A novel and low cost coal separation process: Combination of deep screening classification and gravity separation

2020 ◽  
Vol 367 ◽  
pp. 568-575 ◽  
Author(s):  
Enhui Zhou ◽  
Guanghui Yan ◽  
Xingyuan Weng ◽  
Zhenxing Zhang ◽  
Pengfei Zhao ◽  
...  
Keyword(s):  
Low Cost ◽  
Separation Process ◽  
Gravity Separation ◽  
Process Combination

Combined Aerated Ponds and Chemical Clarification in the Treatment of Petrochemical Wastewater

1993 ◽  
Vol 27 (7-8) ◽  
pp. 79-88 ◽  
Author(s):  
N. Galil ◽  
M. Rebhun
Keyword(s):  
Activated Sludge ◽  
Capital Investment ◽  
Cooling System ◽  
Low Cost ◽  
Oil Refinery ◽  
Soluble Form ◽  
Petrochemical Wastewater ◽  
Hydraulic Residence Time ◽  
Primary Stage ◽  
Process Combination

Biotreatment of wastewater from an integrated oil refinery by activated sludge and by RBC was studied and reported by the authors in previous publications. The objective of this study is to develop a low cost process combination by utilizing facilities, which exist in most industries, as treatment means as well as recipient for the renovated effluent. The idea is to share the task of the bioprocess between: a) a partial primary stage biotreatment by two aeration ponds (AP); b) chemical clarification of the primary stage effluent for removal of MLSS and colloids synthesized in the first process, by utilizing the existing lime clarification-softening system; c) completion of the bioprocess by a recircuiated cooling system (RCS) which has a high bio-oxidation capacity and also reuses the clarified effluent as make-up. The paper analyzes experimental data obtained from a pilot plant including two aerated tanks in series with a total hydraulic residence time of 2 days, followed by a lime clarifier. The main characteristic of the AP process is that hydraulic and sludge residence times are identical; two days are considered as very short SRT, especially in petrochemical wastewater, while in activated sludge SRT is usually above 15 days. The AP removed 60% of the COD - 15% by stripping - and 80% of the BOD; the oil removal was up to 50%. The chemical lime clarification improved the AP effluent reduction; suspended solids from 160 to 8 mg/l; oil from 34 to 9 mg/l; total COD from 290 to 170 mg/l. The study includes data on volumes and characteristics of the chemical sludge produced. The organic matter residual from previous treatment stages, most of it in soluble form, will be biodegraded in the RCS. The characteristics of RCS working as biological reactor were studied by Rebhun et al. and reported elsewhere. This study emphasizes economy in capital investment and beneficial reuse of industrial wastewater. The combined system includes two biological barries, AP and RCS, combined with the chemical clarification barrier, providing a reliable and low cost process combination.

Experimental Research on Beneficiation Process for a Specularite Ore

2011 ◽  
Vol 304 ◽  
pp. 387-390 ◽  
Author(s):  
Wei Zhi Wang ◽  
Jin Rui Zhang ◽  
Chun Guang Yang
Keyword(s):  
Magnetic Separation ◽  
Experimental Research ◽  
High Intensity ◽  
Iron Ore ◽  
Separation Process ◽  
Gravity Separation ◽  
Clay Material ◽  
Reverse Flotation ◽  
Test Results ◽  
Iron Concentrate

An iron ore contains specularite and hematite which are its main iron minerals. And its main gangue minerals are specularite, part of the clay material and a small amount of quartz.Tests are made on the ore by adopting processes including gravity separation, high intensity magnetic separation, high intensity magnetic-gravity separation and high intensity magnetic - reverse flotation. The test results show that the separation process of high intensity magnetic-reverse flotation can obtain an iron concentrate grading about 66.62% at a recovery of 58.38％ from an iron ore assaying around 35.00% iron, rather good metallurgical performances.

scholarly journals New Blood Level Measurement System in Blood Separating Machine

2014 ◽  
Vol 18 (2) ◽  
pp. 75
Author(s):  
Miloš Petković ◽  
Miroslav Božić ◽  
Dragiša Popović ◽  
Darko Todorović ◽  
Goran S. Đorđević
Keyword(s):  
System Integration ◽  
Detection System ◽  
Low Cost ◽  
Separation Process ◽  
Level Measurement ◽  
Custom Made ◽  
Web Camera ◽  
Color Sensors ◽  
Usb Camera ◽  
Processing Solution

Standard versions of blood separators typically usemedium-price color sensors for a detection of a boundary levelbetween red blood cells and plasma, at the last gate – at hoseclamps. Discrete number of sensors is related to a number ofsignificant levels to be detected thus making blood separationpotentially faulty and unreliable. Our target was to makeflexible, low cost replacement for level detection system that canbe easily integrated into the existing product. We came up withan image processing solution that uses USB web-camera, ARMbased off-the-shelf board – BeagleBone black and free OpenCVlibrary. Flexibility is held in much higher, selectable number oflevels, freely positioned USB camera and brand-free independentprocessing platform, as well as semi-automatic calibrationsystem. By adding minimum additional electronics, we managedto integrate our solution into existing Blood processing machine.In conclusion, we added a new value to the machine at lower costin production, increasing measurement frequency and resolutionneeded for improvement of blood separation process. Next step isto try to use two USB cameras on a custom-made board, forsimultaneous level detection on two-channel blood separator,bringing the system integration to the higher level.

scholarly journals Study of coupling photocatalysis and membrane separation using tubular ceramic membrane made from natural Moroccan clay and phosphate

2020 ◽  
Vol 150 ◽  
pp. 01007
Author(s):  
Noureddine El Baraka ◽  
Abdellatif Laknifli ◽  
Nabil Saffaj ◽  
Mourad Addich ◽  
Abdelaziz Ait Taleb ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Membrane Filtration ◽  
Ceramic Membrane ◽  
Membrane Separation ◽  
Low Cost ◽  
Elimination Rate ◽  
Separation Process ◽  
Photocatalytic Reaction ◽  
Photocatalytic Reactor ◽  
Microfiltration Membranes

This paper is devoted to study the feasibility of combining photocatalytic degradation with membrane filtration for the removal of organic pollutants. As a result, we have successfully prepared low-cost microfiltration membranes based on clay and phosphate. It is expected that the phosphate and clay composite membrane can have multifunctional separation and photocatalysis simultaneously and this type of composite membrane can play an important role in the photocatalytic reaction in presence of TiO2 and the separation process. We then tested the efficiency of the direct coupling of photodegradation and filtration to determine the rate of release of TiO2 particles through the microfiltration membrane. However, we have seen that the recovery of TiO2 exceeds a 96%, as well as the removal of products from the photodecomposition of the reaction mixture in the membrane photocatalytic reactor. In our case the methylene blue elimination rate exceeds 75%.

Comparison of Combination of Flotation-Magnetic-Gravity Separation Process with Bluk Flotation for Recovering Fine Tin Slime

2014 ◽  
Vol 1010-1012 ◽  
pp. 1598-1602
Author(s):  
Run Zhi Huang ◽  
Lin Yuan Yang ◽  
Zhong Qin Tang
Keyword(s):  
Comparative Analysis ◽  
Electric Power ◽  
Separation Process ◽  
Gravity Separation ◽  
Processing Plant ◽  
Production Index ◽  
Stable Production ◽  
Floatation Process ◽  
Easy Operation ◽  
Small Consumption

A comparative analysis of the combination of flotation-magnetic -gravity separation with bulk-floatation process for recovering fine tin slime was carried out in a mineral processing plant. Compared to the bulk floatation process, the flotation-magnetic-gravity separation process resulted in a higher recovery of tin and showed advantages of small consumption of reagents and electric power, stable production index and easy operation.

Sign in / Sign up

Export Citation Format

Share Document