In the field of oil drilling waste management, biodegradation has become one of the most favorable solutions among oil drilling companies at home and abroad due to its less expenses and the good environmental benefits it can achieve. However, different drilling environments mean applications of biodegradation vary.
Biodegradation
Biological drilling waste treatment describes degradation and mineralization of pollutants in drilling waste by bacteria growth, reproduction and internal respiration introduction of degrading bacteria and nutrients with the introduction of degrading bacteria and nutrients. It also takes advantage of biological characteristics in practical operations such as, liquid/solid separation by means of bios and degradation by means of adding microbial flocculant.
However, the practicality of biodegradation must be taken in to consideration based on the local environmental conditions before formally deciding upon this treatment approach. "Indigenous" microorganisms, nutrition factors, humidity, hydraulic detention time, PH value, dissolved oxygen should all be factored into consideration before the implementation of biodegradation.
“Indigenous” microorganisms are intrinsic microorganisms in drilling waste which do not need introduction and is comparatively economical, but is not effective in treatment. Nutrition factors play an important role in biological growth and metabolism. Therefore, drilling waste treatment needs appropriate addition of nutrition factors. Humidity is vital for biological growth and reproduction, but certainly of no significance for drilling fluids containing large amount of water. However, temperature should be kept under control. Minimized temperature is 15 degrees centigrade and the best is 30 degrees centigrade in drilling fluids treatment. Besides, for field operation of waste management, heating and insulation measures are needed for Winter and Spring and heating and cooling for Summer and Autumn. Hydraulic detention time defines how long treated wastewater stays in bioreactor. Organic pollutants in waste drilling fluids are, to a great extent, synthetic organic macromolecules which has a larger degradation rate than the other organic pollutants in wastewater, so the chosen bacteria should have better sludge loading ability. Above all, PH value and oxygen content of drilling fluids are also important factors and basic conditions for microorganisms to survive in drilling waste.
At present, the international waste treatment primarily adopts such approaches as land cultivation method, composting method, bioreactor, microbial flocculants method, anaerobic bio-treatment method, aerobic bio-treatment method, natural treatment method(oxidation pond).
The drilling waste management equipment produced by KOSUN contain Hi-G Dryer, Screw Pump, Screw Conveyer, Vertical Centrifuge. In this aspect, KOSUN can be called professional drilling waste management equipment supplier.
Drilling waste management
By dint of resource sharing and integration of international oil equipment manufacturers and engineering services providers, KOSUN has built close strategic cooperation with foreign well-known drilling fluid engineering services providers and drilling waste management providers to jointly discuss and develop integrated services, including drilling waste management, drilling fluid supply, drilling fluid additives, oil chemicals, and to provide the most reliable products and the top quality services for oilfields all over the world.
Meanwhile, KOSUN is the only enterprise manufacturing centrifuge in northwest China. Its core products include: drilling solids control equipment such as shale shaker, decanter centrifuge, desander, desilter, vacuum degasser, sand pump, agitator and mud tank, and horizontal centrifuge and disc centrifuge with a large length-diameter ratio, at a high rotating speed and in full automatic control and used in environmental protection, chemical industry, fruit juice and some other industries.
