Topics

Rapid aerobic sludge granulation in an integrated oxidation ditch with two-zone clarifiers.

08:00 EDT 10th March 2020 | BioPortfolio

Summary of "Rapid aerobic sludge granulation in an integrated oxidation ditch with two-zone clarifiers."

Aerobic granular sludge (AGS) was rapidly cultivated in an integrated oxidation ditch with two-zone clarifiers by using a novel external sludge treatment and return mode to treat low concentrations of actual domestic sewage. The selective pressure created by the two-zone clarifiers can retain the well-settling granules and discharge light flocs with poor settleability. The granules stayed in the reactor, which induced bacterial attachment to the granules that acted as nuclei, while the discharged flocs can stimulate microorganisms to secrete large amounts of extracellular polymeric substances (EPS) under the external conditioning of CaCl and natural air drying. Then, this surplus sludge was returned to the reactor to create more small granules that combined with each other through the action of hydraulic shear forces to achieve rapid granulation. The results showed that AGS was formed successfully in the reactor on day 18, and after 51 days of continuous operation, the biomass concentration and settling ability were further improved (the mixed liquor suspended solids (MLSS) and sludge volume index at 5 min (SVI) were stable at approximately 3500 mg/L and 40.0 mL/g, respectively). During the whole experimental period, the biological sludge activity was greatly improved, and the EPS and microbial community changed significantly, including an enrichment of microbes with EPS secretion and granule stabilization functions. The study results reveal that the pollutant removal efficiency improved after granulation. Furthermore, this approach required less energy and is eco-friendly for potential full-scale implementation.

Affiliation

Journal Details

This article was published in the following journal.

Name: Water research
ISSN: 1879-2448
Pages: 115704

Links

DeepDyve research library

PubMed Articles [9471 Associated PubMed Articles listed on BioPortfolio]

Development of a dynamic feeding strategy for continuous-flow aerobic granulation and nitrogen removal in a modified airlift loop reactor for municipal wastewater treatment.

This study investigated the aerobic sludge granulation and nitrogen removal performance in a modified airlift loop reactor treating municipal wastewater under different operation conditions. Dynamic f...

Metagenomics revealed the phase-related characteristics during rapid development of halotolerant aerobic granular sludge.

Efforts to produce aerobic granular sludge (AGS) for high-efficient and stable nutrient removal in high saline wastewaters have gained much attention recently. This study was undertaken to describe th...

Formation of partial-denitrification (PD) granular sludge from low-strength nitrate wastewater: The influence of loading rates.

Granular sludge has been believed to be a promising technology in wastewater biological treatment. However, the formation of granules at low substrate concentration is a difficult task that has seldom...

Modeling cell aggregate morphology during aerobic granulation in activated sludge processes reveals the combined effect of substrate and shear.

Past research on AGS (aerobic granular sludge technology) has mainly focused on macro-environment factors, such as settling time, feeding pattern, OLR (organic loading rate), SRT (sludge retention tim...

Tolerance to short-term saline shocks by aerobic granular sludge.

In industrial wastewaters, rapid shifts of salinity leading to transient shocks caused damages on biological treatments. Aerobic granular sludge is a promising technology that showed its greater resis...

Clinical Trials [3800 Associated Clinical Trials listed on BioPortfolio]

Exercise Training and Fitness in Severe Obesity

Obesity is commonly associated with insulin resistance and hyperinsulinemia, which seem to be linked with an impaired ability to oxidize lipids, particularly in class III obese individuals...

High Altitude and Exogenous Carbohydrate Oxidation

Recent studies have reported that oxidation of exogenous carbohydrate is reduced under acute hypobaric hypoxic (high altitude; HA) conditions compared to normoxia (sea level; SL) in native...

Granulation Tissue Treatment: Silver Nitrate vs Kenalog vs Washcloth Abrasion

Granulation tissue, or excess tissue, forms around gastrostomy tube sites and is a common problem seen in the pediatric surgery population. There is no standard treatment that has been ide...

Study of Protein Translocation in Patients With Beta-Oxidation Disorders

OBJECTIVES: I. Characterize inheritance patterns of mutations in patients with beta-oxidation disorders.

Oxidation Rates of the Different Substrates During Exercise in Children and Adolescents With Juvenile Idiopathic Arthritis. Case-control Study and Cases Treated / Cases Not Treated With Anti-TNFα

During exercise, energy comes mainly from carbohydrates and lipids. The relative contribution of lipids and glucose as energy substrates to exercise depends on the parameters of the exerci...

Medical and Biotech [MESH] Definitions

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 concept, developed in 1983 under the aegis of and supported by the National Library of Medicine under the name of Integrated Academic Information Management Systems, to provide professionals in academic health sciences centers and health sciences institutions with convenient access to an integrated and comprehensive network of knowledge. It addresses a wide cross-section of users from administrators and faculty to students and clinicians and has applications to planning, clinical and managerial decision-making, teaching, and research. It provides access to various types of clinical, management, educational, etc., databases, as well as to research and bibliographic databases. In August 1992 the name was changed from Integrated Academic Information Management Systems to Integrated Advanced Information Management Systems to reflect use beyond the academic milieu.

A health care system which combines physicians, hospitals, and other medical services with a health plan to provide the complete spectrum of medical care for its customers. In a fully integrated system, the three key elements - physicians, hospital, and health plan membership - are in balance in terms of matching medical resources with the needs of purchasers and patients. (Coddington et al., Integrated Health Care: Reorganizing the Physician, Hospital and Health Plan Relationship, 1994, p7)

An order of CRENARCHAEOTA consisting of aerobic or facultatively aerobic, chemolithotrophic cocci which are extreme thermoacidophiles. They lack peptidoglycan in their cell walls.

A genus of gram positive, acetogenic, thermophilic bacteria in the family Thermoanaerobacteraceae. Known habitats include HOT SPRINGS, horse manure, emu droppings, and sewage SLUDGE.

Quick Search


DeepDyve research library

Relevant Topic

Biological Therapy
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