METHOD FOR CHOOSING THE TECHNOLOGY FOR PURIFYING PERIODIC WASTEWATER DISCHARGE

2012 ◽  
Vol 2 (4) ◽  
pp. 71-74 ◽  
Author(s):  
A. A SIZOV ◽  
N. S SERPOKRYLOV ◽  
Ya. Yu KAMENEV
Keyword(s):  
Waste Water ◽  
Power Consumption ◽  
Chemical Treatment ◽  
Water Discharge ◽  
Wastewater Discharge ◽  
Consumption Level ◽  
Level Of Automation ◽  
Design Materials ◽  
Materials Used

It has been found out that for purifying periodic waste-water discharge in Russia and abroad the modular fixed and mobile treatment plants of various types are mainly used. These plants combine the units of mechanical, biochemical and physic-chemical treatment being differed by special features of equipment and constructive design, materials used, power consumption, level of automation. The choice is more often made according to ecology-economic principles.

An experimental investigation of wastewater treatment in a grease interceptor trap

2009 ◽  
Vol 4 (2) ◽  
Author(s):  
G. A. Moore ◽  
H. D. T. Dang
Keyword(s):  
Waste Water ◽  
Experimental Investigation ◽  
Short Circuit ◽  
Water Discharge ◽  
New Products ◽  
Food Service ◽  
Wastewater Discharge ◽  
High Concentration ◽  
Oil And Grease ◽  
Sewerage System

Grease interceptor traps (GITs) are widely used by food service facilities to reduce oil and grease (OG) to an acceptable level before waste water discharge to public sewerage and to recover oil and grease as a feedstock for new products. However, wastewater discharge to a simple GIT at high flowrate can result in a short circuit to the outlet. Consequently, there remains a high concentration of OG potentially leading to blockage of the sewerage system and a waste of valuable resources. It is therefore important to understand the characteristics and fluid flow behaviour of a GIT. The research presented in this paper relates to an intensive experimental investigation of a single GIT serving a large commercial kitchen and multiple restaurants. Composition and physical characteristics of the wastewater was quantified and analysed. Short circuiting flows were also observed. The removal efficiency of this GIT was found to be very low; indicating inefficiency of this GIT due to an inappropriate design that fully complied with local regulations. This indicates that there is ineffective design of baffles and/or inlet-outlet positions of the GIT and a need for review of regulations governing these devices.

Study on Water Quality Improvement of Streams in Baoan District, Shenzhen City, China

2011 ◽  
Vol 347-353 ◽  
pp. 1902-1905
Author(s):  
Hua Li You
Keyword(s):  
Waste Water ◽  
Mathematical Model ◽  
Water Quality ◽  
Fresh Water ◽  
Water Discharge ◽  
Water Environment ◽  
Oxygen Demand ◽  
Polluted Water ◽  
Integrated Analysis ◽  
Shenzhen City

Water is the basis of natural resources and strategic economic resources.Deteriorated water environment of streams in Shenzhen city could have a great impact on ecological safety, people's health,and economic development.Based on the data of field observation and Remote sensing (RS) image,integrated analysis of the water degradation causes,and the changes of biochemical oxygen demand in five days(BOD5）concentration by mathematical model were carried out,which is on basis of percentage of waste water disposal,fresh water transformation,and harbor excavation, respectively.The results show that degradation causes of water quality were resulted from waste water discharge, harbor construction,and ecological environment damage, which could lead to slowly water exchange. Accordingly,the pollution can be easily to store in the bay,which result in water quality changes.The most important improved countermeasure is the control of waste water, which could be had a great effectiveness to decrease pollution.In addition, fresh water must be supplied after polluted water was cut off,which can be better improvement for water quality.This would be extreme improvement for hydrological dynamics due to 15m harbor excavation,which can significantly reduce BOD5 concentration.The innovation points of this paper is to mathematical model,which is based on the basis of qualitative analysis.

Optimal strategies for stakeholders of Fukushima nuclear waste water discharge in Japan

Marine Policy ◽  
2022 ◽  
Vol 135 ◽  
pp. 104881
Author(s):  
Zhang Xixi ◽  
Qu Tongkun ◽  
Wang Yecheng
Keyword(s):  
Waste Water ◽  
Nuclear Waste ◽  
Water Discharge ◽  
Optimal Strategies

A Study of the Behaviour of a Single-Bladed Waste-Water Pump

2006 ◽  
Vol 220 (2) ◽  
pp. 79-87 ◽  
Author(s):  
J Keays ◽  
C Meskell
Keyword(s):  
Waste Water ◽  
Power Consumption ◽  
Turbulence Model ◽  
Numerical Models ◽  
Sewage Treatment ◽  
Computational Cost ◽  
Primary Source ◽  
Pressure Head ◽  
Primary Objective ◽  
Pump Efficiency

A single-vaned centrifugal pump, typical of the kind employed in waste-water applications (e.g. sewage treatment), has been investigated numerically. The primary objective was to identify a modelling approach that was accurate, but at an acceptable computational cost. A test program has been executed to provide data to validate the numerical models. The global performance of the pump was assessed in terms of the pressure head, the mass flowrate, the power consumption, and the pump efficiency. In addition, time-resolved surface-pressure measurements were made at the volute wall. Five combinations of three modelling approximations (two or 3D; k-ε or Reynolds stress model turbulence model; unsteady or quasi-steady) were investigated and compared with the experimental results. It was found that the choice of turbulence model did not have a significant effect on the predictions. In all cases, the head-discharge curve was well predicted. However, it was found that only the quasi-steady models could capture the trend of the power consumption curve, and hence that of the efficiency. Discrepancies in the magnitude of the power consumption can be accounted for by the lack of losses such as leakage in the numerical models. Qualitative analysis of the numerical results identifies the trailing edge of the impeller as the primary source of power loss, with the flow in the region of the cut water also contributing significantly to the poor overall efficiency of the design.

Impact of waste water discharge on the plant diversity and community structure of Al-Marj Plain, Libya

2015 ◽  
Vol 126 (1-2) ◽  
pp. 6-15 ◽  
Author(s):  
Kamal H. Shaltout ◽  
Manal Fawzy ◽  
Dalia A. Ahmed ◽  
Mo-hamed A. Awad ◽  
Yacoub M. El-Barasi ◽  
...  
Keyword(s):  
Waste Water ◽  
Community Structure ◽  
Plant Diversity ◽  
Water Discharge

scholarly journals PEMANFAATAN POTENSI GAS METANA DI PABRIK KELAPA SAWIT SEI SILAU, PTPN3, SUMATERA UTARA

2016 ◽  
Vol 11 (3) ◽  
pp. 459
Author(s):  
Irhan Febijanto
Keyword(s):  
Waste Water ◽  
Chemical Oxygen Demand ◽  
Palm Oil ◽  
Water Discharge ◽  
Oxygen Demand ◽  
Ghg Emission ◽  
Global Warming Impact ◽  
Methane Gas ◽  
Palm Oil Mill ◽  
Water Waste

Water waste in Palm Oil Mill (POM) is not effectively utilized yet. Before waste water discharge from POM, the waste water is processed by an aerobic treatment in several ponds to decrease the influence of organic matter. Methane gas generated in the anaerobic ponds is a Green Gas House giving a contribution to global warming impact. In Palm Oil Mill of Sei Silau located in North Sumatera, the potential generated methane gas in two anaerobic ponds has been investigated using measurement of Chemical Oxygen Demand (COD) of waste water in the sites. Based on the potential generated methane gas, the reduction of GHG emission is calculated, and the feasibility of the project as CDM project was evaluated.Keywords : Pabrik Kelapa Sawit, gas metana, gas rumah kaca, proyek CDM (CleanDevelopment Mechanism),, COD (Chemical Oxygen Demand)

scholarly journals On the Issue of Water/economic Balances and Water Resources Abstraction Limits Calculation

2011 ◽  
pp. 16-32
Author(s):  
Keyword(s):  
Waste Water ◽  
Water Resources ◽  
River Basin ◽  
Water Discharge

Analysis of methodic recommendation on calculation of the relationships and characteristics has been given on the basis of experience in calculation of water/economic balances and water resources abstraction limits, as well as waste water discharge limits for water/economic parts of the Kama River basin within the frameworks of the Scheme of Water Resources Integrated Use and Protection (SWRIUP) development. Some clarification of the above methods has been proposed.

scholarly journals Pruning the Money-Tree to Ensure Sustainable Growth: Facilitating Sustainable Development Through Market-Based Instruments

2017 ◽  
Vol 9 (3) ◽  
pp. 87
Author(s):  
AR Paterson
Keyword(s):  
Waste Water ◽  
South Africa ◽  
Sustainable Development ◽  
Market Failure ◽  
Water Discharge ◽  
Sustainable Growth ◽  
Successful Implementation ◽  
Significant Shift ◽  
Policy Paper ◽  
Environmental Objectives

There is growing global recognition that market-based instruments (MBI), such as environmentally-related taxes, levies and user-charges, are viable tools for facilitating environmental management and, ultimately, sustainable development. These instruments seek to correct market failure to value, or accurately value, environmental goods and services that consequently lead to environmental concerns being accorded insufficient consideration in everyday market activities.  South Africa has introduced various MBI, largely in the form of environmentally-related taxes pertaining to mining, agriculture, electricity supply, water supply, waste water discharge and various products such as fuel and plastic shopping bags. The primary rationale underlying the introduction of these instruments has been revenue generation. Government has, however, acknowledged that MBI have potential to achieve other objectives, namely to mould human behaviour, encourage more efficient resource use and improve actual environmental outcomes. In an effort to facilitate further debate on the issue, the National Treasury recently published a draft policy paper titled A Framework for Considering Market-Based Instruments to Support Environmental Fiscal Reform in South Africa. The Draft Policy Paper reflects a significant shift in fiscal policy and provides four broad tax reform options that could contribute towards meeting both fiscal and environmental objectives, namely: reforming existing environmentally-related taxes and charges in the transport and solid waste sectors; introducing new environmentally-related taxes in the electricity and waste water sectors; reforming legal aspects of non-environmentally-related taxes with perverse environmental incentives and creating incentives to improve environmental outcomes.  This article briefly considers each of the above options set out in the Draft Policy Paper by focusing on the following questions: Why has there been a shift toward the use of MBI to achieve environmental outcomes? To what extent are they used currently in South Africa? What are the options for extending their use in South Africa? What are the prerequisites for their successful implementation?

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