Abstract：
:Biowaste such as animal manure poses an environmental threat, due to among others, uncontrolled emissions of ammonia and additional hazardous gases to the atmosphere. This study presents a quantitative analysis of an alternative biowaste management approach aimed at nitrogen recovery and reduction of contamination risks. The suggested technology combines anaerobic digestion of nitrogen-rich biowaste with biofiltration of the resulting gaseous ammonia. A compost-based biofilter is used to capture the ammonia and convert it to nitrate by nitrifying microorganisms. Nitrogen mass balance was applied to quantify the system's capacity under various fowl manure-loading regimes and ammonia loading rates. The produced nitrate was recovered and its use as liquid fertilizer was evaluated with cucumber plant as a model crop. In addition, emissions of other hazardous gases (N(2)O, CH(4) and H(2)S) were monitored before and after biofiltration to evaluate the efficiency of the system for treating these gases. It was found that nitrate-rich liquid fertilizer can be continuously produced using the suggested approach, with an over 67 percentage of nitrogen recovery, under an ammonia loading rate of up to 40 g NH(3) per cubic meter biofilter per hour. Complete elimination of NH(3), H(2)S, CH(4) and N(2)O was achieved, demonstrating the potential of the suggested technology for mitigating emission of these gases from fowl manure. Moreover, the quality of the recovered fertilizer was demonstrated by higher yield performance of cucumber plant compared with control plants treated with a commonly applied organic liquid fertilizer.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Posmanik R,Nejidat A,Bar-Sinay B,Gross Adoi
10.1016/j.jenvman.2012.12.049subject
Has Abstractpub_date
2013-03-15 00:00:00pages
172-9eissn
0301-4797issn
1095-8630pii
S0301-4797(13)00019-4journal_volume
117pub_type
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