Abstract:
:Three geo-textile filtration tubes were used to dewater lagoon solids from a first stage dairy lagoon using chemical amendments (aluminum sulfate and a polymer) to enhance the separation process. This experiment had previously been done without chemical amendment. The chemical amendments speeded the dewatering process so that filling could be accomplished sooner, and also increased the removal rate of nutrients, especially phosphorus into the solid phase. Chemically amended slurry was pumped from the lagoon into the tube with the filtered liquid seeping from the tube and returning to the lagoon. Each tube was filled five to six times at 2-5-day intervals, and then allowed to dewater for 2 weeks before sampling the solid fraction in the tube. Separation efficiency improved from 79% to 99% for phosphorous and from 92% to 100% for organic nitrogen with chemical amendment. Time required for dewatering was significantly reduced by chemical amendment. Cost for the tube was approximately $10/m(3) of recovered solids with no chemical amendment and cost including the chemicals was approximately $14/m(3) of recovered solids.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Worley JW,Bass TM,Vendrell PFdoi
10.1016/j.biortech.2007.08.080subject
Has Abstractpub_date
2008-07-01 00:00:00pages
4451-9issue
10eissn
0960-8524issn
1873-2976pii
S0960-8524(07)00734-1journal_volume
99pub_type
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