What is biomass in activated sludge process?
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74 Citations | The model defined here is a contribution to a further development of mechanistically based models for activated sludge processes. |
62 Citations | Perhaps the central constituent of soil that is important in the context of sewage sludge amendment is microbial biomass. |
| This system keeps the advantages of complete mixing of substrates and microorganisms and flexible operation of the activated sludge process, and increased biological phase, less sludge, process stability and good settleability of sludge of the contact aeration process. | |
87 Citations | This paper demonstrates that the above mentioned features reflect both the hydraulic and organic loading, reaction rates, and degree of completion of the reactions in the activated sludge process. |
| Activated sludge, as an aerobic environment rich in organic matter, often provides the optimum conditions for the development of colourless filaments. | |
34 Citations | Considering activated sludge biomass is abundantly available around the world, this work suggests that industrial scale PHA production could be achieved more generally in conjunction with sludge management rather than using purpose specific biorefineries where biomass is grown on high value feedstocks. |
70 Citations | The estimated kinetic constants were higher in all sludge types tested for the biomass stabilization process, indicating that volatile solids destruction and biomass stabilization are not parallel processes, since the latter one is reached before the former. |
| Our experimental data support the hypothesis that the occurrence and/or the type of bulking in activated sludge could be affected by the combination of kinetic selection, microbial storage, as well as the EPS composition. | |
30 Citations | These results show that this method is suitable for studying and optimizing activated sludge processes. |
| Results show that the established model is able to better and mechanistically describe the heterotrophic storage and growth processes in activated sludge. | |
42 Citations | On-line measurements of the activity of activated sludge biomass may allow more efficient operation of treatment plants. |
| This may be their basic significance for the determination of technical parameters of the activated sludge process. | |
78 Citations | This indicated some properties of sludge constituents that deviate from natural biomass fractions. |
79 Citations | This study helps to understand the ecology of these organisms and the operational and control methods of the activated-sludge process. |
Related Questions
What are the definitions for biomass?5 answersBiomass refers to all non-fossilized biological materials, including forest residues, agricultural residues, energy crops, industrial residues, food wastes, municipal wastes, animal residues, and algal residues. It is a renewable source that is used for energy and non-energy purposes, such as fuel and power production, agricultural and industrial uses, and even for energy storage, sensors, and catalysis applications. Biomass is defined as any organic matter that is available on a renewable basis, including dedicated energy crops and trees, agricultural food and feed crop residues, aquatic plants, wood and wood residues, animal wastes, and other waste materials. It is the term used to identify organic matter generated from waste or living plants, such as trees, grass, and agricultural crops and residues.
How much is energy consumed in activated sludge process?5 answersThe energy consumed in the activated sludge process varies depending on factors such as plant design, agitator operation, and pretreatment methods. Agitators can consume about 5 to 20% of the total energy consumption of a wastewater treatment plant. The daily energy requirements for wastewater treatment per inhabitant range from 0.041–0.407 kWh/PE·d. Energy recovery through anaerobic digestion can offset about 50–60% of the total input energy of wastewater treatment plants with conventional activated sludge (CAS) process. The pressurized electro-osmotic dewatering (PEOD) process can achieve a volume-specific energy consumption of 0.153 kWh per kg removed water. Sludge degradation methods, including anaerobic digestion, have high potential for energy recovery. Overall, the energy consumed in the activated sludge process can be optimized through various strategies such as reducing power density, optimizing agitator operation, and implementing energy recovery technologies.
How does pore size affect biomass holdup in immobilization for wastewater applications?5 answersPore size plays a significant role in biomass holdup during immobilization for wastewater applications. The immobilization of biomass using different pore size membranes affects the filtration behaviors and biomass retention. In the case of anaerobic membrane bioreactors (AnMBRs) for wastewater treatment, the pore size of the membrane influences the total filtration resistance (Rt) and permeate flux. AnMBR1, with a 0.4 μm pore size membrane, exhibited an average Rt of 1.08 × 10^12 m−1 even at a high permeate flux of 0.274 m/day. On the other hand, AnMBR2, with a 0.05 μm pore size membrane, had a higher average Rt of 1.51 × 10^12 m−1 even at a low flux of 0.148 m/day. The differences in pore size affect the ability of the membrane to retain biomass and influence the overall performance of the immobilization system for wastewater treatment.
What is the definition of Biomass in seagrasses?4 answersBiomass in seagrasses refers to the total amount of organic matter present in the above-ground and below-ground parts of the plants. Seagrass biomass is distributed between leaves and rhizomes+roots, with a tendency for a balanced distribution between the two. The biomass of seagrass populations varies with species and latitude, with larger-sized seagrass species tending to have higher below-ground biomass. Seagrass biomass is an important indicator of the health of seagrass meadows and is used to assess the capacity of seagrass ecosystems to provide ecosystem services. The biomass of seagrasses is influenced by both abiotic factors such as light, temperature, and nutrient availability, as well as biotic factors such as herbivory and interaction with epiphytes. Accurate estimation of seagrass biomass is crucial for understanding and managing seagrass ecosystems at large spatial scales.
How can environmental waste biomass be used to purify water?5 answersEnvironmental waste biomass, such as agricultural waste, can be used to purify water by acting as low-cost adsorbents for the treatment of wastewater. These agricultural waste materials, including rice husk straw, crop waste, fruit peels, nut shells, and dry leaves, have been extensively studied and found to offer cost-effective and environmentally friendly solutions for water treatment. The biomass adsorbents can help reduce toxins, antinutritional factors, and microbial load from polluted water resources. Additionally, algal biomass cultivated from nonconventional sources, such as wastewater mesocosms, has shown promise in removing pollutants and excess nutrients from wastewater, improving its quality. Overall, the use of environmental waste biomass provides a sustainable approach to water purification, utilizing natural and green methods for the treatment of polluted water.
How can environmental waste biomass be used to remove contaminants from water?5 answersEnvironmental waste biomass can be used to remove contaminants from water through various methods such as adsorption, bio-adsorption, and microbial remediation. Agricultural waste biomass, including rice husk straw, crop waste, fruit peels, nut shells, and dry leaves, can be used as low-cost adsorbents for wastewater treatment. Algal biomass cultivated from nonconventional sources like wastewater mesocosms can also be used for the treatment of wastewater, removing pollutants and excess nutrients. Biomass-based technologies, including bio-adsorption using terrestrial and marine bioresources, agro-industrial wastes, and derived activated carbons, have been shown to effectively remediate emerging pollutants in contaminated wastewaters. Additionally, biomass charcoal derived from cow dung waste biomass has been found to simultaneously remove heavy metals and organic pollutants from water through adsorption, deposition, and distribution processes. Overall, the use of environmental waste biomass offers a sustainable and cost-effective approach for the removal of contaminants from water.