Study on the Performance of Modified UASB Process Treating Sewage

Zhang, Sujuan; Liu, Nai Rui; Zhang, Cong Xiao

doi:10.4028/www.scientific.net/amr.610-613.2174

Cited by 9 publications

(5 citation statements)

References 4 publications

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“…The COD removal efficiency of a UASB reactor also decreases at elevated upflow velocity because higher velocity reduces the contact time between sludge and leachate in addition to smashing of sludge granules, and consequently higher washout of solids [28]. For instance, Nkemka and Murto [28] reported 81% COD removal efficiency at HRT of 12 h in a UASB reactor treating seaweed leachate, while Zhang et al [29] reported 92% COD removal efficiency at HRT of 10 h in a UASB reactor treating sewage. It is also important noticing that the volume of biogas produced towards the end of HRT 48 was insignificant.…”

Section: Biogas Productionmentioning

confidence: 99%

Influence of hydraulic retention time on biogas production during leachate treatment

Baâti¹,

Makan²,

Bouadili³

et al. 2018

Environmental Engineering Research

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The main objective of this study is to investigate the influence of hydraulic retention time (HRT) on biogas production during leachate treatment using an anaerobic reactor type Upflow Anaerobic Sludge Blanket. For this purpose, four HRTs ranging from 12 to 48 h were experienced. The obtained results showed that higher amount of biogas could be produced during longer HRTs. However, HRTs longer than 48 h could not affect clearly the biogas generation and considered as unnecessary given the small additional amount of biogas produced during the degradation process. A volume of 0.434 L/Lleachate/d was achieved during the treatment with a HRT of 48 h. The higher biogas production, the smaller chemical oxygen demand (COD) values achieved. Besides, COD removal and biogas production positively correlate, showing that the active biomass has degraded effectively the organic load to produce biogas. Moreover, all the analyzed physicochemical parameters have experienced a decrease after 48 h except for the pH, which increased to approximately neutral value. More precisely, a decrease of 93.8%, 89.7%, 95%, 70%, 77%, and 84.4% was recorded for COD, electrical conductivity, total suspended solid, turbidity, NH4 +-N, and NO3-N, respectively.

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Section: Biogas Productionmentioning

confidence: 99%

Influence of hydraulic retention time on biogas production during leachate treatment

Baâti¹,

Makan²,

Bouadili³

et al. 2018

Environmental Engineering Research

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“…For higher temperature at pH = 7 the COD removal was higher [ 34 ]. This was because an increase in pH in the range of 6.3–7.8 increase methanogenesis [ 35 , 36 ]. The plot also showed that at pH 7, the % removal of COD was seen to be maximum at a temperature of 24.5 °C beyond this pH the % removal of COD was decreased this is because methanogenesis process is hindered [ 37 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

Performance enhancement of up-flow anaerobic sludge blanket reactor for psychrophilic temperature during the dry season: Kality wastewater treatment plant

Girma,

Kemal,

Nigussie

2023

Heliyon

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“…2 It depends on various factors such as acclimatization of seed sludge along with pH, nutrients, organic loading rate, up-flow velocity, HRT, liquid mixing, presence of toxic compounds and reactor design duly effects the development of sludge bed. 29,52 Excellent performance of HUASB reactor is depending on the formation of well settled and greatly active granular sludge, with a high methanogenic activity.…”

Section: Huasb Treatment Initialization and Optimizationmentioning

confidence: 99%

Optimized Hybrid Upflow Anaerobic Sludge Blanket with Post Treatment Processes for Wastewater

Patel

Gundaliya

Amin

2021

Curr. World Environ

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This paper presents a review and findings of the Hybrid Upflow Anaerobic Sludge Blanket (HUASB) technologies, deploying lab scale reactors for treatment of domestic and industrialwastewater. The major controlling parameters for HUASB reactors such as inert media used, pH, temperature, upflow velocity, organic loading, hydraulic residence time along with startup and granulation are highlighted for its efficient performance and achieving optimum results. Wastewater arising from a plethora of industrial activities along with its characteristics has been included in conjunction with its treatability with different types of HUASB reactors. This review study found that inert media in different types of HUASB reactors are varied in the range of 10-40% of reactor volume, the COD removal efficiency of 41-99% along with methane generation 50-75% of biogas produced. Moreover, this review paper highlighted and studied the post treatment options for enhanced effluent water quality and energy recovery. Therefore, to achieve sustainability and circular economy different types of HUASB technology with suitable post treatment can be adopted for the purpose of domestic and industrial wastewater treatment and reuse.

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Study on the Performance of Modified UASB Process Treating Sewage

Cited by 9 publications

References 4 publications

Influence of hydraulic retention time on biogas production during leachate treatment

Influence of hydraulic retention time on biogas production during leachate treatment

Performance enhancement of up-flow anaerobic sludge blanket reactor for psychrophilic temperature during the dry season: Kality wastewater treatment plant

Optimized Hybrid Upflow Anaerobic Sludge Blanket with Post Treatment Processes for Wastewater

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