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With the increasing demand for energy, dwindling oil reserves and global warming, the current fossil fuel based mechanical power and electricity has caused severe environmental degradation and energy shortage. Renewable, non-polluting and biodegradable energy sources must be adopted. Producing biodiesel from algae which represents the third bio-energy feedstock appears to be the most straightforward...
Due to the severe pollution taken place in Taihu Lake, the investigation of water source quality in Taihu Lake is urgent for the development of drinking water treatment processes. Water samples taken from two water source areas in Taihu Lake were analyzed. The results showed that ammonia, TN, TP and CODMn were the dominant contaminants. The concentrations of those contaminants all exceeded “surface...
The aim of this experiment was to evaluate the effect of the floating bed technology which used Canna general is, Acorus calamus and the two plants mixed together with the technology of soil less culture for scenic water treatment. The results showed that all the plants grew well and nitrogen, phosphorous and organic pollutants were removed effectively after 60 days. The highest removal rate of TP,...
In recent years, winter water treatment plant effluent quality in Baotou is abnormal. In order to investigate the causes of affecting the water quality. After a year water quality monitored parameters of the waterworks source and combined with algae lab laboratory testing, counting. Analyzeed water quality status and the relationship between the parameters. Obtained water had been polluted. In the...
The lake-type raw water was treated in Photo-catalytic Oxidization reactor. Under the condition of the inflow discharge control in 15L/h, the padding packing compares 2/5, UV lamp 30W, added no chemicals, pH 7.35, use the electro-flotation to treat it by two groups of plates to treat the water continuously. Then investigate the removal effect of pollutants after electro-flotation/Photo-catalytic Oxidization...
The killing of Microcystis aeruginosa by strong ionization discharge was studied experimentally. The relation of aeration amount, initial content of bacterium, treatment time, PH value and temperature to the killing rate of Microcystis aeruginosa was studied. The experiment has show that in a certain degree, the killing rate of Microcystis aeruginosa was raised with the increasing of aeration amount,...
Using the BG-11 medium, the usual cultivation of alage medium, fast and efficient screen a produced organic algae from the soil around a Chemical factory's soda production work-shop in Beijing. Experiments show that after 15 days cultivating, the algae's biomass reachs to maximum; the best yield conditions of the algae in the laboratory:Na2CO3 concentration(20mg/L),lig-ht intensity(4500Lux), inoculums...
The volatile oils were extracted from Typha latifolia by Water-steam distillation. Components of the volatile oils were analyzed and identified by gas chromatograph-mass spectrometry (GC-MS), and the allelopathic effect of the volatile oils were also explored by bioassay of Microcystin aeruginosa. The results showed that the volatile oils had activity to inhibit the growth of M. aeruginosa. This study...
The extraction and purification of microcystin from microcystic aeruginosa were studied. The efficiency for microcystin extraction was assessed by comparing different polarity extraction agents. Results showed that 60% methanol has the highest efficiency. Ethanol solution could extract microcystins safely, and can be used as a massive security extraction agent. The extraction method and solid phase...
Pulsed high-voltage discharge is a new advanced oxidation water treatment technology. Plasma technology has recently become significant because it offers the advantages of lower costs, higher treatment and energy efficiencies, and the smaller space volume it occupies. The present work investigates the use of a multi-needle plate reactor with gas-liquid hybrid discharge system to sterilize ballast...
The water quality characteristics of Jinan Queshan reservoir (which derived from Yellow River) are low turbidity and algal bloom. Based on those characteristics, the flofilter technology with flotation and filtration was developed, which was conducted to dispose of the eutrophic water with the algal bloom from Queshan Reservoir. The tested result stated that the removing rate of total algae was 72...
The landscape of reclaimed water always broke out water bloom because of containing high concentrations of nitrogen and phosphorus. The TP and TN of the landscape decreased to 0.04 mg/L and 2.27 mg/L respectively with recycling ozonation at the end of the experiment. Chlorophyll a was 94.3 mg/m3 and CODCr was 45.1 mg/L. Ozonation could inactivate the algae but not destroy the cell completely. Comparing...
The excessive propagation of algae caused by eutrophication of aquatic environment in the urban source water supply is the main issues of concern to drinking water purification industry in recent years. The prediction of algae in raw water can offer time guarantee for operation of contingency caused by excessive propagation of algae which can ensure the safety of water supply. In the study, we collected...
In this paper, fuzzy logic controller (FLC) with enhanced-cGA is introduced for determining chlorine input rate in water treatment plant. Prechlorination process removes many colloids such as NH3, iron, manganese, algae and bacteria. However, this process is carried out by human's hand with their experience practically. This plant is composed of complex structures, so chlorine input rate has been...
A new process of enhanced dissolved air floatation (DAF) by pulsed high voltage discharge was studied in this paper. With high voltage discharges, removal rate of some normal water quality indexes were better improved, such as UV254 and CODMn from 0.145 to 0.142 and from 6.2 mg/L to 5.8 mg/L. The turbidity of water after treated with pulsed high voltage discharges was larger than that without discharges...
The Yellow River in China is being polluted with artificial pollution, which brings great challenges to drinking water treatment plants along the Yellow River. The conventional treatment processes could not ensure satisfactory quality of drinking water, and the innovative processes are crucial for the achievement of the newly issued drinking water standard (GB5749-2006).Ultra filtration (UF) technology...
UF (ultrafiltration) technology has been in progress as an alternative to conventional drinking water treatment of raw water which usually contains algae both in domestic and abroad. But fast decrease of membrane flux and ineffective backwashing are major limitations for application of UF on algae-rich water. Pretreatment by permanganate/PAC (powdered activated carbon)/coagulant and a better range...
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