Planning the best strategy for sludge treatment and disposal operations

1994 ◽  
Vol 30 (8) ◽  
pp. 149-158 ◽  
Author(s):  
Robert D. Davis
Keyword(s):  
Wastewater Treatment Plants ◽  
Cost Effective ◽  
Operating Costs ◽  
Environmental Legislation ◽  
Sludge Treatment ◽  
The Public ◽  
Assessment Approach ◽  
Regional Basis ◽  
Disposal Options ◽  
Treatment And Disposal

Sludge treatment and disposal operations on a local or regional basis need careful planning to ensure that the strategy undertaken is environmentally acceptable, reliable and cost-effective. A database of information is needed for the area concerned which may include up to 100 wastewater treatment plants of varying size. Sludge quantities and quality have to be assessed now and into the future. Disposal options for sludge have to be analysed by an environmental assessment approach which studies the accessibility of all outlets, environmental legislation and attitudes of collaborating agencies and the public at large. Other wastes which may compete with sludge for disposal outlets must be considered. Outlets which involve recycling and beneficial use of sludge are advantageous but may not be practical. Sludge treatment must be evaluated in relation to the disposal options available. Sludge treatment centres, treating sludge from several surrounding wastewater plants, may be required especially if thermal drying or incineration are likely options. Economic evaluation has to consider capital and operating costs of sludge treatment and transport and other costs associated with disposal. The paper discusses how to evaluate all the information and options and find a suitable sludge treatment and disposal strategy.

Treatment and Quality of Sewage Sludge in Germany - Results of a Survey

2007 ◽  
Vol 2 (1) ◽  
Author(s):  
A. Meda ◽  
C. Schaum ◽  
M. Wagner ◽  
P. Cornel ◽  
A. Durth
Keyword(s):  
Sewage Sludge ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Current Status ◽  
Sludge Treatment ◽  
Sewage Sludge Treatment ◽  
Treatment And Disposal ◽  
German Association ◽  
Entire Treatment

TIn 2004, the German Association for Wastewater, Water and Waste (DWA) carried out a survey about the current status of sewage sludge treatment and disposal in Germany. The study covered about one third of the wastewater treatment plants and about two thirds of the entire treatment capacity (expressed in population equivalents) in Germany. This provides an up-to-date and representative database. The paper presents the most important results regarding sludge treatment, process engineering, current disposal paths and sewage sludge quality.

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.

Analysis of Management and Disposal Alternatives for Low Activity Radioactive Waste

2009 ◽  
Author(s):  
Keith D. Anderson
Keyword(s):  
Radioactive Waste ◽  
United States Of America ◽  
Cost Effective ◽  
The United States ◽  
Regulatory Structure ◽  
The Public ◽  
Regulatory Limits ◽  
Disposal Options ◽  
Low Level Radioactive Waste ◽  
Low Activity

Government and commercial decommissioning and remediation activities at nuclear sites and facilities often generate in large volumes and mass radioactive waste that is of low activity. In large part, the low activity radioactive waste generated from decommissioning and remediation activities are below regulatory limits for low level radioactive waste, while not meeting site specific dose and risk-based cleanup criteria. Policies and strategies for the remediation, management, and disposal of low activity radioactive waste in these circumstances often explore alternative options to fully licensed disposal. Primary goals in exploring alternative disposal options are protection of the public and the environment, while achieve a cost-effective solution. Vague regulations and arbitrary interpretation by federal and state regulators may enhance alternative disposal options or quash efforts by those conducting the remediation and decommissioning. Fundamental to the issues is the overriding concern of a lack of clarity and increased liability in the regulatory structure of the grey area that is low activity radioactive wastes. This paper explores the current efforts by the United States of America and International regulatory community to better define low activity radioactive waste and to provide effective and protective waste management and disposal policies and strategies.

Study on Optimizing the Managerial Strategies of Municipal Sludge Treatment and Disposal in a City of Northern China

2012 ◽  
Vol 178-181 ◽  
pp. 950-953
Author(s):  
Jian Lv ◽  
Xiao Ming Bu ◽  
Ji Yuan Li ◽  
Qing Yi Meng ◽  
Wen Zhong Li ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Northern China ◽  
Municipal Wastewater Treatment ◽  
Process Chain ◽  
Sludge Treatment ◽  
Whole Process ◽  
Sludge Disposal ◽  
Managerial Strategy ◽  
Treatment And Disposal

A whole process chain managerial strategy is presented to solve the problems of sludge treatment and disposal of municipal wastewater treatment plants in a city of northern China. The problems include negligence of the sludge treatment, scarce capacity, ambiguous responsiblity, lack of whole process management and coherence of management on wastewater and sludge treatment. The system of whole process chain managerial strategy can provide a safe and effective platform to collect the relevant data about sludge disposal. In the system，all executants have the obligation and responsibility to record the data, supervise the operation and management of other subject, and give the report of the record data regularly. The system can be used to discover the problem in sludge disposal, and also it can give suggestion for the planning and adjust the ability of sludge disposal in a city for long-term.

Sludge as source of energy and revenue

2004 ◽  
Vol 50 (9) ◽  
pp. 197-204 ◽  
Author(s):  
T.I. Onyeche
Keyword(s):  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Economic Benefits ◽  
Sludge Reduction ◽  
Sludge Dewatering ◽  
Sludge Treatment ◽  
Extra Energy ◽  
Treatment And Disposal ◽  
Low Pressures

Sludge is a residue/product from wastewater treatment plants and contains most of the contaminants released during human activities. Some stringent environmental regulations on sludge treatment and disposal exist in many countries. This has resulted in increasing interest in sludge treatment methods that encourage sludge reduction and improvement in biogas production during anaerobic digestion processes. This work demonstrates the first exploitation of valuable energy from homogenised sludge at technical scale with mass reduction. The optimal combination of sludge homogenisation at relatively low pressures using a modified high-pressure homogeniser led to the success of this unique project. Results showed that about 30% more energy could be obtained from thickened and disrupted sludge than from untreated samples. The energy produced was higher than that invested during disruption and digestion processes. About 23% sludge reduction was also observed with no increase in chemical oxygen demand. This new process can produce extra energy for local electrification and heating the digester while the sludge reduction provides economic benefits. Concentration of sludge causes reduction in investment cost on digester as well as reduction in operational time for sludge dewatering.

Sludge Management and its Development in China

2013 ◽  
Vol 295-298 ◽  
pp. 1299-1302
Author(s):  
Shun Bing Wang
Keyword(s):  
Wastewater Treatment ◽  
Financial Support ◽  
Wastewater Treatment Plants ◽  
Management Practice ◽  
Current Situation ◽  
Huge Amount ◽  
Sludge Management ◽  
Sludge Treatment ◽  
The Government ◽  
Treatment And Disposal

With the booming construction of wastewater treatment plants, sludge management has become a tough problem in China. This article presents the current situation of sludge management and its development in China, mainly focusing on sludge treatment and disposal technologies applied in sludge management practice and related policies. In future, sludge management will receive more attention and more financial support will be provided by the government. To establish a system of sustainable sludge management, efficient and economical technologies, huge amount of investments and strict policies are the critical and breakthrough points.

Production of fuels on the basis of sewage sludge through conditioning using high calorific value fractions

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Karl-Georg Schmelz ◽  
Anja Reipa ◽  
Hartmut Meyer
Keyword(s):  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Calorific Value ◽  
Fluidised Bed ◽  
Sludge Treatment ◽  
Heating Value ◽  
Fine Coal ◽  
Used Cars ◽  
Plastic Components

Emschergenossenschaft and Lippeverband operate 59 wastewater treatment plants which produce approx. 100,000 Mg TS of sewage sludge each year. Using sludge pressure pipelines, about 60 % of this sludge are transported to the central sludge treatment plant in Bottrop. The digested sludges are conditioned using fine coal and polymers and are dewatered using membrane filters. By adding coal, the heating value of the sludge is raised which enables autothermal combustion of the dewatered sludges in fluidised bed furnaces at the central sludge treatment plant. In order to replace coal, a fossil fuel, as conditioning agent, experiments were conducted using alternative materials with high heating values. The addition of shredder fluff agglomerates proved to be particularly successful. Shredder fluff agglomerates are a residue from the recycling of used cars and are generated in a multistage process (e.g. Volkswagen-SiCon Process) by separating the light shredder fraction (plastic components etc.) from the total shredder fluff. The fibrous material is outstandingly suitable for improving the dewaterability and for sufficiently raising the heating value of the dewatered sludge in order to enable autothermal combustion. Since first experiments showed very positive results, a full-scale long-term test-run will take place in 2007.

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