Response of VFAs and microbial interspecific interaction to primary sludge fermentation temperature

Abstract The importance of phosphorus as a nutrient in the eutrophication of lakes and rivers has been well established (Fruh 1967). It has been shown in addition that a significant amount of this phosphorus arises from the discharge of treated and untreated municipal wastewater (Task Group Report 1967). Consequently, measures are being taken, notably in the Province of Ontario, for removal of phosphorus from wastewater by means of chemical precipitation. Chemicals exhibiting satisfactory phosphorus removal include lime, iron compounds and aluminum compounds (Leckie and Stumm 1970; Schmid 1968; Wuhrman 1968).

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Reuse of Sludge from Pulp and Paper Industry Pilot and Full Scale Applications

Water Science & Technology ◽

10.2166/wst.1993.0069 ◽

1993 ◽

Vol 28 (2) ◽

pp. 17-26 ◽

Cited By ~ 6

Author(s):

V. Eroǧlu ◽

A. M. Saatçi

Keyword(s):

Economic Analysis ◽

Paper Industry ◽

Pulp And Paper Industry ◽

Pulp And Paper ◽

Full Scale ◽

Primary Sludge ◽

Recent Advances ◽

Made In

Recent advances made in the reuse of pulp and paper industry sludges in hardboard production are explained. Data obtained from pilot and full-scale plants using primary sludge of a pulp and paper industry as an additive in the production of hardboard is presented. An economic analysis of the reuse of pulp and paper primary sludge in hardboard manufacturing is given. The quality of the hardboard produced is tested and compared with the qualities of the hardboard produced by the same plant before the addition of primary sludge. The hardboard with primary sludge additive has been used in Turkey for about a year in the manufacturing of office and home furniture. The results are very satisfactory when the primary sludge is used at 1/4 ratio.

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Biosludge Incineration in a Recovery Boiler

Water Science & Technology ◽

10.2166/wst.1999.0712 ◽

1999 ◽

Vol 40 (11-12) ◽

pp. 195-200 ◽

Cited By ~ 6

Author(s):

P. Harila ◽

V.-A. Kivilinna

Keyword(s):

Black Liquor ◽

Pulp Mill ◽

Effluent Treatment ◽

Attractive Alternative ◽

Net Energy ◽

High Moisture ◽

Primary Sludge ◽

Start Up ◽

Combustion Emissions ◽

Recovery Boiler

An activated sludge process is an effective tool against effluent emissions in a pulp mill. It has only a few features which can be regarded deficiences. One of them is that effluent treatment of a modern pulp mill creates some 10-20 tonnes dry solids of biosludge per day. This sludge is difficult to burn due to its high moisture content. The most common way is to mix biosludge with primary sludge, to dewater the mixture in presses and finally to burn it in a solid fuel boiler. This type of sludge treatment incurs rather high costs and does not produce any net energy. Also combustion emissions vary depending on the boiler type. The Metsä-Botnia Kemi Pulp Mill was the first mill in the world to burn biosludge in a recovery boiler. The system start-up was in 1993 and it has been in operation ever since. Mechanically dewatered biosludge is mixed with weak black liquor and concentrated in a conventional evaporation plant equipped with a pressurized superconcentrator unit. In a modern recovery boiler, firing conditions are well controlled and monitored. Better emission control than in most bark fired boilers is achieved. Accumulation of nonprocess elements, corrosion, plugging, scaling and some other operational problems were expected. A lot of experience has been gathered during the years of operation and reviewed in this presentation. The achieved benefits of the system are discussed. Disposal of biosludge in a recovery boiler offers an economically and environmentally attractive alternative. Probably the best evidence from this is the fact that Metsä-Botnia has applied the same process solution in the recent reconstruction of the recovery departments at the Jouteno Mill.

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Fermentation temperature affects yogurt quality: A metabolomics study

Food Bioscience ◽

10.1016/j.fbio.2021.101104 ◽

2021 ◽

pp. 101104

Author(s):

Shanshan Yang ◽

Danli Yan ◽

Yiting Zou ◽

Delun Mu ◽

Xinfei Li ◽

...

Keyword(s):

Fermentation Temperature ◽

Metabolomics Study

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FODMAP Fingerprinting of Bakery Products and Sourdoughs: Quantitative Assessment and Content Reduction through Fermentation

Foods ◽

10.3390/foods10040894 ◽

2021 ◽

Vol 10 (4) ◽

pp. 894

Author(s):

Johannes Pitsch ◽

Georg Sandner ◽

Jakob Huemer ◽

Maximilian Huemer ◽

Stefan Huemer ◽

...

Keyword(s):

Irritable Bowel Syndrome ◽

Acetic Acid ◽

Lactic Acid ◽

Low Temperature ◽

Quantitative Assessment ◽

Bakery Products ◽

Fermentation Products ◽

Fermentation Temperature ◽

Digestive Disorders ◽

Irritable Bowel

Fermentable oligo-, di-, and monosaccharides and polyols (FODMAPs) are associated with digestive disorders and with diseases such as irritable bowel syndrome. In this study, we determined the FODMAP contents of bread, bakery products, and flour and assessed the effectiveness of sourdough fermentation for FODMAP reduction. The fermentation products were analyzed to determine the DP 2–7 and DP >7 fructooligosaccharide (FOS) content of rye and wheat sourdoughs. FOSs were reduced by Acetobacter cerevisiae, Acetobacter okinawensis, Fructilactobacillus sanfranciscensis, and Leuconostoc citreum to levels below those in rye (−81%; −97%) and wheat (−90%; −76%) flours. The fermentation temperature influenced the sourdough acetic acid to lactic acid ratios (4:1 at 4 °C; 1:1 at 10 °C). The rye sourdough contained high levels of beneficial arabinose (28.92 g/kg) and mannitol (20.82 g/kg). Our study contributes in-depth knowledge of low-temperature sourdough fermentation in terms of effective FODMAP reduction and concurrent production of desirable fermentation byproducts.

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