What alternatives are available then?
Both gasification and pyrolysis are improving by leaps and bounds as good "green" alternatives to land application. For more on these please see:
Scientific American - The Future of Sewage is Power and Profits
http://www.cbc.ca/news/canada/calgary/plasma-gasification-alberta-proposal-1.3373979
Kore and EWS are emerging as the pyrolysis players in the North America market -
https://www.morningstar.com/news/business-wire/BWIPREM_20151118005133/kore-infrastructure-wins-american-water-summit-2015-tech-idol-with-biosolidstoenergy-solution.html( http://www.ewscanada.com/news.html )
Emergent Waste Solutions, Advanced Pyrolysis System - https://vimeo.com/95563860 -
An Austrian System - making biochar fertilizer with Sludge - http://www.greenlife.co.at/uploads/2/3/2/5/23252088/greenlife_pyrolysis.pdf
GLES - Waste to Energy by pyrolysis - http://www.glescorp.com/en/
Great new technology - https://www.youtube.com/watch?v=-RAXTxLeR-A
Japan is making energy with their Sewer Sludge - http://www.japanfs.org/en/news/archives/news_id035504.html
Toronto ponders making energy from sludge - http://torontoist.com/2016/03/public-works-turning-our-waste-from-flushable-to-fuel/
BBC NEWS - Poop into Profit
Dealing with sewage the Swiss way - sustainable and clean
(I will be posting more here in the near future as this is such an important concern)
