Treatment of municipal wastewater in upflow anaerobic. Another significant dispersion feature of an acidogenic uasb reactor is related with gas production rate. An example uasb design calculations spreadsheet is partially shown in the image below. The usab design is tailor made to suit the wastewater characteristics given in table 2. This excel spreadsheet can be used to calculate the required uasb reactor volume and dimensions, sludge production rate, methane production rate, and required alkalinity addition based on user input information on wastewater flow and characteristics.
In any case, proper design and operation of the reactor is required to provide the desired outcome. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. Reactors jordan university of science and technology. A simplified analysis of granule behavior in asbr and uasb.
Apr 10, 2014 upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used in the treatment of wastewater. The discrepancies in the initial uasb plants were recorded and now a new breed of uasb reactor is available with respect to the design, operation and maintenance, and materials of construction. Design, construction, and startingup of an anaerobic. Wastewater enters the reactor from the bottom, and flows upward. Reactor uasb ppt mio 2 aguas residuales quimica free. A laboratory scale uasb reactor was fabricated with a capacity of 3. The hydraulic detention times in the anaerobic treatment systems were 100, 75 and 58 h in the set i. The upflow anaerobic sludge blanket process uasb has been around for many years, so it clearly can work well. The contents presented in this paper focuses on the performance of uasb upflow anaerobic sludge blanket reactor for treating various industrial and domestic wastewaters at various operating conditions. It is a maintenancefree, corrosionfree and rugged process with a straightforward design. Upflow anaerobic sludge blanket uasb reactor in wastewater. Download as ppt, pdf, txt or read online from scribd. Comparisons between the uasb and the egsb reactor seung j.
Scribd is the worlds largest social reading and publishing site. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it the sludge blanket is comprised of microbial granules 1 to 3 mm in diameter, i.
It is a storage tank where the waste water from oil skimming tank comes and from the here is supplied is the uasb reactor. Uasb ponds these are modified andor simplified uasb reactors the complicated and costly 3phase separator is replaced no gas collection tunnels floating plastic collapsible membrane or fixed concrete slab is used for the gas collection deflectors are used underneath the treated effluent collection trough to separate out the. Mar 02, 2016 uasb ponds these are modified andor simplified uasb reactors the complicated and costly 3phase separator is replaced no gas collection tunnels floating plastic collapsible membrane or fixed concrete slab is used for the gas collection deflectors are used underneath the treated effluent collection trough to separate out the. Fdzpolanco department of chemical engineering, university of valladolid. Lim abstract some characteristics of upflow anaerobic sludge blanket uasb, expended granule sludge blanket egsb, and static granular bed reactor sgbr were investigated in order to compare performances of the three and recognize advantages and disadvantages, respectively. Uasb reactor treating liquid fraction of dairy manure. Chapter 4 anaerobic sewage treatment using uasb reactors. Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k.
Treatment of municipal wastewater in upflow anaerobic sludge. Application of uasb reactor in industrial wastewater. In other cases, reactions play essential safety and environmental protection roles. Download fulltext pdf dynamic model for uasb reactor including reactor hydraulics, reaction, and diffusion article pdf available in journal of environmental engineering 1233 march 1997. Determination of design criteria for uasb reactors as a wastewater pretreatment system in tropical small communities 1a. Treatment of dairy waste water using uasb reactor and.
Zamanzadeh 1department of environmental engineering, graduate school of the environment, university of tehran, iran. The maximum capacity chemical oxygen demand cod loading in upflow anaerobic sludge blanket uasb reactors is evaluated using three 8. Technical problems ensuing from uasb reactor application. Reactors reactions are usually the heart of the chemical processes in which relatively cheap raw materials are converted to more economically favorable products.
Up flow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester which used in wastewater treatment. The uasb reactor technical details have been previously given 22. Anaerobic treatment of cheeseproduction wastewater using a. The influent pump was operated every hour for 5 min and supplied 5. The pulseresponse technique was used in this study. Download as pptx, pdf, txt or read online from scribd. Uasb reactor ri was initiated by utilizing the digested sludge alone, whereas, the uasb reactor rii was startedup by adding an activated carbon of an effective size 1. For example, the authors were able to identify over 45 municipal uasb stps in india with an average daily flow rate of 10,000 m3 or more the largest stp was designed for a flow rate of 338,000 m3d1 while 15 such stps were identified in brazil. Web based training 2005 for treatment of raw or settled municipal wastewater at temperature 15oc in the uasb reactor hrt 4 8 hours, depending. Uasb anaerobic granular sludge bed technology refers to a special kind of reactor concept for the high rate anaerobic treatment of wastewater. In the set ii the posttreatment was performed in a sbr of 3,000 l. Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used in the treatment of wastewater. Pdf dynamic model for uasb reactor including reactor. Download this upflow anaerobic sludge blanket process ebook and keep it on your hard drive for later reference.
Comparisons between the uasb and the egsb reactor seung. This system was proposed for excess sludge stabilisation, particularly that generated at an activated sludge wastewater treatment facility installed in a sugarcane mill. Gas colector has been withdrawn to see biogas bubbles. The operating conditions are shown in tables 1, 2 and 3 for the asbr, the uasb reactor operated at both low and high superficial velocities, respectively. The upflow anaerobic sludge blanket reactor uasb is a single tank process.
Uasb reactor is a methaneproducing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. Uasb reactor startup for the treatment of municipal wastewater followed by advanced oxidation process 717 brazilian journal of chemical engineering vol. Uasb reactor in andeanamazonian conditions, except when working with very dilute dw. Water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Uasb design calculations spreadsheet low cost easy to use. Design, construction, and startingup of an upflow anaerobic sludge blanket reactor was carried out. Upflow anaerobic sludge blanket uasb technology, normally termed as uasb reactor, is a form of anaerobic digester for wastewater treatment. Also the excess of wastewaste that is present in uasb is again brought to the buffer tank.
Design, construction, and startingup of an anaerobic reactor. For two identical labscale uasb reactors seeded with the same level of sucroserich wastewater, the gas production rate in an acidogenic uasb reactor was onethird less than that in a methanogenic one. Degrada compuestos txicos, as como contaminantes orgnicos comunes en aguas residuales industriales. Maximum cod loading capacity in uasb reactors at 37 by herbert h. Uasb design calculations spreadsheet low cost easy to. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total organic pollution to the food processing industry alone. Dispersion analysis of an acidogenic uasb reactor sciencedirect. Gatze lettinga derecha, inventor del reactor uasb, junto al autor reactores circulares. Reactor uasb las bacterias ciencias fisicas avaliacao. May 17, 2017 an example uasb design calculations spreadsheet is partially shown in the image below. The process is essentially based on a special flow regime allowing the sewage to get into contact with a sludge blanket or sludge bed situated in the reactor, and a following 3phaseseparation of water, sludge and gas methane. Design of an anaerobic digester for wastewater treatment. We would like to show you a description here but the site wont allow us.
During this period, a significant effort was made to understand the mass. Anaerobic treatment of municipal wastewater in uasbreactors. The concept was initiated with upwardflow anaerobic sludge blanket uasb reactor. Uasb 1 total 2 uasb 1 total 2 uasb 1 total 2 faridabad zoneii 45 4557 7077 5867 7281 5769 6477 faridabad zoneiii 50 5167 6578 6673 6983 7178 7084.
Since the heights of sludge bed changed under varying hydraulic conditions, the measurement of tracer. It is especially attractive in tropical countries where the relatively high ambient temperature is close to the optimum for the mesophilic methanogenic bacteria leitao, 2004. But, unfortunately, this type of ad treatment can only handle quite low contamination levels in effluents, but with the. The uasb technology was developed for wastewater treatment in the past 20 years. To induce granulation process a small quantity of anthracite powder and crushed granules from the uasb reactor were added before the startup of the reactor. The upflow anaerobic sludge blanket uasb process is a frequently applied method in the biological treatment of industrial effluents. Anaerobic granular sludge bed technology is widely used in wastewater treatment and uasb is a proven process and becoming more and more popular for high strength industrial wastewater because of its. Rico guti6rrez department of chemistry, university of cantabria 39005 santander, spain p.
The uasb reactors in the first stage had 908 l in the sets i and ii, and in the second stage 350 and 188 l, respectively. The uasb reactor is a methanogenic methaneproducing digester. International journal of environmental science and development, vol. Web based training 2005 for treatment of raw or settled municipal wastewater at temperature 15oc in the uasb reactor hrt 4 8 hours, depending on the temperature and wastewater concentration. The uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic clarigester.
573 1010 674 572 1065 601 1337 626 1234 1082 1277 1462 232 1315 105 139 1541 397 640 1444 1287 13 640 77 1315 117 169 1068 806 134 166 143 523