scholarly journals Evaluation of physical-chemical and biological treatment of shale oil retort water

1982 ◽  
Author(s):  
B.W. Mercer ◽  
M.J. Mason ◽  
R.R. Spencer ◽  
A.L. Wong ◽  
W. Wakamiya
Keyword(s):  
Biological Treatment ◽  
Shale Oil ◽  
Physical Chemical

scholarly journals Caracterização físico-química e microbiológica do esgoto da UEPB com proposta de tratamento para fins de reuso

2015 ◽  
Vol 10 (3) ◽  
pp. 54
Author(s):  
M. U. Sousa ◽  
L. M. R. Lima
Keyword(s):  
Biological Treatment ◽  
Ammonia Nitrogen ◽  
Preliminary Treatment ◽  
Microbiological Analysis ◽  
State University ◽  
Physical Chemical ◽  
Appropriate Treatment ◽  
Microbiological Characteristics ◽  
Receive Treatment

<p>Nos últimos anos, a preocupação com as questões ambientais vem sendo bastante discutidas, onde merece destaque, o descarte indevido do esgoto doméstico no meio ambiente, portanto o presente estudo objetivou realizar a caracterização físico-química e microbiológica do esgoto descartado no solo, no Centro de Ciências e Tecnologia da Universidade Estadual da Paraíba, campus de Campina Grande – PB. Para tanto foram desenvolvidas análises físico-químicas, tais como pH, Fósforo Total, DBO, DQO, Nitratos, Nitritos, Nitrogênio Amoniacal, Orto-Fosfatos e Alcalinidade, bem como análise microbiológica (coliformes). Observou-se que o efluente na unidade em questão não recebe tratamento para seu descarte, sendo identificadas características físico-químicas e microbiológicas de esgoto <em>in natura</em>. Faz-se necessário desta forma, investimentos em análises periódicas para assim realizar um tratamento adequado ao efluente visando-se reduzir os riscos ambientais e de saúde pública. Após os resultados das análises, foi proposto, além do tratamento preliminar, um tratamento biológico para o efluente, do tipo, lagoa facultativa primária seguida de duas lagoas de maturação, onde a eficiência do tratamento nos parâmetros analisados se enquadra aos padrões estabelecidos pelo CONAMA 430/2011, na qual o efluente pós - tratado poderia ser reutilizado para fins menos nobres, destinando a água potável para atividades que requerem uma qualidade melhor.</p><p><strong><em>Physicochemical and microbiological characterization of wasterwater of the UEPB with proposed of treatment for reuse purposes</em></strong></p><p><strong>Abstract</strong><strong>: </strong>In recent years, concern about environmental issues has been widely discussed, which deserves mention the improper disposal of domestic sewage into the environment, so this study aimed to perform the physicochemical and microbiological sewage discarded the soil, in the Science and Technology Center of the State University of Paraiba, campus of Campina Grande - PB. Therefore, we developed physical-chemical analysis such as pH, Total Phosphorus, BOD, COD, Nitrate, Nitrite, Ammonia Nitrogen, Orto-Phosphates and alkalinity, as well as microbiological analysis (coliforms). It was noted that the effluent in the unit in question does not receive treatment for their disposal, identified physical, chemical and microbiological characteristics of raw sewage. It is necessary therefore, investment in periodic reviews thus to carry out an appropriate treatment to effluent aiming to reduce environmental risks and public health. After the analysis results, it was proposed, in addition to preliminary treatment, a biological treatment for the effluent, type, primary facultative pond followed by two ponds maturation, in which the treatment efficiency in the analyzed parameters falls within the standards set by CONAMA 430/2011 in which the effluent post-treaty could be reused for less noble purposes, intended to clean water for activities that require a better quality<strong>.</strong></p>

scholarly journals Hazards and Improvement Measures of Microplastic Pollution: A Review

2021 ◽  
Vol 257 ◽  
pp. 03006
Author(s):  
Quan Gan ◽  
Jinxiao Tian ◽  
Zhixin Li ◽  
Shiyu Mi ◽  
Wenmin Wang
Keyword(s):  
Biological Treatment ◽  
Waste Treatment ◽  
Small Diameter ◽  
Advantages And Disadvantages ◽  
Physical Chemical ◽  
Improvement Measures ◽  
Treatment Technologies ◽  
The Common ◽  
Handling Methods ◽  
Waste Accumulation

Microplastics is one category of plastics with relatively small diameter and is considered as the common ingredient of waste accumulation zone in oceans. However, since countless plastic products are emitted into oceans annually as waste all around the world, pollution caused by them is severe and the resulting problems have attracted attention globally, while current policies and cooperation around the globe for tackling microplastics pollution still need to be improved. To deal with microplatics-related problems in the ocean, our review first discussed the toxicity of microplastics based on previous research related to marine microplastics, which was caused by the plastics themselves and their leaching substances with impacts on marine creatures and human body along the food chain. After summarizing some measures that have been already performed, we suggested that the authority should take more actions to mitigate those problems resulted from microplastics, pay more attention on researching, and encourage citizens to offer their proposals. By finally analyzing the advantages and disadvantages of different handling methods, as well as physical, chemical, and biological treatment technologies on oceanic microplastic issues, our work provided experience on disposing microplastics waste under various actual situations with an example for more holistic waste treatment.

scholarly journals INFLUENCE OF LANDFILL DEPOSITION OF MUNICIPAL SOLID WASTE ON GROUND AND SURFACE WATERS

2011 ◽  
Vol 1 (1) ◽  
pp. 62-66
Author(s):  
L. N GUBANOV ◽  
A. Yu ZVEREVA ◽  
V. I ZVEREVA
Keyword(s):  
Surface Waters ◽  
Biological Treatment ◽  
High Capacity ◽  
Negative Influence ◽  
Water Levels ◽  
Second Stage ◽  
Microbiological Processes ◽  
Physical Chemical ◽  
Stage Scheme ◽  
Harmful Substances

Most landfills dont meet the requirements for the terms of waste disposal and are just dumps without any engineering infrastructure protecting biosphere objects from polluting. Chemical and microbiological processes occurring in the municipal solidwaste mass lead to the formation of harmful substances polluting water objects. The designs of landfills MSW should have a two-stage scheme of wastewater treatment. The first stage of treatment is done in ponds-regulators of high capacity by homogenisation, dilution and long-lasting settling of wastewater. The second stage of treatment is performed on plants of physical-chemical and biological treatment. Negative influence of the rest harmful substancesdecreases if there is a big enough natural biochemical barrier between the water wall and the nearest water-bearing level, i.e. if the basement of the landfill has rocks that can effectively prevent pollutants taking out to ground water levels.

Protocol for Source Toxicity Evaluation

1992 ◽  
Vol 25 (3) ◽  
pp. 45-54 ◽  
Author(s):  
W. W. Eckenfelder ◽  
P. W. Lankford
Keyword(s):  
United States ◽  
Biological Treatment ◽  
Aquatic Toxicity ◽  
The United States ◽  
Design Parameters ◽  
Priority Pollutants ◽  
Toxicity Evaluation ◽  
Industrial Wastewaters ◽  
Physical Chemical ◽  
Treatment Design

Recent legislation in the United States is placing emphasis on the removal of priority pollutants and aquatic toxicity from industrial wastewaters. A protocol has been developed to select candidate technologies for specific effluent objectives. Wastewaters which are non-biodegradable and toxic are designated for source treatment. Design parameters for biological treatment are developed using a modified FBR test. The applicability of alternative physical-chemical technologies are discussed.

Enhancement of Biotreatment Effluent Quality by Illuminated Titanium Dioxide and Membrane Pretreatment of the Kraft Extraction Waste Stream and by Increased Chlorine Dioxide Substitution

1994 ◽  
Vol 29 (5-6) ◽  
pp. 209-218 ◽  
Author(s):  
R. A. Sierka ◽  
C. W. Bryant
Keyword(s):  
Chlorine Dioxide ◽  
Biological Treatment ◽  
Substantial Reduction ◽  
Oxygen Demand ◽  
Heterogeneous Photocatalysis ◽  
Chemical Product ◽  
Effluent Quality ◽  
Physical Chemical ◽  
Organic Chloride ◽  
Membrane Pretreatment

Changes in kraft bioeffluent quality were evaluated as a function of increased chlorine dioxide (ClO2) substitution, and ultrafiltration (UF) membrane and heterogeneous photocatalysis (HP) treatment of extraction (E-stage) wastewater prior to aerobic biological treatment. An increase from 10% to 50% ClO2 substitution in the bleaching of softwood produced a more readily biodegradable waste and an improved bioeffluent quality, especially with respect to toxicity and absorbable organic chloride (AOX). All UF-HP treatments of E-stage wastewater from 10% ClO2 substitution resulted in significant improvements in aerobic bioeffluent with regard to all measured parameters. The best physical/chemical product never corresponded to the best final bioeffluent, indicating some important modification of pollutant biodegradability during the membrane/photocatalysis process. Enhanced treatment of E-stage wastewater from 50% ClO2 substitution also resulted in significant improvements in aerobic bioeffluent with regard to total organic carbon (TOC), chemical oxygen demand (COD), and color, moderate improvement of toxicity, but no substantial reduction in AOX.

Study of the Treatment of Coking Wastewater by Biological Nitrogen Removal with Physical-Chemical Process

2011 ◽  
Vol 383-390 ◽  
pp. 3729-3733 ◽  
Author(s):  
Ya Er Ba ◽  
Zi Fu Li
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Treatment Plant ◽  
First Grade ◽  
Special Treatment ◽  
Biological Nitrogen Removal ◽  
Coking Wastewater ◽  
Physical Chemical ◽  
Treatment Agent ◽  
Biological Nitrogen

Coking wastewater component complex is difficult to treat and yet unable to achieve the emission target by biological treatment, thus needs further processing. Wastewater treatment plant of coking plant in Bao Gang applied A/O process in biological treatment, used special treatment agent -M180 by coagulation and sedimentation process. Through treatment, the parameters reached the first grade of GB13456-92. It is of great reference significance for process debug and operation of the coking wastewater treatment system.

scholarly journals Modelamiento del tratamiento biológico de aguas residuales; estudio en planta piloto de contactores biológicos rotatorios.//Modeling of biological wastewater treatment; study in pilot plant of rotating biological contactors.

Ciencia Unemi ◽  
2018 ◽  
Vol 11 (28) ◽  
pp. 88-96
Author(s):  
Paola Jackeline Duque Sarango ◽  
Catherinne Heras-Naranjo ◽  
Diana Lojano-Criollo ◽  
Tony Viloria
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Comparable Result ◽  
Chemical Parameters ◽  
K Value ◽  
Substrate Degradation ◽  
Physical Chemical ◽  
Rotating Biological Contactors

El presente trabajo estudió el rendimiento del tratamiento biológico mediante un sistema de Contadores Biológicos Rotatorios (CBR) construido a nivel de laboratorio de la Universidad Politécnica Salesiana. Para ello se utilizaron aguas residuales obtenidas de la Planta de Tratamiento de Aguas Residuales de Ucubamba-Cuenca, se llevó  a cabo un control y operación mediante la medición de parámetros físico químicos; nitratos, nitritos, cloro, amonio, pH, conductividad, sedimentación, turbidez y demanda química de oxígeno. Para luego establecer el modelo cinético de degradación del sustrato y validación del mismo, con los datos obtenidos en el laboratorio. Finalmente, los resultados experimentales fueron comparados con el modelo teórico, obteniéndose un resultado comparable entre ambos; se comprobó un ajuste experimental con un valor k (coeficiente de degradación de la materia orgánica) igual a 0,056 y con un R2 de 0,85 y 0,97 en el modelo teórico y experimental respectivamente. AbstractThe present work studied the performance of the biological treatment through a system of Rotating Biological Counters (RBC) built at the laboratory of the Universidad Politécnica Salesiana. Wastewater obtained from the Wastewater Treatment Plant of Ucubamba-Cuenca was used, the control and operation was carried out by measuring physical-chemical parameters; nitrates, nitrites, chlorine, ammonium, pH, conductivity, sedimentation, turbidity and chemical oxygen demand. Next, the kinetic model of substrate degradation was established and validation of the model was done with the data obtained in the laboratory. Finally, the experimental results were compared with the theoretical model, obtaining a comparable result between both; an experimental fit was verified with a k value (coefficient of degradation of organic matter) equal to 0,056 and with an R2 of 0.85 and 0.97 in the theoretical and experimental model respectively.

scholarly journals Evaluation of Remediation Technologies for Plutonium Contaminated Soil

2001 ◽  
Author(s):  
Steve L. Hoeffner ◽  
James D. Navratil ◽  
Richard Smalley
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Biological Treatment ◽  
Test Site ◽  
Chemical Characteristics ◽  
Nevada Test Site ◽  
Burial Site ◽  
Treatment Processes ◽  
Physical Chemical ◽  
Physical And Chemical

Abstract This paper provides a summary of the physical and chemical characteristics of plutonium contaminated soils from the Nevada Test Site (NTS). The NTS desires to decrease the amount of plutonium-contaminated soils that must be transported and disposed at the burial site. Volume reduction of these plutonium-contaminated soils has been attempted using various physical, chemical and biological treatment processes. Results of these trials are presented.

Physical-Chemical Methods of Treatment for Oil-Containing Effluents

1982 ◽  
Vol 14 (9-11) ◽  
pp. 1195-1207 ◽  
Author(s):  
F Berné
Keyword(s):  
Biological Treatment ◽  
Oil Removal ◽  
Chemical Methods ◽  
Treatment Unit ◽  
Dissolved Air Flotation ◽  
Hydrocarbon Content ◽  
Physical Chemical ◽  
Pipe Line ◽  
Methods Of Treatment ◽  
Dissolved Air

After a preliminary oil-removal by gravity in various types of oil-separators, the effluents from pipe-line terminals, de-ballasting units and refineries still contain, as a stable emulsion, significant residual hydrocarbon concentrations, varying from 25 to 300 mgl. In order to bring these effluents to comply with the regulations governing their discharge either to the sea or to a river, or simply to be able to send them to a complementary biological treatment unit, it is necessary to submit such effluents to a polishing oil-removal process; such process, often called physical-chemical treatment, is necessary to remove the above mentioned residual, insoluble hydrocarbons and leave the soluble hydrocarbons only. Practically and depending on the case considered, the final total hydrocarbon content obtained should not exceed from 5 to 20 mgl−1. For this, there are several techniques based on dissolved air flotation, or filtration. These respective processes and their results are summarized hereafter by the authors who gathered them from experiments conducted on pilot plants and, most of all, from numerous industrial treatment plants in Europe and in America.

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