sludge treatment Articles
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Effect of lime addition during sewage sludge treatment on characteristics of resulting SSA when it is used in cementitious materials
Final disposal of sewage sludge is important not only in terms of satisfying the regulations, but the aspect of choosing the optimal wastewater treatment technology, including the sludge treatment. In most EU countries, significant amounts of stabilized and dewatered sludge are incinerated, and sewage sludge ash (SSA) is generated as a by product. At the same time, lime is one of the commonly ...
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Viability of
Ascaris and other helminth genera non larval eggs in different conditions of temperature, lime (pH) and humidityHelminth eggs are the pathogens most resistant to inactivation during sludge and wastewater treatment. For this reason, in several regulations and the WHO guidelines for wastewater and excreta reuse for agriculture and aquaculture they are considered as indicators of the performance of the treatment process. Conditions required to inactivate helminth eggs, notably Ascaris lumbricoides, are ...
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Nutrient transfer by runoff from sewage sludge amended soil under simulated rainfall
Wastewater sludges are used in agriculture as soil amendment and fertilizer, with regard to their organic matter and nutrient content. However, availability of nitrogen and phosphorus from sludge-amended soils and their transfer in runoff may lead to eutrophication of downstream surface water. The aim of this study is to establish and compare the effect of two different sludges on these ...
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Effect of anaerobic digestion and liming on plant availability of phosphorus in iron- and aluminium-precipitated sewage sludge from primary wastewater treatment plants
More efficient plant utilisation of the phosphorus (P) in sewage sludge is required because rock phosphate is a limited resource. To meet environmental legislation thresholds for P removal from wastewater (WW), primary treatment with iron (Fe) or aluminium (Al) coagulants is effective. There is also a growing trend for WW treatment plants (WWTPs) to be coupled to a biogas process, in order to ...
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Re-agent dosing - Sodimate installs standardised equipment to meet the specifications of each plant case study
Water quality refining is the most essential step in water treatment processes. When done properly, it guarantees palatable taste characteristics suitable for drinking water. The reliability and accuracy of the processes for storing, metering, and dissolving the required re-agents are indispensible for successfully completing this final treatment. Outlined below is a case story about Viry- ...
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High efficiency odour control for sludge dryers, sludge pasteurizers and sludge stabilisation using lime and biogas treatment
Abstract This paper summarizes ERG’s experience of supplying odour control for sludge dryers, sludge pasteurizers, sludge lime stabilization and biogas treatment and indicates areas for improvement. Keywords Odour control, chemical scrubbing, carbon filters, waste water, OdorgardTM, sludge dryers, sludge pasteurizers, lime stabilization, biogas, V‐texTM. Introduction Since ...
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High efficiency odour control for wastewater treatment
Since the banning of sewage sludge disposal at sea in 1998 secondary treatment of sludge is now a vital part of waste water treatment. Initially many water companies opted for incineration, but over the last 10 years other options have been adopted such as producing stabilised sludge and pelletised dried sludge for use as fertiliser for agriculture. Currently over 62% of sludge is used in ...
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Mining, the environment and the treatment of mine effluents
The environmental impact of mining on the ecosystem, including land, water and air, has become an unavoidable reality. Guidelines and regulations have been promulgated to protect the environment throughout mining activities from start-up to site decommissioning, in particular, the occurrence of acid mine drainage (AMD), due to oxidation of sulfide mineral wastes, has become the major area of ...
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The effect of lime-dried sewage sludge on the heat-resistance of eco-cement
The treatment and disposal of sewage sludge is a growing problem for sewage treatment plants. One method of disposal is to use sewage sludge as partial replacement for raw material in cement manufacture. Although this process has been well researched, little attention has been given to the thermal properties of cement that has had sewage sludge incorporated in the manufacturing process. This ...
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Peristaltic Pumps play key role in rectifying the pH balance of mine water
After decades of uncontrolled industrial (mining) activities, water supply is under serious threat. Studies show that acid water levels in the country's mines are rising at a staggering average rate of 0.59 m/day. The water situation is in fact threatening the population’s survival. At the heart of resolving this problem are the treatment of water and wastewater. This article looks at ...
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