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Bio-sorption of Pb2+ ion from wastewater with Chlorella was investigated in the batch mode. The influence of pH of the solution, biosorbents dose, concentration of ions and contact time on bio-sorption capacity of Pb2+ ions was studied. The studies revealed that Pb2+ ions uptake rate was rather slow, with 75% of the total amount occurring in the first 10min for Chlorella. The optimum pH for bio-sorption...
The present study was undertaken to evaluate the feasibility of Pseudomonas alcaligenes biomass for the removal of strontium ions from aqueous solutions. Batch experiments were performed to study the adsorption of strontium on pH, Pseudomonas alcaligenes biomass adsorbent with respect to initial Sr(II) concentration, contact time and biomass dose. The experimental data were modeled by Langmuir and...
In the present study we reported the feasibility of extracellular biopolymer (PF-9) produced by Pseudomonas fluorescence C-9 as an alternative biosorbent to remove Pb(II) metallic ions from environmental and industrial wastewater.The ability of PF-9 to remove the metallic ions was investigated by using batch biosorption procedure. The effects such as, pH, biosorbent dosage, sorbate concentrations...
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...
Denitrification is one of the main objectives of water pollution control. By using heterotrophic nitrification- aerobic denitrifying bacterial strains H1 to deal with domestic sewage, the removal rate of TN and NH4+-N can reach 66.04% and 62.11% respectively. In order to achieve solid-liquid separation and recycling of strains, H1 immobilized by polyvinyl alcohol- sodium alginate, Fe3O4 nanoparticles,...
The biosorption of strontium ions on beer yeast was investigated under the different adsorption conditions. The results of this study showed that the beer yeast has some abilities to adsorb Sr(II) from solution. Different variables, such as solution pH, contact time, adsorbent dose and initial strontium ions concentration influenced the adsorptive quantity. The process of biosorption has nearly reached...
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...
In the present study we reported the feasibility of Pseudomonas fluorescens PFC02 biomass as an alternative biosorbent to remove Co(II) and Cd(II) metallic ions from environmental and industrial wastewater.The ability of PFC02 to remove the metallic ions was investigated by using batch biosorption procedure. The effects such as, pH, biosorbent dosage, sorbate concentrations and sorbate-sorbent contact...
Cement-soil samples were made from composite cement (25%), red clay (75%) and proper amount of ultra-pure water. The samples were used to treat sewage water in the experiment of anaerobic reaction and aerobic reaction respectively. The raw sewage was collected from the inflow path of a wastewater treatment plan and it mainly consisted of domestic sewage. Results showed that the effect of ion exchange...
The purpose of this work was to investigate the kinetics of the adsorption and biodegradation process in adsorption-biodegradation anaerobic sequencing batch reactor (AB-ASBR). Using the whole milk powder as substrate, the volume loading rate (VLR) of influent was 7.0kgCOD / (m3 · d) at 35°C. In order to maintain the optimal pH value, NaHCO3 was added into the influent. The experiment indicated that...
In the present study we reported the feasibility of extracellular biopolymer(PF-9) produced by Pseudomonas fluorescence C-9 as an alternative biosorbent to remove Ni(II) metallic ions from environmental and industrial wastewater. The ability of PF-9 to remove the Ni(II) ions was investigated by using batch biosorption procedure. The effects such as pH, dosage of biosorbent, Ni(II) initial concentration...
Adsorption of heavy metals ion by microorganisms is emergying technology to treat wastewater. In this study, the cadmium-resistant Pseudomonas aeruginosa E1 was investigated in absorption of cadmium ion from solution. The effects of polluted solution initial pH, biosorption time, and cadmium ion concentration and biosorbent amount on biosorption efficiency were investigated. The cadmium removal percent...
The Pb(II) biosorption characteristics of Pseudomonas fluorescens PFC02 biomass was examined as a function of initial pH, contact time and initial metal ion concentration. FTIR spectra showed that the principal functional sites taking part in the sorption process included carboxyl , hydroxyl groups and -CH3 stretching groups, the mechanism analysis showed that the chemical chelating was the main adsorption...
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...
Constructed rapid infiltration system ( CRI ) is simulated through two groups of 3 soil columns with the height of 30 cm, 55 cm and 80 cm respectively. After pretreatment, the mixed wastewater of regenerated-paper making is put into the six soil columns. There are 16 kinds of hydraulic loading cycles made of 4 kinds of flooding-drying ratios (1:6, 1:4, 1:2, 1:1) and 4 kinds of flooding time (4 h,...
Put dead immobilized saccharomyces cerevisiae biomass into column of continuous upflowing reactor. Study the influence of temperature, quantity of saccharomyces cerevisiae in column and initial Cu2+ concentration on Cu2+ adsorption. Determine optimal operating parameters of initial pH values, flow rates and quantities of saccharomyces cerevisiae in column through orthogonal experiment. Analyse adsorption...
The adsorption processes at different inflow of chemical oxygen demand (COD) were investigated, using an adsorption-biodegradation anaerobic sequencing batch reactor (AB-ASBR) operated at mesophilic temperature. Results indicated that COD removal by adsorption could reach to maximum value within 20 min, which related to the kind of substrates. With glucose as substrate, the maximum COD adsorption...
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...
Put dead immobilized beer yeast into column of continuous-upflow reactor, study adsorption characteristics on Cu2+ through axial-magnification and axial-radial-magnification tests of column and industrial wastewater treatment. The results showed: with initial Cu2+ concentration 20 mg/L, in axial- magnification test and axial-radial-magnification tests, flow rates of 35 mL/min and 100 mL/min were optimal...
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