sludge mixing Articles

  • Case study - California vineyard improves sludge movement with aeration

    Overview A California vineyard was faced with the challenge of meeting wastewater treatmentcompliance under a tight deadline defined by local regulators, while receiving ongoingodor complaints from the community. Challenges Extended periods of mismanagement from previous owners left the facility and the wastewater treatment system in disarray. ...

  • Seven Ways Your Facility Isn’t Meeting Effluent Regulations and How to Solve Them

    Whether you own, operate, or help manage a municipal or industrial facility that deals with wastewater, it’s important to understand how wastewater treatment can play a significant role in the overall health of your business, especially when it comes to meeting effluent regulations. This is an important part of the wastewater treatment process to consider, as ignoring it could earn your ...


    By SAMCO Technologies, Inc.

  • Chopper Pumps: Saeby fish processing plant, sludge tank mixing and pumping

    The sludge is coming from the dewatering unit, includes polymers, and has a dry matter content of 15 %. A Landia dry installed pump type MPTKR-I 18,5 kW pump was installed. The pump mixes the tank contents through a recirculation system and pumps the sludge to a tanker truck. The pump was built with a special feeder propeller to make sure it could handle the high dry matter content. The ...


    By Landia

  • Insitu mixing of dry and slurried reagents in soil and sludge using shallow soil mixing

    Introduction Recent implementation for the Federal Hazardous Waste Land Disposal Restrictions (LDR) to RCRA and USEPA's willingness to approve on-site treatment and/or containment has allowed in situ treatment methods to become viable options in site remediation. Shallow Soil Mixing (SSM) is one of several in situ mixing techniques now commercially available for use in on-site treatment of ...


    By Geo-Con, Inc.

  • Automatic characterisation of primary, secondary and mixed sludge inflow in terms of the mathematical generalised sludge digester model

    This paper presents the characterisation procedure of different types of sludge generated in a wastewater treatment plant to be reproduced in a mathematical model of the sludge digestion process. The automatic calibration method used is based on an optimisation problem and uses a set of mathematical equations related to the a priori knowledge of the sludge composition, the experimental ...


    By IWA Publishing

  • Mixed MSW composting in transition

    WITHOUT a doubt, composting the mixed municipal solid waste stream is a “niche” business. It is an MSW management option that seems to be viable in very specific situations. In some instances, these plants were built to service tourist destinations, often in somewhat rural areas where recycling is difficult and landfills are distant. In several other cases, public agencies built plants to extend ...


    By BioCycle Magazine

  • New processes for the improvement of sludge digestion and sludge dewatering

    INTRODUCTIONThe examination of numerous sewage sludges from municipal wastewater treatment plants leads to the conclusion that on the one hand dewaterability of these sludges worsens and that on the other hand dewaterability of sludges becomes more and more important due to increasing disposal costs. Especially wastewater treatment plants with inflows from the food processing industry often face ...


    By Cambi AS

  • Influence of Fe(II) addition on heavy metal bioleaching from sewage sludge with mixed inocula

    The indigenous mixed inocula were cultured and enriched from the thickened waste sewage sludge for heavy metal bioleaching. The mixed inocula were then used for bioleaching, and 2 g/L sulphur was added. The influences of FeSO4?7H2O dosage on heavy metals (Zn, Cu, Pb and Cd) and nutrients (nitrogen and phosphorus) bioleaching were investigated. Results show that the addition of FeSO4?7H2O ...


    By Inderscience Publishers

  • Differences in soluble COD and ammonium when applying ultrasound to primary, secondary and mixed sludge

    Ultrasound treatment is often applied to enhance the anaerobic digestion of sludge. Optimal conditions for organic matter solubilisation of primary, secondary and mixed sludge were assessed by implementing ultrasound disruption at different specific energies (from 3,500 to 21,000 kJ/kgTS). The variation in soluble chemical oxygen demand (sCOD) and ammonium nitrogen (NH4+-N) was ...


    By IWA Publishing

  • Treatment of mixed municipal and winery wastewaters in a conventional activated sludge process: a case study

    ABSTRACTThe possibility of co-treating municipal and winery wastewaters in a conventional activated sludge process was studied at full scale. The wastewater treatment plant considered in this paper operated an extended-oxidation process during vintage (four month per year) and a pre-denitrification/oxidation process during the rest of the year. The experimentation showed that good performances, ...


    By IWA Publishing

  • Differences in soluble COD and ammonium when applying inverted phase fermentation to primary, secondary and mixed sludge

    Primary, secondary and mixed sludge were treated by inverted phase fermentation. This treatment results in solid–liquid separation of sludge after endogenous enzymatic hydrolysis (anaerobic conditions: 42°C, 48 hours). The soluble chemical oxygen demand (sCOD) was increased in the solid phase up to 1,800%, 21,300% and 260% in primary, secondary and mixed sludge, respectively. The corresponding ...


    By IWA Publishing

  • Nutrient removal from activated sludge mixed liquor by wastewater protozoa in a laboratory scale batch reactor

    The aim of the study was to investigate the nutrient removal rate of three wastewater protozoan isolates. The study was carried out in a laboratory-scale batch reactor for a period of 120 h. in a four batch study. Aliquot samples were withdrawn from the reactor every 24 h. for the analysis of phosphate, nitrate, nitrite, ...

  • Denitrification and Floating Sludge

    What is Denitrification? Denitrification is the conversion of soluble nitrate to nitrogen gas in the nitrogen cycle. For denitrification to occur, three factors are needed: Presence of Nitrate Anoxic conditions (no free dissolved oxygen) A carbon source (soluble BOD) Floating Sludge Denitrification is useful and ...

  • Industrial Sludge Treatment

    Industrial Sludge Wastewater Treatment Industrial Sludge Treatment Facility Oxygen Mixing Injection Dissolved Oxygen Boosted with Liquid Oxygen to Improve ...


    By Integrated Engineers Inc.

  • Industrial Sludge Wastewater Treatment

    Industrial Sludge Wastewater Treatment Industrial Sludge Treatment Facility Oxygen Mixing Injection Dissolved Oxygen Boosted with Liquid Oxygen to Improve Bacteriological ...


    By Integrated Engineers Inc.

  • The effect of mixing conditions on anaerobic digester performance

    The basic principle of aerobic wastewater treatment is the conversion of some parts of organic matters to biomass and this causes production of excessive sludge in aerobic processes. This excessive sludge is withdrawn from time to time to prevent accumulation of biomass in aeration basin. In most cases, this sludge requires the stabilization before the dewatering and disposal. Different processes ...


    By ORBIT e.V.

  • Sludge reduction performance focus: Lagoon sludge case study

    In-Pipe Technology Pipe Technology® Company, Inc., Company, Inc., Company, Inc., is an effective, environmentally is an effective, environmentally is an effective, environmentally-friendly, and fiscally friendly, and fiscally responsible method to reduce accumulated lagoon solids. By reducing accumulated sludge volumes by 40% to 85%, In- volumes by 40% to 85%, In-Pipe Technology has helped ...

  • Remediation of Oil Refinery Sludge Basin

    Abstract Work was completed in early 1992 to clean up a 5.5 acre (2.2 ha) stormwater sludge basin for an oil refinery company. The basin, which had served as a stormwater collection and settling pond for over 40 years, contained oily sludges with high concentrations of certain metals and volatile organic compounds. The closure plan included a combination cement-bentonite slurry wall and jet ...


    By Geo-Con, Inc.

  • Simulation of sludge dewatering on belt filters

    A mathematical model for belt filters was developed to determine optimum load rate and belt speed during drainage of flocculated biological sludge. Numerical simulations were performed for belt filters with and without plows, and the model fit experimental data well. Experiments showed that highly compressible cakes were formed during drainage, which was important. Due to cake compression, the ...


    By IWA Publishing

  • H2 consumption by anaerobic non-methanogenic mixed cultures

    The impact of H2 consumption, by homoacetogens, on the overall hydrogen yield in mixed culture fermentation is the focus of this study. Batch reactors were used to test the ability of anaerobic digested sludge, heat treated to eliminate methanogens, to produce and consume molecular hydrogen. The measured average hydrogen production rate from 4.2 g glucose/L was 44 ± 4 mmol H2/L sludge · d, while ...


    By IWA Publishing

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