The wastewater treatment

In Handbook of Water and Wastewater Treatment Plant Operations , the intent of the author is twofold. The Þrst intent is to consolidate the information and experience in waterworks and wastewater treatment plant operations that have evolved as a result of technological advances in the Þeld, and as a result of the concepts and policies promulgated by the environmental laws and the subsequent guidelines.

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This book is intended to provide an introduction to the technical concepts of wastewater treatment. It assumes that the reader has at least a first-year undergraduate level of scientific understanding but not necessarily any previous knowledge of wastewater treatment. A reading list is provided at the end of the book for more in-depth information on the topics that are introduced here. The authors are based in the United Kingdom and therefore the scientific units and terminology that are used in this book are those which are common in that country....

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Taking military barracks wastewater treatment as an example, this paper presents a new concept design of a modified DEWATS system with both the horizontal subsurface constructed wetland and aquatic plants pond. Results show that this process in treating the military barracks area wastewater have many advantages such as low operation cost, simple operation and maintenance, and the effluent could meet "the urban wastewater treatment plant pollutant discharge standard" for first level Class A.

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This study suggested recovering energy from the sludge of wastewater treatment plants through an anaerobic fermentation process. Sludge from wastewater treatment plants of fish processing factory (C) and shrimp processing factory (T) were collected for the testing of this study.

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The main objective of this study was to examine the efficacy and capacity of using hydroponic systems in municipal pollutant removal at household scale. Three pilot scaled hydroponic systems [dimension for each system: 4.5 m (L) x Φ 114 mm] were installed to investigate the optimal age of vegetable, planting density and retention time for household wastewater treatment, respectively.

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This volume covers the technologies that are applied to the treatment and purification of water. Those who are generally familiar with this field will immediately embrace the subject as a treatise on solid-liquid separations. However, the subject is much broader, in that the technologies discussed are not just restricted to pollution control hardware that rely only upon physical methods of treating and purifymg wastewaters.

654p p_ngoc_cs 17-05-2011 312 135   Download

To properly operate a waterworks or wastewater treatment plant and to pass the examination for a waterworks/wastewater operator’s license, it is necessary to know how to perform certain calculations. In reality, most of the calculations that operators at the lower level of licensure need to know how to perform are not difÞcult, but all operators need a basic understanding of arithmetic and problem-solving techniques to be able to solve the problems they typically encounter.

569p crazy_sms 10-05-2012 117 53   Download

The use of aeration in the wastewater treatment field has been in existence for over a century. Each of the authors has been involved with the theory and application of aeration systems for a little less than half a century. It was a daunting task to put together what we considered the important principles underlying the mechanisms involved in aeration and show how they are applied in practical applications.

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The Third Edition of this classic reference provides readers with concise, up-to-the-moment coverage of the role of microorganisms in water and wastewater treatment. By providing a solid foundation in microbiology, microbial growth, metabolism, and nutrient cycling, the text gives readers the tools they need to make critical decisions that affect public health, as well as the practical aspects of treatment, disinfection, water distribution, bioremediation, and water and wastewater reuse.

765p vunangnhat 21-04-2015 40 13   Download

This book examines the practices used or considered for biological treatment of waterlwastewater and hazardous wastes. The technologies described involve conventional treatment processes, their variations, as well as recent research. The book is intended for those seeking an overview of the field, and covers the major topics. The book is divided into five principal sections, and references are provided for those who wish to dig deeper.

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Oily wastewater discharged from machinery producing, mining, storage service, marine transporting... is one of the polluting sources to receiving waterbody. Adsorption onto carbonized material derived from agricultural by-products are proved to be the promising treatment for this type of wastewater.

7p jangni 13-04-2018 15 0   Download

As a conventional treatment process, centrifugal dewatering of sludge required an additional energy of 1,376 kWh per day for recycling, pumping, mixing as well as transporting sludge. The conclusion was that anaerobic digestion can reduce the green-house gases versus conventional dewatering. The results from this research can thus demonstrate the applicability of anaerobic digestion on conversion of waste to energy, looking forward to resource recovery.

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In this article, wastewater containing 2,4,6 trinitrotoluen (TNT) was treated by internal microelectrolysis with bimetal Fe-Cu materials. Components of TNT pollutant content was identified by HPLC method. Examined factors: pH, time, temperature, concentration of Fe-Cu bimetal to efficient treatment of TNT in the wastewater. With conditions at pH 5, bimetal Fe-Cu dosage of 50 g for l litre of wastewater, TNT original content in the wastewater infected about 95-106.4 mg/l, temperature of 25 0 C, after 6 hours of processing time, content TNT rest 0.2 - 0.5 mg/l, after 6 hours not observed.

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A hybrid biological reactor (HBR) which contained both suspended- and attached-growth biomass was developed by introducing sponge materials into a regular activated sludge unit and used for the treatment of seafood processing wastewater.

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The purpose of this study is to examine the effects of sludge retention time on the biomass characteristics in a lab-scale MBR treating domestic wastewater, including (i) the sludge bioactivity which was characterized by the specific oxygen uptake rate; (ii) sludge particle size distribution; (iii) sludge settling index. In addtion, the organic removal in the system was also evaluated.

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In this research, we focused on monitoring the concentration of nine pharmaceutical residues which are frequently detected in surface water, in 4 effluents of WWTPs in France from 2011 to 2012. Moreover, the photodegradation of these compounds in both ultrapure water and river water under solar light was also performed.

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(BQ) Contniued part 1, part 2 of the document Health engineering environmental in the tropics has contents: Excreta disposal in low and middle income countries, types of excreta disposal system, planning a sanitation programme, wastewater treatment,... and other contents. Invite you to refer.

231p thuongdanguyetan06 06-06-2019 7 0   Download

Untreated wastewater from slaughterhouses has been contributing to the contamination of Day River due to its high concentration of COD, BOD, total nitrate (TN) and total phosphate (TP). Centralized wastewater treatment is not a good option at present due to lack of wastewater conveyance infrastructure and finance. On-site wastewater treatment has been emerging a better choice.

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