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In order to save operating costs of sewage treatment plant, the SBR process was investigated with low DO condition by means of real-time control. when the reaction temperature was 21±0.5, aeration rate was 30 L/h, the pH, DO and ORP probe were monitored online and the real-time control strategy has been set up. The results showed that the variation of DO increased slowly in the first 145 minutes and...
This Adsorption and ion exchange is thought to be an effective method. Zeolite is a kind of normal adsorber. The adsorption capacity of natural zeolite is low, so it must be activated in order to attain a higher adsorption capacity. On this condition, a study on modification of natural zeolite and its defluorination ability was carried out. In modification experiment the best modification method was...
In modification experiment the best modification method was established. First, natural zeolite was roasted at 600?? in a muffle furnace for 2h. After cooled to normal temperature, it was soaked in 4% HCl solution on dynamic condition at 65?? for 1 hour, then soaked in 1mol/L NaOH solution on dynamic condition at 40?? for 1 hour. The preconditioned zeolite was then was soaked in 10%AlCl3 solution...
Based on the practical engineering and aimed at the food wastewater, a series experiments were conducted to investigate parameter on the effluents qualities by submerged membrane bioreactor (SMBR). A better removal performance in a SMBR could be achieved to treat food wastewater. The removal efficiencies in MBR were obtained worked with HRT at 10 h, DO at 2.5 mg/L and pH at 7.8, respectively. During...
Chironomus kiiensis larvae which cannot be exterminated by conventional disinfection process propagates prolifically in eutrophic water body, and it therefore turns to be a potential problem encountered in drinking water quality. In this paper, the quantitative experimental studies were carried out on inactivation of the fourth instar larvae of Chironomus kiiensis in the raw water using oxidants,...
Chironomus kiiensis larvae which cannot be exterminated by conventional disinfection process propagates prolifically in eutrophic water body, and it therefore turns to be a potential problem encountered in drinking water quality. In this paper, comparative experiments on the inactivation of the fourth instar larvae of Chironomus kiiensis in distilled water by chlorine, ozone and chlorine were conducted...
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