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The following titles and abstracts of papers are submitted /presented
in recent years by our staffs.
Contributed to the seventh issue of Water Solutions and Technologies, October 2010
GHG emission reduction and its potential trading option by improving
sewage sludge treatment process. (in Japanese)
More than one-quarter of Greenhouse Gas (GHG) emission from sewerage system
in Tokyo is reportedly nitrous oxide (N2O) from incineration process of dewatered sludge, which is planned to be
greatly reduced by introducing sludge carbonization, gasification process
instead of incineration and catalytic decomposition of N2O. Although excess N2O reduction thus acquired cannot be traded in Tokyo Emissions Trading Scheme
(Tokyo-ETS) or EU-ETS market at present, sales revenues of offset credits
if any should be regarded as some temporary bonus. Smaller trading transactions
of regional or community base are mentioned as desirable, to reduce risk
of abnormally fluctuating trading price of global market and to return
the benefit of GHG emission reduction to customers in accordance with their
monetary contributions.
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Contributed to the sixth issue of Water Solutions and Technologies, July 2010
PFI schemes to promote biomass marketing opportunities at wastewater treatment plants. (in Japanese)
Organic waste from decentralized sewage treatment system as well as fish,
agriculture or any industrial processing might be co-treated with sewage
sludge at public wastewater treatment plants to draw out maximum potential
of biomass reuse with less cost, coupling some necessary pre-treatment.
Some model projects have just started under the public or private initiative
of finance and coordination. Adequate marketing process is the key issue
for any profitable project, avoiding the demand-supply mismatch of both
biomass feedstocks and products; private sector participation is suggested
to be essential by adopting a PFI or DBO scheme.
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Contributed to the fifth issue of Water Solutions and Technologies, April
2010
Successful strategies to change water tariff. (in Japanese)
Enhanced operational efficiency, improved working practices and resulted
overall customers' satisfaction are essential to discuss any change of
water tariff at municipal assembly. A strategy to reduce the watersupply
service charge taking down its surplus reserved for future investment in
order to offset the increase of wastewater service charge is sometimes
proposed but with few success, because domestic accounts of watersupply
and wastewater services are not consolidated and the latter is generally
accepted to be partly subsidized by the municipality. A rebating tariff
scheme for the increased water demand by industrial customers is suggested
to be applicable to increase the overall turnover.
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Contributed to the fourth issue of Water Solutions and Technologies, January
2010
How to improve the water supply and wastewater services provided by municipalities.
(in Japanese)
Bureaucratic aspects should be carefully eliminated in the municipal water
supply and wastewater services. Most users expect a variety of on-line
payment methods and 24 hours telephone services, but on-line payments are
often not available and potential users sometimes have no options for registration
except by visiting the offices of water utilities which open only during
daytime on weekdays. Private water companies as in England or gas supply
service providers are suggested to offer good examples for any service
improvement trial, and nonprofitness or publicness of every municipality
is proposed to be strategically pursued.
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Contributed to the third issue of Water Solutions and Technologies, October
2009
Charges and bills for water supply and wastewater services in France. (in Japanese)
The price for water supply service is regarded to be rather costly by more
than half of all queried customers in France, though as much as 85 per
cent of them have expressed their satisfaction with the service: the average
charge amounts to €3.07 per cubic meter in France for water supply
and wastewater service, which is 1.5 times higher than that of Japan. The
presented breakdown into every cost component of charge on each bill in
France as a means to keep the customers informed is suggested to enhance
the willingness to pay for and even overall satisfaction with water supply
and wastewater service.
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Contributed to the second issue of Water Solutions and Technologies, July 2009
Mutual ownership of water and sewerage assets - a model of Glas Cymru's
and a proposal by Yorkshire Water. (in Japanese)
All of the water and sewerage assets of Welsh Water (Dwr Cymru Cyfyngedig)
are owned by NPO-like holding company Glas Cymru Cyfyngedig for the benefit
of its customers after the takeover battle of Hyder in the late 1990s.
Separation of assets' ownership from operations and mutual ownership by
customers instead of stockholders must be an effective means for any privatized
public utilities to prevent takeover by any third party, and the establishment
of Glas Cymru did achieve its purpose, though it is in fact a mutual ownership
by representatives of Welsh Water. Proposed establishment of RCAM (Registered
Community Asset Mutual) to own Yorkshire Water Services Limited's assets
must have been a first and epoch making model of customers' mutual ownership
if put into practice, but unfortunately was rejected by OFWAT in 2000.
The cause and effect of Glas Cymru's case, as well as the reasons of rejection
by OFWAT are surveyed.
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Submitted to the Journal of Japan Water Works Association
Operations improvement options proposed through activity based costing analysis at water supply facilities under long-term operation and maintenance agreements. (in Japanese)
Operations improvement options are proposed based on activity based costing
analysis, at three water supply facilities which are operated under operation
and maintenance agreements for three years' duration. About twenty percent
of all personnel fees could be reduced by reorganizing the night shift
work schedule, in place of the present 24 hours' attendance of two personnel.
Introducing PDA (Personal Digital Assistant) devices, as well as establishing
a network of part-time workers for seasonal labors or emergency conditions
are also mentioned as applicable.
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Contributed to the Annual Technical Report FY2008, published by the Association of Water and Sewage Works Consultants Japan, April 2009
Topics from the revised Guideline for Preparing and Monitoring Long-Term
and Performance-Based O&M Outsourcing. (in Japanese)
Revised edition of the "Guideline for Preparing and Monitoring Long-Term
and Performance-Based Operation and Maintenance Outsourcing" was published
in June 2008 by the Japan Sewage Works Association. Background and concepts
of the revision, as well as the major additions and changes are outlined,
by a supporting staff of the editing task force.
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Contributed to the Journal of Sewerage, Monthly, Vol.33, No.5, April 2009
Prospects of privatization of domestic wastewater services. (in Japanese)
To privatize wastewater service is regarded to relieve the heavy burden
of related debt depreciation of domestic municipalities. The inter-communal
cooperation for setting up long-term operation and maintenance contracts
is referred to as the first and easiest choice, which offers the greater
opportunities of cost reduction for the bid-winners. Affermage or leasing
facilities is referred to as the second choice, when the future capital
investments are scarcely needed. Debt equity swap might be a supplemental
option, either through establishing public funds or through issuing bonds
not having a fixed redemption date but promising a fixed coupon payment
like the British consols. The nationalization model by IWK in Malaysia
and the joint-stock model of Berlin Water are also mentioned as impractical;
both of which require a series of amendments of domestic laws.
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Contributed to the first issue of Water Solutions and Technologies, April
2009
Fiscal contents of sewerage services on domestic municipalities' websites. (in Japanese)
Most domestic municipalities have set up their wastewater charges far
cheaper than the required level for recovering both the bond redemption
and maintenance costs, of which fact is not fully recognized by customers.
Disclosure of comprehensive financial information on sewerage services
is thus much needed to arouse public concern. Websites on sewerage services
provided by 754 cities are reviewed featuring fiscal contents and the best
fours are nominated for the superiority of their contents: the City of
Maebashi, the City of Kawasaki, the City of Yokosuka and the City of Kyoto.
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Presented at the 60th Annual Technical Conference on Water Works, Saitama/Japan, 20-22 May
2009
Audited matters and results for water supply authorities based on comprehensive
external audit contracts. (in Japanese)
Over 1,500 of both financial and managerial matters in domestic municipalities
have been audited by the comprehensive external auditors, appointed either compulsorily or optionally by mayors based on the amended
Local Autonomy Law in 1999, of which matters 66 are on water supply service.
Available 38 reports of these 66 audited matters were categorized with
the following result; most of the audits were focused on financial affairs,
checking out any misstatements or making sure of the accordance with the
accounting principle or relevant legal requirements, while comments or
opinions from technical aspects were scarcely found. Techno-financial matters
such as developed capital investment programmes or operations improvement
trials through inter-communal cooperation are recommended to be audited,
which consist of the important components of managerial affairs.
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Contributed to the journal Suido Koron, Vol.45, No.3, March 2009
Re-municipalized water supply service in Paris; its cause and effect. (in Japanese)
The City of Paris is now preparing to re-municipalize its water supply
service, in line with the expiries of the two affermage agreements of water
distribution in December 2009. The present concession holder of water production
Eau de Paris shall be reorganized as an entrustee to own, operate and manage
all the components of water asset in Paris. Being a monopolized 100 percent
subsidiary of the City and controlled by the City Council, the new Eau de Paris must endeavor to avoid any political influence impeding the
efficiency of the organization, while pursuing the least economy as a non-profit
service provider. Concession or affermage of the whole water supply service
is referred to as a better solution, as well as the joint-stock and holding
company model of Berlin Water or the mutual ownership and holding company
model of Welsh Water are referred to as options worthy of notice.
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Presented at the 43rd Annual Technical Conference on Sewage Works, Osaka/Japan,
25-27 July 2006
An estimate of cost reduction to be achieved through a long-term and performance-based
o&m contract. (in Japanese)
Achievable cost reduction was estimated before setting up a long-term
of up to five years and performance-based O&M (Operation and Maintenance) agreement of a WWTP, of which present capacity is about 50,000 cubic
ms per day. A series of dialogues with five prospective bidders indicate
that higher percentage of cost reduction could be expected with longer
duration of contract and wider range of project scope: maximum 11 percent
to be expected when five years of duration and with utilities-procurement
and sludge disposal attached to the ordinary O&M service. Effective
means of operations improvement is also suggested, including the reduction
of life cycle cost through preventive maintenance and of personnel expenses
through flexible staffing endeavor.
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Submitted to and presented at the 3rd International Conference on Project
Management (ProMAC 2006), Sydney/ Australia, 27-29 September 2006
A study of the communication management in a matrix organization.
The traditional paradigm of information processing in the managerial
organization theory has acknowledged the organization as “an aggregation
of individual who makes a decision”. Activities of the organization have
been managed through controlling members with disciplines and orders. The
design of matrix organization by Galbraith also follows this paradigm.
In this study the author classified the information processing activities
in the matrix organization of Japan Sewage Works Agency into 16 categories
and investigated. As a result of the cross analysis and the interviews,
it was proved that the Japan Sewage Works Agency have changed the official
communication channels in order to adapt the change in the organizational
environment. The author will discuss the fact that they acknowledged the
organization as “an aggregation of the member’s communication” and they
have managed the project effectively through the change of the communication
channels. |
Submitted to and presented at the 10th International Conference on Urban
Drainage (10th ICUD), Copenhagen/Denmark, 21-26 August 2005
Potentials of stored rainwater as an alternative water resource to meet
the increasing water demand: a case study. (PDF)
Detention/storage of rainwater instead of its quick removal is an effective
control measure for urban drainage. As well as its peak-cut effect, multi-purpose
use of stored rainwater is expected as an on-site water resource. Though
Japan is not an arid area (annual average precipitation is 1,718mm per
year) serious water supply shortage arises at times in some urban areas,
due to the heavily concentrated population or industrial activities and
the relatively small catchment area. Utilization of stored rainwater is
thus promoted in such areas, including Naha city, capital of Okinawa Island,
located in south-east end of Japan. A feasibility study was conducted at
Naha New Town, extending 2 square kms which was planned to be developed
near the center of Naha city, aiming at estimating the potentials of stored
rainwater to substitute for the water supply system to meet the water demand.
Based on day by day mass-balance calculation and cost-benefit analysis,
it is concluded that usage of stored rainwater shall be limited to domestic
use and 8.5 percent of water demand shall be substituted and total run-off
discharge of stormwater from Naha New Town shall be reduced by 67 percent
through storage and utilization.
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Presented at the 42nd Annual Technical Conference on Sewage Works, Tokyo/Japan,
26-28 July 2005
Optimum staffing trials based on activity based costing analysis in newly
merged municipalities. (in Japanese)
A new strategic management program for wastewater service was prepared
just before the expected merger of three small municipalities. The optimum
staffing and its corresponding operations improvement was proposed based
on the activity based costing analysis: 20 operating personnel instead
of the present 22 to be recommended; the necessary process improvement
to comprise of (a) establishing a standardized inspection method of sewer
laterals, (b) contracting out of data collection necessary for billing
beneficiary charges and (c) reorganizing the missions of both the head
office and branches. |
Presented at the 42nd Annual Technical Conference on Sewage Works, Tokyo/Japan,
26-28 July 2005
New framework of beneficiary charge suitable for rural municipalities and
its application. (in Japanese)
Traditional beneficiary charge for wastewater service has been billed
in proportion to the benefitted property size, but some adjustment is necessary
in rural communities to avoid extraordinarily high charge. Uniform charge
to every household is thus adopted in many rural municipalities that have
recently started providing wastewater services, but it also requires adjustment
in suburbanized communities to avoid the higher charges to newcomers who
own relatively small estates. A simulational study was conducted to develop
the proper adjustment in a suburbanized municipality with the following
conclusion: (a) the uniform charge plus the proportional charge up to a given size ( e.g. 800 square meters) of benefitted property; (b) liable
person shall be identified per each sewer lateral; (c) a liable representative
person shall be appointed where a single sewer lateral is shared by more
than one owner of benefitted property which is often the case in rural
communities.
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Presented at the 56th Annual Technical Conference on Water Works, Yonago/Japan,
18-20 May 2005
Control of raw water contamination risk for water supply service using
pollutant release and transfer register database. (in Japanese)
23 of all 50 substances listed in the Japanese Drinking Water Quality
Standards are registered in PRTR database, of which six substances are
selected to assess the applicability of PRTR data to control the raw water
contamination risk: selenium and boron from metals; phenols, cis-1,2-dichloroethylene,
trichloroethylene and tetrachloroethylene from organic compounds. Selenium,
phenols, cis-1,2-dichloroethylene, trichloroethylene and tetrachloroethylene
can easily be traced back to specific effluents of like chemical industry
or wastewater treatment plants, hence it is important to identify the potential
on-site sources while monitoring the corresponding PRTR data. Boron is
traceable to various industrial effluents of which potential sources are
not easy to be identified, hence the utilization of PRTR data is limited
in this case.
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