Sewage sludge
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Sewage sludge is the residual, semi-solid material that is produced as a by-product during sewage treatment of industrial or municipal wastewater. The term "septage" also refers to sludge from simple
Desiccation cracks in dried sludge, the hard final remains from a sewage plant
Sewage sludge in a beaker from a treatment plant
A shovel excavator loading solid sewage sludge for land application.
Biosolids
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Biosolids are solid organic matter recovered from a sewage treatment process and used as fertilizer. In the past, it was common for farmers to use animal manure to improve their soil fertility. In the
Sewage sludge
…sludge is most commonly either disposed of in landfills, dumped in the ocean, or applied to farmland for fertilizer. In the United States, the term "biosolids" is sometimes used as an alternative to "sewage sludge", particularly in conjunction with the re-use of sewage sludge as fertilizer after sewage sludge…
Pumpkin seedlings planted out on windrows of composted biosolids
Testing for human pathogens in cereal crops after the application of biosolids
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