the LTP’s anoxic tank, aeration tank, secondary clarifier tank, and final discharge point, whereas river water samples were taken upstream and downstream of Jinjang River. The untreated leachate returned the following readings: biochemical oxygen demand (BOD) (697.50 ± 127.94 mg/L), chemical oxygen demand (COD) (2419.75 ± 1155.22 mg/L), total suspended solid (TSS) (2710.00 ± 334.79 mg/L), and ammonia (317.08 ± 35.45 mg/L). The LTP’s overall performance was satisfactory, as the final treated leachates were able to meet the standard requirements of the Environmental Quality (Control of Pollution from Solid Waste Transfer Station and Landfill) Regulation 2009. However, the LTP’s activated sludge system performance was not satisfactory, and the parameters did not meet the standard limits. The result shows a low functioning biological treatment method that could not efficiently treat the leachate. However, a subsequent step of combining the biological and chemical process (coagulation, flocculation, activated sludge system, and activated carbon adsorption) helped the treated leachate to meet the standard B requirement stipulated by the Department of Environment (DOE), i.e., to flow safely into the river. This study categorized Jinjang River as polluted, with the discharge of the LTP’s treated leachates, possibly contributing to the river pollution. However, other factors, such as the upstream sewage treatment plant and the ex-landfill downstream, may have also affected the river water quality. The LTP’s activated sludge system performance at the transfer station still requires improvement to reduce the cost of the chemical treatment.

DESIGN PLANNING WASTEWATER TREATMENT PLANT OF NATA DE COCO INDUSTRY WITH THE ACTIVATED SLUDGE PROCESS

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Dinda Rita K. Hartaja ◽  
Imam Setiadi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Appropriate Technology ◽  
Waste Water Treatment Plant ◽  
Activated Sludge Process ◽  
High Level

Generally, wastewater of nata de coco industry contains suspended solids and COD were high, ranging from 90,000 mg / l. The high level of of the wastewater pollutants, resulting in nata de coco industry can not be directly disposed of its wastewater into the environment agency. Appropriate technology required in order to process the waste water so that the treated water can meet the environmental quality standards that are allowed. Designing the waste water treatment plant that is suitable and efficient for treating industrial wastewater nata de coco is the activated sludge process. Wastewater treatment using activated sludge process of conventional (standard) generally consists of initial sedimentation, aeration and final sedimentation.Keywords : Activated Sludge, Design, IPAL

EVALUATION OF BIOMETHANE YIELDS FROM HIGH-ENERGY ORGANIC WASTE AND SEWAGE SLUDGE: A PILOT STUDY FOR A WASTEWATER TREATMENT PLANT

2019 ◽  
Vol 18 (9) ◽  
pp. 2023-2034 ◽  
Author(s):  
Agnieszka A. Pilarska ◽  
Krzysztof Pilarski ◽  
Boguslawa Waliszewska ◽  
Magdalena Zborowska ◽  
Kamil Witaszek ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Pilot Study ◽  
Sewage Sludge ◽  
Wastewater Treatment Plant ◽  
Organic Waste ◽  
Treatment Plant ◽  
High Energy
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