Biochemical Methane Potential Articles on Environmental XPRT

Influence of conditioning agents and enzymic hydrolysis on the biochemical methane potential of sewage sludge

Biochemical methane potential (BMP) tests have been carried out on sewage sludge from two wastewater treatment plants to assess the effect of additives (FeCl3 and two cationic polyelectrolytes) used in sludge dewatering. BMP tests were also carried out on the concentrated solid phase from the enzymic hydrolysis pre-treatment (42 °C, 48 h). FeCl3 had no significant effect on ...

Oct. 18, 2013

By IWA Publishing

Assessing the role of biochemical methane potential tests in determining anaerobic degradability rate and extent

The biodegradability and bioavailability of hydrolysis-limited substrates under anaerobic (and aerobic) conditions can be represented by two key parameters – degradability (fd), or the percentage that can be effectively be destroyed during digestion, and first order hydrolysis coefficient (khyd), or the speed at which material breaks down. Biochemical methane potential (BMP) ...

Jan. 1, 2011

By IWA Publishing

Ozone pretreatment of olive mill wastewaters (OMW) and its effect on OMW biochemical methane potential (BMP)

The possibility of coupling a physicochemical pretreatment (ozonation) with a biological treatment (anaerobic digestion) was investigated for the case of olive mill wastewaters (OMW). Batch ozonation experiments were performed in a glass bubble reactor. The parameters which were tested included the ozone concentration in the inlet gas stream, the reactor temperature and the composition of the ...

Dec. 19, 2013

By IWA Publishing

Methane production and hydrolysis kinetics in the anaerobic degradation of wastewater screenings

Anaerobic biodegradability and hydrolysis rates of wastewater screenings were determined using the biochemical methane potential test at 37 °C. The extent and rate of screenings conversion to methane of this complex and particulate substrate were investigated and since two stages of hydrolysis were identified, corresponding to the different types of materials in screenings, a linear and ...

Jul. 19, 2013

By IWA Publishing

Determination of methane yield of cellulose using different experimental setups

In this work, biochemical methane potential (BMP) tests with cellulose as a model substrate were performed with the aid of three manually operated or conventional experimental setups (based on manometer, water column and gas bag) and one automated apparatus specially designed for analysis of BMP. The methane yields were 340 ± 18, 354 ± 13, 345 ± 15 and 366 ± 5 ml ...

Aug. 13, 2014

By IWA Publishing

Anaerobic treatability and biogas production potential of selected in-mill streams

Biochemical methane potential assays (BMP assays) were performed to study the potential of anaerobic treatment of in-mill wastewaters. The assay results indicated that condensate and the BCTMP effluent, which are currently treated with the anaerobic internal circulation reactors, were the best streams for anaerobic treatment because of their relatively high degradability (>80%) and initial rates ...

Nov. 1, 2010

By IWA Publishing

Evaluation of treatment potential, biogas generation and sludge properties of an anaerobic claridigester

The anaerobic process for the treatment of municipal and industrial wastewater has been in practice for over a century. Apart from treatment of wastewater, the process has the advantage of lower sludge and biogas production that can save energy. Application of this process in a primary clarifier in such a way that there is simultaneous digestion of primary settled sludge and organic removal ...

Feb. 6, 2016

By IWA Publishing

Solid thickening and methane production of livestock wastewater using dissolved carbon dioxide flotation

Dilute manure is classified as wastewater due to the large quantity of water used in livestock production in Korea. Livestock wastewater treatment is required in order to reduce high moisture content and treat fluids discharged from the digestion process. In livestock wastewater treatment plants, large quantities of CO2 gas are produced at combined heat and power facilities as well as in the ...

Nov. 4, 2015

By IWA Publishing

Improved methane production from waste activated sludge with low organic content by alkaline pretreatment at pH 10

Sludge with low organic content always results in an unsatisfactory performance, even failure of anaerobic digestion. The alkaline pretreatment effect on anaerobic digestion of sludge with low organic content has seldom been studied although it gives many benefits for sludge with high organic content. In this study the influence of alkaline pretreatment (pH 10, an effective alkaline pH) on the ...

Oct. 18, 2013

By IWA Publishing

Efficiency analysis of hydrogen production methods from biomass

Hydrogen is considered as a universal energy carrier for the future, and biomass has the potential to become a sustainable source of hydrogen. This article presents an efficiency analysis of hydrogen production processes from a variety of biomass feedstocks by a thermochemical method – gasification as well as biochemical methods – fermentation and anaerobic digestion. The exergetic ...

Jul. 22, 2008

By Inderscience Publishers

Grease waste and sewage sludge co-digestion enhancement by thermal hydrolysis: batch and fed-batch assays

Grease waste (GW) is an adequate substrate for sewage sludge co-digestion since, coming from a waste water treatment plant, it has a high methane potential (489 NmLCH4/gVSin); however, no synergistic effect takes place when co-digesting with 52%VS grease. Conversely, thermal hydrolysis (TH) improves the anaerobic digestion of GW (43% higher kinetics) and biological sludge ...

May 7, 2014

By IWA Publishing

Modelling start-up performance of anaerobic digestion of saline-rich macro-algae

Some of the key factors affecting the adaptation of anaerobic digestion processes to increasing levels of salinity were determined in batch tests using brown seaweed as a feedstock. It was found that cultures seeded with non-saline anaerobic inoculum required an adaptation period of up to two months to reach the same level of methane production rate as in those cultures seeded with ...

May 20, 2014

By IWA Publishing

Dual role of hydrolysis coefficient in modelling of bioreactors

To the authors' knowledge, there is no published work, relating biodegradation and settlement of municipal solid waste (MSW) in bioreactor landfills together. The present mathematical model is developed to simulate the biodegradation of MSW in anaerobic bioreactor landfills and predict the strength of leachate in terms of volatile fatty acid (VFA). The hydrolysis rate constant (k ...

Jan. 10, 2011

By Inderscience Publishers

Anaerobic BMP and ATA Tests

Anaerobic BMP and ATA Tests Biochemical Methane Potential (BMP) tests involve addition of test chemicals or wastewater samples of concern to an anaerobic culture that is contained within a sealed vessel. Methane or total gas production are measured over periods ranging from 1 to 60 days without addition of new chemical or wastewater sample. Modern BMP tests usually involve multiple additions of ...

Jan. 1, 2003

By Challenge Technology

Effect of leachate recirculation on refuse decomposition rates at landfill site: a case study

In this study, a comparison of methane (CH4) generation rates for two test cells, one operated with (enhanced) and another without leachate recirculation at Odayeri Sanitary Landfill were compared using their bio-chemical methane potentials (BMP). Initial methane potential is approximately 34.5 m³ CH4/wet ton of solid waste. The remaining methane potential for the ...

May 11, 2004

By Inderscience Publishers

Evaluation of thermal steam-explosion key operation factors to optimize biogas production from biological sludge

Thermal steam-explosion is the most extended hydrolysis pretreatment to enhance anaerobic digestion of sludge. Thermal hydrolysis key parameters are temperature (T) and time (t), and the generally accepted values reported from full-scale information are: 150–230 °C and 20–60 min. This study assesses the influence of different temperature–time–flash combinations (110–180 °C, ...

Jun. 9, 2015

By IWA Publishing

Low temperature microwave and conventional heating pre-treatments to improve sludge anaerobic biodegradability

This paper presents the results of lab-scale experiments on low temperature thermal pre-treatment (less than 100 °C) prior to anaerobic digestion of sewage sludge. Two heating ways, microwave heating (MH) and conventional heating (CH), and two types of sludge, primary and waste activated sludge, were compared under the same experimental conditions. The degree of solubilisation produced by ...

Feb. 19, 2014

By IWA Publishing

Anaerobic digestion of sunflower oil cake: a current overview

Due to the chemical and physical structure of a lignocellulosic biomass, its anaerobic digestion (AD) is a slow and difficult process. In this paper, the results obtained from a batch biochemical methane potential (BMP) test and fed-batch mesophilic AD assays of sunflower oil cake (SuOC) are presented. Taking into account the low digestibility shown during one-stage experiments the methane yield ...

Nov. 20, 2012

By IWA Publishing

Pre-treatment of thickened waste activated sludge (TWAS) for enhanced biogas production via the application of a novel radial horn sonication technology

The efficacy of sonication as a pre-treatment to anaerobic digestion (AD) was assessed using thickened waste activated sludge (TWAS). Efficiency was measured in relation to solubilisation, dewaterability, and AD performance. Eighteen experimental conditions were evaluated at low frequency (20 kHz), duration (2–10 s), amplitude (∼8–12 μm) and applied pressure (0.5–3.0 barg), using a sonix™ ...

Feb. 22, 2017

By IWA Publishing

Feasibility of high solid anaerobic digestion: option for treatment of distillers grains from cassava ethanol production

This research article mainly focused on the feasibility and management of distillers grains produced from ethanol industries using high solid anaerobic digestion systems. A significant barrier for distillers grains in the anaerobic process are its low pH (3.80–4.16) and high C/N ratio (37/1–42/1). According to distillers grains characteristics, the stillage investigated was in dry form (TS 23% to ...

May 29, 2014

By Inderscience Publishers

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