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Dying-printing wastewater is treated under micro-aerobic situation in IC reactor, the experiment uses 10%PAC and 0.05%PAM, with the ratio of the raw water to flocculent 400:1, after coagulating sedimentation, the biochemical performance of the wastewater is greatly improved, up to about 0.22; when influent loads is improved to about 4655.1mg/L, dissolved oxygen concentration 0.3mg/L and HRT 5h, the...
Biomass energy is a renewable and potential resource. In order to research the conversion of cornstalk biomass (the agricultural residues) into the fuel methanol and the effective utilization of biomass energy, the low-heat-value cornstalk gas was produced by means of the thermo-chemical method in the down-flow fixed bed gasifier. The cornstalk gas was purified and the technical procedures such as...
Current researches on the phase of interferometric Synthetic Aperture Radar (abbreviated as InSAR) images are restricted to the homogeneous scene with spatially constant backscatter coefficients. But in reality, there are many unknown targets or sealers with high backscatter coefficients in the ground scene, which produce several bright spots (called isolated points) in the SAR image. The phase statistical...
Through comparing the effluent quality under three conditions with different dissolved oxygen concentration in A2/O bioreactor, results showed that the aeration and TN removal rate under condition 3 compared with the condition 1 reduced 52.6% and enhanced roughly 12% respectively. Under the condition 3, the low oxygen condition reduced the sludge nitration performance, but it still could have NH4+...
The biological purification device that combined the aeration-ship technology and biological contact oxidation was applied to the eutrophic river water treatment of Dongfeng channel in Zhengzhou. The removal efficiency of combined packing and elastic packing to chemical oxygen demand, NH3-N, TP in different dissolved oxygen (DO) and hydraulic loading showed that combined packing performance was better...
Denitrifying phosphorus removal is a kind of new efficient technology, and can alleviate the contradictions of urban sewage with low-carbon sources. This research took wastewater from a sewage treatment plant in Beijing as study object. Results showed that there was obvious phenomenon of denitrifying phosphorus removal and this phenomenon was gradually strengthened in A2/O process.
The raw water was diluted in four levels of 20%, 40%, 60%, 80% in the bio-membrane initiating process. When the raw water concentration was invariable , and hydraulic retention time, dissolved oxygen, pH and water temperature were 3 h, 3.5 mg/L, 7.05 ~ 8.23, 17.4 ~ 30.6°C respectively. Results showed removal rates of combined packing to COD, BOD5, NH3-N and TP were about 76.3%, 78.4%, 74.9% and 58...
Using conventional activated sludge of breweries as the inoculation sludge, stable aerobic granular sludge was fostered successfully in sequencing batch reactor, and applied to municipal sewage disposal. At room temperature, chemical oxygen demand and NH4+-N removal efficiency of aerobic granular sludge was surveyed. Results indicated that chemical oxygen demand and NH4+-N average removal efficiencies...
The article intends to introduce the authors' experimental study on adsorption behaviour of chitosan solution on silica by reflectometry. Effect of pH on adsorption has been studied. The adsorbed amount ?? was 0.80, 0.35 mg??m-2 at pH6.8 and 6.0, respectively. Zeta potential measurements and dynamic light scattering have been measured in the experiment.The mechanism of the adsorption process are likely...
As an emerging pharmaceutical and personal care products (PPCPs), tetracycline was selected as a model pollutant for electrochemical oxidation using commercial DSA. The effect of electrode potential across the anode and cathode and those of sodium sulphate and sodium chloride were investigated. It demonstrated that the increase of the potential across the electrodes from 4 V to 12 V improved the decolorization...
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