PMID: 11917999Mar 29, 2002Paper

Mathematical model for meso- and thermophilic anaerobic sewage sludge digestion

Environmental Science & Technology
Hansruedi SiegristWilli Gujer

Abstract

A mathematical model is developed to describe the dynamic behavior of mesophilic (35 +/- 5 degrees C) and thermophilic digestion (55 +/- 5 degrees C). Special emphasis is given to acetotrophic methanogenesis and propionate degradation, as the steps that determine the stability of anaerobic digestion, as well as to hydrolysis rate, which determines the degradation efficiency of particulate degradable organic carbon. Within the range of 6-20 (mesophilic) and 2-8 d (thermophilic) hydraulic retention time (HRT), the observed maximum growth rates for acetotrophic methanogens are 0.33 and 1.3 d(-1), respectively, with a 15% decay rate. Temperature and pH dependence as well as ammonia inhibition of acetate and propionate conversion are determined and included in the model, which allows us to simulate the effect of protein- and nitrogen-rich waste addition and the consequences of temporarily increased free ammonia at high pH. No inhibition of hydrogen conversion was observed in the same free ammonia range. The pH optimum is between 6.6 and 7.3. Acetotrophic methanogenesis is strongly inhibited below pH 6.2, whereas above pH 7.4 it can be inhibited by free ammonia. For digesters fed with ordinary municipal sewage sludge, free ammonia in...Continue Reading

Citations

Dec 5, 2009·Applied Microbiology and Biotechnology·Manfred LübkenMarc Wichern
Jun 2, 2012·Bioprocess and Biosystems Engineering·Andres Donoso-BravoAlain Vande Wouwer
Jul 30, 2005·Bioresource Technology·Wayne J Parker
Feb 5, 2005·Applied and Environmental Microbiology·Didem GüvenIngo Schmidt
Dec 12, 2013·Water Research·Keshab SharmaZhiguo Yuan
Dec 17, 2015·Environmental Technology·Hakan ÇelebiDelia Teresa Sponza
Dec 27, 2011·Bioresource Technology·Georgia AntonopoulouGerasimos Lyberatos
Sep 17, 2011·Water Research·Andres Donoso-BravoAlain Vande Wouwer
May 9, 2016·Journal of Environmental Sciences (China)·Baodan JinYongzhen Peng
Mar 5, 2016·Applied Microbiology and Biotechnology·Alejandro Gonzalez-MartinezJesus Gonzalez-Lopez
Feb 17, 2009·Bioresource Technology·Myung-Yeol LeeHang-Sik Shin
Dec 3, 2008·Bioresource Technology·Inmaculada M BuendíaLourdes Rodríguez
Jan 30, 2007·Water Research·J GomezJ L Garcia-Heras
Dec 10, 2009·Biotechnology and Bioengineering·Bing-Jie NiHan-Qing Yu
Aug 27, 2014·Journal of Environmental Management·Mahsa Madani-HosseiniSuzelle Barrington
Jul 8, 2015·Environmental Science and Pollution Research International·Joo-Youn NamHyun-Woo Kim
Oct 16, 2013·Bioresource Technology·Mirzaman ZamanzadehJosh D Neufeld

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.