scholarly journals Full-scale practice of domestic wastewater source separation and collection in a semicentralized treatment system: a case study

2018 ◽  
Vol 78 (10) ◽  
pp. 2193-2203 ◽  
Author(s):  
Xueli Ren ◽  
Hongbin Chen ◽  
Yong Cheng ◽  
Luxue Wu ◽  
Haixin Jiang
Keyword(s):  
Urban Areas ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Full Scale ◽  
Office Building ◽  
Practical Significance ◽  
Public Building ◽  
Future Design ◽  
System A

Abstract Semicentralized supply and treatment systems (SCSTSs), which can realize water, nutrition, and energy recycling via separate water supply and discharge systems, have been developed for fast-growing urban areas. The world's first full-scale SCSTS was implemented in Qingdao in China. Greywater (GW) and blackwater (BW) are collected and treated separately, but the parallel setting of the BW and GW pipelines means that connection mistakes can easily occur. Taking Qingdao as an example, this article analyzes the occurrences of BW and GW pipeline misconnections and the changes in influent pollutants, to assess the feasibility of separating domestic sewage at the source. The misconnection rates were estimated by comparing the measured values with the theoretical values. The results show that cross-connections occurred in some buildings, and the average misconnection rates were 31.9%, 15.2%, 60.6%, and 0.2%, respectively, in hotels, residences, an office building, and a public building. The overall misconnection rate in the SCSTS was 27.9%. These findings suggest that measures should be taken to avoid or reduce misconnections. This study can provide a reference for the future design and construction of SCSTSs and has important practical significance for protecting the environment.

Green Urban Public Bikes Rental System: A Case Study of Taipei YouBike

2013 ◽  
Vol 723 ◽  
pp. 968-975
Author(s):  
Hui Hua Yang
Keyword(s):  
Urban Areas ◽  
System Analysis ◽  
Clear Indication ◽  
The Public ◽  
Public Transport System ◽  
System A ◽  
Actual Experience ◽  
Taipei City

Public bikes rental system is an innovative scheme of rental bicycles in urban areas and can be seen as part of the public transport system. This study investigates the users of Taipei YouBike rental system, analysis their intention and behaviors, pre-expectation and actual experience on satisfaction. The result indicates that the users were mostly from long term annual fee commuters. The result also reveals distinct discrepancies between pre-expectation and actual experience, especially in distributes of safety routes and environments and clear indication of signs on bike routes. The findings can be used for Taipei City to improve the urban bicycle program and make more effort to develop safety cycling infrastructures and amenities.

PROBLEM IDENTIFICATION OF DOMESTIC WWTP OFFICE BUILDING AND ALTERNATIVE TO OVERCOME THEM (CASE STUDY : PT. USAHA GEDUNG BDN, JAKARTA)

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Petrus Nugro Rahardjo ◽  
Wahyu Widayat
Keyword(s):  
Treatment Plant ◽  
Environmental Parameters ◽  
Domestic Wastewater ◽  
Quality Standards ◽  
Office Building ◽  
Surface Load ◽  
Processing Unit ◽  
Problem Identification ◽  
Domestic Wastewater Treatment

In general, the main problem of domestic wastewater treatment plant (WWTP) for office buildings in Jakarta is the incompatibility between the surface load of wastewater and the capacity of WWTP. At the beginning a capacity of WWTP is already predetermined and corresponding to the rate of wastewater generated. But because of the demands of the means for the benefit of various business, so that the capacities of the office building should be developed. This case occurred on PT. Usaha Gedung BDN. Four environmental parameters, namely TSS, Ammonia, Grease & Oil and COD, produced from the WWTP still exceeded the allowable quality standards. Therefore PT. Usaha Gedung BDN immediately needs WWTP capacity development plan which is adequate. Various types of technology have been widely available and ready to be used to overcome the problems of the WWTP. But on this occasion it is advisable to develop the existing WWTP facilities by adding a new WWTP unit. The first WWTP is functioned as the preliminary processing unit and the new WWTP will become an advanced processing unit. The use of a combination of anaerobic-aerobic biofilter will be relied upon to reduce pollutants that can qualify water quality standards in accordance with applicable regulations.keywords : problem identification, domestic wwtp, advanced processing

scholarly journals Examining the Land Use Act of 1978 and Its Effects on Tenure Security in Nigeria: A Case Study of Ekiti State, Nigeria

2019 ◽  
Vol 22 ◽  
pp. 1-34
Author(s):  
Kehinde Hassan Babalola ◽  
Simon Antony Hull
Keyword(s):  
Land Use ◽  
Rural Areas ◽  
Urban Areas ◽  
Single Case ◽  
Rural Poor ◽  
Tenure Security ◽  
Land Registration ◽  
System A ◽  
Ownership Of Land

The Land Use Act of 1978 (LUA) has failed to achieve some of its objectives. The rural poor and the vulnerable are those most affected. The failure is ascribed to problems inherent in the Act and poor implementation. This paper discusses the effect of the LUA on the customary ownership of land and its effect on the tenure security of the rural poor. Using a conceptual framework for guiding cadastral systems development, the critical areas of the LUA as pertains to tenure security are analysed for the degree of their success, sustainability, and significance. The framework looks at the underlying theory, the drivers of change, the change process, and the land administration system. A mixed methodology approach was adopted for the study, using a single case study. Three groups of respondents contributed to the study: land professionals, civil servants and students. The study found that securing title to land is difficult, compensation provisions need to be reviewed, formal land registration is not in the interest of the poor, land is not available at an affordable rate, land speculators are still active in Nigerian land markets, the composition of the two committees is inadequate, and the refusal to grant certificates to people below the age of 21 is age biased. It further revealed that the power granted to the governor is enormous and unnecessary. The findings showed that the LUA is both effective in some areas and dysfunctional in others. This is because of the age of the Act and the lack of a pro-poor policy focus. Based on these findings recommendations were made, including that a new policy be enacted that includes pro-poor policies and customary laws. The LUA is found to be useful in urban areas, but not in solving land-related problems in rural areas. This study provides an understanding of the legal holding of land in Nigeria.

Natural gas engine driven heat pump system – a case study of an office building

2020 ◽  
Vol 17 (8) ◽  
pp. 476-487
Author(s):  
Altamash Ahmad Baig ◽  
Farshad Kimiaghalam ◽  
Rakesh Kumar ◽  
JuanLi (Bess) Ma ◽  
Alan S. Fung
Keyword(s):  
Natural Gas ◽  
Heat Pump ◽  
Office Building ◽  
Pump System ◽  
Heat Pump System ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
System A

Prospects for a self-sustainable sewage treatment system: A case study on full-scale UASB system in India's Yamuna River Basin

2006 ◽  
Vol 80 (3) ◽  
pp. 198-207 ◽  
Author(s):  
Nobuyuki Sato ◽  
Tsutomu Okubo ◽  
Takashi Onodera ◽  
Akiyoshi Ohashi ◽  
Hideki Harada
Keyword(s):  
River Basin ◽  
Sewage Treatment ◽  
Full Scale ◽  
Treatment System ◽  
Yamuna River ◽  
System A ◽  
Sewage Treatment System

scholarly journals Impacts of onsite greywater reuse on wastewater systems

2017 ◽  
Vol 75 (8) ◽  
pp. 1862-1872 ◽  
Author(s):  
Roni Penn ◽  
Manfred Schütze ◽  
Jens Alex ◽  
Eran Friedler
Keyword(s):  
Urban Areas ◽  
Process Model ◽  
Field Experiments ◽  
Wastewater Treatment Plants ◽  
Domestic Wastewater ◽  
Sewer Systems ◽  
Case Study Site ◽  
Wastewater Systems ◽  
Greywater Reuse

Together with significant water savings that onsite greywater reuse (GWR) may provide, it may also affect the performance of urban sewer systems and wastewater treatment plants (WWTPs). In order to examine these effects, an integrated stochastic simulation system for GWR in urban areas was developed. The model includes stochastic generators of domestic wastewater streams and gross solids (GSs), a sewer network model which includes hydrodynamic simulation and a GS transport module, and a dynamic process model of the WWTP. The developed model was applied to a case study site in Israel. For the validation of the sewer simulator, field experiments in a real sewer segment were conducted. The paper presents the integration and implementation of these modules and depicts the results of the effects of various GWR scenarios on GS movement in sewers and on the performance of the WWTP.

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