scholarly journals IMPROVED MOBILE BED BIOFILM REACTORS TO TREAT CELLULOSIC WASTEWATERS

2019 ◽  
Vol 2019 ◽  
pp. 24-27
Author(s):  
Ioana Corina MOGA ◽  
Ovidiu IORDACHE ◽  
Gabriel PETRESCU ◽  
Elena Cornelia MITRAN ◽  
Irina Mariana SANDULACHE ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
New Technologies ◽  
Paper Mill ◽  
Biofilm Reactor ◽  
Biofilm Reactors ◽  
Mobile Bed ◽  
Different Types ◽  
Root Fungi ◽  
Biofilm Carriers ◽  
Materials Used

The wastewater treatment sector is a very dynamic field, in continuous development. New technologies are developed, or the existing ones are improved [1]. An efficient biological treatment is based on solid small plastic pieces (biofilm carriers) on which different types of microorganisms attach, develop and grow. This technology is known as Moving Bed Biofilm Reactor (MBBR) technology [2]. The most common materials used for the biofilm carriers’ realization are based on high density polyethylene. This technology is not yet applied for the treatment of the cellulosic wastewaters, since cellulose is hard to be removed by using conventional microorganisms that are usually used in biological wastewater treatment. Some of the authors propose an improved material for carriers to be used in tertiary treatment for textile, paper-mill or tannery wastewaters [3]. The biofilm carriers are adapted for fungal activity. The selected fungal strains (White Root Fungi) capable of removing cellulose from wastewaters [4] will be immobilized on special biofilm carriers. The improved carrier is designed to be used in a MBBR and to favour fungal development in the presence of competing bacteria. Several laboratory experiments related to the fungal attachment on the improved carriers were realized and the results are presented in the paper.

Small Wastewater Treatment Plants Based on Moving Bed Biofilm Reactors

1993 ◽  
Vol 28 (10) ◽  
pp. 351-359 ◽  
Author(s):  
H. Ødegaard ◽  
B. Rusten ◽  
H. Badin
Keyword(s):  
Wastewater Treatment ◽  
Pollution Control ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Chemical Plants ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Biofilm Reactors ◽  
Control Authority

In 1988 the State Pollution Control Authority in Norway made recommendations regarding process designs for small wastewater treatment plants. Amongst these were recommendations for biological/chemical plants where biofilm reactors were used in combination with pretreatment in large septic tanks and chemical post treatment. At the same time the socalled “moving bed biofilm reactor” (MBBR) was developed by a Norwegian company. In this paper, experiences from a small wastewater treatment plant, based on the MBBR and on the recommendations mentioned, will be presented.

Wastewater treatment with submerged fixed bed biofilm reactor systems – design rules, operating experiences and ongoing developments

2007 ◽  
Vol 55 (8-9) ◽  
pp. 83-89 ◽  
Author(s):  
S. Schlegel ◽  
H. Koeser
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Wastewater Treatment Plants ◽  
Fixed Bed ◽  
Systems Design ◽  
Biofilm Reactor ◽  
Ongoing Research ◽  
Biofilm Reactors ◽  
Pre Treatment ◽  
High Degree

Wastewater treatment systems using bio-films that grow attached to a support media are an alternative to the widely used suspended growth activated sludge process. Different fixed growth biofilm reactors are commercially used for the treatment of municipal as well as industrial wastewater. In this paper a fairly new fixed growth biofilm system, the submerged fixed bed biofilm reactor (SFBBR), is discussed. SFBBRs are based on aerated submerged fixed open structured plastic media for the support of the biofilm. They are generally operated without sludge recirculation in order to avoid clogging of the support media and problems with the control of the biofilm. Reactor and process design considerations for these reactors are reviewed. Measures to ensure the development and maintenance of an active biofilm are examined. SFBBRs have been applied successfully to small wastewater treatment plants where complete nitrification but no high degree of denitrification is necessary. For the pre-treatment of industrial wastewater the use of SFBBRs is advantageous, especially in cases of wastewater with high organic loading or high content of compounds with low biodegradability. Performance data from exemplary commercial plants are given. Ongoing research and development efforts aim at achieving a high simultaneous total nitrogen (TN) removal of aerated SFBBRs and at improving the efficiency of TN removal in anoxic SFBBRs.

Decentralized wastewater treatment using ‘Pumped Flow Biofilm Reactor’ (PFBR) technology

2016 ◽  
Vol 11 (1) ◽  
pp. 93-103 ◽  
Author(s):  
Shane Fox ◽  
Michael Cahill ◽  
Edmond O'Reilly ◽  
Eoghan Clifford
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
New Technologies ◽  
Phase 1 ◽  
Oxygen Demand ◽  
Biofilm Reactor ◽  
Small Scale ◽  
Mechanical Equipment ◽  
Phase 2 ◽  
Sludge Production

Clean water resources are imperative for sustainable development. Thus, protection and management of waters receiving wastewater discharges have received significant attention from policy and regulatory bodies. The quality of wastewater effluent must meet regional (e.g. Water Framework Directive), national and local discharge standards. In addition, there is now significant pressure on engineers and operators to reduce energy consumption, sludge production and operation/maintenance issues, particularly at small-scale and decentralized wastewater facilities. Therefore, significant interest has risen in new technologies and operational insights which can (i) minimize operating costs; (ii) simplify and reduce the use of mechanical equipment; (iii) result in low sludge production; and (iv) ease operation/maintenance. This study investigated the performance of a small-scale municipal wastewater facility over 5 months from commissioning. The facility uses a new biofilm-based technology – the pumped flow biofilm reactor. Two experimental periods Phase 1 (28 to 36 days) and Phase 2 (Days 100 to 146) were examined. During Phase 2, removal rates averaged 98% for 5-day biochemical oxygen demand (BOD5), 93% for total suspended solids, and 94% ammoniacal-nitrogen (NH4-N). Energy requirements averaged 0.22 kWh.m treated−3 and 1.74 kWh.kg-BOD5 removed−1. Extensive, camera-based studies revealed minimal excess sludge in the reactor tanks and sludge removal was not required during the study period. The use of vertically stacked plastic media to support the biofilm may have limited biofilm sloughing. Sludge yield during steady state operation was estimated at around 0.03 g-SS.g-COD removed−1. The study indicates that given careful design and operation, small-scale wastewater treatment systems can be as efficient as much larger, fully manned plants.

scholarly journals Test of Membrane Aerated Biofilm Reactors for Nitrogen Removal in Wastewater Treatment

2022 ◽  
Vol 2152 (1) ◽  
pp. 012039
Author(s):  
Cheng Chen
Keyword(s):  
Wastewater Treatment ◽  
Dissolved Oxygen ◽  
Oxygen Transfer ◽  
Removal Rate ◽  
Oxygen Transfer Rate ◽  
Ammonia Removal ◽  
Biofilm Reactor ◽  
Nitrification Rate ◽  
Permeable Membrane ◽  
Biofilm Reactors

Abstract Membrane aerated biofilm reactor, as a biological wastewater treatment technology, has been nearly mature on a commercial scale. It uses bubble-free aeration to provide oxygen for biological nitrification and wastewater degradation. A novel oxygen-permeable hollow fiber membrane (Zeelung cord) specifically designed for use in a membrane aerated biofilm reactors (MABR). These fibers are organized into bundles, which are wrapped around the reinforcing core to increase strength. This permeable membrane allows oxygen to diffuse into the attached biofilm, which directly leads to the biological oxidation of pollutants in the wastewater. This study aimed to determine the nitrification and oxygen transfer capacity of Zeelung fibers used in the MABR system. The effects of various C/N ratios (in the range of 1.0 to 3.0) on the membrane modules were studied using three laboratory-scale reactors over the course of 165 days. In this test, the average removal efficiency of COD can reach 74% under selected conditions, up to 90%. Meanwhile, the average nitrification rate is 3.9 g/d/m2, the average ammonia removal rate is 90%, and the maximum value can reach 99%. In addition, the oxygen transfer rate of the fiber in the liquid phase was 19.65 g/d/m2. The experiment also indicated that the nitrification rate is directly proportional to the transfer flux of oxygen and is related to the content of dissolved oxygen in the water. The nitrification rate can be controlled by controlling the concentration of dissolved oxygen in water, thus affecting the removal rate of ammonia nitrogen.

High-rate wastewater treatment combining a moving bed biofilm reactor and enhanced particle separation

2005 ◽  
Vol 52 (10-11) ◽  
pp. 117-127 ◽  
Author(s):  
H. Helness ◽  
E. Melin ◽  
Y. Ulgenes ◽  
P. Järvinen ◽  
V. Rasmussen ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Pilot Scale ◽  
Biofilm Reactor ◽  
High Rate ◽  
Treatment Concept ◽  
Moving Bed ◽  
Biofilm Reactors ◽  
Biofilm Process ◽  
Total Residence Time

Many cities around the world are looking for compact wastewater treatment alternatives since space for treatment plants is becoming scarce. In this paper development of a new compact, high-rate treatment concept with results from experiments in lab-scale and pilot-scale are presented. The idea behind the treatment concept is that coagulation/floc separation may be used to separate suspended and colloidal matter (resulting in >70% organic matter removal in normal wastewater) while a high-rate biofilm process (based on Moving Bed™ biofilm reactors) may be used for removing low molecular weight, easily biodegradable, soluble organic matter. By using flotation for floc/biomass separation, the total residence time for a plant according to this concept will normally be <1 hour. A cationic polymer combined with iron is used as coagulant at low dosages (i.e. 1–2mg polymer/l, 5–10mg Fe/l) resulting in low sludge production (compared to conventional chemical treatment) and sufficient P-removal.

Treatment of mountain refuge wastewater by fixed and moving bed biofilm systems

2004 ◽  
Vol 48 (11-12) ◽  
pp. 169-177 ◽  
Author(s):  
G. Andreottola ◽  
E. Damiani ◽  
P. Foladori ◽  
P. Nardelli ◽  
M. Ragazzi
Keyword(s):  
Wastewater Treatment ◽  
Fixed Bed ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Moving Bed ◽  
Trickling Filters ◽  
Advantages And Disadvantages ◽  
Biofilm Reactors ◽  
Adequate Knowledge ◽  
Start Up

Tourists visiting mountain refuges in the Alps have increased significantly in the last decade and the number of refuges and huts at high altitude too. In this research the results of an intensive monitoring of a wastewater treatment plant (WWTP) for a tourist mountain refuge located at 2,981 m a.s.l. are described. Two biofilm reactors were adopted: (a) a Moving Bed Biofilm Reactor (MBBR); (b) a submerged Fixed Bed Biofilm Reactor (FBBR). The aims of this research were: (i) the evaluation of the main parameters characterising the processes and involved in the design of the wastewater plants, in order to compare advantages and disadvantages of the two tested alternatives; (ii) the acquisition of an adequate knowledge of the problems connected with the wastewater treatment in alpine refuges. The main results have been: (i) a quick start-up of the biological reactors obtainable thanks to a pre-colonization before the transportation of the plastic carriers to the refuge at the beginning of the tourist season; (ii) low volume and area requirement; (iii) significantly higher removal efficiency compared to other fixed biomass systems, such as trickling filters, but the energy consumption is higher.

TREATMENT OF PULP AND PAPER INDUSTRY WASTEWATERS IN NOVEL MOVING BED BIOFILM REACTORS

1994 ◽  
Vol 30 (3) ◽  
pp. 161-171 ◽  
Author(s):  
Bjørm Rusten ◽  
Erik Mattsson ◽  
Astrid Broch-Due ◽  
Thorbjørn Westrum
Keyword(s):  
Paper Industry ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Biofilm Reactor ◽  
Design Data ◽  
Paper Mills ◽  
Moving Bed ◽  
Paper Mill Effluent ◽  
Biofilm Reactors ◽  
Scale Design

A new moving bed biofilm reactor (MBBR) has been developed, where the biomass is attached to small plastic elements that move freely along with the water in the reactors. Pilot-tests with these new biofilm reactors, have been performed at four different pulp and paper mills. The wastewaters tested were paper mill effluent, bleachery effluent, NSSC effluent and a mixture of CTMP and ground wood effluents. Good results were obtained with all the different wastewaters. These results are presented and discussed, together with full-scale design data for the MBBR treatment plants constructed at two of the mills.

Quantification of kinetic parameters for heterotrophic bacteria via respirometry in a hybrid reactor

2010 ◽  
Vol 61 (7) ◽  
pp. 1757-1766 ◽  
Author(s):  
Daniele Di Trapani ◽  
Giorgio Mannina ◽  
Michele Torregrossa ◽  
Gaspare Viviani
Keyword(s):  
Wastewater Treatment ◽  
Pilot Plant ◽  
New Technologies ◽  
Heterotrophic Bacteria ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Moving Bed ◽  
Carrier Material ◽  
Attached Biomass ◽  
Aerobic Reactor

Over the last decade new technologies are emerging even more for wastewater treatment. Among the new technologies, a recent possible solution regards Moving Bed Biofilm Reactors (MBBRs) that represent an effective alternative to conventional processes. More specifically such systems consist in the introduction of plastic elements inside the aerobic reactor as carrier material for the growth of attached biomass. Recently, one of the mostly used alternatives is to couple the Moving Bed Biofilm Reactor (MBBR) process with the conventional activated sludge process, and the resulting process is usually called HMBBR (Hybrid MBBR). In the MBBR process the biofilm grows attached on small plastic elements that are kept in constant motion throughout the entire volume of the reactor. Indeed, in such a system, a competition between the two biomasses, suspended and attached, can arise for the availability of the substrates, leading, as a consequence, to a modification in the biokinetic parameters of the two biomasses, compared to that of a pure suspended or attached biomass process. This paper presents the first results of a study aimed at estimating the kinetic heterotrophic constants in a HMBBR pilot plant using respirometric techniques. The pilot plant was built at the Acqua dei Corsari (Palermo) wastewater treatment plant and consisted of two parallel lines realized in a pre-anoxic scheme, in one of which the carrier material was added to the aerobic reactor with a filling ratio of 30%.

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