Search results for "PULP"

Discharge management in fresh and brackish water RAS: Combined phosphorus removal by organic flocculants and nitrogen removal in woodchip reactors

2020

The current study combined P and N removal using organic flocculant chemicals and woodchip bioreactors in both freshwater and brackish water (7 ppm) recirculating aquaculture systems (RAS). The use of carbon (C) containing flocculant chemicals in the process was hypothesized to further stimulate C-demanding N removal (denitrification) in bioreactors. The trial of combined P and N removal consisted of four treatments: freshwater and brackish water RAS with and without the addition of supernatant from flocculation process to the woodchip reactor. Duplicate woodchip reactors were used per treatment and the trial was run for six weeks. 56 % and 49 % of P was removed from fresh and brackish slud…

In vivo investigation on stem cells isolated from dental pulp and gingival tissues from periodontally compromised teeth

2015

French Fries, French Foxes and Crazy Frenchmen in Quentin Tarantino's Pulp Fiction (1994) and Roger Avary's Killing Zoe (1994) : Reading Hollywood “F…

2010

International audience; This article focuses on the representation of Frenchness in Quentin Tarantino's Pulp Fiction and Roger Avary's Killing Zoe, which were both released in 1994 and made by directors who regularly collaborated at the time. The treatment of Frenchness is different in both films, Pulp Fiction containing several anecdotal references and one French character, while Killing Zoe takes place in France with an almost exclusively European cast. The representation of Frenchness in these films will be my starting point to determine the readings possible for a spectator who is or is not familiar with French and French culture. “Frenchness,” which Pierre Verdaguer has shown is genera…

Effects of integrating a bioethanol production process to a kraft pulp mill

2010

Abstract The integration of an ethanol production process based on prehydrolysis of softwood chips to a kraft pulp mill is discussed. A simulation model of this biorefinery has been created with WinGEMS simulation software to calculate the mass and energy balances of the biorefinery and to examine the effects of the integration on the operation of the pulp mill. Integrating the prehydrolysis process to the modeled pulp mill producing 1000 Adt/day of pine pulp would increase the wood consumption by 16%. With the increased wood consumption, 40 t/day of ethanol could be produced, and the excess power production could be increased by 460 MWh/day. The integration of the ethanol production proces…

Value-added bioproducts or renewable energy derived from lignin? : comparative regional economic and environmental impact assessment : case Metsä Gro…

2016

Metsä Group’s next-generation bioproduct mill in Äänekoski will be operational within Q3/2017 and it will have significant regional economic impact on Central Finland. The mill will operate applying principles of circular economy, and thus utilize all possible side streams from pulp production. Lignin is one of the side streams that has huge potential to be refined, as sustainable products and by creating new value added. Conventionally, lignin is combusted with black liquor to generate energy in pulp mills. This thesis compares this conventional situation to refining lignin into biocomposite products made from 100% renewable resources with regard to regional economic and environmental impa…

Obtención de células madre de la pulpa dental : caracterización y adaptación a diversas condiciones de oxígeno

2013

Uno de los retos actuales de las cirugías odontológicas es la regeneración ósea, especialmente del hueso alveolar para la realización del implante dental. En los últimos años, las células madre mesenquimales derivadas la pulpa dental (CMPDs), se han convertido en un objetivo de estudio prometedor para la regeneración ósea gracias a su potencial de diferenciación a odontoblastos y osteoblastos así como sus propiedades inmunológicas. Sin embargo, su aplicación sigue siendo limitada por el gran número de células y el tiempo requerido para su obtención. Para ello, nos propusimos el objetivo de optimizar el tiempo de obtención de las CMPDs en la condición fisiológica de oxígeno (3-6% O2) así com…

Particle balance and return loops for microplastics in a tertiary-level wastewater treatment plant.

2021

Highlights: Dewatering by centrifugation was a step that removed a high number of MPs from the sludge. Sludge retained especially the fibrous microplactics. Reject water transported microplastics inside a wastewater treatment plant. Disc filter-based tertiary treatment ensured removal of 99% of microplastics in wastewater. Microplastics (MPs) from households, stormwater, and various industries are transported to wastewater treatment plants (WWTPs), where a high proportion of them are captured before discharging their residuals to watersheds. Although recent studies have indicated that the removed MPs are mainly retained in wastewater sludge, sludge treatment processes have gained less atten…