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A Cost Benefit Analysis (CBA) of Bio-waste Gasification as part of a techno-economic feasibility for establishing a small scale production facility for processing bio-waste into liquid fuels is presented in this paper. It is well known that transport sector is a big consumer of fossil fuels. Different bio-fuels are potential candidates to replace to petroleum based fuels in automobiles without requiring...
This work aims at comparing two oxygen control strategies for a biological Sequencing Batch Reactor to treat both carbon and nitrogen. The first strategy is a sequence of purely aerobic and anoxic phases, a strategy initially proposed by Mazouni et al. (2009), while the second is based on the use of a low constant oxygen concentration setpoint which could present a number of practical advantages over...
Textiles manufacturing consumes a considerable amount of water in its manufacturing process. However, commonly the manufacturers discharge their wastewater into environment without appropriate treatment. Wastewater from these industries usually content contaminant parameter due to dye content which can decrease the environment quality. In this research, the effect of several parameters such as agitation,...
In this research, the characteristic of COD and colour removal of azo dye by ozonation and biological treatment was evaluated for applying in azo dye industrial effluent treatment. Reactive Red 120, Remazol Brilliant Blue, Reactive Green 19 and Reactive Black 5 has been selected amongst azo dyes due to its high solubility in aquatic environment. COD removal was contributed simultaneously by ozonation...
In this paper, the sources and characteristics of organic acid wastewater were introduced firstly. Meanwhile, the current status and development of the common processing techniques are summarized. Based on the principle and applicability of treatment techniques, the advantages and disadvantages of various processes were analyzed and discussed in detail. The comparison demonstrates that using the biological...
The unstable treatment of produced water was one of the puzzles for the exploitation of extra-low permeability oilfield. This work was to give a comprehensive estimation for the characteristic of the extra-low permeability oilfield produced water. For this purse, the produced water samples were collected from the produced water treatment plant located in Daqing. The physical, chemical and microbiological...
Mature landfill leachate, containing high concentration of nitrogen, and low ratio of C/N, is difficult for biological treatment .In this paper, the leachate treatment of Jiangmen Landfill Site was studied. There is new requirement of the Standard for Pollution Control on the Landfill Site (GB16889-2008) of effluent TN concentration, after the processes of "SBR-Fenton-BAF". Two-stage BAF...
The alkaline wastewater from oil refinery is a high concentration alkaline wastewater, which contains a great deal of sulfide, phenol and oil pollutants. A novel two stage circulating biological aerated filter (CBAF) was used to treat the alkaline wastewater after its neutralization. The factors of various air/water volumetric ratio, hydraulic retention time (HRT), which affected the removal of COD,...
This thesis is based on Heishizi landfill lechate treatment, contrapose its limitation, and aim at optimizing Without Biomass Retention Sequential Intensified Pretreatment Reactor's functional parameter and inproving treatment efficiency. Conclusions can be drew that: with HRT's droping, ammonia nitrogen removal rate decrease, and TN removal rate is highest in case of HRT=5.3d; ammonia nitrogen removal...
The prediction and control for sludge acidogenic fermentation process has a guiding role for the biological treatment of acid mine drainage with SRB to select proper carbon source. Two mathematical models were used to predict sludge acidogenic fermentation process with semi-continuous operation mode. The results showed that quadratic polynomial regression model is superior to multivariate linear regression...
A new method of microorganism acclimation for biological treatment of high-salinity oilfield wastewater was proposed, in which the salinity was increased in logarithmic mode, while in the traditional method the salinity was mainly increased in proportion. A contrast experiments was made between new method and the traditional method. The quality of the influent is as follow: salt content was ranged...
Three dominant bacteria of A-1, B-1 and C-1 for phenol degradation were screened by domestication. Then study on the treatment efficiency of phenol by the three dominant bacteria was carried out under different concentration of phenol wastewater. The results showed that phenol removal efficiency decreased as the phenol concentration increasing. The phenol removal efficiency rates achieved 46.74%,...
Coagulation-Sedimentation process is to be used for advanced treatment of the effluent after secondary biological treatment of some petrochemical fiber company. By the study of jar tests, operating factors for petrochemical wastewater have been found out, including the optimum coagulant type, the best dosage and the best operating conditions. Mechanism of removing phosphorus was analyzed. The results...
According to the characteristic of high concentration and non-biodegradation of industrial effluents, temperature and hydraulic retention time (HRT) was related to the effect of operation in the reactor, an experimental study on hydrolysis acidification process as a preprocessing method. Results: with acidification pretreatment process as a means of biological treatment is effective, the effect of...
Washing coal usually brings about 0.2m3/t wastewater (in terms of closed circulation) due to transpiration, which provides an effective space for the recycle of coke-plant wastewater. The effluent from phenol-cyanogen wastewater biochemical disposal station is used as complementary water for washing coal, and Closed-Cycling System in coal preparation plant is introduced to make industrial experiment...
The aim of the investigation was to evaluate the nitrogen removal efficiency by using the combined partial nitrification and anaerobic ammonium oxidation (anammox) process for high-strength ammonium synthetic wastewater. The partial nitrification and anaerobic ammonium oxidation reactors were inoculate with domesticated sludge and operated respectively during the startup period. Subsequently, they...
Two different leachates of Chang'an landfill in Chendu were collected as the object of study. The components of organic pollutants in leachates were detected by combined GC-MS technique based on the general water quality analysis. Test results of study are as the follows: the type and nature of organic pollutant effect directly on leachate biodegradability. In high biodegradability (BOD5/CODCr = 0...
Hydrogen sulfur was regarded as the research object in this study. Correlated research of biological treatment of hydrogen sulfide was investigated. Domestication in an aeration flask was employed to screen out the optimal bacteria (Thiobacillus). Na2S was used as the inducer in the domestication period. Gas-liquid phase joint inoculation method could start up biotrickling filter effectively. The...
Di-(2-ethylhexyl) phthalate (DEHP) is one of the typical endocrine disrupting chemicals found in water and wastewater. Concentrations of DEHP in water, wastewater and reclaimed wastewater are summarized based on published literatures. Concentrations of DEHP in source water for drinking or final sewage effluents sometimes definitely exceeded legal stipulations for DEHP limits in China. Although physicochemical...
As one of the heavily polluted industrial wastewaters tannery wastewater, which is difficult to handle especially in winter at low temperature, has attracted intensive attention all over the world recently. This work investigated the application of coagulation-flocculation to improve the treatment of raw tannery wastewater at low temperature (10??C). Parameters such as coagulant-flocculant combination,...
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