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The paper is aim to discuss the dye wastewater treatment by sewage sludge-based adsorbent. The adsorbent derived from sewage sludge , which produced through phosphoric acid-microwave method, and commercial activated carbon (ACC) were tested in the process of the Reactive Light Yellow dye wastewater treatment. The effects of pH value, contact time and the adsorbents' amount on the adsorption efficiency...
Using the anaerobic granular sludge acted as biosorbent, this paper studied the biosorption and desorption of copper-containing wastewater. The results showed that, granular sludge adsorption rate up to 97.67% and citric acid got best desorption efficiency. The study of kinetics model and thermodynamics isotherm adsorption model showed that Pseudo-second Order kinetic model and Langmuir isothermal...
Preparation of efficient adsorbents with sewage sludge and its application in chromium-containing wastewater treatment was discussed. The chemical physics activation method was used to dispose secondary sedimentation tank sludge and the final residual sludge to produce activated carbon, respectively. The effect of concentrations of oxidizer, activated temperature, solid-liquid ratio and activation...
This paper aims at exploring the feasibility of adsorption filtration technology using reclaimed iron sludge coated sand (RISCS) as filter media for municipal wastewater reuse. The iron sludge as surplus waste solution derived from ferric-carbon micro-electrolysis process. Scanning electron microscope (SEM), Infrared spectroscopy (IR) and X-ray diffraction (XRD) analysis were used to investigate the...
The performance and enhancement of pollutants removal in raw municipal sewage by a new pretreatment process were investigated in this study. The experiments were carried out with a GS sedimentation tank in full scale plant. The results revealed that average removal efficiency of TP, TSS, and TN achieved 49%, 67.3% and 20% respectively during stable running period. TSS removal rate could achieve about...
The sludge carbon made from sewage sludge with ZnCl2 are used for gatifloxacin adsorption. Characterizing sludge carbon and researching mechanism of gatifloxacin adsorption on different adsorbents. The results showed: sludge carbon have large surface area and mid-hole structure. The adsorption keep to second kinetics model, that means chemical adsorption is the main progress. The research proves sludge...
Ammonium adsorption characteristics of the denitrifying filter and the biologically aerated filter backwashed sludge and influence factors such as sludge concentration, sludge activity and effect of chemical coagulants were investigated. Ammonium was found to be adsorbed to both kinds of backwashed sludge. The backwashed sludge in biologically aerated filter adsorbed more ammonium than that in denitrifying...
The removal of Cu2+ and Cd2+ of aqueous solution by residual sludge from four type sewage treatment plant was investigated. Effect of adsorption time, kinetics and thermodynamics of adsorption was researched. The study indicated that all of the sludge can absorb mono-component Cu2+ or Cd2+ but the sludge from Petrochemical Wastewater plant had deposition rather than adsorption on Cu2+ or Cd2+. The...
In this study, a combined treating process (neutralization, electrolysis, ozone oxidization, coagulation and cinder adsorption) was introduced to investigate the possibility of degradation of concentrated azo dye wastewater. The optimum operation parameters were obtained through small-scale bench tests and pilot-scale tests, and then were put into operation. The experimental results showed that the...
The nitric acid industry in the China is a major industrial source of NOx, an important contributor to the air pollution. This project aims at developing a technique for the removal of NOx by biological method. The use biological packing tower to remove NOx tail gas after alkali adsorption from nitric acid production was investigated by a field experiment. The biological packing tower, using slag...
Considering the complexity and abundant kinetics behaviors of activated sludge, the paper established a cellular automata model (CAM) for adsorption and biodegradation in activated sludge process. The simulations with practical parameters were made. The results indicate that the CAM replicates complex adsorption and biodegradtion, and well describes the removal of biochemical oxygen demand (BOD) and...
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