Anaerobic up flow fluidized bed reactor performance as a primary treatment unit in domestic wastewater treatment

Abstract

The fluidized bed UASB performance was studied in this experiment as a primary unit the anaerobic unit the advantage of better generated sludge characteristics and smaller tank volume.The reactor performance was investigated for the treatment of domestic wastewater with unexpected industrial water flows at different operational temperatures (14-25°C) and loading rates. For each temperature range the reactor performance was studied under different hydraulic loadings HRT (6, 4, 2.5 h).The best methane yield rate and COD total removal rate are 0.285 l/g COD total and 70.82% respectively at warm working temperature 19°C with OLR 7.76 kg COD/m 3 /day and HRT 6 h.On the low temperature operation, the average COD removal of the reactor was 55.28% and 50.33% for HRT of 4 h and 2.5 h respectively. The methane production dropped to 0.1623 & 0.0988 L CH 4 /g COD with average organic loading rate of 5.34 & 10 kg COD/m 3 /day for HRT of 4 h and 2.5 h respectively.The efficiencies of Total nitrogen removal ranged between 2.23 and 10.83% with an apparent decrease during the low temperature high rate stages. Nitrite removal was in the range of (23.08-77)% with up to the 2 mg/L in the effluent water when obtaining high organic loading and warm temperature. These results demonstrated that the domestic wastewater could be anaerobically treated in a fluidized bed UASB reactor with very low HRT reaching 2.5 h. ª 2015 Production and hosting by Elsevier B.V. on behalf of Housing and Building National Research Center.

Performance of up-flow anaerobic sludge blanket followed by continuous-flow sequencing batch reactor

“…The organic loading rate ranged between (0.22-2.27) kg/m 3 /day and the biogas production ranged between (37.1-275.3) ml/gm COD removed which was relatively low if compared to the values mentioned in Tchobanoglous et al [9]. On the other hand, it was near to the results reported by [10], which ranged between (160-285) mL/gm COD for the same organic loading for domestic wastewater.…”

Phenol degradation and chemical oxygen demand analysis of coir retting wastewater using anaerobic treatment

“…Total biogas production increased with time. The amount of dissolved methane in the wastewater affected the intrinsic property of anaerobic process ( Moharram et al, 2016;Elangovan and Sekar, 2016;Agarwal et al, 2001).…”

Effectiveness of Phytoremediation Treatment of Pre-Treated Domestic Wastewater

“…The domestic wastewater contains a high ratio of organic and nutrient matters where pre-treatment processing is not enough to remove it (Choi et al, 2017). The pre-treatment process usually involves the technologies of the bar screen, grit chamber, and sedimentation tank, in which the characteristics of wastewater are optimized before the disposal stage (Moharram et al, 2016). Moreover, some large domestic facilities use advanced technologies such as activated sludge processes in treating these types of wastewater (Varjani et al, 2020).…”