Electro-Osmotic Chemical Treatment of Marine Clayey Soil Using CaCl2 Solution

2018 ◽  
pp. 36-48
Author(s):  
Lei Zhang ◽  
Liping Jing ◽  
Ningwei Wang ◽  
Chen Fang ◽  
Zhendong Shan ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Clayey Soil ◽  
Cacl2 Solution

RESULTS OF RESEARCH OF MODERN TECHNOLOGIES OF WEED CONTROL IN INDUSTRIAL CROPS OF CORN FOR GRAIN

2020 ◽  
Author(s):  
O.N. Negreba ◽  
◽  
E.V. Bondarenko ◽  
M.A. Belik ◽  
T.A. Yurina ◽  
...  
Keyword(s):  
Weed Control ◽  
Chemical Treatment ◽  
Mechanical Treatment ◽  
Plant Protection ◽  
Protection System ◽  
Plant Protection System ◽  
Modern Technologies ◽  
Basic Version

The article presents the results of research on modern technologies for weed control in production crops of corn for grain. The best results were obtained in the basic version of technology No. 5 with the following plant protection system: mechanical treatment of crops (cross-row harrowing and three row-to-row cultivation) in combination with chemical treatment with the herbicide Mаister-150 g/ha.

Alkaline Activation of Clayey Soil Using Potassium Hydroxide & Fly Ash

2018 ◽  
Vol 10 (9) ◽  
Author(s):  
Ahmed Elkhebu ◽  
◽  
Adnan Zainorabidin ◽  
Ismail Hj. Bakar ◽  
Bujang B. K. Huat ◽  
...  
Keyword(s):  
Fly Ash ◽  
Potassium Hydroxide ◽  
Clayey Soil ◽  
Alkaline Activation

Use of ultrasonic surface hardening in modifi cation of surface layer

2020 ◽  
pp. 200-204
Author(s):  
Yu.S. Semenova ◽  
A.G. Samul’ ◽  
S.V. Mazhuga
Keyword(s):  
Surface Layer ◽  
Chemical Treatment ◽  
Surface Hardening ◽  
Manufacturing Cost ◽  
Ultrasonic Vibrations ◽  
Surface Microrelief ◽  
Scientific Schools ◽  
Structure Changes ◽  
Wide Range ◽  
Finishing Machining

Overview of the research results got by various scientific schools in the field of application of ultrasonic surface hardening is provided. Wide range of opportunities of ultrasonic surface hardening is shown for the application in the preliminary machining of surfaces before thermal and chemical treatment, coating, and also as finishing machining. The effect of the energy of ultrasonic vibrations on structure changes in the material of the surface layer and on surface microrelief on parts performance is considered. The prospects of using of the ultrasonic surface hardening method in combination with other methods of the material modification are presented. In addition the possibilities of reducing the manufacturing cost of product by introducing ultrasonic surface hardening into the technological process are shown.

Effect of Chemical Treatment with Citric Acid or Ozonated Water on Microbial Growth and Polyphenoloxidase Activity in Lettuce and Cabbage

2004 ◽  
Vol 9 (2) ◽  
pp. 121-125 ◽  
Author(s):  
Hyoung-Jun Youm ◽  
Jae-Won Jang ◽  
Kyu-Ri Kim ◽  
Hyo--Jjung Kim ◽  
Eun-Hee Jeon ◽  
...  
Keyword(s):  
Citric Acid ◽  
Chemical Treatment ◽  
Microbial Growth ◽  
Ozonated Water

Improvement in the Engineering Properties of Clayey Soil Using Sodium Chloride

2020 ◽  
Author(s):  
Harpinder Pal Singh ◽  
Jaspreet Singh Chana ◽  
Gurpreet Singh ◽  
Hardev Singh ◽  
Manvir Singh
Keyword(s):  
Sodium Chloride ◽  
Clayey Soil ◽  
Engineering Properties

Performance Stability of Small Biological Chemical Treatment Plants

1990 ◽  
Vol 22 (3-4) ◽  
pp. 275-282
Author(s):  
R. Storhaug
Keyword(s):  
Activated Sludge ◽  
Chemical Treatment ◽  
Chemical Precipitation ◽  
Poor Quality ◽  
Precipitation Process ◽  
Chemical Plants ◽  
Effluent Standards ◽  
Main Portion ◽  
Rotating Biological Contactors ◽  
Number Of Treatment

Biological and chemical treatment plants constitute a main portion of the overall number of treatment plants in Norway. The biological and chemical plants are divided into three process groups, simultaneous precipitation and activated sludge, combined precipitation and rotating biological contactors (RBC) and post precipitation and activated sludge. Aluminium sulphate or ferric chloride are the commonly used flocculants in the chemical precipitation process. Effluent data from 174 Norwegian biological chemical treatment plants are evaluated. Compared to the effluent standards for each process group, post precipitation shows the best performance. On an average these plants have the lowest actual utilization of the design capacity. The most important factors that cause the treatment plants not to meet the effluent standards are, poor quality of the sewer system, improper design of the plant and organizational problems. Satisfactory separation of particles, flow equalization and proper operational management, are the basic demands to achieve low effluent concentrations for tot-P and BOD7.

Use in Agriculture of Sludge from Chemical Treatment of Sewage

1987 ◽  
Vol 19 (8) ◽  
pp. 139-145
Author(s):  
G. Castillo ◽  
A. Ortega
Keyword(s):  
Sodium Hydroxide ◽  
Chemical Treatment ◽  
Application Rate ◽  
Additional Treatment ◽  
Fecal Coliforms ◽  
Aluminium Sulfate ◽  
Leguminous Crops ◽  
Dried Sludge ◽  
Chemical Sludge ◽  
Sludge Application

The reutilization in agriculture of the sludge produced in the chemical treatment of sewage is investigated. Aluminium sulfate (50 mg/l) and sodium hydroxide (50 and 200 mg/l) are added to domestic sewage allowing it to settle and eliminating floating materials. Three kinds of raw chemical sludge are digested and dried. Their sanitary quality is determined by two bacterial indicators (total and fecal coliforms) and one viral indicator (E. coli bacteriophage) and the fertilizing capability of digested and dry sludge by sowing leguminous crops (Phaseolus spp ) in soil with 11 tons/ha sludge application rate. Digested and dried sludge from conventional treatment in equal conditions to those of chemical sludge is used as reference. Sanitary quality results show that raw and digested chemical sludge are not recommended for use in agriculture due to their high microbiological contamination. Dry sludge could be considered for this purpose due to its low fecal organisms content. However the development of leguminous crops in soil with dry aluminium sludge application shows no seed germination. The results of leguminous growth in digested sludge of sodium hydroxide (200 mg/l) justify an additional treatment to adequate its sanitary quality for use in agriculture.

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