digester agitator Articles

  • Installation of Radar Level Instruments in Anaerobic Digesters

    ABSTRACTThere are numerous well-proven options available for level determination instrumentation. Instrumenting treatment processes present some unique challenges. Some of these include the ability for wastewater or residuals to clog and blind instruments. Level determination in an anaerobic digester presents these problems as well as others including foaming, surface agitation, and operation in ...

  • Effect of agitation on the performance of an anaerobic sequencing batch biofilm reactor in the treatment of dairy effluents

    Agitation rate is an important parameter in the operation of Anaerobic Sequencing Biofilm Batch Reactors (ASBBRs), and a proper agitation rate guarantees good mixing, improves mass transfer, and enhances the solubility of the particulate organic matter. Dairy effluents have a high amount of particulate organic matter, and their anaerobic digestion presents inhibitory intermediates (e.g., ...


    By IWA Publishing

  • Homogenous mixing for shortening of composting processes - Case Study

    Various treatment processes are used today for manufacturing compost, of which two are of particular interest in terms of mixing and treatment technology. They are open composting and container composting. In both cases e.g. sewage sludge (wet and dry), chopped paper, loppings, green waste, and sawdust are pre-mixed with the possible addition of small amounts of active substances. The task of ...


    By AVA - Huep GmbH u. Co. KG

  • Fre-energy 250m3 DIY Installed Biogas Storage

    Following the installation in 2011 of our 250m3 biogas holder at Much Fawley Farm near Hereford, Fre-energy decided to purchase a second Base Biogas Holder for use with their own Anaerobic Digester located at Lodge Farm near Wrexham, which just happens to be the largest organic farm in Wales. Their unique AD tank design incorporates a clever mechanism for in-process de-gritting which greatly ...


    By Base Structures Ltd

  • Profi survey 2008

    The German agricultural magazine “Profi” published at the end of 2008 the results of a national biogas operator survey. Profi asked a total of 2.580 or approximately 70% of the 3700 German biogas plant operators about their opinion regarding service, maintenance, and technical equipment of their plant provider. 631 operators returned the completed questionnaire, of which 297 could be used to ...


    By Triangle Ltd

  • Landmark farm project uses XEBEC’s gas purification system to deliver pipeline-grade natural gas to Michigan Gas Utilities customers case study

    Fennville Biogas Project at a Glance: Type: Animal waste to pipeline-grade natural gas and electricity generation Claim to fame: First commercial facility in North America to generate both pipeline-grade methane and electricity from animal waste Location: Scenic View Dairy, Fennville, Michigan Animal waste received ...


    By Xebec Adsorption Inc.

  • Renewable energy marketplace

    ALLU Group markets two types of equipment for use in biomass energy operations. The ALLU Screener Crusher bucket attaches to a front-end loader. The bucket is designed to aerate, crush, screen and mix at one time. The Screener Crusher has a rigid steel frame, onto which horizontally rotating screening and crushing drums are mounted. All the drums rotate in the same direction. There are several ...


    By BioCycle Magazine

  • Mixed MSW composting is steady as she goes

    Two new facilities came on line in 2006, while one ceased operation and a second is shifting to a new technology. Annual survey identifies a total of 14 plants. Part I STEADY-STATE may be the best phrase to describe the status of facilities composting mixed municipal solid waste in the United States. In fact, steady-state may be the best phrase to describe solid waste composting in general since ...


    By BioCycle Magazine

  • Green Green Grass

    A few years ago the North Sea managed a twelve month period without any major shipping disasters. Good news for the environment you’d have thought. However, in the same period up to one hundred thousand tonnes of oil were estimated to have been released into the sea. Some of this can be put down to natural occurrence, but by far the major part is dispersed from aircraft and shipping fleets ...


  • Plastics Separation In Compost

    Operators say their number one contamination problem is plastic small, large and in-between - in the compost feedstock and thus in the end product. New study and equipment offer some excellent solutions. An air separation unit from Hawker Corp. is attached to the outfeed conveyor of a screen. Plastic is collected in a tube sock (inset) attached to the fan assembly. PRESSURE in Europe to increase ...

  • What are the parameters of an extended-aeration activated-sludge system?

    The activated sludge process is the most widely used biological water and wastewater treatment. As is well known, by its means, suspended-growth microorganisms are applied to breakdown wastes. Aeration, the mixing of air and a liquid, is the means used to speed the reactions involved. Aeration methods include spraying the liquid into the air; diffusing air into the liquid or agitating the liquid ...

  • Steam Heater Pulp Stock Heating Paper Mill

    After upgrading its bleach plant in 1987 to accommodate a two-stage elemental chlorine-free (ECF) bleach sequence, Cross Pointe Paper (now Flambeau River Papers LLC), Flambeau mill in Park Falls, Wis. subsequently added a totally chlorinefree (TCF) sequence in response to market demand. The TCF sequence, however, required heating, rather than cooling, of the mill's mediumconsistency stock during ...


    By Komax Systems, Inc.

  • Plastics Separation in Compost

    Untitled Document Operators say their number one contamination problem is plastic - small, large and in-between - in the compost ...


    By BioCycle Magazine

  • Sample Handling Strategies for Accurate Lead-In-Soil Measurements in the Field and Laboratory

    ABSTRACT The inhomogenous lead-in-soil matrix can present serious obstacles to accurate sample collection and handling. In typical lead-in-soil measurement, particle size related errors in sampling and sample handling often exceed all other sources of error. The magnitude of error can vary widely depending on the particulate nature of the lead contaminant and the effectiveness of control ...

  • Residential Organics Diversion Moves Forward in Ontario

    Untitled Document THIS month, the town of Mark-ham, Ontario is rolling out the first phase of its new 3-stream collection program, starting with 12,000 single-family households. "Mission ...


    By BioCycle Magazine

  • Operator Strategies : Sorting Out the Plastic

    BETTER BUGS Ideas and products in the Better Bugs category attempt to affect the biological components and biochemistry of processes by altering the mix of microorganisms or enzymes present. After all, biology is the foundation of many, if not most, organics recycling systems. Pyrophiles: The first example of Better Bugs involves pyrophilic organisms, bugs that can take the heat. This example is ...


    By BioCycle Magazine

  • Odor Control Advances at Composting Facility

    The Rockland County (New York) Cocomposting Facility began operations in February, 1999, processing biosolids from the five publicly owned treatment works (POTWs) in the county. The Rockland County Solid Waste Management Authority (RCSWMA) owns the facility, but contracted with Waste Management of New York to design, build and operate (DBO) the 110 wet tons/day agitated bin composting facility ...


    By BioCycle Magazine

  • Processing Wastewater Sludge Using Dewatering Containers

    The relative cost of dewatering equipment varies widely and is directly related to the processing rate. For smaller utilities that need to dewater sludge in batches, dewatering containers are an alternative that can be relatively inexpensive and simple when compared to other technologies on the market. The most common type of dewatering container is based on a roll-off box design, although any ...


    By Flo Trend® Systems, Inc.

  • A Citizen`s Guide to Bioremediation

    What is bioremediation? Bioremediation is a treatment process that uses naturally occurring microorganisms (yeast, fungi, or bacteria) to break down, or degrade, hazardous substances into less toxic or nontoxic substances. Microorganisms, just like humans, eat and digest organic substances for nutrients and energy. In chemical terms, 'organic' compounds are those that contain carbon and hydrogen ...

  • Compost Operators Forum · Modeling a Compost Facility

    GEORGIA leads the nation in poultry production, processing nearly 1.5 billion birds a year. A majority of the poultry operations are concentrated in north Georgia. With over 1.5 million tons of poultry litter produced on an annual basis, some of the resulting issues facing the poultry production industry include: Reduced land area on farms to apply increasing amounts of litter; Increasing buffer ...


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