scholarly journals Hydraulic Design of Sewage Treatment Plant for Junagadh Agricultural University Campus

2018 ◽  
Vol 13 (3) ◽  
pp. 472-480
Author(s):  
RAM VAIBHAV M ◽  
MAKWANA AJAY D. ◽  
D. S. THANKI
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Research Field ◽  
University Campus ◽  
New Schools ◽  
Recycled Water ◽  
Active Sludge ◽  
Hydraulic Design ◽  
Sludge Drying

The Junagadh Agricultural University campus is located in Junagadh, which lies in western Gujarat. The human population on the campus is multiplied distinctively due to the establishment of new schools and hostels.The university campus had a population of 1418 in the year 2013 when the supply of water was 152 lit/day per person and the sewage generation was 0.0084 m3/s (725.76 m3/day).Hence, a sewage treatment plant (STP) with suitable capacity is needed to deal with the elevated sewage. The recycled water can be utilized for agricultural purposes. This paper discusses about the design of STP and its major components such as skimming, grit chamber, and screening chamber, active sludge, sedimentation tank and secondary clarifier in the end sludge drying beds. The proposed design is suitable for 0.0672 m3/s sewage and would help to provide58 MLD process capacity. In the end, treated water will have been used for irrigation purpose in the research field of a university.

scholarly journals Examine Design Considerations for Sustainable Management of an Overloaded Sewage Treatment Plant in a Residential Campus

2019 ◽  
Vol 8 (4S2) ◽  
pp. 104-107
Keyword(s):  
Water Treatment ◽  
Sustainable Management ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Recycled Water ◽  
Cost Of Construction ◽  
Great Step ◽  
Centralized System

The era is now facing water scarcity and the available water is being depleted at a faster rate to meet the needs of the growing population. At this juncture, it is essential to use the reduce-reuse-recycle strategy. Reducing excessive usage of water for essential needs and reusing the recycled water for non-consumptive purposes can be a great step in the conservation of water. The waste water from various sources can be collected and treated using an STP. In most of the cases, water treatment requires a centralized system of control and operation. The STP should be designed by considering the inflow characteristics, objective of the water treatment and availability of resources. There are various operational and managerial constraints while designing an STP. In case of overloaded condition of available STP, either some modification has to be done to prevent the decrease in efficiency of the obtained output or a new plant has to be constructed. In this case study, we have analyzed three different approaches to solve the issue of an overloaded STP. The results based on various criteria including cost of construction and maintenance have been discussed.

scholarly journals Relationship between centrifugation and drying of sludge and the organic halogens

2010 ◽  
Vol 58 (5) ◽  
pp. 185-190
Author(s):  
Karel Hrich ◽  
Bořivoj Groda
Keyword(s):  
Agricultural Land ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Cement Kiln ◽  
Reject Water ◽  
Sludge Drying ◽  
Dried Sludge ◽  
Organic Halogens

This work is focused on determination of adsorbable organic halogens (AOX) concentration in the digested sludge from the sewage treatment plant and the losses of this component during dewatering and drying of sludge. Drying of the sludge from wastewater treatment plant is not extended too much in Czech Republic. In this work, the AOX are monitored, because AOX is one of the limits restraining use of the sludge on an agricultural land. Another reason is technological demand for using the sludge in cement processing, because chlorine in AOX can cause decrease in a heat transfer effect in a cement kiln. It is clear from the results that both centrifuged and dried sludge from the sewage treatment plant Brno fulfilled limits for using sludge on agriculture land. They can also be composted, in case they meet other requirements. If not, it is a possibility of co-incineration in cement kiln. In such case, limit for total chlorine including the AOX is required too. This limit was not exceeded. Another aim was to calculate a mass balance of AOX during the centrifugation and drying processes. It was found out, that after centrifugation the main part of AOX remained in the centrifuged sludge (96.4 %). The rest was drawn-off with reject water. 60 % of AOX in the reject water were dissolved compounds. A similar situation occurred during the drying process. More than 99 % of AOX was bound in the dried sludge. The air and vaporised water contained such quantity of AOX, which corresponded with the amount of the dust in the air and the amount of particles of sludge in vaporised water.

scholarly journals Performance of rice straw fiber improving the drying of waste activated sludge

2021 ◽  
Vol 267 ◽  
pp. 02042
Author(s):  
Xue Li ◽  
Lingyu Wang ◽  
Jing Huang ◽  
Huishuang Yi ◽  
Zhiming Xu ◽  
...  
Keyword(s):  
Particle Size ◽  
Rice Straw ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Subsequent Treatment ◽  
Factors Affecting ◽  
Different Temperatures ◽  
Sludge Drying ◽  
Drying Efficiency

The high moisture content of the excess sludge in the sewage treatment plant has brought great difficulties to the subsequent treatment. In this study, rice straw fiber was collected as a conditioner for adding to the sludge. The effect of different grain diameter and dosages of straw fiber on sludge drying efficiency were investigated under different temperatures. Drying temperature is one of the most important factors affecting sludge drying rate. Compared with the original sludge, the drying efficiency of sludge adding rice straw fiber was higher. The effect of 35-80 straw fiber was 20%, and the water content decreased from about 70% to less than 10%. The effect of straw fiber particle size on sludge drying is affected by temperature, and the particle size should be taken into account at low temperature.

Patterns of estrogen occurrence in sewage treatment plant effluent (STPE) from a university campus.

2012 ◽  
Author(s):  
Senorpe Asem - Hiablie ◽  
Herschel A Elliott ◽  
Clinton D Church ◽  
John E Watson ◽  
Clinton F Williams
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
University Campus

Solar Energy for Sludge Drying in Alexandria Metropolitan Area: Case Study in Egypt

1990 ◽  
Vol 22 (12) ◽  
pp. 193-204 ◽  
Author(s):  
A. A. Hossam ◽  
S. G. Saad ◽  
H. H. Mitwally ◽  
L. M. Saad ◽  
L. Noufal
Keyword(s):  
Heavy Rainfall ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Climatic Conditions ◽  
Wet Season ◽  
Drying Time ◽  
Treatment Processes ◽  
Sludge Drying

An experimental study was conducted to assess the drainability of sludge generated by different treatment processes, and to assess a pilot solar heated sand drying bed in comparison with the regular beds located in the pilot plant at Alexandria Eastern Sewage Treatment Plant. It was found that the climatic conditions were generally favourable for dewatering sludge on sand drying beds except when there was heavy rainfall during the wet season which prolonged the drying time. The solar air heated drying beds saved about 35% of the bed area as compared with conventional sand drying beds, and the drying time was cut from 18 days to 8 days. It was also found that the solar air heated beds were less expensive than the conventional open sand beds.

Research on the Ladder Pricing Method of Reclaim Water Based on Cost-Plus

2014 ◽  
Vol 1073-1076 ◽  
pp. 1724-1728
Author(s):  
Xiao Jun Liu ◽  
Si Ru Han ◽  
Xi Luo
Keyword(s):  
Sewage Treatment ◽  
Market Price ◽  
Reclaimed Water ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Water Source ◽  
Pricing Model ◽  
Recycled Water ◽  
Functional Relations ◽  
Price Demand

Reclaimed water can effectively alleviate the water crisis which is the second water source of city. The functional relations in cost price, demand and transportation of the reclaimed water using are determined by the method of cost-plus which is based on the premise that the funds of reclaimed water network construction should be recovered. The users are divided into different groups according to the distance between the user and the water recycling. According to the demand diversity in different users, a complex tiered pricing model is established which is relevant of water requirement and the distance of conveyance. Finally, taking the Second Sewage Treatment Plant in Xi'an as an example, the water price of the user - the western suburbs Power Plant of Xi'an is calculated using this model. The result is consistent with the actual situation, which can verify the accuracy and usefulness of this article pricing model. All of these have provided a theoretical basis for the development of the market price of recycled water.

Thermal Decomposition Characteristics and Drying Process of Municipal Sludge

2017 ◽  
Vol 898 ◽  
pp. 2464-2469 ◽  
Author(s):  
Qi Gang Zhao ◽  
Ya Li Wang ◽  
Zuo Ren Nie ◽  
Hong Liu ◽  
Su Ping Cui
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Cement Clinker ◽  
Cement Kiln ◽  
Municipal Sludge ◽  
Drying Process ◽  
Sludge Stabilization ◽  
Sludge Drying ◽  
Clinker Production

Using cement kiln dispose sludge from sewage plants can achieve the sludge stabilization, harmless, reduction and resource comprehensive utilization purposes. This is Not only to solve the problem of sludge treatment which is difficult to solve by sewage treatment plant, but also to make full use of the sewage treatment plant sludge to replace part of cement clinker production materials. And it makes full use of sludge incineration emitted in the process of low calorific value. Municipal sludge contains more moisture. It is necessary to dry the sludge outside the kiln before entering kiln process. As cement kiln co-processing, it should be combined with the characteristics of NSP clinker production, it is necessary to not only consider the total energy consumption of the drying process, but also the re-use of dried sludge heat value, as well as consider the total of water into the kiln by drying sludge affecting the whole clinker production process. In this paper, with the initial solid content 20%, dry heating value 3400 cal/g sludge as a research object, the moisture morphology, thermal characteristics, drying technological parameters and composition of water after drying in sludge were analysed. This issue combines sludge drying with cement kiln disposal, which can not only solve the heat and odor problem during the individual sludge drying process, but also provide a theoretical basis for cement kilns co-disposal of municipal sewage sludge to achieve the purposes of sludge stabilization, harmless, minimization and resource utilization.

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