Comparison of Domestic Sewage Treatment Status in Rural Areas of Suzhou and Kenya and Discussion on Process Optimization

2021 ◽  
Keyword(s):  
Process Optimization ◽  
Rural Areas ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Treatment Status

Survey of Rural Domestic Sewage Treatment Systems of Songjiang District in Shanghai, China

2012 ◽  
Vol 573-574 ◽  
pp. 511-515 ◽  
Author(s):  
Peng Huang ◽  
Yao Guang Guo ◽  
Xiao Yi Lou ◽  
Xue Wu Yuan ◽  
Shuang Jie Xu ◽  
...  
Keyword(s):  
Social Development ◽  
Constructed Wetland ◽  
Rural Areas ◽  
Field Survey ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Soil Infiltration ◽  
Shanghai City

Due to the relatively unprogressive economic and social development of Songjiang rural areas of Shanghai city in China, the degree of rural domestic sewage treatment was relatively weak and hysteretic. The rural sewage treatment systems of Songjiang district were investigated through field survey. Finally, the systems of soil infiltration-constructed wetland and combinatorial biofilter, with obvious advantages, were proposed to popularize in Songjiang rural areas more suitably.

scholarly journals Tecnologias descentralizadas apropriadas para tratamento de esgoto doméstico em áreas rurais

ForScience ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. e00995
Author(s):  
Mariza Silva Bitarães Dias ◽  
Alex Cardoso Pereira
Keyword(s):  
Rural Community ◽  
Rural Areas ◽  
Rural Families ◽  
Sewage Treatment ◽  
Minas Gerais ◽  
Domestic Sewage ◽  
Local Conditions ◽  
Hydrographic Basin ◽  
Water Courses

A ausência de sistemas de tratamento de esgoto doméstico é uma das principais causas de insalubridade e degradação ambiental, além de ser uma forte ameaça à segurança alimentar das famílias rurais brasileiras. O estudo teve como objetivo fornecer subsídios para a elaboração de um programa de implantação de tratamento de esgoto doméstico na área da microbacia hidrográfica do Córrego do Mato, situado na comunidade rural São Braz, Simonésia, Minas Gerais. Foi investigada a situação do abastecimento de água e do esgotamento sanitário de 67 domicílios. Foi encontrado um cenário preocupante em relação à disposição final do esgoto doméstico, sendo que 96% dos domicílios estão em situação inadequada - disposição in natura em cursos d’água ou fossas rudimentares. Foram propostas alternativas adequadas para o tratamento do esgoto doméstico de acordo com as necessidades e condições locais da área de estudo. As alternativas escolhidas são tecnologias sociais e ecológicas com replicação e já implantadas em outras localidades rurais. Palavras-chave: Águas residuárias. Desenvolvimento rural. Bacia hidrográfica. Decentralized technologies appropriate for treating domestic sewage in rural areas: case study for a rural community in Simonesia - Minas Gerais Abstract The absence of domestic sewage treatment systems is one of the main causes of unhealthy and environmental degradation, in addition to being a strong threat to the food security of Brazilian rural families. The study aimed to provide subsidies for the elaboration of a program for the implementation of domestic sewage treatment in the area of the watershed of the Córrego do Mato, located in the rural community of São Braz, Simonésia, Minas Gerais. The situation of water supply and sanitation for 67 households was investigated. A worrying scenario was found in relation to the final disposal of domestic sewage, with 96 % of households being in an inadequate situation - in natura disposal in water courses or rudimentary cesspits. Appropriate alternatives have been proposed for the treatment of domestic sewage according to the needs and local conditions of the study area. The alternatives chosen are social and ecological technologies with replication and already implemented in other rural locations. Keywords: Wastewater. Rural development. Hydrographic basin.

scholarly journals Development and application of biogas project for domestic sewage treatment in rural China: opportunities and challenges

2017 ◽  
Vol 7 (4) ◽  
pp. 576-588 ◽  
Author(s):  
Shikun Cheng ◽  
Mingyue Zhao ◽  
Heinz-Peter Mang ◽  
Xiaoqin Zhou ◽  
Zifu Li
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
Chinese Literature ◽  
Rural China ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Government Support ◽  
Wastewater Management ◽  
Development Goals ◽  
Low Efficiency

Abstract The biogas project for domestic sewage treatment (BPDST) is considered a promising facility for wastewater management in rural areas of China. This paper explores previous experimental works, cost analysis, and BPDST structure and design based on Chinese literature. Opportunities for developing decentralized or neighborhood-based BPDSTs include fulfilling Millennium Development Goals (MDGs) and Sustainable Development Goals (SDGs), the water pollution situation and deficiency of wastewater treatment facilities, the advantages of BPDSTs compared with centralized sewage plant, government support and policy drive for rural wastewater treatment, and reuse demand for resources. Meanwhile, challenges faced are emphasized as follows: uncertain responsibility for BPDSTs under different governmental departments restricts BPDST development and should be specified; uncertain effluent quality due to low efficiency of nutrient removal requires aerobic post-treatment to some extent; rural environmental awareness is still low and should be heightened; more funds should be invested in R&D for improvement of technology innovation; more reuse and resource recovery elements should be considered during implementation; follow-up services are lacking and should be improved; and BPDST maintenance should be trained. This paper could provide valuable reference for other developing countries.

Development and Evaluation of a Partitioned Upflow Anaerobic Sludge Blanket (UASB) Reactor for the Treatment of Domestic Sewage from Small Villages

1999 ◽  
Vol 40 (8) ◽  
pp. 107-113 ◽  
Author(s):  
Carlos Augusto L. Chernicharo ◽  
Marcílio dos Reis Cardoso
Keyword(s):  
Rural Areas ◽  
Low Cost ◽  
Sewage Treatment ◽  
Field Evaluation ◽  
Domestic Sewage ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Attractive Alternative ◽  
Improved Performance

This paper presents the development and field evaluation of a partitioned UASB reactor, conceived for the treatment of domestic sewage from small villages and areas with large variation of the daily flowrate. In such situations, conventional single compartment UASB reactors are submitted to very extreme hydraulic conditions, that can disturb the behaviour of the treatment system. In the partitioned reactor, which is constituted of three digestion compartments, three gas separation devices and a single settler compartment, an adequate distribution of the variable incoming wastewater into one, two or three digestion chambers, allows the establishment of more stable up flow velocities and less occurrence of dead zones. As a result, a better contact between substrate and biomass can be achieved and an improved performance of the system can be expected. The partitioned UASB reactor was evaluated during a period of 16 months of continuous operation. The system presented a vary good performance during most of the operational period, showing very high efficiencies when the reactor was operated at a HRT of 7.5 hours. In this phase, the unit presented COD removal efficiencies around 80% and an average SS concentration in the final effluent of 32 mgSS/L. The research is still going on, focussing on the evaluation of the system under higher hydraulic loads and on the assessment of sludge activity and dehydration potential. Due to the operational simplicity and low cost of the system, it is believed that this type of reactor can become a very attractive alternative for domestic sewage treatment in small villages, particularly in Brazil where the number of rural areas with wastewater treatment is negligible.

scholarly journals Performance of a Novel Decentralised Sewage Treatment Reactor

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Dong Sheng Shen ◽  
Bao Cheng Huang ◽  
Hua Jun Feng ◽  
Bo Zhao ◽  
Jiang Ming Zhao ◽  
...  
Keyword(s):  
Rural Areas ◽  
Suspended Solids ◽  
Impact Load ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Domestic Sewage ◽  
Pollutant Removal ◽  
Surface Load ◽  
Dissolved Oxygen Concentration ◽  
Removal Efficiencies

A novel decentralised sewage treatment reactor (DSTR) for treating domestic sewage in rural areas was designed and investigated. The reactor was started aerobically after inoculation with biomass; the amount of initial mixed liquid suspended solids was 1.5 g/L. Oxygen was supplied to the reactor and the dissolved oxygen concentration was maintained at 1.3 ± 0.2 mg/L. The pollutant removal performance was investigated, and the average removal efficiencies of total chemical oxygen demand (TCOD),NH4+-N, suspended solids, and turbidity were 76%, 77.15%, 84.17%, and 83.93%, respectively. The DSTR exhibited good performance compared with the traditional activated sludge (AS) reactor. The resistance to impact load of the DSTR was superior to that of the AS reactor during surface load experiments. During the 120 days of operation, no sludge bulking was observed. The DSTR effluentNH4+-Nand TCOD levels were a little higher than those for the AS reactor, but the disparity was not major.

Management of Water Cycle: An Approach to Urban Ecology

1992 ◽  
Vol 27 (2) ◽  
pp. 221-238 ◽  
Author(s):  
W. Ripl
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Water Cycle ◽  
Cooling System ◽  
Thermal Power ◽  
Sewage Treatment ◽  
Balance Sheet ◽  
River System ◽  
Soil Restoration ◽  
Environmental Damage

Abstract Densely populated urban areas, which have developed over the last century, depend heavily on centralized water supply, sewage treatment plants, and hydroelectric or thermal power generation with vast demand of cooling water. Considerable areas have been drained or sealed, and the short-circuited water cycle has been distorted. Large rivers have been converted to shipping canals with the permanent risk of accidental pollution. Technical means such as sewage treatment, air filters, emission control and lake and soil restoration measures have contributed to correct the environmental damage. However, a balance sheet for irreversible matter losses (mainly base cation charges) from the urbanized areas and the surrounding landscape into the sea shows ever-increasing trends. These losses are destabilizing the ecosystems. In this paper, management of the water cycle in urban areas, together with the coupled matter cycles, is discussed. Particular reference is given to Metropolitan Berlin, with a network of shipping canals, which move biologically treated waste, containing base cations and nutrients to the surrounding rural areas. This could create manageable productive wetlands and re-establish soil fertility. At the same time, the natural cooling system close to the urban areas will be improved by providing more areas with permanent vegetation. In addition, reduction of the present large oscillations of the groundwater table, resulting from groundwater pumping and its recharge with less polluted surface water, is contemplated. The widely used shoreline infiltration of the Havel River should then be eliminated and the severe damage of the littoral vegetation in large sections of the Havel River system be avoided.

Sewage Treatment in Helophyte Beds–First Experiences with a New Treatment Procedure

1987 ◽  
Vol 19 (10) ◽  
pp. 1-10 ◽  
Author(s):  
K. Bucksteeg
Keyword(s):  
Waste Water ◽  
Rural Areas ◽  
Root Zone ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Uptake Capacity ◽  
Humid Climate ◽  
Climate Conditions ◽  
Trickling Filters ◽  
Operation Conditions

Waste water treatment in helophyte beds under humid climate conditions has been favoured by some German ecologists for some years. The idea is to cause waste water to flow horizontally through the root zone of helophytes to achieve satisfactory effluent properties. There exist many highly different proposals regarding the choice of soil and helophytes to be applied, bed area, design of inlets and outlets and operation conditions. A few plants have been operated in practice for some years. It appears that clogging is one of the main problems occurring in these plants. The hydraulic uptake capacity of soil is discussed in Darcy's law. Comparisons with observations of plants in operation are drawn. The interactions between soil properties, its uptake capacity, BOD5-, COD-, N- and P-reduction are evaluated. The effluent results of helophyte beds are compared with those of low-loaded trickling filters and of ponds used for sewage treatment in small villages in rural areas of Germany. It has been proved that the total construction costs of sewage treatment plants with helophyte beds used as the biological stage are higher when compared with those of conventional plants in general.

Sludge Treatment and Disposal Systems for Rural Areas in Germany

1993 ◽  
Vol 27 (9) ◽  
pp. 159-171 ◽  
Author(s):  
Eberhard Steinle
Keyword(s):  
Sewage Sludge ◽  
Rural Areas ◽  
Public Awareness ◽  
Sewage Treatment ◽  
Treatment Needs ◽  
Sludge Treatment ◽  
Sewage Treatment Plants ◽  
Sewage Purification ◽  
Treatment And Disposal ◽  
Nitrogen Phosphorus

First an overview of the systems currently in use and being discussed for sludge treatment is presented will) particular emphasis on distinguishing between the object of the system (conditioning objective of the various phases in the system) and a system concept (concept of various phases of the system in sequence to attain the disposal objective). More detailed information is given as to the salient systems as used with smaller sewage treatment plants in rural areas, such as digestion, dewatering, hygienization, composting and thermal drying. A further item of discussion is how sludge treatment influences the sewage treatment process. For the critical emissions (nitrogen, phosphorus) demanded in Germany, and thus for the degree of sewage treatment required, the load of the sewage treatment system resulting from sludge treatment needs to be taken into account. Accordingly, operation of sludge treatment and sewage purification must always be harmonized. The extent of these return loads also limits the spatial centralization of the system phases; this applies in particular to smaller sewage treatment plants in rural areas. In conclusion, an attempt is made to present a perspective for the agricultural utilization of such sludge in Germany. Since the critical values for emissions have been further tightened by new regulations, thus considerably elevating the associated sophistication of monitoring techniques, it is to be expected that the use of sewage sludge in agriculture will also be further reduced in rural areas, especially since public awareness of emission control has considerably reduced the acceptance of sewage sludge as fertilizer.

Treatment of Rural Domestic Sewage by Solar Ozonic Ecological Sewage Treatment Plant

2014 ◽  
Vol 955-959 ◽  
pp. 3393-3399 ◽  
Author(s):  
Wei Zheng ◽  
Yan Ming Yang ◽  
Yun Long Li ◽  
Jian Qiu Zheng
Keyword(s):  
Municipal Wastewater ◽  
Operating Cost ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Sewage ◽  
Design Parameters ◽  
Small Scale ◽  
Municipal Wastewater Treatment ◽  
Average Percentage

The process technique and design parameters of project of Solar Ozonic Ecological Sewage Treatment Plant (short for SOESTP) which consists of anaerobic reactor, horizontal subsurface flow (HSSF) constructed wetlands(CWs) and the combination of solar power and ozone disinfection are described, the paper further examines the removal efficiency for treating rural domestic sewage, running expense and recycling ability of product water. The results show that the average percentage removal values of CODcr，BOD5，SS，TN，NH3-N，TP range from 95.6% to 98.0%, 96.0% to 98.7%, 93.1% to 96.1%, 97.0% to 98.9%, 96.9% to 99.5%, 98.2% to 99.6%, respectively, the reduction of fecal coliform (FC) reaches 99.9%, the effluent quality meets the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（GB18918-2002）. The running cost of SOESTP is 0.063yuan/ m3, saves much more than traditional sewage treatment, and the ozone water obtained from the reservoir will be an ideal choice for disinfection .The system has characteristics of easy manipulation, low operating cost, achieving advanced water, energy conservation and environment protection, is thought to be very suitable for use as the promotion of rural small - scale sewage treatment.

scholarly journals Study on technical standard of small complete domestic sewage treatment plant

2021 ◽  
Vol 766 (1) ◽  
pp. 012076
Author(s):  
Huang Jin ◽  
Zhang Xiaoxin ◽  
Sun Youfeng ◽  
Huang Xia ◽  
Wang Guanjun
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Sewage ◽  
Technical Standard
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