Biomass Testing Articles
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The importance of monitoring PCDD/F in the stack-gas emissions from the combustion of certain types of solid biofuels
The increasing use of indigenous renewable energy sources (RES) for energy aims to meet the targets set up by the European Union (EU) regarding energy and climate change policies. Thus, biomass combustion has become more and more attractive. In 2012, biomass already represented 55% of the entire renewable share in the primary energy production in Portugal. Although the emissions from biomass ...
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Removal of Disperse Red 60 dye from aqueous solution using free and composite fungal biomass of Lentinus concinnus
Lentinus concinnus biomass was immobilized to carboxyl derivative of cellulose, carboxymethyl cellulose (CMC), in the presence of FeCl3 (0.1 mol L−1) via ionic cross-linking. The beads containing immobilized fungal biomass were incubated at 30 °C for three days to permit growth of the fungus. The free and immobilized fungal biomass were tested for adsorption of Disperse Red 60 (DR-60) ...
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Methods for increasing the rate of anammox attachment in a sidestream deammonification MBBR
Deammonification (partial nitritation-anammox) is a proven process for the treatment of high-nitrogen waste streams, but long startup time is a known drawback of this technology. In a deammonification moving bed biofilm reactor (MBBR), startup time could potentially be decreased by increasing the attachment rate of anammox bacteria (AMX) on virgin plastic media. Previous studies have shown ...
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Characterization of ecological risks from environmental releases of decamethylcyclopentasiloxane (D5)
Decamethylcyclopentasiloxane (D5) is used in personal care products and industrial applications. The authors summarize the risks to the environment from D5 based on multiple lines of evidence and conclude that it presents negligible risk. Laboratory and field studies show that D5 is not toxic to aquatic organisms or benthic invertebrates up to its solubility limit in water or porewater or its ...
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Study of the kinetics and the adsorption isotherm of cadmium(II) from aqueous solution using green algae (Ulva lactuca) biomass
Batch experiments were conducted to study the adsorption of hazardous cadmium onto low-cost algae biomass in aqueous solution with respect to concentration of adsorbate, adsorbent dosage, contact time, solution pH and temperature. Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and the isotherm constants were determined. The activation energy of ...
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Sludge reduction at low ozone doses: predictive effects and full-scale study
The activated sludge process is the most widely used wastewater treatment. The main drawback of this technology is the excess sludge production (ESP). The ozonation of sludge of the recirculation line is used to reduce the ESP. In this study, ozonation was applied on a fraction of sludge of the recirculation line in a full-scale plant (50,000 population equivalent) at a lower–specific ...
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Effects of pH on chromate(VI) adsorption by
Spirulina platensis biomass: batch tests and FT-IR studiesRaw and methylated biomass of Spirulina platensis was employed in chromate batch adsorption tests at pH range 1–7. The acid conditions seemed to favour the removal of chromium (Cr) with a yield of 87.0 and 97.6% by using raw and methylated biomass, respectively. However, the chromate and total chromium determination, carried out in the same sample, evidenced that a fraction of the ...
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Wastewater Monitoring Series, Part 1: Identifying the Gaps in Conventional Biomass Test Methods in Wastewater
Biological wastewater treatment systems require living biomass to remove biodegradable contaminants from wastewater. Effective treatment is directly dependent on the concentration of healthy biomass. It stands to reason that having an easy method to directly measure the quantity and quality of living biomass would be tremendously beneficial to the operation of biological wastewater treatment ...
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3 Companies That Are Making Money By Embracing Sustainability
Superstorm Sandy and the subsequent Nor’easter were the biggest news this week and last. The combination of two powerful forces resulted in unprecedented and widespread damage. Our thoughts are with those who have been impacted. I can’t help but draw the connection between our recent extreme weather and businesses today—corporations are increasingly recognizing that they, too, ...
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Modelling a full scale membrane bioreactor using Activated Sludge Model No.1: challenges and solutions
A full-scale membrane bioreactor (1,600 m3 d−1) was monitored for modelling purposes during the summer of 2006. A complete calibration of the ASM1 model is presented, in which the key points were the wastewater characterisation, the oxygen transfer and the biomass kinetics. Total BOD tests were not able to correctly estimate the biodegradable fraction of the wastewater. Therefore the wastewater ...
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The effect of the surface-to-volume contact ratio on the biomass production potential of the pipe products in contact with drinking water
The biomass production potential (BPP) test is a semi-static test for assessment of microbial growth promoting properties of construction products in contact with drinking water (CPDW). In 2003 the test was selected for incorporation into a scheme for acceptance of CPDW in the framework of implementation of the European Construction Product Directive and Drinking Water Directive. The pass/fail ...
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Biosorption of chlorophenols: a review
A review of published literature on the biosorption of chlorophenols using various biomasses is presented. Factors such as pH, time, temperature, ionic strength, type of biomass and type of chlorophenols influence the chlorophenol uptake by biomass. There is appreciable potential for biosorption of chlorophenols by most of the biomasses tested, although it is species dependent. The mechanisms of ...
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Anaerobic Biomass Activity Tests
Anaerobic Biomass Activity Tests The methane production activity of anaerobic sludges is related to the history of the sludge, the biomass yield from the wastewater the sludge has been treating, the fraction of methanogens, and the presence of toxic substances. Best performance can be achieved from an anaerobic treatment plant if the operator measures the Specific Methanogenic Production (SMP) ...
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