Design and construction of caverns for an underground sewage treatment plant, Hong Kong

1994 ◽  
pp. 117-135 ◽  
Author(s):  
M. A. Oswell ◽  
I. W. Farmer ◽  
B. W. L. Mak
Keyword(s):  
Hong Kong ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Design And Construction

Characterization of raw sludge, chemically modified sludge and anaerobically digested sludge in Hong Kong

1998 ◽  
Vol 38 (2) ◽  
pp. 25-32 ◽  
Author(s):  
C. W. Chu ◽  
C. S. Poon ◽  
R. Y. H. Cheung
Keyword(s):  
Hong Kong ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Chemical Properties ◽  
Primary Treatment ◽  
Digested Sludge ◽  
Total N ◽  
Chemically Modified ◽  
Anaerobically Digested Sludge

Chemically Enhanced Primary Treatment (CEPT) or Chemically Assisted Primary Sedimentation (CAPS) is being employed at the new sewage work on Stonecutters Island as part of the Strategic Sewage Disposal Scheme (SSDS) in Hong Kong. CAPS involves the use of chemical coagulants (such as lime or ferric chloride) to induce coagulation or flocculation and let these finely-divided particles form large aggregates (floc) so that they can settle out within a reasonable period of time. In this study, five sludge samples collected from different sewage treatment plants in Hong Kong were physically and chemically characterized. They were chemically modified sludge from Stonecutters Island (CAPS) raw sludge from Tai Po and Yuen Long Sewage Treatment Plant (STP) (rTP & rYL) and anaerobically digested sludge from Tai Po and Yuen Long STP (dTP & dYL). It was found that CAPS sludge was better than other 4 sludge samples in terms of settleability and dewaterability. CAPS sludge contained significant higher amounts (p<0.01) of extractable compounds than other sludges (except NO3− for dTP, NH4+ and PO43− for dYL). The concentration of total N and P in CAPS sludge were significantly higher (p<0.01) than other sludges (except dYL). The concentrations of total Cu, Pb, Ni, Cd, Cr and K in the CAPS sludge were also significantly higher (p<0.01) than other sludge samples. Most of the metals (Cr, Pb, Cr and Zn) in CAPS sludge were associated with the organically-bounded phase. It is concluded that there are significant differences in both physical and chemical properties between the chemically modified sludge and biological treated sludges.

Intra-day microplastic variations in wastewater: A case study of a sewage treatment plant in Hong Kong

2020 ◽  
Vol 160 ◽  
pp. 111535 ◽  
Author(s):  
Yaru Cao ◽  
Qi Wang ◽  
Yuefei Ruan ◽  
Rongben Wu ◽  
Luoluo Chen ◽  
...  
Keyword(s):  
Hong Kong ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant

Soft Soil Subgrade Vacuum Preloading Consolidation Deformation Analysis of Large Rigid Foundation

2015 ◽  
Vol 1095 ◽  
pp. 556-560
Author(s):  
Bi Hong Song ◽  
Chun Ming Wang ◽  
Shu Guang Wang ◽  
Jian Hua Chen ◽  
Lu Ke
Keyword(s):  
Calculation Method ◽  
Soft Soil ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Deformation Analysis ◽  
Rigid Foundation ◽  
Vacuum Preloading ◽  
Specific Calculation ◽  
Design And Construction

The large rigid foundation has a high requirement on subgrade consolidation deformation, especially the soft soil subgrade, of which the design and construction is very difficult. Through the analysis on subgrade treatment process of a sewage treatment plant in Zhejiang Province, this paper introduces the mathematical calculation model and the specific calculation method for treating the soft soil subgrade with the vacuum preloading method. The calculation results obtained has basically reflected the actual deformation process of the subgrade; it is a rational referential calculation method to guide the design and construction.

Hong Kong Underground Space Development and its Enlightenment for the Mainland

2018 ◽  
Author(s):  
Dexiang Zhang
Keyword(s):  
Hong Kong ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Underground Space ◽  
Urban Structure ◽  
Construction Methods ◽  
Rock Cavern ◽  
Transfer Station ◽  
Increasing Demand

<p>First, introduce the background of Hong Kong’s underground development and utilization, then, illustrate the ways on planning and utilizing underground space to meet the increasing demand in transit, commercial and pedestrian activities on the one hand, and the accommodation of environmentally-unfriendly public utilities on the other, specifically focusing on such aspects as cavern development, mass transit railway, tunnels, underground pedestrian walkways, shopping malls, new urban structure, special-purpose underground facilities (refuse transfer station, sewage treatment plant, explosives magazines). Also, highlight the planning issues and challenges faced in crowded and compact urban environment, including, e.g., adverse effect on environment, construction constraints, interference to existing underground facilities, limitations on construction methods, search for a consensus or compromise, planning and construction procedures, geotechnical engineer’s risk. Finally, sum up some points of enlightenment for the mainland to develop and utilize underground space as per Hong Kong experiences, namely, developing rock cavern with reference to Hong Kong experience; achieving sustainable development by initiating planning first; enhancing integrated development by making two good drawings; building combined utility gallery to satisfy development demands; the last but not the least, applying state-of-the-art technology to guide the planning and development.</p>

The survey on odor emission characteristics in a sewage treatment plant by using passive samplers

2014 ◽  
Vol 13 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Han-Soo Kim ◽  
◽  
Suk-Jun Lee ◽  
Yong-Jeong Lee ◽  
Sun-Tae Kim
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Passive Samplers ◽  
Emission Characteristics ◽  
Odor Emission

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operation

2008 ◽  
Vol 37 (2) ◽  
Author(s):  
Maciej Walczak
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Treatment Plants ◽  
Plant Operation ◽  
Treated Sewage ◽  
Microbiological Parameters ◽  
Microbial Indices

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operationThis paper reports the results of studies of microbiological changes in the water quality of the Vistula and Brda rivers after the opening of sewage treatment plants in Bydgoszcz. The study involved determining the microbiological parameters of water quality. Based on the results obtained, it was found that the quality of the water in both rivers had improved decidedly after the opening of the plants, although an increased number of individual groups of microorganisms was found at the treated sewage outlet from one of the plants.

Properties of Nocardiaform Actinomycetes Isolated from a Sewage Treatment Plant of Southern Part of Miyagi.

2000 ◽  
Vol 36 (4) ◽  
pp. 161-171
Author(s):  
KENITSU KONNO ◽  
NAOKI ABE ◽  
YOSHIRO SATO ◽  
KOJI AKAMATSU ◽  
MAKOTO ABE ◽  
...  
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant
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