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©2020 Copyright. Sludge Separation, Hydrocarbio Recovery and Waste Volume Reduction to Improve Environmental Impact

Petroleum Waste Degradation & Digestion

Bio-Remediation can be traditionally performed when finding suitable natural environments in which to deposit the waste to be digested by indigenous bacterial cultures. 

 

"(a) bioaugmentation, in which known oil-degrading bacteria are added to supplement the existing microbial population, and (b) biostimulation, in which the growth of indigenous oil degraders is stimulated by the addition of nutrients or other growth-limiting cosubstrates." 

This meant finding bacteria to digest oil living naturally in the environment and then evaluating if that environment will be suitable for an active level of digestion by the bacteria.

lemar digester design for hydrocarbon waste degradation

Bioremediation in Oil and Gas

Bacteria are the most active agents in petroleum degradation (Khanafer et al. 2017). To treat petroleum waste, bioremediation is used over long periods of time to degrade hydrocarbons. Used in pits and open spill areas this method may also use forms of mixing, aerating and turning in situ to increase the surface contact time with the desired bacteria. This process is highly inefficient nor predictable as the bacteria environment is constantly changing reducing processing ability, reliability and life cycle of the hydrocarbon digesting bacteria (Johnson et al 2018). A contained environment promotes bacteria continuous and optimal processing metabolism (Nilanjana and Chandran 2011).

Indigenous Bacteria 

Open ground waste management digestion is usually seasonally when temperatures are right. Some territories have constant temperatures and can find workable bacteria groups. In other cases useful bacteria cultures don't tolerate new environments or they adopt a different metabolism in response to those changes. 

Kuwait Crude degradation fields
 

With stricter environmental laws and compliance, operators are moving away from continuing to use this method of digestion which involves creating bacteria remediation conditions in open grounds.

 

When the waste can't go towards the bacteria then the bacteria can come to you.

Environmental Management

Finding and maintaining a suitable digestion and reproduction environment for the bacteria allows to standardize and predict the continuous processing behavior of the waste. Keeping the bacteria happy and thriving is a big part of the equation.

 

BIOREM-L specialized bacterial cultures are used to effectively to treat wastes including surfactants, petrochemicals, Polymer, hydrocarbons, fats, oil and greases (FOG), BOD5 and sludges. The successful degradation of these wastes is through bacterial activity and the production of enzymes including proteases, lipases, amylases, ureases, celluases, and/or reductases.  Our bacterial products are used in processing high strength organic and solids contained in oil sludge.

Proposed Digester Configuration: DG200

Proprietary Digester Design with Ultrasonic Transducer Sludge Activator have 2 stages in one Environmentally Controled Host Complex

 

Stage 1 – high speed sludge activation and particle reduction.

Stage 2 – coalescer type full biological agitation & processing.

Stage 3 – can be added for more methane production

 

Our digesters can be configured for Aerobic or Anaerobic Degradation.

Aerobic

The biologicals, will provide rapid and complete digestion hydrocarbons, metals like: zinc, iron and oxidize other metals, process phosphorus and calcium through secondary aerobic process and turns the nitrogen into oxygen, nitrogen gasses and ammonia gasses creating a bacteria friendly environment for enhanced BOD reduction and ammonia conversion enabling the ammonia and nitrogen to dissipate into the atmosphere; therefore, the time involved in solids degradation is greatly reduced (Khanafer et al. 2017).

This leaves behind sulfide gases (responsible for crop burn). Using the aerobic method, this will decrease the chance of surface water runoff contamination due to BOD, nitrogen compounds and other constituents that the EPA regularly monitors.

 

Anaerobic

Anaerobic Digestion in a biogas plant is the process in which bacteria break down organic materials in the absence of oxygen. Two products are produced: biogas and digestate. Biogas is a valuable source of renewable energy, while digestate is rich in nutrients and can be used as a fertilizer (Wang et al. 2016). The benefits of anaerobic digestion include:

  • Lower Fossil Fuel Use

  • Lower GHG emissions

  • Produces valuable biogas and fertilizer

  • Closes the Production Cycle.

In comparison with others (weeks and months), our biologicals retention:

Mobile Unit DG200 processing rate for oil sludge from oil spills and waste pits with pro-active digester is around 1 to 2 hrs/m3

Our process main advantage is short retention time combined with the promotion of optimal bacteria metabolism, while decreasing particle size of the waste using activation technologies. This allows to guarantee the process of detoxifying contaminated waste to environmental discharge requirements.

Combined Bacteria Use

Our bacterial products are used in processing high strength organic and solids contained in oil sludge. Digester can use a mix of many bacteria typesBacteria will digest hydrocarbons, PAHs, metals like: zinc, iron and oxidize other metals like copper, mercury, process phosphorous and calcium through secondary aerobic process and turns the nitrogen into oxygen, nitrogen gasses and ammonia gasses creating a bacteria friendly environment for enhanced BOD reduction and ammonia conversion enabling the ammonia and nitrogen to dissipate into the atmosphere; therefore, the time involved in solids degradation is greatly reduced.


This leaves behind sulfide gases (responsible for crop burn). Using the BIOREM-L in aerobic method, this will decrease the chance of surface water runoff contamination due to BOD, nitrogen compounds and other constituents that the EPA regularly monitors.

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lemar digester design for hydrocarbon waste degradation