Bibliographic citations
León, J., Ochoa, R. (2016). Metodología para el desarrollo de lodo granular aerobio bajo distintas condiciones de carga volumétrica [Tesis, Universidad Nacional de Ingeniería]. http://hdl.handle.net/20.500.14076/5400
León, J., Ochoa, R. Metodología para el desarrollo de lodo granular aerobio bajo distintas condiciones de carga volumétrica [Tesis]. : Universidad Nacional de Ingeniería; 2016. http://hdl.handle.net/20.500.14076/5400
@misc{renati/260531,
title = "Metodología para el desarrollo de lodo granular aerobio bajo distintas condiciones de carga volumétrica",
author = "Ochoa Ojeda, Ronald Rodrigo",
publisher = "Universidad Nacional de Ingeniería",
year = "2016"
}
Our country has been applying new environmental regulations that propose a challenge for economic activities, especially for the industrial sector which is forced to give a correct provision to its solid and liquid waste. Manufacturing plants which are settled in cities and suburban areas lack with space and budget for the implementation and maintenance of wastewater treatment systems, for this reason it is important to conduct research on viable technology under these conditions. The aerobic granular sludge (LGA) technology for wastewater treatment has been investigated in developed countries due to its wide advantages over conventional biological treatment methods, advantages such as space reduction, removal efficiency of organic matter and nutrients and simple operation and maintenance. It is a suitable alternative for solving the current problems described for the industrial sector and its liquid waste. This thesis define a methodology for aerobic granular sludge development using an activated sludge inoculum, which is used to treat industrial wastewater from organic production of anthocyanin dye native sweet potato; this methodology also controls the operational parameters in three (03) SBR reactors working in parallel in 24 hour cycles biological reaction. It has been applied different volumetric organic loads (CV) in the reactors from the variation in the percentage of volume extracted as effluent (% VER), assigning values of VER to each reactor, 60% for the reactor R1, 50% for the reactor R2 and 40% reactor for R3. The intensity of aeration was kept constant at 3.72 cm/s and the retention time of solid (or cell) TRS was 20 days to promote the generation of extra-cellular polymers (EPS) base for microbial aggregation. Selectors processes of microorganisms have been implemented such as batch feeding strategy, short filling times and reduced settling times, the last one is consider the main parameter during aerobic granulation. The granulation methodology consists of successive reduction of sedimentation time during each operating round of the SBR reactors using a mathematical expression to guide the process. This methodology aims to reduce the settling time of 30 minutes characteristic of flocculent sludge to 5 minutes estimates for granular sludge. The proper settling property of the new sludge formed is controlled using the sludge volumetric index (SVI) in the settling time proposed for each batch. This thesis has needed two stages of research, due to during the first stage with CV of 1.80, 1.50 and 1.20 Kg COD/m3.d for reactors R1, R2 and R3 respectively, it has been applied only one metabolic selector process of batch feeding or feast-famine phases, which was not effective for control of filamentous organisms forming "Bulking" during granulation. Thus during the second stage it was decided to apply an additional selector process which include a phase of anaerobic reaction prior to aeration (1 to 7), This stage with CV of 2.40, 2.00 and 1.60 Kg COD/m3.d for reactors R1, R2 and R3 respectively. In the reactor R1 (VER 60%) it was obtained granules of Ø1mm diameter with compact structure and regular form at 51 operating batch wise, this granules have settling time of 1.65 minutes, SVI of 109.86 L/Kg and SSV 3.368 mg/L. According to the results it was found that granulation is promoted with greater organic loads CV and high proportions of volume exchange ratio VER. The growth of filamentous organisms can be controlled by using a phase anaerobic reaction and the necessary reduction of settling time to get a good aerobic granulation can be applied under an exponential expression. Sixty five days was necessary to achieve aerobic granules with 1.50 minutes of settling time. The final sedimentation rate reached by the granule was 9.432 cm / min (three times a flocculent sludge sedimentation rate). During the investigation the consumption of organic matter of the reactors developed efficiencies of 95% in COD removal, it follows a first order reaction to substrate consumption.
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