Implementation of attached growth system in Malaysia: An overview

2016 ◽  
pp. 235-239
Author(s):  
Gasim Hayder ◽  
Nur Fu’ad ◽  
Puniyarasen Perumulselum
Keyword(s):  
Attached Growth ◽  
Growth System

Attached versus Suspended Growth Anaerobic Reactors: Response to Toxic Substances

1983 ◽  
Vol 15 (8-9) ◽  
pp. 261-289 ◽  
Author(s):  
G F Parkin ◽  
R E Speece
Keyword(s):  
Chronic Toxicity ◽  
Waste Treatment ◽  
Plug Flow ◽  
Toxic Substances ◽  
Attached Growth ◽  
Industrial Wastewaters ◽  
Anaerobic Reactors ◽  
Suspended Growth ◽  
Solids Retention ◽  
Growth System

Anaerobic methane fermentation has significant potential for treatment of industrial wastewaters. Application of the process has been limited, due in part to the belief that the process cannot tolerate chronic and transient toxicity inherent in many industrial wastewaters. Experiments with cyanide, chloroform, formaldehyde, ammonium, nickel and sulfide have shown that the methanogens have the ability to recover from and acclimate to relatively high concentrations of toxicants. The key is proper attention to solids retention time. Of the two general reactor types used in biological waste treatment, attached growth systems offer two major potential advantages over suspended growth systems for treating wastewaters containing toxicants: (1) higher inherent solids retention times at relatively low hydraulic retention times and (2) the potential for a quasi plug-flow hydraulic regime that allows rapid elution of toxicants. For transient toxicity, the ability of a plug-flow, attached growth system to rapidly elute toxicants resulted in dramatically reduced down times when compared to a complete-mix, suspended growth system. For chronic toxicity, the solids retention capability of attached growth systems allows for acclimation to occur prior to washout of active biomass. Effluent recycle to plug-flow, attached growth systems should allow for more gradual exposure to chronic toxicity, thus maximizing acclimation potential.

The impact of biofilm thickness-restraint and carrier type on attached growth system performance, solids characteristics and settleability

2020 ◽  
Vol 6 (10) ◽  
pp. 2843-2855
Author(s):  
Raheleh Arabgol ◽  
Peter A. Vanrolleghem ◽  
Maria Piculell ◽  
Robert Delatolla
Keyword(s):  
Physical Properties ◽  
System Performance ◽  
Attached Growth ◽  
Biofilm Thickness ◽  
Growth System ◽  
The Impact

MBBR carrier type and physical properties have a significant effect on the solids production, detachment and subsequently the solids distribution size and settleability.

scholarly journals Effects of magnesium ions in microbial cells adhesion of attached growth system for the enhancement of biogas production

2020 ◽  
Vol 16 (1) ◽  
pp. 10-12
Author(s):  
Nabilah Aminah Lutpi ◽  
Wong Yee Shian ◽  
Tengku Nuraiti Tengku Izhar ◽  
Yiek Wee Kiong
Keyword(s):  
Biogas Production ◽  
Sucrose Concentration ◽  
Treatment Plant ◽  
Production Capacity ◽  
Anaerobic Sludge ◽  
Magnesium Ions ◽  
Batch Mode ◽  
Attached Growth ◽  
Thermophilic Conditions ◽  
Growth System

This research aims to improve the biogas production by employing cell immobilisation technique under thermophilic conditions. The thermophilic fermentative biogas production was carried out by immobilising the anaerobic sludge obtained from palm oil mill treatment plant on granular activated carbon (GAC) in repeated batch mode. Different concentration of magnesium ions (Mg2+) (0.25, 0.5, 0.75, 1.0 and 1.5 g/l) on biogas production was investigated at 60°C with an initial sucrose concentration of 5 g/l as feedstock. The effect of Mg2+ supplementation at the initial stage of immobilisation process is important to increase the formation of biofilm in the attached growth system. This study had found that Mg2+ could enhance the biogas production capacity with optimum Mg2+ concentration of 0.75 g/l.

A New Operation of Carbohydrate-Containing Wastewater Treatment in an Anaerobic Fluidized Bed System

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2453-2456 ◽  
Author(s):  
A. Matsumoto ◽  
M. Sakamoto ◽  
T. Noike
Keyword(s):  
Anaerobic Digestion ◽  
Fluidized Bed ◽  
Ph Value ◽  
Type Systems ◽  
Growth Type ◽  
Attached Growth ◽  
Optimum Ph ◽  
Effects Of Ph ◽  
Growth System ◽  
Ph Range

The effects of pH on the characteristics of conversion of starch to methane in anaerobic digestion were investigated by using a laboratory-scale anaerobic fluidized bed reactor over the pH range of 5.8-7.0. Furthermore, a new operation method was proposed to treat wastewater containing starch effectively. At pH 6.2, starch was decomposed well and methane was also formed well. The phenomenon showed methanogenesis in an attached growth system developed more tolerance for lower pH than in suspended growth type systems. After all, pH 6.2 was the optimum pH value for conversion of starch tomethane in our experiment. From these results, it is proposed that the more effective anaerobic digestion is made possible by the operation at low pH (for example 6.2) which accelerates acidogenesis and doesn't inhibit methanogenesis in attached growth systems.

Treatment of Wastewater Using an Integrated Submerged Attached Growth System

2014 ◽  
Vol 567 ◽  
pp. 167-171 ◽  
Author(s):  
Ezerie Henry Ezechi ◽  
Shamsul Rahman Mohamed Kutty ◽  
Mohamed Hasnain Isa ◽  
Ahmad Fitri Abd Rahim
Keyword(s):  
Nitrate Removal ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Ammonia Removal ◽  
Integrated System ◽  
Synthetic Wastewater ◽  
Biological Nutrient Removal ◽  
Attached Growth ◽  
Growth System ◽  
Solids Removal

The performance of a single sludge integrated attached growth system comprising of an aerobic and anoxic tanks in biological nutrient removal was evaluated in treating synthetic wastewater simulating medium strength domestic wastewater. An aero-packer and bio-balls were installed in the aeration and anoxic tank occupying about 40% and 25% of both tanks respectively. The efficiency of the integrated attached growth system was evaluated on the removal of chemical oxygen demand (COD), ammonia removal (NH3), nitrate removal (NO3), total suspended solids removal (TSS) and biochemical oxygen demand removal (BOD5). Effluent results show that the integrated attached growth system had a removal efficiency of 97.8% (COD), 97.5% (NH3), 87.5% (NO3), 97% (TSS) and 97.1% (BOD). These results support the viability of an integrated system in mitigating the enormous challenges of a conventional wastewater treatment.

Higher Biomass Productivity of Microalgae in an Attached Growth System, Using Wastewater

2014 ◽  
Vol 24 (11) ◽  
pp. 1566-1573 ◽  
Author(s):  
Seung-Hoon Lee ◽  
Hee-Mock Oh ◽  
Beom-Ho Jo ◽  
Sang-A Lee ◽  
Sang-Yoon Shin ◽  
...  
Keyword(s):  
Biomass Productivity ◽  
Attached Growth ◽  
Growth System

Implementation of attached growth system in Malaysia: An overview

2016 ◽  
pp. 235-239
Author(s):  
Gasim Hayder ◽  
Nur Farah Syazana Bt. Mohamad Fu’ad ◽  
Puniyarasen A.L. Perumulselum
Keyword(s):  
Attached Growth ◽  
Growth System
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