scholarly journals Verification of an alternative sludge treatment process for pathogen reduction at two wastewater treatment plants in Victoria, Australia

2017 ◽  
Vol 15 (4) ◽  
pp. 626-637 ◽  
Author(s):  
R. Irwin ◽  
A. Surapaneni ◽  
D. Smith ◽  
J. Schmidt ◽  
H. Rigby ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Microbiological Quality ◽  
Storage Period ◽  
Enteric Virus ◽  
Enteric Pathogens ◽  
Salmonella Spp ◽  
Sludge Treatment ◽  
Helminth Infections ◽  
Pathogen Reduction

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 fertiliser value of the biosolids. A verification programme of sampling and analysis for enteric pathogens was conducted at two WwTPs where sludge is treated by aerobic and anaerobic digestion, air drying (in drying pans or solar drying sheds) and stockpiling, to enumerate and, if present, monitor the decay of a range of enteric pathogens and parasites. The sludge treatment processes at both WwTPs achieved T1 grade biosolids with respect to prescribed pathogenic bacterial numbers (<1 Salmonella spp. 50 g−1 dry solids (DS) and <100 Escherichia coli g−1 DS) and >3 log10 enteric virus reduction after a storage period of one year. No Ascaris eggs were detected in the influent to the WwTPs, confirming previous studies that the presence of helminth infections in Victoria is extremely low and that Ascaris is not applicable as a control criterion for the microbiological quality of biosolids in the region.

Ozonation of wastewater sludge for reduction and recycling

2002 ◽  
Vol 46 (10) ◽  
pp. 71-77 ◽  
Author(s):  
K.-H. Ahn ◽  
K.Y. Park ◽  
S.K. Maeng ◽  
J.H. Hwang ◽  
J.W. Lee ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Economic Assessment ◽  
Pilot Scale ◽  
Wastewater Sludge ◽  
Ozone Treatment ◽  
Sludge Treatment ◽  
Micro Particles ◽  
Belt Press ◽  
Treatment And Disposal

An ozone treatment system was introduced as an alternative method for municipal sludge treatment and disposal. A pilot-scale facility was built to investigate the feasibility of the ozonation for sludge reduction and recycle. The system consists of three main parts; advanced wastewater treatment, sludge ozone treatment and belt press dewatering. Ozonation of wastewater sludge resulted in mass reduction by mineralization as well as volume reduction by improvement of dewatering characteristics. The supernatant of the ozonated sludge, consisting of solubilized organics and micro-particles, proved to be an effective carbon source for denitrification. A simple economic assessment reveals that the ozonation process can be more economical than incineration for sludge treatment and disposal at small- and medium-sized wastewater treatment plants.

Identification of pathogen bacteria and protozoa in treated urban wastewaters discharged in the Ebro River (Spain): water reuse possibilities

2013 ◽  
Vol 68 (3) ◽  
pp. 575-583 ◽  
Author(s):  
R. Mosteo ◽  
M. P. Ormad ◽  
P. Goñi ◽  
J. Rodríguez-Chueca ◽  
A. García ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Reuse ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Research Work ◽  
Municipal Wastewater Treatment ◽  
Tertiary Treatment ◽  
Salmonella Spp ◽  
Free Living ◽  
Municipal Wastewater Treatment Plants

The aim of this research work is to identify the presence of pathogens, bacteria and protozoa, in different treated urban wastewaters and to relate biological pollution with the processes used in wastewater treatment plants. A study of the possibilities for water reuse is carried out taking into account bacterial and parasite composition. The analysed bacteria and protozoa are: Enterococcus faecalis, Pseudomonas aeruginosa, Staphylococcus aureus, Clostridium perfringens (spore), Salmonella spp., Legionella spp., helminths eggs, Giardia, Cryptosporidium spp. and free-living amoebae (FLA). The selected municipal wastewater treatment plants (MWTPs) are located in Navarra (Spain) and the main difference between them is the use of natural lagoons as tertiary treatment in some plants. The results concerning bacteriological identification showed contamination of mainly faecal origin, and the use of natural lagoons as tertiary treatment in some MWTPs produced an important disinfection effect. Moreover, pathogen parasites such as Giardia and Cryptosporidium were not detected in the samples studied although FLA were identified in all cases.

scholarly journals Clustering micropollutants based on initial biotransformations for improved prediction of micropollutant removal during conventional activated sludge treatment

2020 ◽  
Vol 6 (3) ◽  
pp. 554-565 ◽  
Author(s):  
Yuxin Wang ◽  
Kathrin Fenner ◽  
Damian E. Helbling
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plants ◽  
Sludge Treatment ◽  
Conventional Activated Sludge ◽  
Micropollutant Removal

The lack of fundamental insights on the fate of micropollutants during activated sludge treatment presents one of the biggest challenges in optimizing their removal in wastewater treatment plants.

Application of heat shock protein assay and proteome assay to water from wastewater treatment plant

2008 ◽  
Vol 57 (8) ◽  
pp. 1183-1189 ◽  
Author(s):  
Naoyuki Funamizu ◽  
Mikako Takenaka ◽  
Junkyu Han ◽  
Hiroko Isoda
Keyword(s):  
Wastewater Treatment ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Cho Cells ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Chinese Hamster ◽  
Decay Process ◽  
Aeration Tank ◽  
Sludge Treatment

In this study we applied bioassay using Chinese hamster ovary (CHO) cells with a heat shock protein (HSP) 47 promoter to the effluent of the wastewater treatment plants in Sapporo and we observed the statistically significant HSP production. This implied the effluent contained some organic matter which can stress the CHO cells. To investigate the possible causes of the toxicity of the effluent, we applied the assay to the rejected water from the sludge treatment plant, the mixtures of sewage and rejected water. The evolution of HSP production during the aerobic decay process and thickening process of sludge was also examined. These assay results showed that dissolved microbial products generated and/or released from activated sludge during its decay process in the aeration tank and during thickening and dewatering process in the sludge treatment train contributed to develop HSP production. The proteomics analysis was also applied to the effluent and detected the production of elongation factor 1β. This result implies that the effluent from wastewater treatment plants may cause changes in cell proteins involved in allergic reaction.

Sludge utilisation in agriculture: possibilities and prospects in Greece

2002 ◽  
Vol 46 (10) ◽  
pp. 231-238 ◽  
Author(s):  
A.D. Andreadakis ◽  
D. Mamais ◽  
E. Gavalaki ◽  
S. Kampylafka
Keyword(s):  
European Union ◽  
Wastewater Treatment ◽  
Critical Review ◽  
Wastewater Treatment Plants ◽  
The European Union ◽  
Short Term ◽  
Sludge Treatment ◽  
Sludge Disposal ◽  
Qualitative Characteristics

The paper presents the prospects for agricultural utilisation of the sludge produced from wastewater treatment plants in Greece and more specifically focuses on a critical review of the legislatory framework, determination of the quantitative and qualitative characteristics of the produced sludges, examination of possible sludge treatment methods and evaluation of the possibilities and prospects of sludge utilisation on the basis of the above considerations. Landfilling is practically the only route to sludge disposal in Greece. However, in view of the anticipated future restrictions for landfilling within the European Union, this method is clearly a short-term solution and alternative options, including agricultural reuse, must be implemented. The results of a recent survey are presented and discussed in relation to this need.

Instrumentation, control and automation for full-scale manure-based biogas systems

2006 ◽  
Vol 54 (9) ◽  
pp. 1-8 ◽  
Author(s):  
J. Wiese ◽  
M. Haeck
Keyword(s):  
Wastewater Treatment ◽  
Renewable Energy ◽  
Technical Progress ◽  
Economies Of Scale ◽  
Wastewater Treatment Plants ◽  
Full Scale ◽  
Wastewater Sludge ◽  
Sludge Treatment ◽  
Biogas Plants

In recent years manure-based biogas plants (MBBP) have won more and more importance, because of the numerous ecological advantages. The processes are similar to processes, which have been well known for many decades in anaerobic wastewater/sludge treatment. As a result of technical progress and permanently rising prices for non-renewable energy, MBBPs have become more and more economically reasonable. Because of the economies of scale law more and more larger MBBPs are being built (250–2000 kWel). With regard to investment costs, reactor volumes and complexity etc., these (centralized) plants are comparable with small wastewater treatment plants (WWTP). Consequently, as actually in the case of the small WWTPs a rising use of instrumentation, control and automation (ICA) for larger MBBPs can be observed.

scholarly journals Assessment of the current status of waste sludge treatment of the industrial parks in Binh Duong Province

2020 ◽  
pp. 435-441
Keyword(s):  
Wastewater Treatment ◽  
Industrial Waste ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Current Status ◽  
Industrial Park ◽  
Sludge Treatment ◽  
Waste Sludge ◽  
Helminth Eggs ◽  
Industrial Parks

Study on sampling sludge from 04 industrial parks in Binh Duong province such as My Phuoc, Dong An, Viet Huong 1, Song Than 2 to analyze the pollution criteria to assess the pollution possibility of industrial waste sludge. The research results show that: at present, the total volume of sludge generated today in the industrial park fluctuates about 4,450 – 6,255 kg/day, equivalent to dry sludge volume is 1,035.725 – 1,532.11 kg/day. The estimated volume of dry sludge generated from industrial parks in the future from 2019 to 2020 ranges from 30,023 to 31,396 kg/day. Most sludge from 04 wastewater treatment plants hadn’t heavy metals (Hg, Pb, Cu, Ni, Cr, Zn, Cd), especially Dong An Industrial park Treatment plant had Zn, value 49.7 – 49.9 mg/l. The sludge from the wastewater treatment plants of 04 industrial parks had amount of helminth eggs that exceeds the USEPA's regulations on pathogens (type A sludge).

Primary and A-Sludge Treatment by Anaerobic Membrane Bioreactors in View of Energy-Positive Wastewater Treatment Plants

2021 ◽  
Author(s):  
Amr Mustafa Abdelrahman ◽  
Muhammed Furkan Aras ◽  
Busra Cicekalan ◽  
Malhun Fakioglu ◽  
Seyma Cingoz ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Membrane Bioreactors ◽  
Sludge Treatment ◽  
Anaerobic Membrane Bioreactors
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