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An innovative system of supercritical water oxidation with a transpiring wall reactor was designed and constructed. Temperature fields inside the reactor, the contents of gas effluent, total organic carbon (TOC) removal efficiency and energy utilization efficiency of supercritical water oxidation of glucose were investigated at different feed flow rates. Higher reaction temperature, longer useful...
Due to the difficulty of oilfield produced water treatment and low efficiency of coagulation technology. A more efficient treatment technology was necessity. Produced water treatment by ozone enhanced coagulation was investigated in this study in order to develop a new method for oilfield produced water treatment. The results showed that addition of ozone could reduce the dosage of coagulant (PAC)...
In the pilot scale test, three kinds of typical natural solid phase materials, such as cotton, anthracite and walnut shells, were used as biological denitrification carbon sources in the remediation of nitrite contaminated groundwater. The results indicated that when the influent concentration of nitrate was about 30mg/L, the nitrate removal of the reactors with cotton and walnut shells as carbon...
Conventional drinking water treatment plant consists of coagulation, flocculation, sedimentation, and filtration and disinfection units. Depending on water quality influent, each unit can be optimized to achieve the desired water quality effluent, both in design and operation stages. A typical water treatment plant has the combination of processes needed to treat the contaminants in the source water...
Palm oil agricultural and industry activities generate a great amount of by product, known as palm oil mills effluent (POME). The treatment conducted using membrane bioreactor has successfully removed the heavy organic component of POME but the water that remains still contain colour as its by product. This paper proposed the use of a simple silent discharge ozonizer in colour removal of treated palm...
This paper introduces technology and application on treating gasification effluent of fertilizer with Physical-chemistry and biochemistry united technology. The technology is simple and viable, and has less land occupied. When main equipments run normally, the gasification effluent of fertilizer treated with the united technology reaches second-degree discharge standard of `Discharge Standard of Water...
Dissolved organic matters in organic-polluted raw water and their potential to from disinfection by-products during drinking water treatment raise great challenges to the traditional water treatment process. Although many pre-treatment and post-treatment methods have been widely studied to improve the water quality of tap water, these methods are more or less constrained by the public finance or the...
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...
Methyl tert-butyl ether (MTBE) is a common additive for producing a clean burning fuel with a higher Octane number and less emissions. Batch adsorptive capacity, continuous flow breakthrough and biological activated carbon (BAC) treatment experiments were conducted to compare the adsorptive capacities of four activated carbons for MTBE, to obtain the adsorptive capacity indicators useful for predicting...
One of China largest river, Songhua River was polluted due to the explosion at a PetroChina factory in Jilin province in 2005. A full scale test was carried out to investigate the removal of nitrobenzene in the raw water from polluted Songhua River. The removal and control effects of nitrobenzene by using Powered Activated Carbon (PAC) absorption and Granular Activated Carbon (GAC) filtration as emergent...
Batch adsorption equilibrium experiments and continuous flow breakthrough experiments were conducted to compare the effectiveness of 7 granular activated carbons (GACs) in removing trichloroethylene (TCE) from groundwater. The order of GACs' adsorptive capacities for TCE was in the same order of their phenol numbers (indicator for internal surface of <;1 nm micropores). A small amount of methanol...
Polyaluminium chloride (PAC) was adopted as coagulant to treat the high algae-laden water containing lots of cells of Microcysits aeruginosa (MA) by jar test of cogulation/flocculation/dissovled air flotation (C/F/DAF) process. The constant flocculation and the tapered flocculation with two steps were used in C/F stage. Two-dimension fractal dimension (D2) and strength factor (SF) were respectively...
The disinfection effect of Copepod of zooplankton with chlorine dioxide was compared with that of chlorine. The experimental results showed that chlorine dioxide was more effective to kill Copepod. Copepod was completely killed by 1.0mg/L of chlorine dioxide for contacting 30 min but the required dosage were about 2.0mg/L of liquid chlorine. The body structure variety of Copepod indicated that the...
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 hexagonal-hole grid flocculation system is very efficient to deal with high turbidity water of 850 NTU and the color of 2300 PCU. The best conditions are determined through adjusting grid arrangements, concentration and dosage of flocculating agent. When the water velocity of flow is 100 L/h, the grid 2, 1, 3 module order is the best one. The water turbidity decreased to 19.5 NTU and color to...
Groundwater recharge using reclaimed wastewater has emerged as an integral part of water and wastewater management in arid regions of the world. This study investigated the fate of dissolved organic matter (DOM) through laboratory-scale soil aquifer treatment (SAT) for a year. During maturation period, reductions in dissolved organic carbon (DOC), absorbance of ultraviolet light at 254 nm (UV254)...
Simultaneous biological phosphorous and nitrogen removal was investigated in an anaerobic/anoxic sequencing batch reactor (A/A SBR) enriched with denitrifying phosphorous removing bacteria (DPB) sludge. The lab-scale experiments were conducted under the conditions of various SRTs (14d, 60d, and 34d), COD concentrations (200 mg/L, 400 mg/L, and 600 mg/L), and nitrate concentrations (60, 80, 100 mg/L)...
This article describes the design and construction of a refitted hydraulic press used for water hyacinth dewatering. The performance under different pressures of the press was investigated. The press system mainly composed five parts: support frame, round press plates, cylindrical sieve vessel, collection bucket and hydraulic power system. When the pressure increased from 10 MPa to 35 MPa, the residues...
Phosphorus is one of the key elements necessary for the growth of microorganism in drinking water. It stimulates the growth and/or regrowth of microorganism and reduced biostability in drinking water. The demand for effective and inexpensive technology is to increase in response to the widespread recognition of the deleterious health effects of microorganism risk in pipe network. In this study, activated...
In the present article, the treatment of groundwater containing Fe(II) has been investigated. The oxidation processes were mediated by specific bacteria, namely the Leptothrix ochracea and Gallionella ferruginea, which belong to the general category of iron oxidizing bacteria. This work was focused on the characterization of the products of biological oxidation and to the examination of the kinetics...
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