Anaerobic Treatment of Domestic Sewage and Wastewater

Lettinga, G.; Man, A. de; Wiegant, W.M.; Knippenberg, K. van; Frijns, Jos; Buuren, J.C.L. van

doi:10.2166/wst.1993.0179

Cited by 154 publications

(79 citation statements)

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“…Comparison of the two rounds of experimentation showed that the COD removal efficiency of the anaerobic reactor increased with an increase in HRT and temperature, and decreased with an increase in OLR. This agreed with the findings of [13], who reported a COD removal rate of 65% at high temperatures in a UASB reactor, which decreased to a removal rate of 55% when the temperature was reduced to between 13 °C and 17…”

Section: °Csupporting

confidence: 92%

Experimentation on the anaerobic filter reactor for biogas production using rural domestic wastewater

Ladu

Lü

Zhong

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract-The biogas production from anaerobic filter (AF) reactor was experimented in Taihu Lake Environmental Engineering Research Center of Southeast University, Wuxi, China. Two rounds of experimental operations were conducted in a laboratory scale at different Hydraulic retention time (HRT) and wastewater temperature. The biogas production rate during the experimentation was in the range of 4.63 to 11.78 L/d. In the first experimentation, the average gas production rate was 10.08 L/d, and in the second experimentation, the average gas production rate was 4.97 L/d. The experimentation observed the favorable Hydraulic Retention Time and wastewater temperature in AF was three days and 30.95°C which produced the gas concentration of 11.78 L/d. The HRT and wastewater temperature affected the efficiency of the AF process on the organic matter removal and nutrients removal as well. It can be deduced from the obtained results that HRT and wastewater temperature directly affects the efficiency of the AF reactor in biogas production. In conclusion, anaerobic filter treatment of organic matter substrates from the rural domestic wastewater increases the efficiency of the AF reactor on biogas production and gives a number of benefits for the management of organic wastes as well as reduction in water pollution. Hence, the operation of the AF reactor in rural domestic wastewater treatment can play an important element for corporate economy of the biogas plant, socio-economic aspects and in the development of effective and feasible concepts for wastewater management, especially for people in rural low-income areas.

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Section: °Csupporting

confidence: 92%

Experimentation on the anaerobic filter reactor for biogas production using rural domestic wastewater

Ladu

Lü

Zhong

2017

IOP Conf. Ser.: Earth Environ. Sci.

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“…Many studies have mentioned that UASB digesters need to be inoculated with sludge for full reactor efficiency. Without using seed culture, startup of the reactor was considered to be feasible after 6 -12 weeks at a HRT of 6 h and temperature above 20 ºC (Lettinga et al, 1993). …”

Section: Effect Of Sni During the Uasb Start-up Periodmentioning

confidence: 99%

“…However, to shorten the start-up period, the reactor is often inoculated with active microorganisms or granules, otherwise it takes more than three months or longer to achieve full efficiency for municipal wastewater (MWW) (Lettinga et al, 1993). Before direct treatment of wastewater, the UASB reactor passes through a start-up time period with selected nutrients as substrate.…”

Section: Introductionmentioning

confidence: 99%

UASB reactor startup for the treatment of municipal wastewater followed by advanced oxidation process

Bhatti

Maqbool

Malik

et al. 2014

Braz. J. Chem. Eng.

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-The present study was done to shorten the start-up time of up-flow anaerobic sludge blanket (UASB) reactor. Two different nutrients were used during the UASB start-up period, which was designed to decrease the hydraulic retention time (HRT) from 48 to 24 and 12 to 6 hrs at average temperatures of 25-34 ºC. In the first stage, start-up was with glucose for 14 days and then the reactor was also fed with macro-and micronutrients as a synthetic nutrient influent (SNI) from 15 to 45 days as the second stage. For the control, a second reactor was kept on glucose feeding from day 1 to 45. The removal efficiencies of the chemical oxygen demand (COD) were 80% and 98% on the 6 th and 32 nd day of the first and second stage, respectively. The maximum substrate removal rate of 0.08 mg COD mg -1 VSS d -1 was observed for glucose and synthetic nutrient influent (SNI) on the 8 th and 40 th days, respectively. When the reactor reached the maximum COD removal efficiency it was then shifted to municipal wastewater (MWW) mixed with industrial wastewater. The HRT was reduced gradually with a one week gap while treating MWW. For further cleaning, the UASB effluent was treated with 40% waste hydrogen peroxide. The whole integrated treatment process was successful to reduce the COD by 99%, total suspended solids (TSS) by 73%, total nitrogen (TN) by 84% and turbidity by 67%.

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“…Today the UASB reactor has become the most popular highrate reactor for anaerobic treatment of wastewater throughout the world [1,2]. The UASB reactor has been used increasingly in recent years to treat a variety of industrial waste and municipal waste.…”

Section: Introductionmentioning

confidence: 99%

“…Many factors contribute, in one form or another, to the granulation process [6,7]. Granulation may be initiated by bacterial adsorption and adhesion to inert matters, to inorganic precipitates [2,8], and/or to each other through physico-chemical interactions and syntrophic associations [9]. These substances serve as initial precursors (carriers or nuclei) for further bacterial growth.…”

Section: Introductionmentioning

confidence: 99%

Effect of ferrous iron on the settling properties of granular sludge in a UASB reactor

Vlyssides¹,

Barampouti²,

Mai³

2006

WIT Transactions on Ecology and the Environment, Vol 92

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The effect of ferrous ion addition on the settling properties of the granules in an upflow anaerobic sludge blanket (UASB) reactor was investigated. A UASB reactor (35ºC; pH=7) was operated for 3 months at a 20-h hydraulic retention time ( d-1 . After steady state conditions were achieved, the settling properties of granular sludge from the anaerobic sludge bed reactor were determined by using a novel upflow velocity test. From the results, it was concluded that iron promoted granulation. The U10% (10% of sludge washed out by applying upflow velocity U10%) was increased from 0,23 m.h -1 to 13,21 m.h -1 , while U30% from 0,87 m.h -1 to 29,11 m.h -1 and U60% from 6,63 m.h -1 to 49,82 m.h -1 .

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Anaerobic Treatment of Domestic Sewage and Wastewater

Cited by 154 publications

References 0 publications

Experimentation on the anaerobic filter reactor for biogas production using rural domestic wastewater

Experimentation on the anaerobic filter reactor for biogas production using rural domestic wastewater

UASB reactor startup for the treatment of municipal wastewater followed by advanced oxidation process

Effect of ferrous iron on the settling properties of granular sludge in a UASB reactor

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