scholarly journals Anaerobic Digestion of Screened Swine Waste with High Concentrations of Organic Matter and Suspended Solids Using an Upflow Anaerobic Filter Reactor

2006 ◽  
Vol 42 (2) ◽  
pp. 93-98 ◽  
Author(s):  
KAI LIU ◽  
YUEQIN TANG ◽  
YUTAKA FUJIMURA ◽  
TORU SHIGEMATSU ◽  
SHIGERU MORIMURA ◽  
...  
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Suspended Solids ◽  
Swine Waste ◽  
Anaerobic Filter ◽  
High Concentrations

A comparison of biofilm growth and water quality changes in sewers with anoxic and anaerobic (septic) conditions

1997 ◽  
Vol 36 (1) ◽  
pp. 303-310 ◽  
Author(s):  
Anette Æsøy ◽  
Målfrid Storfjell ◽  
Lovisa Mellgren ◽  
Herman Helness ◽  
Gøril Thorvaldsen ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Chemical Treatment ◽  
Suspended Solids ◽  
Pilot Scale ◽  
Water Velocity ◽  
Small Reduction ◽  
Biofilm Growth ◽  
Pre Treatment ◽  
High Concentrations

Changes in water quality in sewers may have significant effects on the performance of treatment plants. Experiments have been carried out in two pilot scale sewers for studies of biofilm growth and changes of water quality with anoxic (dosage of nitrate) and anaerobic (septic) conditions, respectively. The thickness of the biofilm in the anoxic sewer was 1-2 mm as compared to 0.3-0.6 mm in the septic sewer at a water velocity of 0.5 m/s. An increase in the water velocity from 0.002 m/s to 0.5 m/s gave thicker and denser biofilms. Sulphide formation was prevented in the anoxic sewer, and influent sulphide was efficiently removed. The denitrification rate in the anoxic sewer was 3.5-4.3 g NO3-N/m2d (15°C). This gave a considerable reduction in both organic matter and phosphorus and an increase in pH and alkalinity. The potential to remove organic matter in sewers may be exploited as a pre-treatment to mechanical and chemical treatment plants in order to meet more stringent effluent standards for organic matter discharge. Removal of readily biodegradable organic matter in the sewer may, however, be a disadvantage for treatment plants based on pre-denitrification. A reduced phosphate concentration may give a reduced metal coagulant dose at chemical treatment plants, whereas an increase in pH and alkalinity may give an increased dose. In the septic sewer, there was a small reduction in the organic matter, but no significant net change in total phosphorus, pH and alkalinity on average. The production rate of sulphide was in the range of 0.3-0.7 gS/m2d (15°C). On average there was no change in the concentration of suspended solids in either of the sewers. A sporadic large sloughing of biofilm was observed, particularly in situations with a very diluted wastewater. Sporadic high concentrations of suspended solids may cause separation problems at treatment plants.

Évaluation de la filtration sur tourbe et compost pour le traitement de l'effluent d'une usine de compostage de résidus verts

1996 ◽  
Vol 23 (5) ◽  
pp. 1041-1050 ◽  
Author(s):  
Claire Lafrance ◽  
Paul Lessard ◽  
Gerardo Buelna
Keyword(s):  
Organic Matter ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Water Systems ◽  
Organic Content ◽  
Organic Loading ◽  
Humic Material ◽  
Yard Waste ◽  
High Concentrations ◽  
Compost Leachate

Yard waste compost leachates may contain relatively high concentrations of organic matter and thus require treatment before being released into the environment. The leachate used in this study is characterized by variations in organic content, BOD5 (biochemical oxygen demand after a 5-day incubation period at 20 °C) varying from 100 to 5000 mg/L. Promising results were obtained in the laboratory using 20-L biofilters of peat and compost as filtering media for the treatment of this effluent. BOD5 reductions of 82% at an organic loading of 0.21 kg BOD5/m3∙d, and of more than 80% for SS (suspended solids) were obtained. Residual color in the effluent of the columns, leached from the humic material used as filtering medium, affected COD reduction, which reached 70% at best. Compost biofilters were as efficient as peat biofilters for reduction of SS and BOD5, and could be regarded as economical filtering media for treating leachate from composting sites. However, the effluents treated by these units did not meet Quebec standards for release into some surface water systems or storm sewers when the higher organic loads were used (0,21 and 0,42 kg BOD5/m3∙d). Key words: composting, yard waste, compost leachate, biofiltration, peat.

Sludge minimization by disintegration at different wastewater treatment plants

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Luchien Luning ◽  
Paul Roeleveld ◽  
Victor W.M. Claessen
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biological Degradation ◽  
Ongoing Research ◽  
Sludge Minimization

In recent years new technologies have been developed to improve the biological degradation of sewage sludge by anaerobic digestion. The paper describes the results of a demonstration of ultrasonic disintegration on the Dutch Wastewater Treatment Plant (WWTP) Land van Cuijk. The effect on the degradation of organic matter is presented, together with the effect on the dewatering characteristics. Recommendations are presented for establishing research conditions in which the effect of sludge disintegration can be determined in a more direct way that is less sensitive to changing conditions in the operation of the WWTP. These recommendations have been implemented in the ongoing research in the Netherlands supported by the National Institute for wastewater research (STOWA).

Study on the performance of an up-flow aerated biofilter (UAB) in municipal wastewater treatments

1994 ◽  
Vol 30 (11) ◽  
pp. 25-33 ◽  
Author(s):  
Yoshimasa Watanabe ◽  
Satoshi Okabe ◽  
Tomochika Arata ◽  
Yuji Haruta
Keyword(s):  
Organic Matter ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Unique Feature ◽  
Aeration Rate ◽  
Loading Rates ◽  
Hydraulic Loading ◽  
Running Cost ◽  
And Performance ◽  
Activated Sludge Systems

A comprehensive wastewater treatment system that accomplishes oxidation of organic matter, nitrification, and denitrification was developed, and its characteristics and performance were investigated. A municipal wastewater was treated by an up-flow aerated biofilter (UAB), in which biofilms were developed on stainless meshes installed horizontally. This UAB exhibited a great potential ability of oxidation of organic matter, SS stabilization, and nitrification due to a unique aeration mechanism giving high DO concentrations with relatively low aeration rates. Another unique feature of the UAB was that attached biofilms on stainless meshes physically filtered out and/or adsorbed suspended solids in the wastewater in addition to the biological oxidation of organic matter. A stable nitrification could be achieved at HRT=10 hours corresponding to a hydraulic loading of 86 L m−2 d−1 and at a ratio of aeration rate to wastewater flow rate (A/W) of 2, which is considerably low as compared to aeration rates of typical activated sludge systems. This UAB system also could handle relatively high hydraulic loading rates. The UAB used in this study still have enough space to install more stainless meshes so as to reduce hydraulic loading rates resulting in the reduction of HRT and aeration rate, which leads to improvement of the system performance as well as reduction of the running cost.

scholarly journals A Framework Based on Finite Element Method (FEM) for Modelling and Assessing the Affection of the Local Thermal Weather Factors on the Performance of Anaerobic Lagoons for the Natural Treatment of Swine Wastewater

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 882
Author(s):  
Saulo Brito-Espino ◽  
Alejandro Ramos-Martín ◽  
Sebastian O. Pérez-Báez ◽  
Carlos Mendieta-Pino ◽  
Federico Leon-Zerpa
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Organic Matter ◽  
Anaerobic Digestion ◽  
Environmental Sustainability ◽  
Diffusion Reaction ◽  
Swine Wastewater ◽  
Natural Treatment ◽  
Element Method ◽  
Anaerobic Lagoons

Anaerobic lagoons are natural wastewater treatment systems suitable for swine farms in small communities due to its low operational and building costs, as well as for the environmental sustainability that these technologies enable. The local weather is one of the factors which greatly influences the efficiency of the organic matter degradation within anaerobic lagoons, since microbial growth is closely related to temperature. In this manuscript, we propose a mathematical model which involves the two-dimensional Stokes, advection–diffusion-reaction and heat transfer equations for an unstirred fluid flow. Furthermore, the Anaerobic Digestion Model No1 (ADM1), developed by the International Water Association (IWA), has been implemented in the model. The partial differential equations resulting from the model, which involve a large number of state variables that change according to the position and the time, are solved through the use of the Finite Element Method. The results of the simulations indicated that the methodology is capable of predicting reasonably well the steady-state of the concentrations for all processes that take place in the anaerobic digestion and for each one of the variables considered; cells, organic matter, nutrients, etc. In view of the results, it can be concluded that the model has significant potential for the design and the study of anaerobic cells’ behaviour within free flow systems.

Effect of Anaerobic Digestion on Manure Characteristics for Phosphorus Precipitation from Swine Waste

2009 ◽  
Vol 25 (1) ◽  
pp. 97-102 ◽  
Author(s):  
L. B. Moody ◽  
R. T. Burns ◽  
K. J. Stalder
Keyword(s):  
Anaerobic Digestion ◽  
Swine Waste

Analysis of microbial diversity and optimal conditions for enhanced biogas production from swine waste anaerobic digestion

2013 ◽  
Vol 5 (5) ◽  
pp. 053143 ◽  
Author(s):  
Ying-Chien Chung ◽  
Yu-Cheng Chang ◽  
Yu-Pei Chen ◽  
Wei-Chih Lin ◽  
Hsiao-Hsien Lin ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Microbial Diversity ◽  
Biogas Production ◽  
Optimal Conditions ◽  
Swine Waste

Abundances of Tetracycline Resistance Genes and Tetracycline Antibiotics during Anaerobic Digestion of Swine Waste

2019 ◽  
Vol 48 (1) ◽  
pp. 171-178 ◽  
Author(s):  
Melanie Couch ◽  
Getahun E. Agga ◽  
John Kasumba ◽  
Rohan R. Parekh ◽  
John H. Loughrin ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Resistance Genes ◽  
Tetracycline Resistance ◽  
Swine Waste ◽  
Tetracycline Antibiotics ◽  
Tetracycline Resistance Genes

Characterization, Digestibility and Anaerobic Treatment of Leachates from Old and Young Landfills

1989 ◽  
Vol 21 (4-5) ◽  
pp. 145-155 ◽  
Author(s):  
R. Méndez ◽  
J. M. Lema ◽  
R. Blázquez ◽  
M. Pan ◽  
C. Forjan
Keyword(s):  
Anaerobic Digestion ◽  
Anaerobic Treatment ◽  
Full Scale ◽  
Operating Conditions ◽  
Organic Load ◽  
Anaerobic Filter ◽  
Standards Of Living ◽  
Landfill Sites

We have evaluated the utility of applying anaerobic digestion treatment to the leachates from two landfill sites receiving solid urban refuse from populations of similar standards of living. Both tips are located in the same area and have very similar climates, but they differ as regards the length of time they have been operated. The leachates from the older tip have much lower levels of organic load, 40% of which was refractory to the anaerobic digestion treatment applied. The digestibility of leachates was studied by using a semicontinuous suspended sludge system.It was possible to remove up to 65% of the soluble COD of leachates from the young tip by means of an anaerobic filter working at HRTs less than 2 days. This system proved to be highly stable when its operating conditions were subjected to perturbations similar to those likely to be suffered by a full-scale plant.

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