Removal Characteristics of Coliform Bacteria in Biological Reactors at Domestic Wastewater Treatment System.

Takeda, Shigeru; Inaba, Akira; Kitahara, Setsuko; Iwahori, Keisuke

doi:10.2521/jswtb.35.211

Cited by 4 publications

(1 citation statement)

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“…Although complete inactivation was not expected, but the systems achieved considerable high reduction in TC at steady-state at low residual suspended solids concentration. The measured reduction are in coherence with the findings of earlier studies [53,54]. Following the considerable reduction in TC at lower suspended particles concentration, solids separation treatment and subsequent disinfection are most advised for improved effluent quality.…”

Section: Microbial Countsupporting

confidence: 84%

Appraisal of suspended growth process for treatment of mixture of simulated petroleum, textile, domestic, agriculture and pharmaceutical wastewater

Egbuikwem

Saroj

2019

Environmental Technology

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The unrestricted discharge of domestic and industrial wastewaters along with agricultural runoff water into the environment as mixed-wastewater pose serious threat to freshwater 2 resources in many countries. Mixed-wastewater pollution is a common phenomenon in the developing countries as the technologies to treat the individual waste streams at source are lacking due to high operational and maintenance costs. Therefore, the need to explore the potential of suspended growth process (SGP) which is a well-established process technology for biological wastewater treatment, is the focus of this paper. Different wastewater constituents: representing domestic, pharmaceutical, textile, petroleum, and agricultural runoff were synthesized as a representative of mixed-wastewater and treated in two semicontinuous bioreactors (R1 & R2) operated at constant operating conditions vis., MLSS (mg/L): 4640-R1, 4440-R2, SRT: 21-d, HRT: 48 -72-h, and uncontrolled pH. The system attained stable condition in day 97, with average COD, BOD and TSS reduction as 84.5, 86.2, and 72.2% for R1; and 85.1, 87.9, and 75.1% for R2 respectively. Phosphate removal on average was by 74.3% in R1 and 76.6% in R2, while average nitrification achieved in systems 1 and 2 were 56.8and 54.7% respectively. The biological treatment system has shown potential for improving the quality of mixed-wastewater to the state where reuse may be considered and tertiary treatment can be employed to polish the effluent quality.

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Section: Microbial Countsupporting

confidence: 84%