Min Kho Articles | Environmental XPRT

Ball mill operation

This Ball mill is made up of feeding part ,discharging part, gyre part, transmission part(decelerator, small transmission gear, generator, electrical control )and so on .The hollow axis adopts the cast steel and the rotary big gear is processed from cast rolling gear .The barrel body wears well and bears wearable scale board. And compared with the traditional ball mill, the motor power of ...

Nov. 21, 2011

By Shanghai MIN

Crusher and milling machine in stone processing industry

Stone processing mainly includes crushing and grinding. Both methods are used to reduce the size of or powder industrial rocks and minerals by crushers or grinding machines, which are called Stone processing machines and equipments. After processing, the stone or rock can apply in construction, building, highway and some chemical industries. Crusher is to make bigger stone (30mm~1000mm) smaller ...

Nov. 6, 2009

By Shanghai MIN

Small jaw crusher overview

A small Jaw Crusher is one of the main types of primary crushers in a mine or ore processing plant. This series of jaw crusher can reach the crushing ratio of 4-6 and the shape of final product is even. Jaw crusher is widely applied to crush high hardness, mid hardness and soft rocks and ores such as slags, construction materials, marble, etc. The pressure resistance strength is under 200Mpa, ...

Nov. 21, 2011

By Shanghai MIN

Photodegradation of sulfonamide antimicrobial compounds (sulfadiazine, sulfamethizole, sulfamethoxazole and sulfathiazole) in various UV/oxidant systems

This study used Na2S2O8, NaBrO8 and H2O2 to degrade sulfadiazine (SDZ), sulfamethizole (SFZ), sulfamethoxazole (SMX) and sulfathiazole (STZ) under ultraviolet (UV) irradiation. The initial concentration of sulfonamide and oxidant in all experiments was 20 mg/L and 5 mM, respectively. The degradation rate for sulfonamides satisfies pseudo-first-order kinetics in all UV/oxidant systems. The ...

Feb. 26, 2015

By IWA Publishing

70-min amino acid analysis of physiological samples

Pickering Laboratories specializes in the manufacturing of cation-exchange columns and eluants for amino acid analysis. Post-column derivatization with Ninhydrin offers unmatched selectivity and reproducibility of the analysis for most challenging matrixes. Pinnacle PCX post-column derivatization system allows analysts to combine eluant gradient capabilities of modern HPLC instruments with ...

Jun. 10, 2010

By Pickering Laboratories, Inc.

Research on the infiltration processes of lawn soils of the Babao River in the Qilian Mountain

Using a Guelph Permeameter, the soil water infiltration processes were analyzed in the Babao River of the Qilian Mountain in China. The results showed that the average soil initial infiltration and the steady infiltration rates in the upstream reaches of the Babao River are 1.93 and 0.99 cm/min, whereas those of the middle area are 0.48 cm/min and 0.21 cm/min, respectively. The infiltration ...

Aug. 13, 2014

By IWA Publishing

Characterization of char from slow pyrolysis of sewage sludge

The effects of final pyrolysis temperature Tend from 300 ºC to 550 ºC, heating rates β of 2 ºC/min, 3 ºC/min and 5 ºC/min, retention time RT from 45 min to 90 min, and the moisture content MC from 0 to 70% on characteristics of the pyrolysis char from sewage sludge were investigated using a tube furnace in this study. The resulting chars were characterized by sorption of nitrogen (surface ...

Feb. 16, 2016

By IWA Publishing

Monitoring of petroleum hydrocarbon degradative potential of indigenous microorganisms in ozonated soil

This study was performed to investigate the petroleum hydrocarbon (PH) degradative potential of indigenous microorganisms in ozonated soil to better develop combined pre-ozonation/bioremediation technology. Diesel-contaminated soils were ozonated for 0–900min. PH and microbial concentrations in the soils decreased with increased ozonation time. The greatest reduction of total PH (TPH, 47.6%) and ...

Feb. 1, 2005

By Springer-Verlag GmbH

Optimization of aeration conditions in the hybrid process of coagulation-ultrafiltration with air sparging

To optimize the aeration conditions in the hybrid process of coagulation-ultrafiltration with air sparging, a series of air flow rates under continuous and intermittent sparging were investigated. The water quality characteristics that surrounded membranes, bubble characteristics, fouling resistances, and energy consumption under different aeration conditions were analyzed. The results showed ...

Oct. 19, 2017

By IWA Publishing

Ultrasonic irradiation of activated industrial sludge

Sludge is a by-product of wastewater treatment and contains multitude of pollutants. In the present study, irradiation with ultrasound as treatment technique was carried out to treat complex effluent paper sludge, sugar sludge and sewage sludge samples from different industrial places. Wastewater samples were treated in ultrasonic bath at 25 kHz for different time periods of 5 min, 10 min, 20 min ...

Oct. 11, 2010

By Inderscience Publishers

Comprehensive analysis of tobacco smoke using TD–GC×GC–TOF MS with Tandem Ionisation

The hazardous constituents of cigarette smoke have attracted considerable attention lately, especially with increasing regulation around the world limiting or banning smoking in public places – and even in private cars if children are present. From an analytical perspective, however, there is much that remains to be learnt about the composition of cigarette smoke, because of its high ...

Jul. 29, 2016

By SepSolve Analytical

Ammonia and phenol removal in an internal-circulate sequencing batch airlift reactor

An internal-circulate sequencing batch airlift reactor (IC-SBAR) has been developed to evaluate the efficiency of phenol and ammonia removal in treating synthetic wastewater. This study examined the effect of operation cycle on this system. Results showed that above 97.0% removal efficiencies of ammonia and phenol were achieved, which indicated that ammonia and phenol removals were not ...

Jun. 29, 2015

By IWA Publishing

Quasi–min–max dynamic output feedback MPC for LPV systems

This paper presents a dynamic output feedback model predictive control (MPC) scheme for linear parameter varying (LPV) systems based on quasi–min–max scheme. At each time instant, an optimal control sequence is computed by minimising the upper bound of an infinite horizon quadratic objective function subject to input constraints using linear matrix inequalities (LMIs). A sufficient condition is ...

Mar. 10, 2014

By Inderscience Publishers

Evaluation of dynamic membrane formation and filtration models at constant pressure in a combined coagulation/dynamic membrane process in treating polluted river water

In this study, a dynamic membrane (DM) was formed by flocs produced by river water pollutants reacting with polyaluminum chloride (PAC). The DM was used to separate the flocs from the mixed liquor at constant pressure. Two support media for the DM were tested: non-woven fabric filter and dacron mesh. The formation time of the DM was determined according to the critical flux. The formation ...

Apr. 3, 2013

By IWA Publishing

Response surface methodology approach for the optimisation of adsorption of hydrolysed polyacrylamide from polymer-flooding wastewater onto steel slag: a good option of waste mitigation

Wastewater produced from polymer flooding in oil production features high viscosity and chemical oxygen demand because of the residue of high-concentration polymer hydrolysed polyacrylamide (HPAM). In this study, steel slag, a waste from steel manufacturing, was studied as a low-cost adsorbent for HPAM in wastewater. Optimisation of HPAM adsorption by steel slag was performed with a central ...

Apr. 26, 2017

By IWA Publishing

Bioremoval of colour from textile wastewater by sequencing batch reactor and biotechnological methods

In experimental studies, single growth white rot fungi Phanerochaete chrysosporium has been additionally used to obtain the decolourisation capacity of fungal biomass. It has been shown that average efficiency of classical activated sludge in SBR reaches 71% during 1600 mins for 436, 525 and 620 nm absorbance. It has been shown that average efficiency of advanced activated sludge in SBR reaches ...

Jun. 23, 2009

By Inderscience Publishers

Evaluating photo-degradation of COD and TOC in petroleum refinery wastewater by using TiO2/ZnO photo-catalyst

The aim of this study is to investigate the performance of combined solar photo-catalyst of titanium oxide/zinc oxide (TiO2/ZnO) with aeration processes to treat petroleum wastewater. Central composite design with response surface methodology was used to evaluate the relationships between operating variables for TiO2 dosage, ZnO dosage, air flow, pH, and reaction time to identify the optimum ...

Jun. 27, 2016

By IWA Publishing

Monitoring and control of a partially packed biological aerated filter (BAF) reactor for improving nitrogen removal efficiency

This paper examines on-off systems and automatic monitoring and control of a biological aerated filter to identify the end point of nitrification and denitrification processes, and chemical oxygen demand (COD), ammonia-nitrogen removal (NH3-N) and aeration savings. Oxidation-reduction potential (ORP), pH and dissolved oxygen (DO) were measured on-line and chemical parameters were measured in the ...

Sep. 1, 2011

By IWA Publishing

Enhancement of anaerobic biohydrogen/methane production from cellulose using heat-treated activated sludge

Anaerobic digestion is an effective technology to convert cellulosic wastes to methane and hydrogen. Heat-treatment is a well known method to inhibit hydrogen-consuming bacteria in using anaerobic mixed cultures for seeding. This study aims to investigate the effects of heat-treatment temperature and time on activated sludge for fermentative hydrogen production from α-cellulose by response ...

Jan. 1, 2011

By IWA Publishing

The treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process

This paper investigates the treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process (ECP). The effects of operating parameters such as electrode material, current density (2.5–40 A/m2), operating time (0–60 min), initial pH (5–12) and electrode connection mode (monopolar parallel (MP-P), monopolar series and bipolar series) on the ECP were ...

Nov. 29, 2013

By IWA Publishing