An Advanced Biosolids Treatment Process and Potential Beneficial Applications of the Processed Biosolids

Singh, Ajay; Mosher, Frederick R.; Lugowski, Andrew; Ward, Owen P.

doi:10.2175/193864706783761293

Cited by 3 publications

(7 citation statements)

References 18 publications

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“…The Lystek MB contained no culturable E. coli, but, the ALLBAC marker was detected in both field years (Table 1). Production of Lystek involves a high heat and alkalization using a limestabilization process that aims to kill culturable cells such as E. coli (Singh et al, 2006). As expected, in both field seasons, swine manure contained the highest number of ALLBAC and culturable E. coli (P = 0.02), relative to the other MBs (Table 1).…”

Section: Resultssupporting

confidence: 59%

“…Biosolids are rich in macro-nutrients including nitrogen and phosphorus, and contain micro-nutrients including zinc, copper, iron, and molybdenum which contribute to optimum plant growth and soil health (Lu et al, 2012). However, MBs can also be nonpoint source contributors of metals, human-pathogens and xenobiotics (Singh et al, 2006). The excessive nutrient and metal loads either from improper application rates or unexpected bioconversion is a concern.…”

Section: Introductionmentioning

confidence: 99%

“…Treatment processes for MBs can be designed to eliminate many pathogens (Singh et al, 2006); however, unregulated category (CP2, or Class B) products are frequently used as a soil amendment on agriculture lands, in part because wastewater treatment plants often lack the capability to test for the presence of viruses and helminth ova and therefore cannot guarantee their absence. E. coli culture methods are inexpensive and straight-forward; however, their use as a proxy for the presence of enteric humanpathogens has been questioned based on the ubiquity of E. coli in mammals as well as long term survival in environmental matrices (Byappanahalli et al, 2006;Ishii et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Monitoring Bacteroides spp. markers, nutrients, metals and Escherichia coli in soil and leachate after land application of three types of municipal biosolids

et al. 2015

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A lysimeter-based field study was done to monitor the transfer of culturable Escherichia coli, general (ALLBAC), human (Hf183) and swine (PIG-BAC-1) specific 16S rRNA Bacteroides spp. markers, nutrients and metals through soils and leachate over time following land application of a CP1/Class A as well as two CP2/Class B municipal biosolids (MBs). Hf183 markers were detected up to six days following application in soils receiving dewatered and liquid MBs, but not in leachate, suggesting their use in source tracking is better suited for recent pollution events. The CP2/Class B biosolids and swine manure contributed the highest microbial load with E. coli loads (between 2.5 and 3.7 log CFU (100 mL)(-1)) being greater than North American concentration recommendations for safe recreational water. ALLBAC persisted in soils and leachate receiving all treatments and was detected prior to amendment application demonstrating its unsuitability for identifying the presence of fecal pollution. A significant increase in NO₃-N (for Lystek and dewatered MBs) and total-P (for dewatered and liquid MBs) in leachate was observed in plots receiving the CP1/Class A and CP2/Class B type MBs which exceeded North American guidelines, suggesting impact to surface water. Metal (As, Cd, Cr, Co, Cu, Pb, Mo, Ni, Se, Zn and Hg) transfer was negligible in soil and leachate samples receiving all treatments. This study is one of the first to examine the fate of E. coli and Bacteroides spp. markers in situ following the land application of MBs where surface runoff does not apply.

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Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Monitoring Bacteroides spp. markers, nutrients, metals and Escherichia coli in soil and leachate after land application of three types of municipal biosolids

et al. 2015

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“…The process involves the application of heat (65-70 o C), alkalization with potassium hydroxide, and high-shear mixing of dewatered sludges in a batch or semi-continuous system to achieve a high solids concentration (15-20 % by weight), pathogenfree, and nutrient-rich liquid biosolids product that meets U.S. EPA criteria for Class A biosolids to be used in agricultural land application (Singh et al, 2006). The process also reduces the viscosity of dewatered sludges from greater than 2 million centipoises (cP) to less than 4,500 cP, and renders dewatered and processed biosolids completely pumpable with conventional pumps.…”

Section: Overvew Of Lystekmentioning

confidence: 99%

“…In addition to the reduced BNR sludge yield, the integrated Lystek technology provides the following benefits (Singh et al, 2006):…”

Section: Benefits Of Lystek Sludgementioning

confidence: 99%

Biosolids Minimization Using Integrated Alkaline Sludge Hydrolysis and Biological Nutrient Removal Process

Lugowski¹,

Nakhla²,

Patel³

et al. 2007

proc water environ fed

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This paper presents a pilot-scale evaluation of an integrated approach to sludge management utilizing a combination of biological nutrient removal and biosolids alkaline hydrolysis, as well as attempts to explore the impact of recycled alkaline hydrolysates on sludge yield and anaerobic digestion. The novel concept of converting an existing conventional activated sludge (CAS) wastewater treatment plant in St. Marys, Ontario to BNR and integrating it with Lystek technology emerged to reduce sludge production and spare the plant expansion of its sludge storage facilities. In the integrated sludge management strategy, first waste activated sludge (WAS) from the BNR system is treated with Lystek technology and thereafter a portion of the Lystek-treated sludge is recycled to the BNR system and the primary digester, and the remaining sludge is pumped to storage/land application.A pilot study was undertaken to demonstrate the effectiveness of the proposed BNR system and to assess the impact of recycling Lystek-treated sludge to the BNR system and anaerobic digester. The pilot plant produced effluent comparable to that of the full-scale plant with biological nitrification/denitrification and phosphorous removal. The addition of Lystek-treated sludge did not have a detrimental effect on the pilot plant treatment efficiency. Anaerobic respirometric studies of pilot plant WAS with the addition of Lystek-treated sludge indicated increased VSS destruction, COD removal, and methane production. At a similar SRT, the pilot plant observed yield was 0.37 gTSS/gCOD, compared to 0.66 gTSS/gCOD for the full-scale system. When combined with Lystek treatment and recycle, the integrated sludge management strategy is expected to achieve an estimated 84% reduction in volumetric sludge disposed from the site.

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Impact of alkaline-hydrolyzed biosolids (Lystek) addition on the anaerobic digestibility of TWAS in lab – And full-scale anaerobic digesters

et al. 2014

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An Advanced Biosolids Treatment Process and Potential Beneficial Applications of the Processed Biosolids

Cited by 3 publications

References 18 publications

Monitoring Bacteroides spp. markers, nutrients, metals and Escherichia coli in soil and leachate after land application of three types of municipal biosolids

Monitoring Bacteroides spp. markers, nutrients, metals and Escherichia coli in soil and leachate after land application of three types of municipal biosolids

Biosolids Minimization Using Integrated Alkaline Sludge Hydrolysis and Biological Nutrient Removal Process

Impact of alkaline-hydrolyzed biosolids (Lystek) addition on the anaerobic digestibility of TWAS in lab – And full-scale anaerobic digesters

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