Courtesy of Dandong Bettersize Instruments Ltd.
Laser Particle Size Analyzer
BT-Online1 Online Particle Size Analyzer is an on-line particle size monitoring system for real-time particle size monitoring and control in powder manufacturing industries. Driven by Standard Operation Procedure (SOP), it automatically samples, measures, recovers and processes data directly from the powder delivery pipeline, providing 24-hour particle size detection and control for a variety of dry powder production lines.
Measurement: Particle size
Particle size range: 0.1 to 1000µm
Dispersion type: Dry
Technology: Laser diffraction
Nanoparticle Size Analyzer Features and Benefits
Measuring range: 0.1 to 1000µm
Accuracy: ≤3% (GBRM D50)
Repeatability: ≤3% (GBRM D50)
Standard Operation Procedure (SOP)
Detector: 68 pieces
Typical interval measurement time: ≥1 min
High-performance fiber lasers with long life span
Impact of heating method on the flocculation process using thermosensitive polymer
Flocculation process based on water soluble polymers as flocculating agents is still intensively researched nowadays, despite the introduction of these materials about fifty years ago. There is a need to gain the full control of this process in order to obtain high efficiency and strictly define products. For that purpose new solutions are proposed like stimuli-responsive macromolecules. In this paper the impact of suspension heating method on the flocculation process using thermosensitive polymer is reported. In...
How well does my filter work?
Contamination control is the key to a cost-effective maintenance operation for hydraulic or engine systems. You depend on your filters, whether hydraulic, lube or fuel, to keep your fluids clean, to keep maintenance costs down, and to ensure reliable operation. At some point, you probably will ask yourself whether or not your filters are really working and doing what they were designed to do. There are different ways to answer this question. The easiest (and least reliable) way to answer the question is to...
A feasibility study of magnetic separation of magnetic nanoparticle for forward osmosis
It was recently reported that a UK company has developed a naturally non-toxic magnetoferritin to act as a draw solute for drawing water in forward osmosis process. The gist of this technology is the utilization of the magnetic nanoparticle and high-gradient magnetic separation for draw solute separation and reuse. However, any demonstration on this technology has not been reported yet. In this study, a feasibility test of magnetic separation using magnetic nanoparticle was therefore performed to investigate the...
Characteristics of different fractions of microbial flocs and their role in membrane fouling
Characteristics of different fractions (small flocs vs. large flocs) of sludge flocs from a submerged anaerobic membrane bioreactor treating thermomechanical pulping (TMP) whitewater were determined using various analytic techniques, including extraction and chemical analysis of extracellular polymeric substances (EPS), particle size analyzer, and polymer chain reaction (PCR)-denaturing gradient gel electrophoresis (DGGE). The results showed that the fraction of smaller flocs contained a higher level of bound EPS...
No-till corn after Bromegrass: Effect on soil carbon and soil aggregates
Grasslands in the Conservation Reserve Program (CRP) in the USA may be converted to grain crops for bioenergy. The effect of no-till conversion of a smooth bromegrass (Bromus inermis Leyss) grassland to no-till corn (Zea mays L.) production on soil organic carbon (SOC) in the western Corn Belt was monitored for over 6 yr. A different 13C/12C isotope signature is imparted to SOC by C4 plants including corn versus C3 plants such as bromegrass. Changes in C isotope ratios in SOC in three soil depths (0- to 5-, 5–10,...
Real-Time Measurement of Outdoor Tobacco Smoke Particles
ABSTRACT The current lack of empirical data on outdoor tobacco smoke (OTS) levels impedes OTS exposure and risk assessments. We sought to measure peak and time-averaged OTS concentrations in common outdoor settings near smokers and to explore the determinants of time-varying OTS levels, including the effects of source proximity and wind. Using five types of real-time airborne particle monitoring devices, we obtained more than 8000 min worth of continuous monitoring data, during which there were measurable OTS...
Secondary Effluent Depth Filtration Medium Capacity
ABSTRACTThe filter medium has a maximum accumulation capacity for the particulate material removed from the suspension that is being filtered. The maximum accumulation capacity (generally referred to as maximum specific deposit [MSD]) of the filter is basically an equilibrium condition, when the binding strength between the particles and the collecting medium (collecting medium can be the medium itself or the particles previously attached to the collecting medium) is equal to the shear forces exerted on the...
Critical Review Discussion -- Nanoparticles and the Environment
This paper is a discussion of the 2005 A&WMA Critical Review on nanoparticles and the environment. In the review, Drs. Pratim Biswas and Chang-Yu Wu described how nanoparticles and ultrafine particles (nominally those with diameters <100 nm) are created, interact among themselves, interact with gas molecules and larger particles, and where they end up in the environment. The authors observed that nanoparticles are created inadvertently as a portion of combustion emissions, but they are also created intentionally...
Introduction to the A&WMA 2005 Critical Review: Nanoparticles and the Environment
Untitled Document Nanoparticles are loosely defined as particles with diameters in the range of 1 nm to 50 or 100 nm (nanometers). Nanoparticles are bigger than air molecules (0.3 nm), but are smaller than the upper limits regulated by ambient air quality standards. (U.S. National Ambient Air Quality Standards regulate the mass of particles with diameters less than 2500 and 10,000 nm, PM2.5 and PM10, respectively.) Although nanoparticles do not contributelar...
Legal Lookout: Nanotechnology: EPA Considers How to Proceed
Untitled Document Nanotechnology is broadly defined to include technologies involving the control of materials and structures with nanoscale dimensions of 1 to 100 nanometers. Because the ratio of surface to total atoms increases exponentially with decreasing particle size, nanosized particles have uniquely large surface areas that offer special and very desirable properties for, among other characteristics, cleaning, wetability, appearance and delivery. Most technologies that are...
Exploring Innovative Solutions
Progress in environmental management relies on innovation. Whether it's novel applications of new technologies, pioneering public policies, or groundbreaking partnerships – innovation leads to advances. Looking toward tomorrow's advances, the theme of A&WMA's 98th Annual Conference & Exhibition is “Exploring Innovative Solutions.” The conference will take place June 21-24, 2005, at the Minneapolis Convention Center in Minneapolis, MN. As a thriving, dynamic, and increasingly diverse metropolitan area,...
Critical Review to Address Nanoparticles and Environment
For a cautionary example of the paradox of innovation, look no further than asbestos, says Pratim Biswas, Ph.D. Asbestos—because of its unmatched strength, durability, and heat resistance—was long favored by the construction industry in a wide range of uses, including insulation, ceiling tile, and spray-on fireproofing. Yet today, the most dangerous asbestos fibers, if ingested or inhaled, are known to cause cancer of the lungs, chest, and abdominal linings. And symptoms may not become evident until many years...
Effects of air pollution on emergency admissions for chronic obstructive pulmonary diseases in ...
The present paper is based on results collected from the air quality network, which was assembled for covering the Oporto metropolitan area, in Portugal. Among the SO2 and PM10 levels obtained for the last two decades, a particular unpolluted year was chosen to evaluate the health effects of concentrations lower than those that usually cause acute episodes. It was observed that even low levels of SO2 could be related with the increase of obstructive chronic pulmonary diseases morbidity daily rates recorded in...
Obtaining Dioxin values with low uncertainty using automatic long-term sampling equipment and data ...
Compost Site Comes Back From the Brink
The largest composter in the state of Washington, Cedar Grove Compost Company in Seattle, had its hands full of challenges in 1997 — confronted with a half million dollar fine, a lawsuit, and angry neighbors. With the adoption of an Environmental Management System (EMS), the compost facility has turned its precarious situation around and stayed in business, while dramatically cutting odor problems. With a generally satisfactory full year under its belt, the composter is looking forward to even better results in...
In Situ Solidification/Stabilization
Introduction Solidification/stabilization (S/S) reduces the mobility of hazardous substances and contaminants in the environment through both physical and chemical means. Unlike other remedial technologies, S/S seeks to trap or immobilize contaminants within their `host` medium (i.e., the soil, sand, and/or building materials that contain them), instead of removing them through chemical or physical treatment. Leachability testing is typically performed to measure the immobilization of contaminants. S/S techniques...
Quantification of Particle Shape and Angularity Using the Image Analyzer
The image analyzer commonly used by the powder metallurgists has been successfully employed to quantify angularity and shape characteristics of granular materials. In this paper a detailed procedure has been outlined. Results of investigation of different natural sands are presented in the form of a distribution of tangent count taken as a measure of angularity. Powers´ roundness index has been calibrated against the tangent count. Mechanical properties of different sands have been shown to be correlated with...