Treatment of low strength domestic wastewater using the anaerobic filter

1983 ◽  
Vol 17 (8) ◽  
pp. 903-909 ◽  
Author(s):  
H.A. Kobayashi ◽  
M.K. Stenstrom ◽  
R.A. Mah
Keyword(s):  
Domestic Wastewater ◽  
Anaerobic Filter ◽  
Low Strength

Integrated Treatment of Domestic Wastewater Using Anaerobic Filter-Constructed Wetland in Military Camps

2011 ◽  
Vol 356-360 ◽  
pp. 1331-1334
Author(s):  
Tao Lv ◽  
Wu Long Zhang ◽  
Xie Zhang ◽  
Feng Xue
Keyword(s):  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Integrated Treatment ◽  
Municipal Wastewater Treatment ◽  
Anaerobic Filter ◽  
Integrated Technique ◽  
Packing Layer

This paper studies through project cases the treatment effect of integrated technique of anaerobic filter and constructed wetland on domestic wastewater in military camps, and the method for preventing the blocking of anaerobic filter and constructed wetland packing. The results show that its average removal rate of COD, NH4+-N, TP and SS is 83.1%, 37.5%, 49.8% and 91.5% respectively, with effluent meeting the standard of Grade II in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002); as planned, two anaerobic filters, one for operation and the other laying fallow at a alternate period of 6 months, in combination of the design of spoil disposal, can effectively prevent the packing layer from being blocked; being preprocessed, anaerobic filter can effectively prevent the packing layer of constructed wetland from being blocked; in case of a certain difference in elevation, the integrated technique can achieve unpowered operation. Besides, it is easy to implement and manage at a low operational cost without professional technician, and can treat decentralized domestic wastewater, therefore, is suitable for camps.

Anaerobic Treatment of Low-Strength Domestic Wastewater Using an Anaerobic Expanded Bed Reactor

1998 ◽  
Vol 124 (7) ◽  
pp. 652-659 ◽  
Author(s):  
Anthony G. Collins ◽  
Thomas L. Theis ◽  
Srinivas Kilambi ◽  
Lin He ◽  
Spyros G. Pavlostathis
Keyword(s):  
Domestic Wastewater ◽  
Anaerobic Treatment ◽  
Expanded Bed ◽  
Low Strength

Treatment of domestic wastewater mixed with crushed garbage and garbage washing water by advanced gappei-shori johkaso

1997 ◽  
Vol 36 (12) ◽  
pp. 175-182 ◽  
Author(s):  
Toshihiro Sankai ◽  
Guoji Ding ◽  
Noritoshi Emori ◽  
Satoshi Kitamura ◽  
Kensho Katada ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Domestic Wastewater ◽  
The Other ◽  
Small Scale ◽  
Anaerobic Filter ◽  
Other Hand ◽  
Removal Efficiencies ◽  
Washing Water

By using an advanced anaerobic filter-contact aeration Gappei-shori Johkaso (AFAJ), a small-scale wastewater unit used in Japan, experiments of the treatment of the wastewater mixed with domestic wastewater and disposer wastewater which came from washing water of crushed garbage by disposer were made. After the introduction of disposer wastewater into domestic wastewater, BOD, TN and SS loads increased to 1.7 times, 1.1 times and 1.7 times, respectively. Results showed that in the 5-person-use type AFAJ, no remarkable decrease appeared to the BOD and SS removal efficiencies after introduction of disposer wastewater into domestic wastewater, however, TN removal efficiency decreased significantly. As a result, effluent BOD and TN concentrations were much higher than 20 mg·l−1. On the other hand, the 7-person-use type AFAJ, whose volume was 35 % bigger than that of the 5-person-use type AFAJ, could treat the above wastewater to be less than 20, 10 and 20 mg·l−1, respectively. In addition, it was shown that not many changes took place in the kinds and occurrence frequencies of protozoa and metazoa after the addition of the disposer wastewater, which suggested that the addition of disposer wastewater had increased the BOD and SS loads while it did not lead to much change in the component of the domestic wastewater.

Treatment of a Domestic Wastewater with UASB Reactors

1993 ◽  
Vol 27 (1) ◽  
pp. 195-203 ◽  
Author(s):  
A. Gnanadipathy ◽  
C. Polprasert
Keyword(s):  
Domestic Wastewater ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Digested Sludge ◽  
Stabilization Pond ◽  
Waste Stabilization Pond ◽  
Waste Stabilization ◽  
Anaerobically Digested Sludge ◽  
Low Strength ◽  
Uasb Reactors

This study investigated a feasibility of employing pilot-scale upflow anaerobic sludge blanket (UASB) reactors to treat a domestic (or relatively low-strength) wastewater. Four 30-1 UASB reactors, each with a 0.15-m inner diameter and 2-m height were used in this study which was conducted at an average ambient temperature of 30°C. Three reactors were inoculated with different types of seed sludge, namely: sludge from a facultative waste stabilization pond, anaerobically digested sludge and sludge from a UASB reactor treating a distillery wastewater. The fourth reactor was started without inoculum and was studied for possible self inoculation. Domestic wastewater was mixed with a stock glucose solution to increase the influent COD concentrations to about 600 mg/l. All four reactors were started with a hydraulic retention time (HRT) of 24 h, and this HRT was later reduced to 12, 6 and 3 h, consecutively, corresponding to the organic loading rates (OLR) of 0.4-0.6, 0.9-1.4, 1.8-2.8 and 3.6-6.0 kg COD/(m3.d), respectively. At the highest OLR or shortest HRT, there was about 90% removal of the influent COD in Reactors 1-3 while the methane (CH4) production rate was found to be 150 N1/kg COD removed with a methane (CH4) content of 75%. Reactor 4, without inoculation, could not develop sufficient amount of biomass to withstand the high OLR and its performance deteriorated at the HRT of 3 and 6h. The scanning electron microscopic (SEM) examinations of the sludge floc revealed the predominance of Methanothrix-like bacteria in all reactors. The experimental results obtained have suggested a technical feasibility of employing UASB reactors to treat domestic wastewaters. The facultative waste stabilization pond sludge and anaerobically digested sludge were found to be suitable inoculum sources for the UASB reactors treating this low-strength wastewater.

The effect of aeration and recirculation on a sand-based hybrid constructed wetland treating low-strength domestic wastewater

2016 ◽  
Vol 37 (15) ◽  
pp. 1923-1932 ◽  
Author(s):  
M. Zapater-Pereyra ◽  
E. Kyomukama ◽  
V. Namakula ◽  
J.J.A. van Bruggen ◽  
P.N.L. Lens
Keyword(s):  
Constructed Wetland ◽  
Domestic Wastewater ◽  
Low Strength

Treatment of low and medium strength sewage in a lab-scale gradual concentric chambers (GCC) reactor

2008 ◽  
Vol 57 (8) ◽  
pp. 1155-1160 ◽  
Author(s):  
L. Mendoza ◽  
M. Carballa ◽  
L. Zhang ◽  
W. Verstraete
Keyword(s):  
Removal Efficiency ◽  
Loading Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Organic Loading Rate ◽  
Medium Strength ◽  
Low Strength ◽  
And Performance ◽  
Scale Design ◽  
Final Effluent

One of the major challenges of anaerobic technology is its applicability for low strength wastewaters, such as sewage. The lab-scale design and performance of a novel Gradual Concentric Chambers (GCC) reactor treating low (165±24 mg COD/L) and medium strength (550 mg COD/L) domestic wastewaters were studied. Experimental data were collected to evaluate the influence of chemical oxygen demand (COD) concentrations in the influent and the hydraulic retention time (HRT) on the performance of the GCC reactor. Two reactors (R1 and R2), integrating anaerobic and aerobic processes, were studied at ambient (26°C) and mesophilic (35°C) temperature, respectively. The highest COD removal efficiency (94%) was obtained when treating medium strength wastewater at an organic loading rate (OLR) of 1.9 g COD/L·d (HRT = 4 h). The COD levels in the final effluent were around 36 mg/L. For the low strength domestic wastewater, a highest removal efficiency of 85% was observed, producing a final effluent with 22 mg COD/L. Changes in the nutrient concentration levels were followed for both reactors.

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