sludge composting Articles
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Sludge composting, sludge pretreatment and radiation technology: a review
The paper reviews the state-of-the-art technologies on sludge conditioning and stabilisation. Radiation technology, best contextualised within the concept of Green Chemistry, is yet another developing area of sludge pretreatment. Besides revisiting some important aspects of sludge treatment by composting, this review paper also appraises the application of gamma ray and ultrasound irradiations ...
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A study on Air Filled Porosity evolution in sludge composting
Air Filled Porosity (AFP) is a key parameter in the composting process, conditioning oxygen availability and heat accumulation. Air pycnometry is considered the most adequate methodology for AFP determination. This technique requires withdrawing a sample of material from the composting mass for AFP measurement, which may alter its physical characteristics. A novel strategy that permits to measure ...
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Pilot project cuts odor, cost for humanure compost
Utah Valley Daily Herald Article on the benifits on using micro-pore membrane compost covers when composting highly odorus material. In February of 2009 Utah Valley's North Sewer Distirict conducted a pilot study to determine the effectivness of mirco-pore membrane compost covers in reducing odors from biosolids (sewage sludge) composting. Odor testing was conducted over a term of one month ...
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Effect of composting on sludge contaminated with heavy metals from three different tannery streams and their bioavailability to plants
This research was conducted to study the influence of composting on tannery sludge contaminated by Cr, Cd, Zn, Cu, and Ni. Composting of sludge streams was performed in three different piles for 60 days. The results showed that the total concentration of heavy metals was increased with composting, except in the TT-3 sample where the concentrations of Cd, Cu, and Ni did not increase. The ...
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The use of sewage sludge compost for improving reedbeds performance
In a wastewater of medium strength, about 75 % of the suspended solids and 40 % of the filterable solids are organic in nature. The parameter used for measuring the strength and the quantity of the organic substances in the wastewater is the Chemical Oxygen Demand (COD) (Aggelakis and Tchobanoglous, 1995; Tchobanoglous and Burton, 1991). Degradable organic matter in wastewater, whether soluble ...
By ORBIT e.V.
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Cattail plants’ Biomass as a bulking agent in sewage Sludge composting and the effect of the produced Compost on cattail plants’ Growth
In every Greek island there is at least one town with more than 20,000 inhabitants. Several smaller towns and villages range from a few hundreds to a few thousands in population. Usually in the larger towns there are sewage treatment facilities providing at least secondary treatment of wastewater. In most cases the effluent produced is drained to the sea and the sludge is dumped in landfills. In ...
By ORBIT e.V.
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Fertilization of pinus pinea L. seedlings with a sewage sludge-based compost
Two experiments were conducted to evaluate the effect of a sewage sludge-based compost (SSC) on the growth and mineral composition of containerized Pinus pinea L. seedlings. In the first experiment, five different substrates were tested: four binary mixtures of SSC and peat (100% SSC, 75% SSC, 50% SSC and 25% SSC, by volume) without fertilization, and a control substrate (peat-based substrate + ...
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Kinetic study of compost liquor nitrification
This study is a first kinetic approach about the compost liquor treatment by activated sludge. This industrial wastewater is highly loaded in organic and nitrogen compounds (COD≈12,000 mg L−1 and NH4+-N≈4,000 mg L−1). The possibility of its treatment in an urban WWTP is studied measuring ammonia oxidation rate with non-acclimated sludge to the industrial effluent. Compost liquor appears as an ...
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Allu Transformer Screener Crusher Aerating Compost - Case Study
Material Wet sludge Industry Aerating, Composting, Crushing, Mixing, Screening Application Aerating Function Aerating, Composting, Crushing, Screening, Mixing Model ALLLU Transformer DS 4-23 screener crusher with XHD60 blades PROBLEM Wet, lumpy contaminated sludge material was causing delays to the composting process of a Swedish company. SOLUTION The material was ...
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CA waste facility eliminates odor complaints for their organic green waste and sludge composting operation
The Problem - The large California facility takes in a great deal of green waste (grass clippings, vegetable & fruit waste, leaves and other vegetation) and food processing sludge. It is all combined and recycled into high grade mulch and compost in their site composting operation. The nature of the waste and the composting process leads to the release of high concentrations of odor - ...
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Agricultural Use of Different Residual Waste Composts - Current Situation and Experiences in France
ABSTRACT Quality standards have been recently established in France for sewage sludge composts and other urban composts (greenwaste, biowaste and municipal solid waste composts). These standards allow to guarantee the innocuousness of the composts. Other standards have been defined in order to predict the compost effects on soil properties: the index of biological stability (ISB), based on ...
By ORBIT e.V.
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Chemical and physical properties of rice straw waste and hospital sewage sludge in turned windrow aeration system
In this paper, we present the main goal of optimum quality ratio of co-composting with rice straw waste and hospital sewage sludge. The experiments were designed by varying the initial C/N ratio and moisture content in the range of 25-45 and 30-70% w/w., respectively. The results clearly showed that the losses of Kjeldahl-N increased when the amounts of sludge in the mixtures were increased. The ...
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Potential utilisation of pulp and paper mill biosolids in composting and plant production: a case study at St. Marys Papers Ltd. (Canada)
The use of St Marys Paper biosolids as a soil additive or growth cover was investigated. Biosolids were mixed with a commercial potting media in five vol/vol ratios and employed in a greenhouse study. The biosolids were found to improve Pinus banksiana seedling growth, a 50% biosolids:50% ProMix mixture yielding the tallest plants and highest dry mass. To further biologically stabilise the ...
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CE licensed organic fertilizer pellet making device
The organic fertilizer pellet making device is made use of to granulate numerous natural materials after fermentation. Before granulation, the raw products do not require to be dried and grated, and spherical granules can be processed directly with ingredients, which can save a lot of energy. The organic fertilizer pellet making maker is made up of a reducer, a coupling, an electrical motor, a ...
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Compost maturity as expressed by phytotoxicity and Volatile organic acids
VOA in Composts Maturity is a qualitative trait of compost that may be expressed in a number of ways and is generally held to be relevant to plant performance. Volatile organic acids (VOA) have been cited to be responsible for phytotoxicity (plant growth suppression) when immature compost is used for growing plants (Manios et al., 1989). However, the production of VOA in compost has not been ...
By ORBIT e.V.
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