Types of treatments


  • Anaerobic digestion: is a collection of processes by which microorganisms break down biodegradable material in the absence of oxygen.
    Anaerobic digestion is widely used as a source of renewable energy. The process produces a biogas, consisting of methane, carbon dioxide and traces of other ‘contaminant’ gases. Read more


Why in 4ento, we rather let it breathe?
We believe the arguments for it applications are being win-over by nature most basic, endless, renewable, abundant, environmentally friendly and FREE , solar energy, wind power & wave energy.


  • Biodegradation
  • Composting
  • Incineration
  • Landfill
  • Landfill mining
  • Mechanical biological treatment
  • Mechanical sorting
  • Open dump
  • Photodegradation
  • Recycling
  • Resource recovery
  • Sewage treatment
  • Waste collection
  • Waste picking
  • Waste sorting
  • Waste trade
  • Waste treatment
  • Waste-to-energy


All others all very bad and Illegal dumping !! so please don’t.



Types of Waste


  • Biodegradable waste: includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things using composting, aerobic digestion, anaerobic digestion or similar processes. Read more.


  • Food waste: is food that is discarded or lost uneaten. The causes of food waste or loss are numerous, and occur at the stages of production, processing, retailing and consumption. Read more


Why we, at 4ento, chose Insects?
Conversion of organic waste into high NUTRITIONAL biomass opens new economic opportunities for municipalities and small entrepreneurs in the Management of some municipal solid waste sector.


  • Green waste: also called agricultural waste is biodegradable waste that can be composed of garden or park waste, such as grass or flower cuttings and hedge trimmings, as well as domestic and commercial food waste.


  • Heat waste: is the heat, by necessity, produced both by machines that do work and in other processes that use energy, for example in a refrigerator warming the room air or a combustion engine releasing heat into the environment. Read more


Why we choose to pay attention to this kind of waste for insects?
Instead of being “wasted” by release into the ambient /environment, sometimes waste heat can be utilised by another process, or a portion of heat that would otherwise be wasted can be reused in the same process if make-up heat is added to a system.


  • Open defecation: is the practice of people defecating outside and not into a designated toilet. The term is widely used in literature about water, sanitation, and hygiene (WASH) issues in developing countries. Read more.


  • Industrial FARM waste (chicken, pig, cow’s manure / THEN Slaughterhouses waste). This waste is generally taken care of in a couple of ways: dispose of waste is lagoons or spray the wastewater as irrigation over fields, both very bad ideas because they contaminate surface and groundwater, causing terrible smells, contributing to greenhouse gases and negatively impact the soil. Read more (Beyond the Factory Farm.)


 expressed perBOD (kg)SS (kg)NKj-N (kg)P (kg)
Red meat slaughterhouseston LWK55.60.680.05
Red meat packinghouseston LWK119.60.840.33
Poultry slaughterhouseston LWK6.83.5n.a.n.a.
Tannerieston raw hide100200n.a.n.a.
Dairies (consumption milk)ton milk4.20.5<0.1<0.02

PLEASE, Reduce, Reuse & Recycle



  • Fate of pharmaceuticals and pesticides in fly larvae composting
    Science of The Total Environment. Volume 565, 15 September 2016, Pages 279–286Abstract: A novel and efficient organic waste management strategy currently gaining great attention is fly larvae composting. High resource recovery efficiency can be achieved in this closed-looped system, but pharmaceuticals and pesticides in waste could potentially accumulate in every loop of the treatment system and spread to the environment.



  • Environmental labels and declarations
    This ISO brochure gives a concise and clear introduction to the ISO 14020 series of standards dealing with different aspects of environmental labels and declarations. It will help both manufacturers and consumer representatives understand how a simple set of rules and guidelines can ensure that environment claims made on products or labels can be trusted.

List of waste types