biosolids land application Articles
-
Fate of flame retardants and the antimicrobial agent triclosan in planted and unplanted biosolid‐amended soils
A comprehensive understanding of the fate of contaminant‐laden biosolids is needed to fully evaluate the environmental impacts of biosolids land application. This study examined the fate of several flame retardants and triclosan in biosolid‐amended soil in a 90‐day greenhouse experiment. Objectives included evaluating the persistence of these compounds in soil, their phytoaccumulation ...
-
A combined reed bed/freezing bed technology for septage treatment and reuse in cold climate regions
A combined reed bed-freezing bed (RB-FB) technology was effective at treating septage under Canadian climatic conditions over a 5-year period with average loading rates of 82–104 kg TS/m2/y. Varying hydraulic and solid loading rates as well as the increasing sludge cake with time had little to no effect on treatment efficiency, with almost complete removal of organic matter, solids, heavy ...
-
Estimated occupational risk from Bioaerosols generated during land application of class B biosolids
Some speculate that bioaerosols from land application of biosolids pose occupational risks, but few studies have assessed aerosolization of microorganisms from biosolids or estimated occupational risks of infection. This study investigated levels of microorganisms in air immediately downwind of land application operations and estimated occupational risks from aerosolized microorganisms. In all, ...
-
Biogeochemical response of a northeastern forest ecosystem to biosolids amendments
Received for publication September 22, 2007. In the northeastern United States interest in the use of biosolids on forest lands is growing due to the prevalence of extensive forests and market incentives for waste disposal, yet much of the regulatory framework for biosolids land application is based on agronomic practice. This study evaluated the response of soils in a young (~20 yr old) ...
-
Fate of biosolids trace metals in a dryland wheat agroecosystem
Biosolids land application for beneficial reuse applies varying amounts of trace metals to soils. Measuring plant-available or total soil metals is typically performed to ensure environmental protection, but these techniques do not quantify which soil phases play important roles in terms of metal release or attenuation. This study assessed the distribution of Cd, Cr, Cu, Mo, Ni, Pb, and Zn ...
-
A new solids technology train: can 70% volatile solids reduction and class a biosolids be achieved from digestion?
There has been an increase in interest amongst utilities to develop solids technology concept trains that result in solids volume reduction for land application. For example, the Water Environment Research Foundation has recently initiation the OWSO “optimization” program in part to develop concepts that reduce sludge volumes for beneficial reuse or disposal. Another concept that has ...
-
Nitrogen, phosphorus, and bacteria tile and groundwater quality following direct injection of dewatered municipal biosolids into soil
Received for publication February 14, 2008. Application of municipal biosolids (sewage) to agricultural land is a common practice to improve soil physical quality and fertility. The chosen method of land application can have a strong impact on the extent of adjacent water contamination by nutrients and bacteria. Dewatered municipal biosolids (DMB) were applied to silt-clay loam experimental field ...
-
Human health risk assessment of triclosan in land‐applied biosolids
Triclosan (TCS; 5‐chloro‐2‐[2,4‐dichlorophenoxy]‐phenol) is an antimicrobial agent found in a variety of pharmaceutical and personal care products. Numerous studies have examined the occurrence and environmental fate of TCS in wastewater, biosolids, biosolids‐amended soils, and plants and organisms exposed to biosolids‐amended soils. TCS has a propensity to adhere to organic carbon in ...
-
10 tips for journalists covering biosolids
For 20 years, I've worked with reporters and journalists on their coverage of biosolids and related topics. I'm speaking here of professionals who write fact-based news or feature articles, not those who write opinion-based pieces or columns that reflect and include their personal bias and/or advocacy. What these reporters and journalists do is important, serving as conduits of useful ...
-
Philadelphia Recycling Center case study
The Challenge An arm of the City of Philadelphia Water Department, the Biosolids Recycling Center (BRC) was in need of critical support. Consisting of a dewatering complex and a compost operation that utilized a portion of the dewatered biosolids (with the balance transported offsite for disposal), the BRC had an expired Title V air management operating permit and was at risk of regulatory ...
-
Preliminary evaluation of biosolids characteristics for anaerobic membrane reactors treating municipal wastewaters
This study assessed the characteristics of biosolids of a pilot-scale anaerobic membrane bioreactor (AnMBR) treating municipal wastewater. The production of total solids (TS) and volatile solids (VS) was comparable to that reported for the extended aeration system at solids residence time (SRT) longer than 40 days. The yields of TS and VS were reduced as SRT increased from 40 to 100 days and ...
-
Phosphorus runoff from wastewater treatment biosolids and poultry litter applied to agricultural soils
Received for publication March 19, 2009. Differences in the properties of organic phosphorus (P) sources, particularly those that undergo treatment to reduce soluble P, can affect soil P solubility and P transport in surface runoff. This 2-yr field study investigated soil P solubility and runoff P losses from two agricultural soils in the Mid-Atlantic region after land application of biosolids ...
-
Long-term effects of land application of class B biosolids on the soil microbial populations, pathogens, and activity
Received for publication August 7, 2009. This study evaluated the influence of 20 annual land applications of Class B biosolids on the soil microbial community. The potential benefits and hazards of land application were evaluated by analysis of surface soil samples collected following the 20th land application of biosolids. The study was initiated in 1986 at the University of Arizona Marana ...
-
Soil carbon sequestration resulting from long-term application of biosolids for land reclamation
Investigations on the impact of application of biosolids for land reclamation on C sequestration in soil were conducted at Fulton County, Illinois, where 41 fields (3.6–66 ha) received biosolids at a cumulative loading rate from 455 to 1654 dry Mg ha–1 for 8 to 23 yr in rotation from 1972 to 2004. The fields were cropped with corn, wheat, and sorghum and also with soybean and grass or fallowed. ...
-
Fluidized Bed Biosolids Disposal Gasification Case Study
Summary: In 2007, the Sanford, Florida, Utility Department sought to identify an onsite biosolids management and disposal system that could be integrated within their South Sanford Water Treatment Facility. The intended biogasification system would be a cost effective long–term solution, that is regulatory compliant and environmentally ...
-
Optimizing removal of estrogenic compounds in biosolids: a comparison of anaerobic, post-aerobic, and cambi digestion
ABSTRACT Anaerobic digestion is a key treatment step during wastewater treatment because it is often the final significant solids treatment process prior to land application. Land application of biosolids is a vital practice for sustainable waste management; therefore, the presence of estrogenic compounds in biosolids is one concern to this practice. Three digestion processes were studied to ...
-
Aerzen USA, Albertville WWTP - Case Study
Segment: Environmental engineering Problem: WWTP uses fuel boilers Solution: AERZEN Biogas packages Results: Reduces operating cost by using biogas solution Background Albertville, Ala., is a small city on Sand Mountain, a 26-squaremile plateau in the northeast corner of the state. The Municipal Utilities Board (MUB) of Albertville operates the MUB Waste Water Treatment Plant (WWTP), an 11.5 ...
-
Persistence of estrogenic activity in soils following land application of biosolids
Estrogenic compounds may enter the environment when biosolids are applied to land. In the present study, soil samples were collected over 4 mo from a field trial following addition of biosolids. The recombinant yeast estrogen screen bioassay identified estrogenic activity in the soil at all sampling times to concentrations up to 2.3 µg 17β‐estradiol equivalency/kg. The present results indicate ...
-
Economic assessment of sludge handling and environmental impact of sludge treatment in a reed bed system
The effect on the environment of the establishment and operation of a sludge treatment reed bed system (STRB) is quite limited compared to mechanical sludge dewatering, with its accompanying use of energy and chemicals. The assessment presented here of the investment, operation and maintenance costs of a typical STRB, and of the related environmental impact, is based on the experiences gained ...
-
Influence of soil properties and soil leaching on the toxicity of ionic silver to plants
Silver (Ag) has been shown to exhibit antimicrobial properties and as a result it is being increasingly used in a wide range of consumer products. Due to these uses, there is an increased likelihood that Ag may enter the environment, predominately via land application of biosolids or irrigation with treated wastewater effluent. The aim of this study was to investigate the toxicity of Ag to two ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you