Image analysis application for the study of activated sludge floc size during the treatment of synthetic and real fishery wastewaters.

15:49 EDT 31st August 2015 | BioPortfolio

Summary of "Image analysis application for the study of activated sludge floc size during the treatment of synthetic and real fishery wastewaters."

Fishery wastewater treatment can be compromised due to seasonal production. The use of sequencing batch reactors is not completely successful, despite flexibility being one of the principal advantages. Most research on activated sludge is performed using synthetic wastewater to ensure a stable and constant feed. The current work compared biomass morphology and settling ability using image analysis of synthetic and real fishery wastewaters, with and without NaCl addition.
The final effluent presented higher turbidity for both wastewaters after NaCl addition, and lower SVI values. For synthetic wastewater, NaCl addition led to the total aggregates' area (TA) increase from 1.46 to 2.09 mm(2)/μL, alongside the growth of intermediate aggregates into larger aggregates. The addition of NaCl to the fishery wastewater led to a decrease of the TA from 4.43 to 1.72 mm(2)/μL. The biomass composition decreased in larger and intermediate structures, opposite to the smaller aggregates' area percentage increase.
NaCl addition to synthetic wastewater incited flocculation increasing sludge settling ability. A slight aggregate disruption was responsible for a turbidity increase. A strong deflocculation was identified in fishery wastewater with NaCl from the decrease of intermediate and large aggregates. This contrasted with pinpoint flocs release, which increased the turbidity levels. CONCLUSIONS, RECOMMENDATIONS, AND
It could be established that synthetic wastewater biomass flocculation and fishery wastewater biomass deflocculation, observed during 0.5% NaCl experiments, were related to sludge settling and effluent turbidity changes. Furthermore, the biomass changes obtained with synthetic wastewater cannot be extrapolated to fishery wastewater.


IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal.

Journal Details

This article was published in the following journal.

Name: Environmental science and pollution research international
ISSN: 1614-7499


PubMed Articles [46927 Associated PubMed Articles listed on BioPortfolio]

Integrating activated sludge floc size information in MBR fouling modeling.

Although studied extensively, modeling fouling phenomena in membrane bioreactors (MBRs) remains challenging. It has been well established that cake layer formation and pore blocking have a strong impa...

Evaluation of Dewatering Performance and Fractal Characteristics of Alum Sludge.

The dewatering performance and fractal characteristics of alum sludge from a drinking-water treatment plant were investigated in this study. Variations in residual turbidity of supernatant, dry solid ...

Seasonal changes in the body size of two rotifer species living in activated sludge follow the Temperature-Size Rule.

Temperature-Size Rule (TSR) is a phenotypic body size response of ectotherms to changing temperature. It is known from the laboratory studies, but seasonal patterns in the field were not studied so fa...

Entrapped elemental selenium nanoparticles affect physicochemical properties of selenium fed activated sludge.

Selenite containing wastewaters can be treated in activated sludge systems, where the total selenium is removed from the wastewater by the formation of elemental selenium nanoparticles, which are trap...

Floc properties of polyaluminum ferric chloride in water treatment: The effect of Al/Fe molar ratio and basicity.

Producing flocs with desired properties is significant for contaminants removal in water treatment works. In this study, an inorganic composite coagulant, polyaluminum ferric chloride (PAFC), was prep...

Clinical Trials [3546 Associated Clinical Trials listed on BioPortfolio]

Clinical Application of Image Guided Liver Surgery

Image-guided surgery is a new technology, which is used to create 3-D pictures that generate a map of the liver. This map will allow surgeons to know the exact anatomical location of their...

Diagnosis of Intestinal Motility by Image Analysis Using Capsule Endoscopy

Conventional intestinal manometry is the current gold standard for the evaluation of intestinal motility, and identifies patterns of intestinal dysmotility. However intestinal manometry in...


The aim of this study is to develop a predictive model of risk of developing melanoma. We will used artificial intelligence techniques to analysed images patterns obtained by clinical and ...

Digital Image Analysis and Fluorescent In Situ Hybridization in Predicting Development of Esophageal Cancer in Patients With Barrett Esophagus

RATIONALE: Diagnostic procedures, such as digital image analysis and fluorescent in situ hybridization, may help doctors learn the extent of Barrett esophagus. PURPOSE: This randomized ph...

Investigation of the Efficacy and Safety of Drotrecogin Alfa (Activated) in Pediatric Severe Sepsis

The purposes of this study are to determine: 1. Whether drotrecogin alfa (activated) helps children with severe sepsis survive their condition more often or recover faster than chi...

Medical and Biotech [MESH] Definitions

A technique encompassing morphometry, densitometry, neural networks, and expert systems that has numerous clinical and research applications and is particularly useful in anatomic pathology for the study of malignant lesions. The most common current application of image cytometry is for DNA analysis, followed by quantitation of immunohistochemical staining.

A family of gram-negative, asporogenous rods or ovoid cells, aerobic or facultative anaerobic chemoorganotrophs. They are commonly isolated from SOIL, activated sludge, or marine environments.

A type of analysis in which subjects in a study group and a comparison group are made comparable with respect to extraneous factors by individually pairing study subjects with the comparison group subjects (e.g., age-matched controls).

A condition in which the ocular image of an object as seen by one eye differs in size and shape from that seen by the other.

A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.


Relevant Topics

DNA sequencing
Latest News Clinical Trials Research Drugs Reports Corporate
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...

Biotechnology - Biotech
Latest News Clinical Trials Research Drugs Reports Corporate
"using living things to create products or to do tasks for humans" About Biotechnology - Biotech Biotechnology is the practice of using plants, animals and micro-organisms such as bacteria, as well as biological processes - such as the ripen...

Biological Therapy
Latest News Clinical Trials Research Drugs Reports Corporate
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...


Searches Linking to this Article