digester Articles
-
The economics of advanced digestion
Abstract Historically, the focus sewage sludge digestion was to stabilise the sludge and reduce the odour emitted. Pathogen reduction, solids destruction and biogas production then became important. In recent years a number of advanced digestion processes have become available which can be added to the conventional digestion process. Initially advanced treatment methods for treating sludge were ...
-
Thermal hydrolysis of the lipid and protein fractions of wastewater sludge: implications for digester performance and operational considerations
ABSTRACT Thermal hydrolytic pretreatment of wastewater sludge followed by mesophilic anaerobic digestion poses significant benefits in terms of sludge minimization and pathogen reduction; however, high levels of volatile fatty acids (VFA) in digester effluent reveal an interruption in the efficient conversion of organic material to methane gas. Residual soluble chemical oxygen demand (COD) not ...
-
Independent review of retrofitting Cambi to mad
ABSTRACT Denmark has taken a very positive view of recovering energy from organic wastes by anaerobic digestion (AD) and then using the digestate (digested material) on land. Substituting CHP (combined heat and power) from AD for fossil energy is part of the national energy plan. Co-digestion of manure, putrescible waste and biosolids is becoming increasingly common. Part of the reason for ...
-
Sanitising black water by auto-thermal aerobic digestion (ATAD) combined with ammonia treatment
The effect of a two-step process on the concentration of pathogens and indicator microorganisms in black water (0.9–1% total solids) was studied. The treatment combined auto-thermal aerobic digestion (ATAD) and ammonia sanitisation. First, the temperature of the black water was increased through ATAD and when a targeted temperature was reached (33, 41 and 45.5 °C studied), urea was added to a ...
-
Combined experiences of thermal hydrolysis and anaerobic digestion – latest thinking on thermal hydrolysis of secondary sludge only for optimum dewatering and digestion.
ABSTRACT The basic principles of batch thermal hydrolysis process (THP) are well known as a pre-treatment to anaerobic digestion (AD) . Early work done in the 70s in the USA and the 80s in Japan demonstrated the optimum time and temperature for thermal hydrolysis being 340 F for 30minutes. These principles have been put into full practice in 20 plants around the world at plants ranging from 5 ...
-
Factors affecting decay of
Salmonella Birkenhead and coliphage MS2 during mesophilic anaerobic digestion and air drying of sewage sludgeFactors affecting the decay of Salmonella Birkenhead and coliphage, as representatives of bacterial and viral pathogens, respectively, during mesophilic anaerobic digestion (MAD) and air drying treatment of anaerobically digested sewage sludge were investigated. Controlled concentrations of S. Birkenhead were inoculated into non-sterile, autoclaved, γ-irradiated and nutrient-supplemented ...
-
Enzymatic treatment effects on dewaterability of anaerobically digested biosolids-I: performance evaluations
Abstract This paper reports on the ability of an enzymatic pre-treatment to significantly improve the conditioning of wastewater sludges (biosolids) significantly using by a polymeric flocculant. Experiments used anaerobically digested biosolids samples from two different municipal wastewater treatment facilities, and a formulation containing several different hydrolytic enzymes. Samples were ...
By JBMbio.com
-
What are the benefits of feed pellet machines?
Feed pellet machine is a piece of equipment used to produce feed pellets, also known as pellet feed machine, feed pellet machine or pellet feed forming machine. It mainly uses corn, soybean meal, straw, grass, rice husk and other raw materials, and directly presses them into the required feed particles after crushing treatment. The finished feed produced by the feed pellet mill is basically ...
-
How To Choose A Suitable Feed Pellet Machine
Feed pellet machine widely used in large, medium and small aquaculture, food feed processing plants, livestock farms, poultry farms, individual farmers, small medium-sized farms, large, medium and small feed processing plants. Zhengzhou Fusmar Machinery mainly produces pellet machines such as feed pellet machine, straw briquetting machine, wood pellet machine, straw pellet machine. As well as ...
-
Verification of an alternative sludge treatment process for pathogen reduction at two wastewater treatment plants in Victoria, Australia
At South East Water wastewater treatment plants (WwTPs) in Victoria, Australia, biosolids are stockpiled for three years in compliance with the State guidelines to achieve the highest pathogen reduction grade (T1), suitable for unrestricted use in agriculture and landscaping. However, extended stockpiling is costly, may increase odour nuisance and greenhouse gas emissions, and reduces the ...
-
Microbial safety of air-dried and rewetted biosolids
To assess microbial safety of treated sewage sludge (biosolids), we examined the inactivation of microbial indicators for potential bacterial, viral and protozoan pathogens. The levels of indicators were determined throughout the air-drying and storage phases of anaerobically digested sewage sludge. Samples were collected from two wastewater treatment plants (WWTPs) in Victoria, Australia. ...
-
Pelletizing Price of Small Fowl Feed Making Maker
When buying a cellphone, inquire about resolution, memory, running memory, pixels, and so on. Due to the fact that individuals's demands for smart phones are obtaining higher as well as greater. The exact same goes with pellet feeders. So how much pelletizing price can a little fowl feed making machine distributor attain? Related post:poultry feed plant Tiny poultry feed making ...
-
New Research Demonstrates Safety of SOIL’s Waste Treatment Process
SOIL is committed to fully treating 100% of the wastes from each and every household EkoLakay toilet – and we take that responsibility very seriously! Our treatment process has been developed alongside global experts and exceeds standards set by the World Health Organization for the safe treatment of human waste. Once the collected waste from the sanitation service has been treated and ...
By SOIL Haiti
-
Land application of sewage sludge (biosolids) in Australia: risks to the environment and food crops
Australia is a large exporter of agricultural products, with producers responsible for a range of quality assurance programs to ensure that food crops are free from various contaminants of detriment to human health. Large volumes of treated sewage sludge (biosolids), although low by world standards, are increasingly being recycled to land, primarily to replace plant nutrients and to improve soil ...
-
The Challenges of Sludge and Slurry Waste Treatment
Valorising sludge and slurry Municipal waste treatment plants, among other processes, generate sludge and slurry-type waste that requires treatment. It is necessary to apply different technologies in line with the characteristics and components of the waste to be treated. Waste can be processed and valorised using waste-to-product methods, thereby generating fuels or products that can be used as ...
By TECAM
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you