Navigation Links
New methods for better purification of wastewater
Date:3/5/2012

Before wastewater reaches recipient waters, nutrients must be removed in order to avoid eutrophication and large algal blooms, which may result in serious damage to animal and plant life. Robert Almstrand at the University of Gothenburg, Sweden, has shown in his thesis that better removal of nitrogen from wastewater can be achieved by providing the bacteria that purify the water with alternating high and low levels of nutrients.

The emission of wastewater to oceans, lakes and rivers contributes nutrients in the form of nitrogen and phosphorus to these recipients. This causes large algal blooms, and to prevent this the wastewater must be purified in wastewater treatment plants before being released.

The removal of nitrogen is a biological process in which different groups of bacteria are used to convert the nitrogen compounds to nitrogen gas in a number of steps. The nitrogen gas is then emitted to the atmosphere. The first, and rate-limiting step is nitrification. Nitrification is carried out by bacteria that oxidize ammonia via nitrite to nitrate ions.

Robert Almstrand at the Department of Chemistry and Molecular Biology shows in his thesis that the ability of the bacteria to carry out nitrification is improved if the bacteria receive alternating high and low levels of substrate (in the form of dissolved ammonium), rather than a constant low level. This will enable the wastewater treatment plant to cope better with variations in the concentration of nitrogen in the wastewater.

"Since the composition of the wastewater varies continuously, it was important to carry out the studies in a set-up that was as similar as possible to real wastewater treatment plants. For this reason we constructed a pilot plant at Ryaverket in Gothenburg", says Robert Almstrand.

The bacteria grew in what are known as "biofilms", which are dense collections of microorganisms on surfaces. Robert Almstrand used microscopy and digital image analysi
'/>"/>

Contact: Robert Almstrand
robert.almstrand@cmb.gu.se
46-317-862-569
University of Gothenburg
Source:Eurekalert

Page: 1 2

Related biology news :

1. New lab manual focuses on essential methods for purifying and characterizing proteins
2. Deep biosphere research points to new methods for recovering petroleum
3. Cold Spring Harbor Protocols features organ and cell culture methods
4. New manual presents robust, state-of-the-art proteomics methods for teaching and research
5. Methods for studying DNA repair and protein modification are featured in CSH Protocols
6. Cold Spring Harbor Protocols features stem cell differentiation, plant RNAi methods
7. Protein function and chromatin structure methods featured in Cold Spring Harbor Protocols
8. Protein analysis methods, viral vectors featured in Cold Spring Harbor Protocols
9. Scholar unconvinced new lie-detection methods better than old ones
10. K-State host to workshop on rapid methods to detect microorganisms in food
11. Infant formula adulteration with melamine underscores need for better detection methods
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/8/2015)... , April 8, 2015  Infinisource, a ... and services, and Morpho, a leading supplier of ... to produce the market,s most advanced biometrically-enabled time ... iSolved NXG time clock is setting a bold, ... labor data for the small and mid-size employer. ...
(Date:4/2/2015)... April 2, 2015 In ... by far outperforms the strongest competitors, showing outstanding ... accuracy, the system is capable of a throughput ... proves up to be ten times faster than ... runner-up performance.      (Photo: http://photos.prnewswire.com/prnh/20150402/738673-a ...
(Date:4/2/2015)... According to preliminary estimates Fingerprint ... higher than 125 MSEK. This exceeds the guidance provided ... revenues for Q1 2015 would be in line with ... 2014. The operating result for the first quarter is ... report will as previously communicated be published on May ...
Breaking Biology News(10 mins):iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3Fingerprint Cards Revises Revenues for Q1 2015 2
... enhanced the abilities of the molecules they are creating ... molecular complexes enter cancer cells and, when signaled, deliver ... new supermolecules have more units that will absorb light ... frequencies that can be included and excluded as signals ...
... DNA isn't just for storing genetic codes any more. ... into larger structures -- scientists have been using it ... even working mechanical devices. , Now Cornell University researchers ... could be used for drug delivery and as containers ...
... have become invaluable decision-making tools for public health ... epidemic of 2001, models can be useful in ... of an infection and they can allow the ... models make implicit assumptions that may systematically bias ...
Cached Biology News:Virginia Tech group adds tools to DNA-targeted anti-cancer drugs 2Virginia Tech group adds tools to DNA-targeted anti-cancer drugs 3Self-assembled DNA buckyballs for drug delivery 2Self-assembled DNA buckyballs for drug delivery 3Understanding biases in epidemic models important when making public health predictions 2
(Date:4/24/2015)... /PRNewswire/ - BioAmber Inc. (NYSE: BIOA ) has ... of bio-succinic acid used to produce a new ... that Bayer MaterialScience has begun commercializing.    ... eco, a series of bio-based waterborne polyurethane dispersions ... 65%.  IMPRANIL ® eco has been developed ...
(Date:4/24/2015)... April 24 , 2015 PAREXEL International ... services provider, today announced that Partnerships in Clinical Trials ... Management, the 2015 Clinical Innovator of the Year.  The ... team for the Company,s Perceptive MyTrials ® Data-Driven ... Thursday night during the 2015 Partnership Awards in ...
(Date:4/23/2015)... Dora, Florida (PRWEB) April 23, 2015 ... that it intends to conduct a groundbreaking pilot ... begin to be reversed in as little as ... the science of metabolic and nutritional medicine—will aggressively ... that cripple and destroy our aging brain. These ...
(Date:4/23/2015)... 2015  Neurocrine Biosciences, Inc. (Nasdaq: NBIX ) ... quarter 2015 results before the Nasdaq market opens on ... conference call and webcast to discuss its financial results ... 2015 at 8:00 a.m. Eastern Time (5:00 a.m. Pacific ... call by dialing 866-952-1906 (US) or 785-424-1825 (International) using ...
Breaking Biology Technology:Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 2Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 3Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 3PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 5New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3Neurocrine Biosciences Announces Conference Call and Webcast to Report First Quarter 2015 Results 2
... NeoStem, Inc.,(NYSE Alternext US: NBS), which is pioneering the pre-disease ... medical need,today announced that it has completed an above market ... $1.25 per unit with each unit,consisting of one share of ... stock at $1.75 per share. , ...
... SAN FRANCISCO, Calif., Dec. 3 Portola,Pharmaceuticals, a ... in cardiovascular disease, inflammatory disease,and cancer, today announced ... novel,compounds that inhibit spleen tyrosine kinase (Syk) and ... presented at the annual meeting of the,American Society ...
... , , QUEBEC CITY, ... AEZS ; TSX: AEZ), a global biopharmaceutical company ... has completed the transaction under the previously announced purchase ... ("CHRP") relating to AEterna Zentaris, rights to royalties on ...
Cached Biology Technology:NeoStem Completes $500,000 Private Placement With Strategic Investor 2NeoStem Completes $500,000 Private Placement With Strategic Investor 3Portola Data on Its Novel Syk Inhibitors and Novel Universal Factor Xa Inhibitor Antidote to be Presented at 2008 American Society of Hematology (ASH) Meeting 2Portola Data on Its Novel Syk Inhibitors and Novel Universal Factor Xa Inhibitor Antidote to be Presented at 2008 American Society of Hematology (ASH) Meeting 3AEterna Zentaris Closes Sale of Cetrotide(R) Royalty Stream for $52.5 Million to Cowen Healthcare Royalty Partners 2AEterna Zentaris Closes Sale of Cetrotide(R) Royalty Stream for $52.5 Million to Cowen Healthcare Royalty Partners 3
...
Contains 100 positive controls for effective screening of HDAC inhibitors by fluorometric method....
Homo sapiens jumping translocation breakpoint...
RABBIT ANTI HUMAN TRRAP (CT) Immunogen: Recombinant C-terminal kinase-related domain of human TRRAP....
Biology Products: