prc pda: sludge beneficial uses (midterm report)

8/9/2019 PRC PDA: Sludge Beneficial Uses (Midterm Report)

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W ATER FINANCING P ARTNERSHIP F ACILITY PILOT AND DEMONSTRATION ACTIVITY

PRC-PILOT STUDY ON BENEFICIAL USE OF SLUDGE

MID-TERM REPORT

PREPARED FOR

THE ASIAN DEVELOPMENT B ANK M ANILA, PHILIPPINES

BY

WUHAN URBAN DRAINAGE DEVELOPMENT CO., LTD

WUHAN, HUBEI, PRC

30 M AY 2009

The views expressed in this paper/presentation are the views of the author and do not necessarilyreflect the views or policies of the Asian Development Bank (ADB), or its Board of Governors, or thegovernments they represent. ADB does not guarantee the accuracy of the data included in this paperand accepts no responsibility for any consequence of their use. Terminology used may notnecessarily be consistent with ADB official terms.



Wuhan Urban Drainage Development Co. Ltd. PDA: Beneficial Use of Sludge

1 Mid-Term Report, 30 May 2009

TABLE OF CONTENTS

Table of Contents ..................................................................................................... 1

SECTION 1 INTRODUCTION .................................................................................. 1

1.1 Project Background .................................................................................... 1

1.2 Objectives and Scope of the PDA .............................................................. 2

1.3 Implementation Schedule ........................................................................... 3

SECTION 2 METHOD and preliminary achievement ............................................ 4

2.1 Technical Principle for the Study ................................................................ 4

2.2 The Conclusion of Bench-Scale Study ....................................................... 4

2.3 General Physical Progress and fruit ........................................................... 5

2.3.1 Pilot Study Facility System Design .................................................... 6

2.3.2 Pilot Study Facility Installation/Construction ...................................... 8

2.3.3 Protein Extraction .............................................................................. 9

2.3.4 Laboratory Analysis of Protein and Hydrolysis Residue .................. 11

2.3.5 Sludge Hydrolysis Residue Gardening Application ......................... 15

2.3.6 Issues Identified .............................................................................. 15

SECTION 3 PROJECT MANAGEMENT PROGRESS .......................................... 16

3.1

Project Management Structure ................................................................. 16

3.1.1 Background ..................................................................................... 16

3.1.2 Responsibilities ............................................................................... 17

3.1.3 The tasks undertaken ...................................................................... 18

3.2 The Work Progress ................................................................................... 18

3.3 WFPF Funds Utilization ............................................................................ 20

3.3.1 Contract Awards and Expenditure ................................................... 21

3.3.2 Disbursement .................................................................................. 22

3.4 Issues Identified ........................................................................................ 22

3.4.1 Project Planning .............................................................................. 23

SECTION 4 NEXT STEP WORK PLAN ................................................................ 23

4.1 Perfect the Achievement of Pilot Study......................................................... 23

4.2 Remedy Actions to Issues Identified ......................................................... 23

4.3 Field Works ............................................................................................... 24

4.3.1 Gardening Record ........................................................................... 24

4.4 End Users Survey ..................................................................................... 24





4.4.1 Survey Plan and Questionnaire Design ........................................... 24

4.4.2 Survey Implementation .................................................................... 24

4.4.3 Financial Viability Study .................................................................. 24

4.5

Project Management................................................................................. 24

4.5.1 General Project Management ......................................................... 24

4.5.2 WFPF Funds Utilization ................................................................... 25

4.5.3 Remedy Actions to Issues Identified ............................................... 25

APPENDIX A UPDATED IMPLEMENTATION SCHEDULE ................................... 26

APPENDIX B UPDATED STAFFING SCHEDULE .................................................. 27

APPENDIX C STATEMENT OF EXPENDITURES .................................................. 28

APPENDIX D SLUDGE MEASURING AND ANALYSIS REPORT ......................... 29





SECTION 1 INTRODUCTION

1.1 Project Background

ADB is currently supporting serials of Wuhan wastewater management project,

including ADB Financed PhaseⅠ (Loan No.1996-PRC): wastewater management,

capacity construction and water quality modeling; ADB Financed Phase Ⅱ (Loan

No.2240-PRC): storm water management, wastewater management, capacity

construction and sludge management. Also, Wuhan is currently preparing a new

project for the solid waste and sludge management (ADB Financed Phase Ⅲ ).

There are 10 wastewater treatment plants (6 of which are financed by ADB) in

operation with total capacity of 1.59 million tons a day (1.0 million ton/day by ADB

Projects), and approximately 500~600 tons of sludge (water content is 80%) is

produced every day. At present, the sludge is transported and disposed at the landfill

plants. According to the Municipal Urban Development General Plan, the landfills in

the suburban area would be shutdown in the next several years and sludge disposal

would become a major issue for the Government as well as WWTPs. As a technical

preparatory work for above mentioned Phase Ⅲ project, Wuhan Urban Drainage

Development Co., Ltd (WUDDC) has conducted the initial bench-scale study and

experiment on beneficial use of sludge, including agricultural application as the

fertilizer, extracting the protein from the sludge and applying the residue in gardening.

The bench-scale study on extracting the protein from the sludge resulted in reduction

of water content in the sludge to 45% (from 80% in the dewatered sludge), thereby

the quantity of sludge to be disposed off at the landfill site or incineration plant would

be significantly reduced. The extracted protein from sludge could apply in the

bricking and fire fighting vesicant. So this study completely accord with the China’s

government requirements related to the sludge reduction, harmless, stability and

reuse.





Wuhan’s strategic location along the Changjiang, commitment to improve

wastewater management and achievement of Government environmental policies

provides an opportunity to invest in environmental management and boost the

wastewater service provision. Surveys show that both the poor and the non-poor are

broadly in support of environmental projects and consider improvements to their

living environment as a priority to improving their quality of life.

To expand the previous bench-scale study of beneficial use of sludge into a pilot-

scale project with WFPF support, WUDDC has applied the PDA fund through ADB

and finally signed the Letter of Agreement (LOA) with ADB on 15 September 2008.

1.2 Objectives and Scope of the PDA

The objective of this PDA is to conduct pilot-scale study following the bench-scale

study, the extracting protein liquid from urban WWTPs. This pilot study is also aimed

to the experiment of utilizing the residue applied to gardening earth, then setup

demonstrating garden.

This study aimed to support and achieve the national sludge disposal” reduction,

stability, harmless, reusing” policy, utilizing the sludge to produce the economical

hydrolyzed protein liquid, and the residue (biosolid) as the gardening earth beneficial

utilizing, then made the sewer sludge maximum utilized.

The PDA would undertake the following tasks:Task1: Wuhan WWTPs’ sludge content was conducted with totally measurement

and analysis, also clean up and analyze the lab data and achievements.

Based on the achievement and data， primarily select the pilot-scale

experiment technical parameter;

Taks2 Preparing the proper field achieves the process of extracting protein. It’s

supposed to transport 6~8 tons of packaged sludge from Nantaizi Lake

WWTP to the field, conduct the sludge pilot-scale test, under the high





SECTION 2 METHOD AND PRELIMINARY ACHIEVEMENT

2.1 Technical Principle for the Study

The characteristic of sludge from WWTP is mainly animalcules, protozoa, metazoans,

algae and few unknown organic and inorganic substances, and it contains high

content of protein (50% to 70% in dry sludge). Hydrolyzed protein (Peptide) can be

extracted from sludge through alkali hydrolysis. With the characteristic of froth, a lot

of foam can be generated after stirring and aeration from hydrolyzed protein, which

can be then formed into Protein Firefighting Powder through a serial process such as

adding stabilization liquid, antiseptic, antifreeze. The hydrolysis biosolids consist of

certain amount Nitrogen, Phosphorus, Kalium and other organic elements, which can

be utilized for gardening.

(a) The technology is to convert the sludge into two parts through hydrolysis:

hydrolyzed protein liquid and biosolids (70% volume reduction).

(b) Based on the high protein concentration feature of sludge, the technology

extracts protein, soluble organic and inorganic elements from the pollutants

in sludge, with high temperature, high pressure and high concentration of

alkali process. The final product can be applied as firefighting powder, which

is more environmental friendly than conventional chemical powders.

(c) During the process, unknown organic matters, pathogeny animalcules,

disease eggs are killed, so the there will be no biological pollution of the

residue. The residue contains only 45% water, which could be another

source of urban gardening and landscaping soil additive.

2.2 The Conclusion of Bench-Scale Study

To verify the theory as mentioned above, Hubei University has been working

together with WUDDC since 2006 and conducted bench-scale study with successful

results.

During previous bench-scale study, the following results have been achieved:





(a) Identification of basic characteristic of sludge: water content 75~85%

(b) Identification of hydrolysis time: 6 hours.

(c) Identification of alkali dosage: 30% lime

(d) Temperature optimization: 121 degree Celsius

Total 11 papers was published and 5 invention patents were awarded from the

bench-scale study.

2.3 General Physical Progress and fruit

To further identify the market application feasibility, a pilot study was proposed and

funded by WFPF through ADB, as mentioned in Section 1. The Consultants

developed the work plan from November to December 2008, which is detailed in the

Inception Report. This section summarizes the pilot study activities conducted since

project inception, and the issues identified.

Following the sites selection, pilot study approaches identification during the

Inception Stage, efforts on the following tasks have been made by the Consultantswith the support from WUDDC, Hubei University and relevant authorities:

(a) Pilot study facility system design

1. Protein extraction facility lease negotiation and process design;

2. Hydrolysis residue (biosolids) gardening site design;

(b) Pilot study facility installation/construction

1. Protein extraction equipment modification at WJSC;

2. Garden construction at Erlangmiao WWTP of WUDDC;

(c) Protein extraction

(d) Sludge hydrolysis residue gardening application and planting

(e) Laboratory analysis of protein and hydrolysis residue

(f) Issues identified





2.3.1 Pilot Study Facil ity System Design

Hubei University has extensive experience on the innovation of the technology

applied in this study and a well trained team during the previous bench-scale study, it

is therefore entrusted to develop the facility system design, with the services

integrated in the 2 consultancy agreements with Prof. Li Yadong and Prof. Li Haibo

on 5 November 2008.

Based on the system requirements described in Section 2.2.1, larger scale

experimentation is required for the pilot study in terms of protein extraction and

hydrolysis residue application. Investigations and initial agreements with WJSC and

Erlangmiao WWTP of WUDDC were conducted and reached during the inceptionstage, to (1) utilize the adequate steam and equipment in WJSC for hydrolysis and

(2) construct a garden in Erlangmiao WWTP for hydrolysis residue application.

(a) Protein Extraction (Hydrolysis) Facility Design:

The existing facility in WJSC is extracting protein from corps, which needs

modification for sludge hydrolysis. Upon the agreement entered with WJSC, one set

of protein extraction facility was leased to WUDDC for this pilot study, including:

a 10 tons Boiler

a 5m3 Hydrolysis Reactor

a 42m2 Frame Filer

Long tube concentrator

a 10m3 Filtration Buffer Tank

a 10m3 Storage Tank

a 15m3 Raw Material Mixing Tank

Feeding Pumps.

In accordance to the output of bench-scale study, the following protein extraction

process was developed:





Figure 2. Indicative Protein Extraction Process

(b) Garden Design:

To better compare the nutrient performance of hydrolysis residue with natural soil, a

brick partitioned, sand and crushed stone bedded garden is designed with a size of

6m by 3m, including 3 sections: a section at one end with 100% natural soil, asection at the other end with 100% sludge hydrolysis residue, and the other section

in the middle with natural soil and residue ratio at 50% to 50%.

There are 10 gardening plants selected based on the ecosystems in Wuhan area,

and with the characters of long term flowering and distinguished colors, such as

Festuca Arundinacea Schred, Chrysanthemum Flower, Salvia Splendens,

Catharanthus Roseus, Brassica Napus, Capsicum Annuum, Hibiscus Rosa-sinensis

L., Euphorbia Mili, Schefflera Octophylla etc.

Raw Sludge

HydrolysisReactor145

oC

Steam

Lime6%

Water40%

FrameFilter

Hydrolysis

Residue(42-45% Water)

LiquidProtein

Concentrated Liquid

Protein(Long Tube 19oBe)





Figure 3.

Festuca Arundinacea Schred

Figure 4.

Chrysanthemum Flower

Figure 5.

Salvia Splendens

2.3.2 Pilot Study Facil ity Installation/Construction

(a) Protein Extraction Facility Installation:

Due to the nature of available facility, the installation of protein extraction facility is

mainly adjustment and modification on the leased facility in WJSC, for the purpose of

this pilot study. Following the process design, the lease agreement was entered with

WJSC in February 2009 and the leased facility was made available in March 2009. It

was then cleaned and adjusted for protein extraction from sludge.

Figure 6. Boiler Pressure Adjustment Figure 7. Frame Filter Cloth Replaced

(b) Garden Construction:

The civil works of the garden construction in Erlangmiao WWTP was contracted to

Wuhan Kangxing Environmental Equipment Co., Ltd on 26 February 2009. The

construction works commenced in early March and completed in late March 2009.





The construction process was supervised by the property management team of

WUDDC and the representatives from the Working Group.

The biosolids was transported by WUDDC Production Department from storage site

at WJSC to Erlangmiao on 20 March 2009. Gardening soil preparation was done by

the Contractor on 25 March 2009. Then gardening grasses and flowers were

purchased on 20-25 April 2009.

Figure 8. Garden

2.3.3 Protein Extraction

Following the protein facility adjustment and modification in WJSC, 6 tons raw sludge

was transported by WUDDC Production Department from Nantaizihu WWTP on 18

March 2009. The protein extraction process was commenced on 19 March 2009 and

6 tons of raw sludge were consumed during the 2 days extractions. The end

products of the process are 900kg concentrated liquid protein (long tube 19oBe), 3

tons hydrolysis residue.





Figure 9. Unpacked Raw Sludge at

Nantaizihu WWTP

Figure 10. Packed Raw Sludge Unloading

at WJSC

Figure 11. Hydrolysis Process Figure 12. Hydrolyzed Sludge Liquid

Figure 13. Filtration Figure 14. Raw Protein Liquid Filtered





Figure 15. Concentrated Protein Liquid Figure 16. Hydrolysis Residue

Process parameters were identified during the process:

Hydrolysis time: 2 hours

Alkali dosage: 6% lime

Hydrolysis temperature: 145oC

Identification of protein content: 27%

Water content in the hydrolysis residue: 45%

Foaming performance of protein:

- foaming stability time: more than 4 hours;

- foaming capacity: 120 times in volume

Characteristics of protein concrete (brick):

- water absorption rate: <10%;

- Weight ratio: 450kg;

- intensity: 0.5Mpa.

2.3.4 Laboratory Analysis of Protein and Hydrolysis Residue

(a) Protein Analysis

Protein analysis was conducted by Huibei University Laboratory for this study, prior,

during and after the protein hydrolysis process. The concentration of protein was

measured by 756MC UV-VIS Spectrophotometer the calculation of protein





concentration in the dried sludge is through the equation: (Total protein / Total DS)

×100%.

The characteristics of the extracted protein are consistent with the result of Bench

Study.It is considered that the protein extracted can be used as the source of

firefighting protein powder, or protein concrete and brick, which needs further study

on its application.

(b) Hydrolysis Residue Analysis

The hydrolysis residue laboratory analysis ：

Identification of heavy metal ions: By Hubei Province Agricultural TechnologyInstitute

Identification of fertilizer concentration: By Hubei Province Agricultural

Technology Institute

The result of heavy metal analysis is in Table-1 below:

Table-1 Heavy Metal Content in the Hydrolysis Residue（mg/kg）

Heavy Metals Pb Cr Cd Hg As

Content in

the Sample42.6 112.3 0.32 1.42 8.29

Content

Limits in

GB4284-84:

Standard forPollutants

Control in

Sludge

Agricul tural

Appl ication

300 600 5 5 75

From the analysis result, the heavy metals content is far below the agricultural limits,





therefore deemed proper for gardening purpose, while saving space in landfill and

eliminating the sludge pollution problems.

Nutrients texts for both the sludge before hydrolysis and the hydrolysis residue were

conducted to compare the differences. The result of nutrients analysis is in Table-2

below:

Table-2 Nutrients Content in the Sludge and Hydrolysis Residue

NutrientsSludge before

HydrolysisHydrolysis

ResidueSample 1 Sample 2 Average

Total N (%) 2.26 2.62 2.44 0.46

Total P (%) 0.86 0.67 0.77 0.44

Total K (%) 0.60 0.84 0.72 8.78

Alkal i-hydrolyzed

Nitrogen (mg/kg)904.40 1083.95 994.18 70.60

Available

Phosphorous

(mg/kg)

37.62 32.20 34.91 68.60

Available

Potassium (mg/kg)764.60 432.50 598.55 95.90

Slow-release

Potassium (mg/kg)76.90 563.50 320.20 /

Available Copper

(mg/kg) 10.40 1.20 5.80 0.80

Available Zinc

(mg/kg)14.50 13.30 13.90 1.40

Available Iron

(mg/kg)115.20 227.40 171.30 7.50

Available

Manganese (mg/kg)70.90 65.70 68.30 8.20

Available 333.80 241.40 287.60 0.036





Magnesium (mg/kg)

Available Calc ium

(%)0.69 0.54 0.62 0.27

Available Sil icon(%)

0.06 0.10 0.08 0.012

Available Sul fur (%) 0.07 0.09 0.08 0.64

Available Boron

(mg/kg)0.60 0.92 0.76 0.13

Available

Molybdenum

(mg/kg)

2.50 3.04 2.77 0.72

Organism (%) 28.75 30.70 29.73 23.00

pH 7.66 7.53 7.60 13.10

It is noticed that the Total N is significantly lower in the hydrolysis residue than that in

the sludge from Nantaizihu WWTP, which indicates most N was extracted from the

sludge in the form of protein liquid.

The comparison also implies that the sludge from Nantaizihu WWTP has some level

of nutrients and the heavy metals content is also lower than the control limits for

agricultural application, however, it is considered not suitable as fertilizer. The

reasons are (1) the nutrients content in the sludge is not as high as normal fertilizers;

(2) direct application of sludge will cause odor problem; (3) continuous application

will cumulate heavy metals in crops and the downstream of food chain.

The hydrolysis residue is with certain level of nutrients content, which can beconsidered as biosolids to be mixed with natural soil for gardening application.

However, the result also shows the hydrolysis residue is of high pH, which may have

some impacts on the plants growth. Therefore, further study on neutralization of the

hydrolysis residue was conducted.

(c) Neutralization of Hydrolysis Residue

Most of plants are favoring the soil condition close to pH=7, therefore, the

neutralization of hydrolysis residue was designed as follows: (1) water dilution; (2)





mixture with garden soil; (3) mixture with natural soil; (4) piling for natural dilution by

rain water. Seeds germinating rate in the neutralized hydrolysis residue samples was

compared with that in the original hydrolysis residue. The detail is showed in

appendix.

The neutralization study shows:

- The water dilution is the most efficient way to neutralize the high pH

hydrolysis residue, but not practicable;

- The hydrolysis residue mixture with gardening soil or natural soil can

neutralize the high pH after around 15 days with a preferable ratio of

hydrolysis residue less than 50%;

- Piling hydrolysis residue outdoor with some rainfalls can neutralize in

about 6 days;

- Except for alkali favored seeds, all others can germinate better in the

above 4 neutralized soils than in the original hydrolysis residue.

Tentative conclusion was then made that the hydrolysis residue can be used as

biosolids after neutralization, and water can reduce the neutralization process time.

The garden was therefore designed with water spray system.

2.3.5 Sludge Hydrolysis Residue Gardening Appl ication

The planting of grasses and flowers in the garden was completed on 26 April 2009.

We planted the same 10 grassers and flowers in each section. The 10 grasses and

flowers were at the same conditions before planting in each section of the garden,

which will be monitored by the Consultants with a weekly basis in May, June and

July 2009. Following factors will be recorded during the monitoring for each grass

and flower for comparison: height, size and color of leaves, size of flowers.

2.3.6 Issues Identi fied

Since the PDA commenced in November 2009, several issues have been

encountered during the study, which are summarized below:





(a) The pilot scale equipment is too expensive to purchase under the

dedicated allocation of PDA budget, so is the system operation space

required;

(b) Due to the budget reason as above, the PDA is only capable to conduct

the pilot scale study on protein extraction and hydrolysis residue

gardening application, while leaving the exploration of protein application

for future study;

(c) The hydrolysis residue gardening application proceeded with flowers

purchased from market rather than seeds, which may cause the

comparison among different soils not very distinct.

SECTION 3 PROJECT MANAGEMENT PROGRESS

3.1 Project Management Structure

3.1.1 Background

As mentioned in Inception Report, WUDDC established a working group comprising

people from management and relevant departments of WUDDC, which will be

supported by the consultants and specialists engaged for the Project. The key

representatives from the WUDDC are currently implementing the loan project, who

will act as key members of the working group for this PDA. The working group

composition is shown below:

Organization Name Title

Working

Group

from

WUDDC

Mr. Wang Changqing GM, Director of PDA Working Group

Mr. Tian Zhongkai Chief Engineer, Technical Advisor of Working

Group

Mr. Gu Jianxin Deputy GM, Executive Director of Working

Group

Consultants Mr. Tommy Zhang Team Leader, International Wastewater





Engineering Specialist

Mr. Li Yadong Professor, Hubei University, Domestic

Wastewater Engineering and Sludge Disposal

Specialist

Mr. Li Haibo Professor, Hubei University, Domestic

Wastewater Engineering and Sludge Disposal

Specialist

Ms. Liu Xiaoyan Head of Chief Engineer Office, Assistant

Researcher

Ms. Li Yan Assistant Researcher

Ms. Wang Haibo Secretary, Translator

Mr. Zhong Hao Secretary and Translator

3.1.2 Responsibilities

The responsibilities of each member of the working group were described in the

Appendix A of Inception Report.

During the reporting period, responsibilities variation and breakdown were made for

the Working Group from WUDDC, with the following update:

Name Title Responsibi lity

Mr. Tian

Zhongkai

Chief Engineer,

Technical Advisor

of Working Group

responsible for day-to-day technical

management of the Pilot Study and

coordination with Consultants.

Mr. Gu Jianxin Deputy GM,

Executive

Director of

Working Group

responsible for liaison with ADB for project

management.





3.1.3 The tasks undertaken

The tasks undertaken during the Inception by the Team include a review of project

documents and previous bench-scale study output to ascertain the current status of

the project, conduct interviews and meetings with WUDDC and the relevant

agencies to collect information and establish working relationships, selection of

sludge from Nantaizihu WWTP and pilot study site at WJSC, design development of

pilot-scale protein extraction facility and preparation of Inception Report.

The tasks conducted since the inception by the Team consist of meetings with

relevant organizations during the design of pilot-scale sludge protein extraction

facility and gardening facility; installation and commissioning of the facilities,operation; packaging and transporting the sludge, protein extraction, laboratory

analysis of protein extracted and the hydrolysis residue, garden construction and

demonstration, reporting.

3.2 The Work Progress

Since the project inception on 26 November,2008, with the support of work

group, the consultants have undertaken the following task:

1) The Fertilizer Monitor Center of Nation Agriculture Department was commission

to totally measure and analyze the sludge from the following 7 WWTPs:

Nongwangzui WWTP, Tangxunhu WWTP, Huangjiahu WWTP, Nantaizihu

WWTP, Sanjintan WWTP, Erlangmiao WWTP and Sahu WWTP, and the result

basically accords with national standard. The detail see Appendix D.

2) Prepare the appropriate site for study. WJSC possesses the protein extraction

facility, eg. high temperature reactor, filter and concentrator, so we select WJSC

as experiment site, and redesign and install the established facility.





3) Transport 6 tons sludge from Nantaizi WWTP to WJSC, and conduct hydrolysis

experiment on 20 April,2009.

Mix the 6 tons sludge in the raw material Mixing Tank, then add lime and coduct

hydrolysis under high temperature, and extract 3 tons of bisolid and about 0.9

tons protein liquid.

4) Garden plant

Select Erlangmiao WWTP as plant site, and utilize hydrolyzed bisolid to establish

garden demonstration section.

The demonstration garden was designed with a size of 6m by 3m,18m2, and 10

garden plants was planted and monitored.





Figure 17. Over View of Planted Garden Figure 18. Section with Natural Soil

Figure 19. Section with Mixed Soils Figure 20. Section with Hydrolysis

Residue

3.3 WFPF Funds Util ization

In accordance to the Letter of Agreement signed between ADB and WUDDC, there

is total USD50,000 grant from WFPF allocated for this PDA, while WUDDC provides





counterpart funds for necessary activities such as office, transportation, translation,

etc with a budget of USD20,000. The utilization of WFPF grant is through four (4)

milestone disbursements: Advance, Inception Report, Mid-Term Report and Final

Report. The up to date funds utilization is shown in the SOE in Appendix C.

3.3.1 Contract Awards and Expenditure

3..3.1.1 Contract Awards To-date

As of 30 April 2009, five (5) contracts have been awarded for the Pilot Study and

accountable USD32,000 to WFPF Grant. Details are as follows:

(a) 3 consultancy services agreements were signed between WUDDC and 3

wastewater specialists on 5 November 2008, with total amount of

USD29,000.

(b) 1 design services agreement was signed between WUDDC and Prof. Li

Yadong, Prof. Li Haibo, with total amount of USD9,600, including the 2

agreements below:

the equipment lease agreement between WUDDC and WJSC

The civil contraction contract between WUDDC and Wuhan Kangxing

Environmental Equipment Co., Ltd.

3..3.1.2 Expenditure To-date

As of 30 April 2009, expenditure payable USD37,500 from WFPF Grant has

occurred, with the details shown below:

(a) Expenditure Paid

1. USD15,000 WFPF fund was paid to consultants during the inception

stage (refer to SOE No.1 of Inception Report);

2. USD5,000 was paid to in March, 2009.

(b) Invoices and Receipts to be Paid (refer to SOE No.2 of this Mid-Term

Report)

1. Invoices collected from 3 specialists

a. Mr. Tommy Zhang: USD51,00, invoice dated 30 April 2009;





b. Prof. Li Yadong: USD1,800, invoice dated 30 April 2009;

c. Prof. Li Haibo: USD1,800, invoice dated 30 April 2009.

2. Invoices collected from site designing and facility leasing:

a. USD4,100, invoice dated 20 March 2009.

3. Invoices collected from Wuhan Kangxing Environmental Equipment Co.,

Ltd:

a. USD4,000, invoice dated 28 April 2009.

4. Receipts to be collected after salaries paid

a. Ms. Liu Xiaoyan: USD1,650

b. Ms. Li Yan: USD1,650

c. Ms. Wang Haibo: USD1,200

d. Mr. Zhong Hao: USD1,200

3.3.2 Disbursement

3..3.2.1 Disbursement To-date

As of 30 April 2009, there has been USD20,000 WFPF fund disbursed.

(a) December 2008, USD20,000 advance payment was disbursed from ADB to

WUDDC account for project commencement.

3.2.2.2 Disbursement during the Reporting Period

There was no disbursement since inception due to the late submission of the

Inception Report.

3.4 Issues Identified

During the reporting period, several issues were identified in the areas of project

planning..





3.4.1 Project Planning

The six months project duration was updated to seven months in the Inception

Report, due to holidays in December 2008 and January 2009, and longer time

allowance for plants growing in the garden and better comparison result.

SECTION 4 NEXT STEP WORK PLAN

4.1 Perfect the Achievement of Pilot Study

Further analyze and study the Sludge Quality Report of all the WWTPs in

WuHan;

Tidy up and analyze all the raw data of pilot study, perfect the primary

achievement, further discuss the most suitable manner of beneficial use of sludge in

Wuhan;

Convene a proseminar, call the correlative consultants and other technologists

together to analysis the primary achievement, and advance more idea of the

application in the utilization of hydrolyzed protein;

Leave the hydrolyzed protein in the Sludge Resource Lab of HuBei University,

and this protein may be as the material for the application of hydrolyzed protein

4.2 Remedy Act ions to Issues Identified

Issues identified have shown that more funds are needed for further study on (1)

permanent pilot system purchase, installation, operation and maintenance; (2)

beneficial use of extracted protein as the source for vesicant and further

demonstration.

Remediation measures to the comparison of flowers growing in different soils have

been made by a weekly monitoring program and a long-term observation even after

this PDA.





4.3 Field Works

4.3.1 Gardening Record

After the protein was extracted, the hydrolysis field work was completed, so there isonly field gardening monitoring needed in the remaining study period. The monitoring

activity is scheduled in a weekly basis, and conducted by the two project secretaries

with guidance from researchers and assistant researchers. The record will be

analyzed in the Final Report.

4.4 End Users Survey

4.4.1 Survey Plan and Questionnaire Design

As per the reasons mentioned in 4.1.1, the end user of this pilot study will be mainly

public and private gardening organizations for hydrolysis residue application. A

survey plan and associated questionnaire are being developed by the Consultants,

and will be finalized in mid June 2009 when a reasonable progress monitoring result

is ready.

4.4.2 Survey Implementation

The end user survey will be conducted begin June 2009 after the questionnaire is

ready.

4.4.3 Financial Viability Study

The financial viability study will be based on the end user survey and market

information collection, which is scheduled mid June 2009.

4.5 Project Management

4.5.1 General Project Management

WUDDC has paid close attention to the PDA progress and made much efforts in

internal staffing to facilitate especially the hydrolysis residue gardening application.





Continuous support is committed from WUDDC Working Group and the Consultant

to keep the project management consistent, efficient and effective, e.g. WUDDC

property management staff have been appointed for garden watering and cleaning

works.

4.5.2 WFPF Funds Util ization

Delay of WFPF funds utilization was experienced due to late Inception Report

submission, the Consultants have contributed to the study under late pay condition

and will coordinate with WUDDC for prompt remedy actions. The Inception Report

and this Mid-Term Report submission together with 2 SOEs will resolve the situation

and make the fund available for project finalization.

4.5.3 Remedy Actions to Issues Identified

Lessens have been learnt on project coordination, commercial negotiation and

reporting in the previous study period, therefore, WUDDC and the Consultants will

pay attention to these issues，put more in this project and make the remaining study

smooth.

To resolve the issue of fund for further study on extracted protein application, the

Consultant has suggested the Working Group and WUDDC to consider further

financing, preferably from ADB as the continuation of this PDA.





APPENDIX A UPDATED IMPLEMENTATION SCHEDULE





APPENDIX B UPDATED STAFFING SCHEDULE





APPENDIX C STATEMENT OF EXPENDITURES




APPENDIX D SLUDGE MEASURING AND ANALYSIS REPORT

prc pda: sludge beneficial uses (midterm report)

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