Comments by "Nigel Johnson" (@nigeljohnson9820) on "Meet the farm in Italy making car fuel from cow poo" video.

  1. It is not only cow waste that should be processed, every day humans produce significant waste, all of which contains valuable chemicals. Currently this waste is disposed of in a very wasteful fashion, sometimes with significant damage to the environment. Worse still, these valuable chemicals that are thrown away, are replaced by the same chemicals that are very expensively synthesized by the chemical industry, using lots of expensive energy. We are talking about nitrates, ammonia, phosphates, and hydrogen among others. What is required is better management of such waste to maximise Useful chemical recovery and minimise the release of potential toxic waste to the environment. There was a time when urine was a national resource, key to the manufacture of gun powder. It is certainly better to recover nitrates and phosphates from waste, to use as farm fertiliser, than allow the chemical industry to manufacture these vital chemicals from the atmosphere, or minerals.
    1
  2.  @estebancorral5151  it may be the most important, but it lack commercial value. To give it the value it deserves, it needs regulations that make sewage discharges in to rivers, seas and Ocean very expensive. Apparently there are shortages of agricultural fertiliser and CO2 used to stun animals. All are manufacture from raw chemicals, consuming large amounts of energy. The use of CO2 is questionable anyway, as it is a cruel gas to use, Nitrogen would be better, as most animals lack the nerves to detect it, unlike CO2. The problem is that most countries lack the infrastructure to separate sewage, from rain water runoff.
    1