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Fresh water shortage is a global problem. Using seawater directly is a useful way for alleviating lack of water resource in coastal cities. The wastewater produced treatment is the key to wide application of the technology. In this study sequencing batch biofilm reactor (SBBR) was used for the treatment of saline municipal wastewater. The effluent of activated sludge treatment system can meet the...
This paper is focusing on the investigation of a novel anoxicoxic hybrid membrane bioreactor (A/O HMBR) for the treatment of landfill leach ate. This new technique combined an efficient anoxic and oxic biological treatment process with a membrane filtration unit and has the advantages of simplifying pre-treatment facilities, relieving the loading of the subsequent treatment processes and optimizing...
After discussing the complexity of activated sludge system, its biological mechanism, and characteristics of traditional activated sludge method, the paper established a cellular automata model for traditional activated sludge processes, and then made simulations with practical parameters. The results indicate that the model well represents the evolvement of microbe in one upright section through...
Wastewater treatment practices have been significantly improved since the introduction of novel microbial treatment technologies. The Sequencing Batch Reactor (SBR) system for ammonia removal over nitrite (SHARON) process by intermittent aeration as well as the key parameters of SHARON, were studied in this paper, which includes pH, temperature, dissolved oxygen (DO) and sludge age, to obtain the...
Sludge-glass ceramic particles were used as filter media for single biological aerated filter (BAF) to treat dairy wastewater in this study. Seed sludge was inoculated from Zhengzhou Wulongkou wastewater treatment plant. When bio-film was promoted and the effluent contamination removal rates above 40% after one week's operation, started to optimize the operation parameters such as pH, hydraulic retention...
A laboratory-scale sequencing batch reactor combined with humus soil (HS-SBR) and a sequencing batch reactor (SBR) fed with domestic wastewater were operated to examine the effect of varying sludge retention time (SRT) on the nutrient removal. With 10 days SRT. During acclimatize phase, TP removal efficiency for HS-SBR enhanced and shortened period of time to reaching the steady-state condition. It...
O-nitrobenzaldehyde (ONBA) manufacturing wastewater not only contains significant amount of oil-like substance, but also high salinity, total nitrogen (TN) content and concentration of dissolved organics resulting in high COD load. Oil-like substance could be removed from the wastewater by physical methods. However, dissolved COD compounds and TN could only be removed by biological or chemical treatments...
The formation and performance of granular sludge seeded with flocculating sludge was studied in a 4L sequencing batch reactor (SBR) treating a synthetic wastewater with sodium acetate as carbon source. By gradually reducing the settle time from 30 to 10 min, granule sludge was formed on day 20. The granules had a specific gravity of 1.0439, diameters of 0.5-2 mm, and sludge volume index (SVI) of less...
The parallel AN/AO process, first proposed by the authors to efficiently use denitrifying phosphorus removing bacteria, was briefly introduced in the paper. Key operational parameters i.e. influent feed ratio of AN unit vs. AO unit, internal mixed liquid suspended solids (MLSS) return ratio (IMRR), external sludge return ratio (ESRR), sludge retention time (SRT) and hydraulic retention time (HRT)...
Filled the divisional influent anaerobic baffled reactor (DIABR) with stuffing and the activated sludge of the secondary settling tank was inoculated for attaching bio-film to train anaerobic microorganism. The wastwater inpoured the reactor with ratio of 4:3:2:1 in the four compartments, the experiment compared with the single influent anaerobic baffled reactor (SIABR). The two reactors ran under...
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