Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 17 of 17 for “"Solids Destruction"”.
-
The Effect of Cations on Volatile Solids Destruction, Odors, and Dewatering in anaerobic digestion
… of wastewater sludge feed cations on volatile solids destruction, odor control, and dewaterability. The role of influent feed cations and addition of chemical coagulants to sludge were evaluated for those characteristics following anaerobic digestion. Wastewater sludge samples were obtained …
-
Developing a Mechanistic Understanding and Optimization of the Cannibal Process: Phase II
… retention time and the interchange rate on the solids destruction in the system. The first phase of this study has looked at the effect of three different HRTs, 5 day, 7 day and 10 day. The interchange rate during phase I was 10%. The results showed that the 7 day HRT can be recommended as the …
-
High-Intensity Shear as a Wet Sludge Disintegration Technology and a Mechanism for Floc Structure Analysis
… does not appear to enhance solublization of solids, though deflocculation and deterioration of dewaterablility was observed. Anaerobic digestibility appears to be enhanced by the addition of a high shear as shown by increases in gas production and volatile solids destruction. The dewatering …
-
Evaluation of Solubilization with Thermal Hydrolysis Process of Municipal Biosolids
… digestion has been adopted with an increase in solids destruction, COD removal, and methane gas. In this study, the evaluation of thermal hydrolysis process as a viable pretreatment strategy to anaerobic digestion has been conducted in order to assess its capacity for solids solubilization. …
-
Cations and activated sludge floc structure
… ammonium production, percentile volatile solids reduction and iron in floc were obtained. These data indicate that iron-linked protein is released to solution when iron is reduced and its degradation is responsible for volatile solids reduction in anaerobic digestion. In aerobic digestion, …
-
Effect of Long Chain Fatty Acids on Anaerobic Digestion of Municiapal Sewage Sludge in Completely Mixed Reactors
… The performance of the digesters in terms of solids destruction, COD degradation, LCFAs accumulation and gas production was investigated. After reaching steady state, a large amount of palmitic acid was found in the reactors with oleic acid addition and mixture of stearic and oleic acid …
-
The Effect of Pretreatment Methods on Methane Yield and Nutrient Solubilization During Anaerobic Digestion of Microalgae
… was assessed in terms of methane yield, volatile solids destruction, and solubilization of N, P, and K. The microalgae were harvested by sedimentation from outdoor wastewater-fed raceways ponds operated in coastal southern California. Four pretreatment methods (sonication, high-pressure …
-
Shear Forces, Floc Structure and their Impact on Anaerobic Digestion and Biosolids Stability
… to address the controlling factors of biosolids stability as they relate to mesophilic anaerobic digestion, dewatering processes and digestion enhancement by wet sludge disintegration technologies. The working hypothesis of this study is that digestion performance; nuisance odor generation …
-
Applications of microwave technology to wastewater treatment
… was used for the release of nutrients and the destruction of solids from secondary municipal sewage sludge. The significant factors affecting the MW/H₂O₂-AOP that would yield maximum soluble substrates were studied. Using a computer statistical software package for experimental design and data …
-
Cellulose mineralization in two-stage anaerobic digestion systems
… 4,000 mg/L/d. Thermophilic reactor dominated the solids destruction and methane production in the thermo-meso system. An OLR of 18.3 gCOD/L-reactor·d in conjunction with 3-day HRT was a threshold loading limit for this reactor;Under the similar OLRs, methane production rates of the acid-methane …
-
Mechanisms of Methanogenic Inhibition in Advanced Anaerobic Digestion
… of treatment temperatures, and mesophilic high solids digestion of thermally pretreated wastewater sludge (THD) were carried out. Enhanced digestion performance in terms of solids destruction and methane generation by THD relative to MAD was achieved, and was largely attributable to the …
-
Anaerobic Co-digestion of Microalgae with Food Waste and Wastewater Sludge
… algae biomass loaded at a rate of 4 g Volatile Solids (VS)/L-day with a 20-day residence time exhibited stable digestion and yielded an average of 0.23 L CH<sub>4</sub>/g VS <sub>Introduced</sub>. For digesters that contained algae biomass in the feed, the greatest methane yield of 0.40 mL …
-
Enhancing hydraulic performance of a multi-stage anaerobic digester for high solids cattle manure
… economic challenges when being applied to high solids substrate such as dry-lot cattle manure. In Colorado and the rest of the arid west, feedlot practices and dry climate combine to form a waste product that is very high in total solids (TS) content, from 50% up to 90% TS. Since the most common …
-
Implementation of Acid/Gas Digestion Approach to Maximize Volatile Fatty Acids Production from Municipal Sludge and a Techno-economic Feasibility Study
… acid digesters were operated at three different solids retention times (SRTs) (1.5, 2.0, and 2.5-days) to determine the optimum SRT that yielded the highest VFAs production. Subsequently, a semi-continuous thermophilic (50°C) acid digester (SRT 2.0-days) was coupled with a mesophilic (35°C) gas …
-
Anaerobic and Combined Anaerobic/Aerobic Digestion of Thermally Hydrolyzed Sludge
… concern over the safety of land applied biosolids. Many new alternatives are being researched for reducing excess sludge production and for more energy production. With an increase in solids destruction, the nutrients that are contained in sludge especially nitrogen, are released to solution …
-
Optimisation of anaerobic digestion of organic solid waste for the production of quality compost for soil amendment
… :2:1 as optimal for biogas production, volatile solids destruction and pH stability. The study also showed that the choice of waste mixture can be useful for pH control during anaerobic digestion of OFMSW. The second stage, investigated the factors affecting aerobic post-treatment of the …
-
Performance and Mechanisms of Excess Sludge Reduction in the Cannibal™ Process
… recycle stream were operated. In this study, the solids production in the Cannibal system was about 35-40% of the conventional system under steady state conditions. The reduction in waste sludge was optimized when the interchange rate, (the ratio of sludge fed from the activated sludge system to …